Fajardo v. Boston Scientific Corp. ( 2022 )


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    LESLY FAJARDO ET AL. v. BOSTON
    SCIENTIFIC CORPORATION ET AL.
    (SC 20455)
    Robinson, C. J., and Palmer, D’Auria, Mullins,
    Kahn and Ecker, Js.*
    Syllabus
    Pursuant to this court’s decision in Bifolck v. Philip Morris, Inc. (
    324 Conn. 402
    ), under the risk-utility test, a product is in a defective condition
    that is unreasonably dangerous to the consumer if (1) a reasonable
    alternative design that would have avoided or reduced the risk of harm
    was available and the absence of that alternative design renders the
    product unreasonably dangerous, or (2) the product is a manifestly
    unreasonable design in that the risk of harm so clearly exceeds the
    product’s utility that a reasonable consumer, informed of those risks
    and utility, would not purchase the product.
    The plaintiffs, F and F’s husband, sought to recover damages from, among
    others, the defendant L, who was F’s gynecologist, L’s medical practice,
    and the defendant B Co. for personal injuries that F sustained in connec-
    tion with an unsuccessful surgery in which a transvaginal mesh sling
    designed by B Co., known as the Obtryx, was implanted in F’s body for
    the purpose of treating F’s stress urinary incontinence. During F’s annual
    health examination, L diagnosed F with pelvic organ prolapse and recom-
    mended that he perform a surgical repair known as a colporrhaphy. L
    also recommended that F undergo a sling procedure to rectify her stress
    urinary incontinence. Because L did not perform the sling procedure,
    he referred F to P, a urologist. P described to F the risks and benefits
    of, and alternatives to, the sling procedure, and F gave P her informed
    consent to proceed with both the colporrhaphy and the sling procedure.
    The procedures were scheduled for the same day but performed consec-
    utively. Immediately after L performed the colporrhaphy, P implanted
    the Obtryx in F. Thereafter, F continued to experience pain and had
    the Obtryx removed. The plaintiffs’ complaint included claims against
    L and L’s medical practice, alleging that L had failed to obtain F’s
    informed consent to the sling procedure and that L made innocent,
    negligent or intentional misrepresentations regarding the risks and bene-
    fits of the sling procedure. The complaint also alleged a product liability
    claim against B Co. under the Connecticut Product Liability Act (§ 52-
    572m et seq.), namely, that the defective design of the Obtryx caused
    F’s injuries. Prior to trial, L and L’s medical practice, and the plaintiffs,
    filed separate motions for summary judgment in connection with the
    informed consent and misrepresentation claims. Specifically, the plain-
    tiffs claimed that L had assumed a duty to obtain F’s informed consent
    for the sling procedure by discussing and recommending that procedure
    to F. The trial court disagreed and, instead, granted the motion for
    summary judgment filed by L and L’s medical practice, concluding that
    the duty to obtain informed consent rests with the physician performing
    the procedure, namely, P. The trial court also rendered summary judg-
    ment for L and L’s medical practice on the misrepresentation claims.
    The plaintiffs’ product liability claim subsequently was tried to a jury.
    The plaintiffs introduced into evidence the testimony of a product design
    expert, R, and various medical studies, which referred to a class of mesh
    slings known as tension free vaginal tapes (TVTs) that are implanted
    in a retropubic fashion, unlike the Obtryx, which is implanted using a
    transobturator approach. R testified that all slings made of polypropyl-
    ene mesh, including the Obtryx and a certain TVT, are defective and
    unreasonably dangerous, that the polypropylene mesh caused a foreign
    body reaction in F and contributed to her injuries, and that a surgery
    known as the Burch procedure was his preferred method to treat stress
    urinary incontinence. He also testified regarding what he considered to
    be defects in the Obtryx, specifically, its heat-sealed middle section and
    detanged edges, which produce a stiffer mesh. Before the trial court
    charged the jury, the plaintiffs e-mailed the court, requesting an instruc-
    tion on both prongs of the risk-utility test. The court, however, declined
    to instruct the jury as to the reasonable alternative design prong and
    instructed the jury only with respect to the second prong regarding
    whether the design of the Obtryx was manifestly unreasonable. The jury
    returned a verdict for B Co., and the plaintiffs moved to set aside the
    verdict on the basis of the court’s failure to give a reasonable alternative
    design instruction. The trial court denied that motion and rendered
    judgment in accordance with the jury’s verdict, from which the plaintiffs
    appealed. Held:
    1. The trial court properly rendered summary judgment for L and L’s medical
    practice in connection with the plaintiffs’ informed consent claim: this
    court previously had concluded, as a matter of law, that the duty to
    obtain a patient’s informed consent rests solely with the physician who
    is to perform the procedure, and that jurisprudence was consistent
    with the rule recognized by most jurisdictions and legal and medical
    authorities that, when a physician refers a patient to a specialist for a
    consultation and that specialist performs the procedure, the specialist
    is solely responsible for educating the patient and obtaining her informed
    consent, even when the referring physician discussed the procedure
    with, or recommended it to, the patient; in the present case, the implanta-
    tion of the Obtryx by P was an entirely separate procedure from the
    colporrhaphy performed by L, P was solely responsible for the sling
    procedure, even though L suggested it to F and referred her to P, and
    the trial court properly relied on the unanimous expert testimony pre-
    sented at trial that the physician who performs a procedure, and not
    the referring physician, has the duty to obtain the patient’s informed
    consent to the procedure; moreover, the plaintiffs’ reliance on the lay
    standard of informed consent, which relates to the extent or degree of
    disclosure a physician must make to fulfill his duty rather than whether
    a physician has a duty to inform, was misplaced because L did not have
    a duty to obtain F’s informed consent in the first instance; furthermore,
    even if this court were to consider the colporrhaphy and the sling
    procedure to be a single procedure, the plaintiffs’ claim would nonethe-
    less fail because, when more than one physician provides care to a
    patient in relation to a particular medical condition, the patient must
    prove by expert testimony which physician, if any, owes the patient a
    duty to obtain informed consent, and all the experts testified at trial
    that it was the duty of P, not L, to obtain F’s informed consent to the
    sling procedure.
    2. The trial court properly rendered summary judgment for L and L’s medical
    practice in connection with the plaintiffs’ misrepresentation claims: this
    court recently held that an innocent misrepresentation claim is not
    viable in the context of a urogynecologist’s provision of medical services
    because such claims generally are governed by § 552C of the
    Restatement (Second) of Torts, which requires that the misrepresenta-
    tion occur in a ‘‘sale, rental or exchange transaction with another,’’ and
    the plaintiffs’ innocent misrepresentation claim failed as a matter of law
    because the only medical services L provided to F, namely, recommend-
    ing that F see a specialist and discussing the sling procedure, did not
    qualify as a sale, rental or exchange transaction; moreover, the plaintiffs’
    negligent and intentional misrepresentation claims also failed because
    L could not have negligently or intentionally misled, misinformed or
    misrepresented the quality, usefulness, risks or benefits of the Obtryx
    in light of the trial court’s findings that L was unaware of what brand
    of sling P planned to implant in F and that L never discussed with F
    the Obtryx or any other products manufactured by B Co.
    3. The plaintiffs could not prevail on their claim that the trial court improperly
    declined to instruct the jury on the reasonable alternative design prong
    of the risk-utility test:
    a. This court assumed, without deciding, that the plaintiffs preserved
    their challenge to the trial court’s jury instruction for purposes of this
    appeal because, even though the plaintiffs did not take exception to the
    instruction until after the jury was instructed and even though their
    e-mail request to charge the jury did not comply with the relevant rules
    of practice (§§ 16-21 and 16-23) insofar as it neither constituted a written
    request nor cited to any supporting evidence in the record, the trial court
    nonetheless determined that the plaintiffs timely requested a reasonable
    alternative design charge and addressed the claim on the merits.
    b. In order to establish that they were entitled to an instruction on
    reasonable alternative design, the plaintiffs were required to present
    expert testimony regarding the alleged design defect of the Obtryx,
    whether an alternative design was technically and economically feasible,
    and whether the alternative would have reduced or avoided the risk of
    harm to F, as those issues involved complicated medical principles that
    were beyond the ken of the average juror; in the present case, the trial
    court determined, and the plaintiffs agreed, that R was the plaintiffs’
    product design expert, and, because the trial court correctly concluded
    that R was the only witness qualified to testify concerning reasonable
    alternative design, it properly focused on R’s testimony in considering
    whether the plaintiffs had produced sufficient evidence to warrant such
    an instruction.
    c. The plaintiffs failed to produce sufficient evidence that the class of
    retropubic slings consisting of TVTs constituted a reasonable alternative
    design to the Obtryx and that B Co.’s failure to use that alternative design
    rendered the Obtryx unreasonably dangerous: the plaintiffs’ references
    to TVTs did not constitute identification of a reasonable alternative
    design, as the evidence demonstrated that the safety data related to TVT
    products, which can be made of many different types of mesh material
    with different pore sizes and weights that alter the performance of those
    products, varied considerably, and, to the extent that there was evidence
    regarding the safety data of TVTs, the studies the plaintiffs relied on
    indicated merely that there were risks and complications with the use
    of TVT products, not that there was another product on the market that
    would have reduced the risk of harm to F in comparison to the Obtryx;
    moreover, some TVT products suffer from the same alleged defects as
    the Obtryx, namely, its heat seal and detanged edges, R testified that all
    transvaginal slings, including a specific TVT, made of polypropylene
    mesh are defective and unreasonably dangerous, regardless of whether
    they are heat-sealed or detanged, and the primary medical study on
    which the plaintiffs relied compared the Obtryx to a TVT manufactured
    by B Co., which was made of the same material and had the same heat
    seal as the Obtryx, and, therefore, did not support the plaintiffs’ claim
    that there was a reasonable alternative design that would have reduced
    or avoided the risk of harm to F; furthermore, the plaintiffs did not point
    to a specific existing product and demonstrate that its use would have
    reduced or avoided the risk of harm to F but, rather, took a scattershot
    approach, pointing to different alternatives to the Obtryx, including surgi-
    cal options, such as the Burch procedure, and the class of products
    known as TVTs, and that evidence did not demonstrate that any particular
    product was safer or would have reduced or avoided the risk of harm
    to F when compared to the Obtryx.
    (One justice concurring in part and dissenting in part)
    Argued April 27, 2020—officially released December 16, 2021*
    Procedural History
    Action to recover damages for, inter alia, personal
    injuries resulting from an allegedly defective product,
    and for other relief, brought to the Superior Court in the
    judicial district of Stamford-Norwalk and transferred
    to the Complex Litigation Docket, where the complaint
    was withdrawn as to the defendant Bridgeport Hospital;
    thereafter, the court, Zemetis, J., granted the motions
    for summary judgment filed by the defendant Lee
    Jacobs et al. and rendered judgment thereon; subse-
    quently, the case was tried to a jury before Zemetis, J.;
    verdict for the named defendant; thereafter, the court
    denied the plaintiffs’ motion to set aside the verdict
    and rendered judgment in accordance with the verdict,
    from which the plaintiffs appealed. Affirmed.
    Brenden P. Leydon and Jacqueline E. Fusco, for the
    appellants (plaintiffs).
    Daniel B. Rogers, pro hac vice, with whom were
    Proloy K. Das, Jennifer M. DelMonico and Eric Anie-
    lak, pro hac vice, for the appellee (named defendant).
    James F. Biondo, with whom, on the brief, was Diana
    M. Carlino, for the appellees (defendants Lee Jacobs
    et al.).
    Opinion
    MULLINS, J. This appeal arises from an action in
    which the named plaintiff, Lesly Fajardo (Fajardo),1
    suffered injuries related to the implantation of a transva-
    ginal mesh sling,2 a medical device that is implanted in
    women to treat stress urinary incontinence.3 In this
    action, the plaintiffs alleged that the named defendant,
    Boston Scientific Corporation (Boston Scientific),
    defectively designed its Obtryx Transobturator Mid-
    Urethral Sling System (Obtryx),4 a polypropylene trans-
    vaginal mesh sling, and that the product injured her in
    various ways after Edward Paraiso, a nonparty urolo-
    gist, implanted it in her. The plaintiffs claimed, as rele-
    vant to this appeal, that Boston Scientific’s sale of the
    Obtryx violated the Connecticut Product Liability Act,
    General Statutes § 52-572m et seq.
    The plaintiffs also brought, inter alia, claims of negli-
    gence sounding in informed consent and misrepresenta-
    tion against Fajardo’s gynecologist, the defendant Lee
    D. Jacobs, and Jacobs’ medical practice, the defendant
    OB-GYN of Fairfield County, P.C. (medical defen-
    dants).5 Their claims against the medical defendants
    rest on the theory that Jacobs, who referred Fajardo
    to Paraiso for a mesh sling implant, voluntarily assumed
    a duty to fully and accurately educate Fajardo as to the
    risks and benefits of, and the alternatives to, a mesh
    sling implant procedure. As to the misrepresentation
    claims, the plaintiffs alleged that Jacobs innocently,
    negligently and intentionally misled and misinformed
    Fajardo regarding the quality, usefulness, risks and/or
    benefits of the Obtryx.
    Prior to trial, the trial court granted the medical
    defendants’ motion for summary judgment, concluding,
    as a matter of law, that Jacobs, as a referring physician,
    had no duty to obtain Fajardo’s informed consent for
    a procedure that Paraiso was to perform. The court also
    rendered summary judgment in favor of the medical
    defendants on the plaintiffs’ misrepresentation claims.
    Thus, the case proceeded to trial only against Boston
    Scientific, and the jury returned a verdict in its favor.
    The plaintiffs moved to set aside the verdict, but the
    trial court denied that motion and rendered judgment
    in accordance with the jury’s verdict. This appeal fol-
    lowed.6
    On appeal, the plaintiffs claim that the trial court (1)
    incorrectly concluded that Jacobs did not owe a duty
    to procure Fajardo’s informed consent to the sling pro-
    cedure, (2) improperly rendered summary judgment in
    favor of the medical defendants on the plaintiffs’ mis-
    representation claims, and (3) improperly failed to
    instruct the jury that it could find Boston Scientific
    liable under the Connecticut Product Liability Act if
    Fajardo’s injuries resulted from Boston Scientific’s fail-
    ure to adopt a reasonable alternative design that ren-
    dered the Obtryx unreasonably dangerous. We con-
    clude that the trial court properly rendered summary
    judgment in favor of the medical defendants on the
    informed consent and misrepresentation claims and
    that it properly declined to instruct the jury on the
    reasonable alternative design prong of the risk-utility
    test. Accordingly, we affirm the judgment of the trial
    court.
    I
    CLAIMS AGAINST MEDICAL DEFENDANTS
    A
    Informed Consent Claim
    The plaintiffs assert that the trial court improperly
    rendered summary judgment in favor of the medical
    defendants because it incorrectly concluded that
    Jacobs had not assumed a duty to obtain Fajardo’s
    informed consent for implantation of the mesh sling
    and the sling procedure. Specifically, the plaintiffs argue
    that Jacobs assumed the duty by discussing and recom-
    mending the sling procedure to treat Fajardo’s stress
    urinary incontinence. The plaintiffs also claim that
    Jacobs had a duty to obtain Fajardo’s informed consent
    because Jacobs was involved in or maintained control
    over the surgical procedure performed by Paraiso. Nei-
    ther claim has merit.
    The following facts and procedural history are rele-
    vant to this claim. On March 26, 2010, Fajardo visited
    Jacobs, her gynecologist, for her annual preventative
    health examination. During that visit, Fajardo consulted
    with Jacobs about her gynecological and urological con-
    cerns. In his medical notes for this appointment, Jacobs
    noted that ‘‘ ‘[the] patient complains of stress inconti-
    nence daily, very disruptive, she wants surgical repair.’ ’’
    After a physical examination, Jacobs diagnosed
    Fajardo with pelvic organ prolapse—a weakness in the
    vaginal wall that causes the bladder, colon, or rectum
    to herniate into the vagina. Specifically, Jacobs deter-
    mined that Fajardo suffered from a grade 2 cystocele
    (prolapse of the bladder) and a grade 2 rectocele (pro-
    lapse of the posterior vaginal wall). Jacobs explained
    that a surgery to address the cystocele and rectocele
    probably would not rectify the incontinence issues.
    Consequently, given her interest in a more permanent
    fix to the incontinence issues, Jacobs discussed with
    Fajardo the option of ‘‘her see[ing] a urologist for an
    evaluation to see what could be offered to her [to
    address the incontinence].’’
    Also, during or as a result of this appointment, Jacobs
    wrote an office note, in which he stated that the ‘‘ ‘risks,
    benefits, and alternatives of sling/AP (anterior and pos-
    terior colporrhaphy)7 discussed, all questions
    answered.’ ’’ (Footnote added; footnote omitted.) Then,
    as he had with numerous other similarly situated
    patients, he referred Fajardo to Paraiso, a urologist, for
    consultation and evaluation regarding her stress urinary
    incontinence.
    On April 10, 2010, Fajardo consulted with Paraiso.
    He diagnosed her with stress urinary incontinence and
    recommended that she consent to having Paraiso surgi-
    cally implant a midurethral mesh sling to treat it. Paraiso
    described the risks and benefits of, and alternatives
    to, the procedure. He then obtained Fajardo’s ‘‘oral
    ‘informed consent’ ’’ to proceed with surgical repairs
    to both her vaginal walls (a colporrhaphy performed
    by Jacobs) and urethra (a mesh sling implant performed
    by Paraiso).
    Paraiso also discussed with Fajardo that both proce-
    dures would occur on the same day in a hospital surgical
    setting. Fajardo thereafter signed two separate consent
    forms, one for the A/P repair to be performed by Jacobs,
    and one for the sling procedure to be performed by
    Paraiso. Paraiso then communicated this plan to
    Jacobs.
    On December 15, 2010, Fajardo signed Bridgeport
    Hospital’s informed consent form, after having read and
    discussed it with Jacobs. Thereafter, Jacobs surgically
    repaired Fajardo’s vaginal walls. Paraiso was not pres-
    ent during Jacobs’ portion of the surgery. On the same
    day, immediately following Jacobs’ procedure, Paraiso
    surgically implanted the Obtryx in Fajardo to address
    the stress urinary incontinence. Jacobs was not present
    during Paraiso’s procedure. Jacobs also was not aware
    of the type of mesh sling Paraiso implanted into Fajardo.
    Furthermore, Paraiso is not associated with the medical
    defendants and is not a party to this action. The plain-
    tiffs also do not allege that Jacobs had any vicarious
    liability for Paraiso’s actions.
    After these surgeries, Fajardo still experienced pain.
    Eventually, the sling had to be removed. As a result of
    her continued issues, and her belief that Jacobs had
    assumed a duty but failed to adequately inform her
    of the risks associated with the sling procedure, the
    plaintiffs brought claims against the medical defen-
    dants, alleging, inter alia, lack of informed consent, as
    well as intentional, negligent and innocent misrepresen-
    tation.
    Before trial, the plaintiffs moved for summary judg-
    ment. They claimed that they were entitled to summary
    judgment in connection with their informed consent
    claim against Jacobs because Jacobs ‘‘voluntarily
    assumed the duty to obtain informed consent from . . .
    Fajardo for implantation of the mesh sling and the mesh
    sling procedure when he recommended the sling proce-
    dure, informed her that it was mesh that would be
    permanently implanted into her to treat her stress uri-
    nary incontinence . . . [and that] it would fix her
    [stress urinary incontinence], and convinced her that
    it was safe.’’ The plaintiffs argued that the undisputed
    facts supported their claim.
    The medical defendants also filed a motion for sum-
    mary judgment on the informed consent issue. In sup-
    port of their motion, the medical defendants asserted
    that Jacobs was not obligated to obtain Fajardo’s
    informed consent for implantation of the mesh sling
    and the sling procedure because he was not the physi-
    cian who performed that procedure. The medical defen-
    dants relied on testimony from both their own and the
    plaintiffs’ experts, who all agreed that it was Paraiso’s
    duty—as the physician performing the surgery—to
    obtain Fajardo’s informed consent for implantation of
    the mesh sling and the sling procedure.
    Although the plaintiffs and the medical defendants
    gave slightly different accounts of the conversations
    that occurred during the March 26, 2010 appointment,
    both the plaintiffs and the medical defendants agreed
    that there were no disputed issues of material fact rele-
    vant to the informed consent claim. They agree that the
    issue for the trial court was whether, on the undisputed
    facts that Jacobs had discussed and recommended the
    sling procedure to Fajardo, as a matter of law, Jacobs
    was obligated to obtain Fajardo’s informed consent.
    The trial court denied the motion for summary judg-
    ment filed by the plaintiffs and granted the motion for
    summary judgment filed by the medical defendants. In
    doing so, the trial court explained: ‘‘[The plaintiffs urge]
    the court to impose a duty on Jacobs to obtain
    [Fajardo’s] informed consent for Paraiso’s implant of
    the [Boston Scientific] mesh because Jacobs ‘assumed
    a duty’ when, according to Jacobs’ . . . office note
    [dated March 26, 2010], [he made the notation that]
    the ‘risks, benefits, and alternatives of sling/AP surgery
    discussed, all questions answered.’ The court rejects
    this request.’’ (Footnote omitted.) In rejecting that
    request, the trial court relied on Logan v. Greenwich
    Hospital Assn., 
    191 Conn. 282
    , 
    465 A.2d 294
     (1983), in
    which this court concluded that ‘‘[t]he principle that
    one who gratuitously undertakes a service [that] he has
    no duty to perform must act with reasonable care in
    completing the task assumed is not applicable to’’ a
    physician who discussed a procedure with a patient
    but then referred the patient to another physician to
    perform the surgery. Id., 305.
    The trial court concluded that, in the present case,
    ‘‘Jacobs was a referring physician regarding the urologi-
    cal surgery performed by Paraiso. Jacobs is not alleged
    to have any vicarious liability for the conduct of Para-
    iso.’’ The trial court further concluded that the duty
    to obtain informed consent ‘‘rests [with] the physician
    performing the procedure. The procedure is the mesh
    implant. Paraiso performed the implant. Paraiso, not
    Jacobs, had to obtain [Fajardo’s] informed consent for
    the surgical implantation of the [Boston Scientific]
    mesh product.’’
    On appeal, the plaintiffs assert that the trial court
    misapplied Logan v. Greenwich Hospital Assn., supra,
    
    191 Conn. 305
    , in concluding that a physician can never
    assume a duty of obtaining informed consent. We read
    neither Logan nor the trial court’s interpretation of
    that decision as concluding that a physician can never
    assume a such duty. Rather, as we explain herein, we
    agree with the medical defendants that, under the cir-
    cumstances of the present case and without expert
    testimony to the contrary, the physician conducting the
    vaginal mesh implantation surgery was responsible for
    obtaining Fajardo’s informed consent.
    We first set forth the applicable standard of review.
    ‘‘Practice Book [§ 17-49] provides that summary judg-
    ment shall be rendered forthwith if the pleadings, affida-
    vits and any other proof submitted show that there is
    no genuine issue as to any material fact and that the
    moving party is entitled to judgment as a matter of law.
    . . . In deciding a motion for summary judgment, the
    trial court must view the evidence in the light most
    favorable to the nonmoving party. . . . The party seek-
    ing summary judgment has the burden of showing the
    absence of any genuine issue [of] material facts which,
    under applicable principles of substantive law, entitle
    him to a judgment as a matter of law . . . and the party
    opposing such a motion must provide an evidentiary
    foundation to demonstrate the existence of a genuine
    issue of material fact. . . . Finally, the scope of our
    review of the trial court’s decision to grant the plaintiff’s
    motion for summary judgment is plenary.’’ (Internal
    quotation marks omitted.) Dougan v. Sikorsky Aircraft
    Corp., 
    337 Conn. 27
    , 35, 
    251 A.3d 583
     (2020).
    We begin our analysis with a brief review of the law
    of informed consent. ‘‘The informed consent doctrine
    derives from the principle that [e]very human being of
    adult years and sound mind has a right to determine
    what shall be done with his own body; and a surgeon
    who performs an operation without his patient’s con-
    sent . . . commits an assault, for which he is liable in
    damages.’’ (Internal quotation marks omitted.) Sher-
    wood v. Danbury Hospital, 
    278 Conn. 163
    , 180, 
    896 A.2d 777
     (2006). ‘‘The essential elements of a cause of
    action based [on] a lack of informed consent are [1] a
    breach of [2] duty by the defendant and [3] a causal
    connection between that breach and [4] the harm to
    the plaintiff.’’ Lambert v. Stovell, 
    205 Conn. 1
    , 6, 
    529 A.2d 710
     (1987). Only the second element, duty, is at
    issue in the present appeal.
    In the realm of informed consent, as throughout the
    law of tort, ‘‘[t]he existence of a duty is a question of
    law and [o]nly if such a duty is found to exist does
    the trier of fact then determine whether the defendant
    violated that duty in the particular situation at hand.
    . . . If the court determines, as a matter of law, that a
    defendant owes no duty to a plaintiff, a verdict should
    be directed [or summary judgment rendered] because
    [i]t is merely reaching more speedily and directly a
    result [that] would inevitably be reached in the end.’’
    (Citation omitted; internal quotation marks omitted.)
    Petriello v. Kalman, 
    215 Conn. 377
    , 382–83, 
    576 A.2d 474
     (1990).
    Several of our informed consent cases have pre-
    sented, in one form or another, the issue of whether a
    physician or institution may owe a duty to obtain a
    patient’s informed consent to a procedure that is to be
    performed by a third-party physician. In each case, this
    court has concluded, as a matter of law, that the physi-
    cian who performed the procedure was solely responsi-
    ble for obtaining the patient’s informed consent. See,
    e.g., Sherwood v. Danbury Hospital, supra, 
    278 Conn. 171
     n.8 (treating physician, rather than hospital, is
    responsible for procuring patient’s informed consent);
    Petriello v. Kalman, supra, 
    215 Conn. 385
     (‘‘informed
    consent . . . is the sole responsibility of the attending
    physician to obtain’’); Logan v. Greenwich Hospital
    Assn., supra, 
    191 Conn. 304
    –306 (internist who dis-
    cussed kidney biopsy with patient and referred her to
    urologist to obtain biopsy did not assume duty to pro-
    cure patient’s informed consent). The Appellate Court
    has reached the same conclusion. See, e.g., Torres v.
    Carrese, 
    149 Conn. App. 596
    , 622–23, 
    90 A.3d 256
    , cert.
    denied, 
    312 Conn. 912
    , 
    93 A.3d 595
     (2014); Mason v.
    Walsh, 
    26 Conn. App. 225
    , 230–31, 
    600 A.2d 326
     (1991),
    cert. denied, 
    221 Conn. 909
    , 
    602 A.2d 9
     (1992).
    Those results are consistent with the rule, recognized
    by other jurisdictions and legal and medical authorities,
    that, when a physician refers a patient to a specialist
    for a consultation, it is the specialist—assuming that
    he ultimately performs the procedure at issue—who is
    solely responsible for educating the patient and
    obtaining her informed consent. See, e.g., Brotherton
    v. United States, Docket No. 2:17-CV-00098-JLQ, 
    2018 WL 3747802
    , *4 (E.D. Wn. August 7, 2018) (‘‘the majority
    of jurisdictions that have addressed whether referring
    physicians have a duty to obtain a patient’s informed
    consent have concluded that they do not’’ (internal quo-
    tation marks omitted)); 61 Am. Jur. 2d 314, Physicians,
    Surgeons, and Other Healers § 168 (2012) (‘‘only the
    physician or health care provider who actually gives
    the treatment or performs the operation has a duty to
    inform the patient of the risks involved and [to] obtain
    the patient’s informed consent’’).
    As one federal court has explained, ‘‘[t]his makes
    common sense. The physician performing a procedure
    should advise on the risks of the procedure. When a
    primary care physician refers a matter to a specialist,
    it is not logical to impose a legal duty on the primary
    care physician to explain the risk of a procedure [that]
    the specialist may perform. Generally the reason for
    the referral to a specialist is because the specialist has
    more training, knowledge, or experience in the particu-
    lar area of medicine.’’ Brotherton v. United States,
    supra, 
    2018 WL 3747802
    , *5.
    In Connecticut, Logan v. Greenwich Hospital Assn.,
    supra, 
    191 Conn. 282
    , is the seminal case regarding
    the duty of a referring physician to obtain informed
    consent. In Logan, this court examined whether the
    plaintiff’s internal medicine specialist (internist) had a
    duty to obtain the plaintiff’s informed consent for a
    needle biopsy of her kidney that was performed by a
    different physician. See 
    id.,
     304–306. The internist had
    informed the patient that she had lupus and recom-
    mended that she get a biopsy of her kidneys to deter-
    mine to what extent the lupus had affected her kidneys.
    
    Id.,
     284–85. The internist explained that the procedure
    would involve the insertion of a needle into her back to
    obtain a specimen of kidney tissue. Id., 285. He further
    explained that it was a simple procedure in which local
    anesthesia would be used, that she may experience
    some bleeding and discomfort, and that she could leave
    the hospital in a day or two if there were no complica-
    tions. Id.
    The internist referred the plaintiff to Peter Bogdan,
    a urologist who would perform the operation, and told
    the patient that Bogdan would describe the details more
    fully. Id. Bogdan performed the needle biopsy and
    injured the plaintiff during the procedure. Id., 286–87.
    The plaintiff brought a claim of negligence against the
    internist for failure to obtain her informed consent. Id.,
    287. The trial court denied the internist’s motion for a
    directed verdict, but the jury nonetheless returned a
    verdict in favor of the internist. The plaintiff appealed.
    Id., 284.
    On appeal, this court concluded that the trial court
    should have granted the internist’s motion for a directed
    verdict. In doing so, this court explained: ‘‘Although it
    is undisputed that [the internist] did discuss the kidney
    biopsy with the plaintiff and describe the procedure
    generally, there was no evidence that it was his duty
    to do so. In fact, the testimony indicated the contrary.
    The plaintiff’s expert witness . . . testified that an
    internist . . . had no obligation to discuss the surgical
    procedure with the plaintiff or to obtain her informed
    consent. He stated unequivocally that those duties
    rested [with] the physician who was to perform the
    operation.’’ Id., 305.
    In reaching this conclusion, this court expressly
    rejected the voluntary assumption of duty principle on
    which the plaintiffs rely in the present case. In Logan,
    the plaintiff claimed that the internist, by discussing
    the biopsy procedure with her, assumed and therefore
    owed a duty to the plaintiff to obtain her informed
    consent. Responding to this claim, this court clarified
    that ‘‘[t]he principle that one who gratuitously under-
    takes a service [that] he has no duty to perform must act
    with reasonable care in completing the task assumed
    is not applicable to this situation. . . . Although [the
    internist] did describe the general nature of the opera-
    tion to the plaintiff and some of the possible complica-
    tions, he also told her that a more detailed explanation
    would be provided by Bogdan, the urologist. There is
    no evidence that his reliance [on] the operating surgeon
    to provide the information necessary for informed con-
    sent was contrary to normal medical practice or was
    unreasonable under these particular circumstances.’’
    (Citations omitted.) Id.
    Logan is in line with the rule followed in most juris-
    dictions, which is that the physician conducting the
    surgery is the one who owes the duty of obtaining the
    patient’s informed consent. This rule applies even under
    circumstances in which the referring physician dis-
    cusses the surgical procedure with the patient and rec-
    ommends that the patient undergo the procedure.
    Logan teaches that it is the physician who performs
    the actual procedure who is responsible for obtaining
    the informed consent to that procedure.
    In the present case, Jacobs, Paraiso and the plaintiffs
    all agree that the implantation of the sling, performed
    by Paraiso, was a separate procedure from the repair
    to the vaginal wall performed by Jacobs. And Paraiso
    was solely responsible for performing the sling proce-
    dure. Thus, like the internist in Logan, notwithstanding
    the fact that Jacobs may have mentioned the sling pro-
    cedure or even suggested that Fajardo may be a good
    candidate for the sling procedure, the fact remains that
    Jacobs referred her to Paraiso, the specialist, for further
    consultation. The plaintiffs presented no evidence to
    undermine the fact that Paraiso, as the physician who
    performed the sling procedure, was the physician
    responsible for obtaining Fajardo’s informed consent.
    In fact, here, as in Logan, even the plaintiffs’ experts
    explained that the physician who performs the surgery
    is required to obtain a patient’s informed consent, not
    the referring physician. Indeed, the plaintiffs’ expert,
    Richard Bercik, a urologist, testified: ‘‘[T]he surgeon
    who is doing the procedure is responsible for the evalua-
    tion of the patient for that condition, the selection of
    how they’re going to do the surgery, what they’re going
    to do, and informing the patient. That’s all [in] the hands
    of the person doing the procedure.’’ The medical defen-
    dants’ expert also agreed that it was the duty of the
    surgeon who performed the implantation procedure to
    obtain the patient’s informed consent for that procedure
    and not the referring physician.
    In rendering summary judgment, the trial court relied
    on the fact that ‘‘all disclosed medical experts agree
    [that] Paraiso, not Jacobs, had to obtain [Fajardo’s]
    informed consent for the implant[ation] of the mesh
    product.’’ We conclude that the trial court properly
    relied on the unanimous expert testimony to support
    its conclusion that Jacobs did not owe a duty to Fajardo
    to obtain her informed consent.
    The plaintiffs also raise a similar but slightly different
    argument to support their claim that Jacobs had a duty
    to obtain Fajardo’s informed consent to the sling proce-
    dure. In particular, they argue that, because Jacobs was
    Fajardo’s gynecologist and she had established a high
    level of trust with him, she expected and trusted him
    to give her the information necessary for her to give
    informed consent. For support, they rely on the lay
    standard of informed consent adopted in Logan. They
    claim that the lay standard requires this court to deter-
    mine whether a particular physician has a duty to obtain
    informed consent based on the patient’s perspective of
    the interaction, instead of by relying on expert testi-
    mony regarding common practices in the medical com-
    munity. We disagree.
    In Logan v. Greenwich Hospital Assn., supra, 
    191 Conn. 282
    , this court concluded that, in order to obtain
    informed consent from a patient, a physician must ‘‘pro-
    vide the patient with that information [that] a reason-
    able patient would have found material for making a
    decision whether to embark [on] a contemplated course
    of therapy.’’ 
    Id.,
     292–93. This standard is referred to as
    the ‘‘lay standard of disclosure’’ because it focuses on
    what information a reasonable patient would want to
    know about a particular procedure in order to give his
    or her informed consent. 
    Id.
    We have made clear that ‘‘[o]ur standard of disclosure
    for informed consent in this state is an objective stan-
    dard that does not vary from patient to patient based
    on what the patient asks or what the patient would do
    with the information if it were disclosed. . . . [T]he
    lay standard of informed consent requires a physician
    to provide the patient with that information [that] a
    reasonable patient would have found material for mak-
    ing a decision whether to embark [on] a contemplated
    course of therapy. . . . In adopting the objective lay
    standard, this court recognized that rather than impose
    on the physician an obligation to disclose at his peril
    whatever the particular patient might deem material to
    his choice, most courts have attempted to frame a less
    subjective measure of the physician’s duty.’’ (Citation
    omitted; emphasis omitted; internal quotation marks
    omitted.) Duffy v. Flagg, 
    279 Conn. 682
    , 692, 
    905 A.2d 15
     (2006).
    Contrary to the plaintiffs’ assertion, the lay standard
    adopted in Logan does not speak to whether a physician
    has a duty to inform, but, rather, the standard governs
    how a physician who has a duty to obtain informed
    consent fulfills that duty. In other words, the lay stan-
    dard applies only to the content of the disclosure that
    must be made. It is only once the duty to inform is
    established that the lay standard dictates how that duty
    must be satisfied. See Mason v. Walsh, supra, 
    26 Conn. App. 230
     (‘‘[o]nce the existence of the duty to inform
    has been established, the degree or extent of disclosure
    necessary to satisfy the duty must be proven in accor-
    dance with the lay standard’’). If the physician does not
    have a duty in the first instance, the lay standard simply
    does not apply. Here, Jacobs never had the duty to
    obtain Fajardo’s informed consent for the mesh implan-
    tation procedure. Thus, for purposes of determining
    whether Jacobs had a duty to inform at all, the lay
    standard does not inform that question.
    Lastly, the plaintiffs claim that, because the two sur-
    geries here took place on the same day and Jacobs
    maintained control over the procedures, he thus owed
    a duty to obtain Fajardo’s informed consent. This claim
    is factually and legally meritless.
    First, it is undisputed that the two surgeries were
    separate procedures, performed by different physicians
    with different training and specialties. Jacobs was not
    present when Paraiso performed the implantation pro-
    cedure. Most important, it is undisputed that it was
    Paraiso, not Jacobs, who decided which vaginal mesh
    to implant in Fajardo, consistent with normal medical
    practice. The plaintiffs have failed to point to any evi-
    dence to support their claim that Jacobs retained con-
    trol over the implantation of the surgical mesh, which
    occurred during a different surgery. Thus, the fact that
    these distinct surgeries took place on the same day
    does not establish that Jacobs maintained control over
    the separate procedure performed by Paraiso. As a fac-
    tual matter, then, this is not a scenario in which multiple
    physicians were performing or involved in a single surgi-
    cal procedure.8
    Second, even if we were to consider both surgeries
    as one surgical procedure, despite all of the evidence
    to the contrary, the plaintiffs’ claim still fails because
    they provided no expert testimony to demonstrate that
    Jacobs had any duty to obtain Fajardo’s informed con-
    sent. To be sure, this court has clarified that, when
    more than one physician provides care to the plaintiff,
    in relation to a particular medical condition, the plaintiff
    must prove by expert testimony which physician, if any,
    owes the plaintiff a duty to obtain informed consent.
    See Godwin v. Danbury Eye Physicians & Surgeons,
    P.C., 
    254 Conn. 131
    , 144, 
    757 A.2d 516
     (2000), citing
    Mason v. Walsh, supra, 
    26 Conn. App. 230
    ; see also
    Mason v. Walsh, supra, 230 (‘‘[When] . . . a surgeon
    engages one or more specialists to perform a portion
    of a procedure, the issue as to who has the duty to obtain
    the patient’s consent to that portion of the procedure
    to be performed by the specialist arises. It was incum-
    bent [on] the plaintiff to establish by expert testimony
    which of the physicians, if any, owed him the duty of
    disclosing sufficient facts to permit him to exercise an
    informed consent to the use of general anesthesia.’’
    (Emphasis added.)).
    In the present case, even Bercik, the plaintiffs’ expert,
    a urogynecologist and reconstructive surgeon, and pro-
    fessor of female pelvic medicine, agreed with Jacobs
    and Paraiso that, as a general matter, it is the consulting
    surgeon who is going to perform the procedure who
    is responsible for evaluating the patient, selecting the
    appropriate treatment, and educating the patient
    regarding that procedure. Frederick Rau, the medical
    defendants’ expert, a board certified obstetrician and
    gynecologist, agreed that, under circumstances such as
    these, ‘‘[t]he referring physician has no medical duty
    or responsibility to obtain a patient’s informed consent
    for a surgical procedure he/she is not going to perform.
    . . . [I]n this case . . . Jacobs acted entirely reason-
    ably in discussing a potential sling procedure with
    [Fajardo], but he had no duty to obtain [her] informed
    consent for the ultimate sling procedure that was per-
    formed.’’ Thus, not a single expert testified that Jacobs
    had a duty to obtain Fajardo’s informed consent to the
    mesh implant.
    Based on the foregoing, we conclude that the trial
    court properly rendered summary judgment in favor of
    the medical defendants in connection with the informed
    consent claim.
    B
    Misrepresentation Claims
    The plaintiffs also claim on appeal that the trial court
    improperly rendered summary judgment in favor of the
    medical defendants on the claims of innocent, negligent,
    and intentional misrepresentation. We disagree.
    First, this court recently concluded that a claim of
    innocent misrepresentation against a urogynecologic
    surgeon did not lie as a matter of law. See Farrell v.
    Johnson & Johnson, 
    335 Conn. 398
    , 421, 
    238 A.3d 698
    (2020). In so concluding, this court explained that the
    surgeon’s ‘‘provision of medical services did not qualify
    as a ‘sale, rental or exchange transaction’ under § 552C
    of the Restatement (Second) [of Torts], and, therefore,
    a claim for innocent misrepresentation does not lie
    under our existing innocent misrepresentation prece-
    dent.’’ Id. Similarly, in the present case, Jacobs’ provi-
    sion of medical services, which involved only his recom-
    mendation that Fajardo see a specialist and discuss the
    sling procedure, does not qualify as a ‘‘sale, rental or
    exchange transaction . . . .’’ 3 Restatement (Second),
    Torts § 552C, p. 141 (1977). Therefore, the plaintiffs’
    claim of innocent misrepresentation fails as a matter
    of law.
    Second, we agree with the trial court that the plain-
    tiffs’ claims of negligent and/or intentional misrepresen-
    tation also fail. The trial court found that ‘‘Jacobs was
    unaware of what kind of a sling Paraiso planned to
    implant in [Fajardo].’’ Indeed, the trial court also found
    that ‘‘the parties agree [that] Jacobs never discussed
    [Boston Scientific] products with [Fajardo].’’ Thus,
    because Jacobs did not know what product Paraiso
    would implant in Fajardo and never discussed Boston
    Scientific products with Fajardo, he could not have
    negligently or intentionally misled, misinformed or mis-
    represented the quality, usefulness, risks and benefits
    of the Obtryx.
    Accordingly, we conclude that the trial court properly
    rendered summary judgment in favor of the medical
    defendants on the plaintiffs’ misrepresentation claims.
    II
    INSTRUCTIONAL ERROR CLAIM AGAINST
    BOSTON SCIENTIFIC
    We next turn to the plaintiffs’ claim that the trial
    court improperly declined to charge the jury on the
    reasonable alternative design prong of the risk-utility
    test. Specifically, the plaintiffs claim that they intro-
    duced sufficient evidence that the tension free vaginal
    tape (TVT)9 was a safer reasonable alternative design
    to Boston Scientific’s device, the Obtryx, which caused
    Fajardo’s injuries. Boston Scientific contends that the
    plaintiffs’ instructional error claim is unreviewable
    because it was not timely or properly preserved. Boston
    Scientific argues, in the alternative, that, if we conclude
    that the claim is reviewable, no such instruction was
    warranted in light of the evidence that was presented
    at trial and the governing law.
    Even if we assume, for purposes of this appeal, that
    the request for a reasonable alternative design instruc-
    tion was timely and properly made, we agree with the
    trial court that the evidence did not support such an
    instruction. Accordingly, we affirm the judgment of the
    trial court.
    A
    Legal Background
    Before we turn to the parties’ specific contentions,
    it is helpful briefly to situate the dispute within its
    broader legal context. In 2016, we decided a pair of
    cases that required us to reexamine and clarify the
    legal standards that govern claims brought under the
    Connecticut Product Liability Act. See Bifolck v. Philip
    Morris, Inc., 
    324 Conn. 402
    , 
    152 A.3d 1183
     (2016); Izzar-
    elli v. R.J. Reynolds Tobacco Co., 
    321 Conn. 172
    , 
    136 A.3d 1232
     (2016).
    In Izzarelli, we sharply limited the scope of the tradi-
    tional legal standard governing defective product design
    claims, the so-called ‘‘ordinary consumer expectation
    test,’’ under which, ‘‘[t]o be considered unreasonably
    dangerous, the article sold must be dangerous to an
    extent beyond that which would be contemplated by the
    ordinary consumer who purchases it, with the ordinary
    knowledge common to the community as to its charac-
    teristics.’’ (Internal quotation marks omitted.) Izzarelli
    v. R.J. Reynolds Tobacco Co., supra, 
    321 Conn. 185
    . We
    clarified that that test ‘‘would be appropriate [only]
    when the incident causing injury is so bizarre or unusual
    that the jury would not need expert testimony to con-
    clude that the product failed to meet the consumer’s
    expectations.’’ Id., 191. In other words, ‘‘[t]he ordinary
    consumer expectation test is reserved for cases in
    which the product failed to meet the ordinary consum-
    er’s minimum safety expectations, such as res ipsa
    [loquitur] type cases.’’ (Emphasis omitted.) Id., 194.
    In most product liability cases, by contrast, the plain-
    tiff is required to establish a defective design under the
    modified consumer expectation test, pursuant to which
    ‘‘the jury would weigh the product’s risks and utility
    and then inquire, in light of those factors, whether a
    reasonable consumer would consider the product
    design unreasonably dangerous.’’ (Internal quotation
    marks omitted.) Id., 190; see id., 194. In applying that
    test, we indicated that the jury is to be instructed to
    consider a nonexclusive list of factors, one of which
    may be the availability of a feasible alternative design.
    See id., 190–91, 208–10.
    In Bifolck, we further clarified Izzarelli’s ordinary
    and modified consumer expectation tests. First, we
    renamed them the ‘‘consumer expectation test’’ and the
    ‘‘risk-utility test,’’ respectively. Bifolck v. Philip Morris,
    Inc., supra, 
    324 Conn. 432
    . Second, we set forth two
    distinct prongs or methods by which the latter test
    may be satisfied. ‘‘Under the risk-utility test, which will
    govern most cases, a product is in a defective condition
    unreasonably dangerous to the consumer or user if:
    ‘‘(1) A reasonable alternative design was available
    that would have avoided or reduced the risk of harm
    and the absence of that alternative design renders the
    product unreasonably dangerous. In considering
    whether there is a reasonable alternative design, the
    jury must consider the feasibility of the alternative.
    Other relevant factors that a jury may consider include,
    but are not limited to, the ability of the alternative
    design to reduce the product’s danger without unrea-
    sonably impairing its usefulness, longevity, mainte-
    nance, and esthetics, without unreasonably increasing
    cost, and without creating other equal or greater risks
    of danger [Bifolck 1]; or
    ‘‘(2) The product is a manifestly unreasonable design
    in that the risk of harm so clearly exceeds the product’s
    utility that a reasonable consumer, informed of those
    risks and utility, would not purchase the product
    [Bifolck 2].’’ 
    Id.,
     434–35.
    Here, the trial court declined to give an instruction
    under Bifolck 1 and gave only a Bifolck 2 instruction.
    The question in the present case is whether the trial
    court correctly concluded that the evidence did not
    support an instruction under the reasonable alternative
    design prong of the risk-utility test (i.e., Bifolck 1). We
    conclude that it did.
    It is well established that, ‘‘[i]n determining whether
    the trial court improperly refused a request to charge,
    [w]e . . . review the evidence presented at trial in the
    light most favorable to supporting the . . . proposed
    charge. . . . A request to charge [that] is relevant to
    the issues of [a] case and [that] is an accurate statement
    of the law must be given. . . . If, however, the evidence
    would not reasonably support a finding of the particular
    issue, the trial court has a duty not to submit it to the
    jury. . . . Thus, a trial court should instruct the jury
    in accordance with a party’s request to charge [only]
    if the proposed instructions are reasonably supported
    by the evidence. . . . If . . . the evidence reasonably
    does not support a finding on the particular issue, the
    trial court is duty bound to refrain from submitting it
    to the jury.’’ (Citation omitted; internal quotation marks
    omitted.) Brown v. Robishaw, 
    282 Conn. 628
    , 633, 
    922 A.2d 1086
     (2007).
    Whether the evidence presented by a party reason-
    ably supports a particular request to charge ‘‘is a ques-
    tion of law over which our review is plenary.’’ 
    Id.
     Simi-
    larly, whether there is a legal basis for the requested
    charge is a question of law also entitled to plenary
    review. See 
    id.,
     633–34.
    B
    Reviewability of Plaintiffs’ Instructional Claim
    First, we must address Boston Scientific’s assertion
    that the plaintiffs’ claim is unreviewable because the
    plaintiffs failed to properly preserve their challenge
    regarding the instruction. Boston Scientific contends
    that the plaintiffs’ Bifolck 1 instruction claim is unpre-
    served because they did not submit a written request
    to charge on the instruction and also failed to cite evi-
    dence in the record to support such an instruction pur-
    suant to Practice Book §§ 16-21 and 16-23. The following
    facts are necessary to address this contention.
    Before the trial court charged the jury, the parties
    and the court had off-the-record discussions regarding
    Bifolck 1, the reasonable alternative design charge. Fol-
    lowing those discussions, the plaintiffs requested the
    charge through an e-mail to the court and did not cite
    to any evidence in the record to support the request.10
    However, the plaintiffs did not formally submit a written
    request for the court to charge the jury as to Bifolck 1
    pursuant to Practice Book §§ 16-21 and 16-23; nor did
    they take exception to the court’s charge on the record
    before the jury was instructed.11
    It was not until the jury had been charged and dis-
    missed for the day that the plaintiffs formally took
    exception to the court’s design defect instruction,
    claiming entitlement to an instruction on Bifolck 1.
    Although the plaintiffs’ request did not technically com-
    ply with the requirements of Practice Book §§ 16-21
    and 16-23, the trial court determined that the plaintiffs
    ‘‘did timely submit a request to charge on the ‘reason-
    able alternative design’ test . . . .’’ Ultimately, in
    response to the plaintiffs’ motion to set aside the ver-
    dict, the trial court addressed the merits of the plaintiffs’
    claim and rejected it.
    It is important to note that, in their e-mail request to
    the court, the plaintiffs did not cite to any evidence to
    support their request for a Bifolck 1 charge. In failing
    to cite to any evidence in the request to charge, the
    plaintiffs failed to comply with Practice Book §§ 16-21
    and 16-23. Accordingly, the trial court would have been
    warranted in denying the plaintiffs’ request on the basis
    that the plaintiffs did not cite to evidence to support
    it. See, e.g., State v. Bettini, 
    11 Conn. App. 684
    , 690,
    
    528 A.2d 1180
     (‘‘[i]n the absence of compliance with
    the rules of practice, the trial court is entitled to deny
    a request to charge’’), cert. denied, 
    205 Conn. 804
    , 
    531 A.2d 937
     (1987); see also State v. Kendall, 
    123 Conn. App. 625
    , 672, 
    2 A.3d 990
    , cert. denied, 
    299 Conn. 902
    ,
    
    10 A.3d 521
     (2010).
    We point this out because it is this lack of specificity
    in the plaintiffs’ request to charge that the concurrence
    and dissent capitalizes on and uses as an opportunity
    to recast and create its own arguments that, in its opin-
    ion, the plaintiffs should have made at trial to support
    their request for a reasonable alternative design instruc-
    tion.
    Nevertheless, despite the plaintiffs’ failure to comply
    with Practice Book §§ 16-21 and 16-23, the trial court
    determined that the plaintiffs timely requested a Bifolck
    1 charge and addressed the request on the merits.
    Therefore, for the purposes of this appeal, we assume,
    without deciding, that the plaintiffs have preserved their
    challenge to the jury instruction.
    C
    Plaintiffs’ Instructional Claim
    The plaintiffs assert that the evidence presented at
    trial was sufficient to support the instruction, and, as
    a result, the trial court improperly declined to charge
    the jury on the reasonable alternative design prong of
    the risk-utility test. In support of their claim, the plain-
    tiffs cite to a study introduced into evidence; see S.
    Ross et al., ‘‘Transobturator Tape Compared with Ten-
    sion-Free Vaginal Tape for Stress Incontinence: A Ran-
    domized Controlled Trial,’’ 114 Obstetrics & Gynecol-
    ogy 1287 (2009) (Ross study); the testimony of their
    product design expert, Bruce Rosenzweig, and other
    studies admitted into evidence.
    Our decisions in Bifolck and Izzarelli establish the
    sonable alternative design instruction under the risk-
    utility test. In Bifolck, this court explained: ‘‘In order
    to state a prima facie case that will permit the case to
    be submitted to the jury, the plaintiff must simply prove
    that the alternative design was feasible (technically and
    economically) and that the alternative would have
    reduced or avoided the harm.’’ Bifolck v. Philip Morris,
    Inc., supra, 
    324 Conn. 433
    . In Izzarelli, in which we
    addressed cigarette design, this court explained that,
    ‘‘[t]o establish the defect, the plaintiff’s case required
    expert testimony on [product] design and manufacture,
    as well as the feasibility of an alternative design.’’ Izzar-
    elli v. R.J. Reynolds Tobacco Co., supra, 
    321 Conn. 203
    –
    204.
    At the outset, we must determine what type of evi-
    dence is sufficient to prove that an ‘‘alternative design
    was feasible (technically and economically) and that the
    alternative would have reduced or avoided the harm.’’
    Bifolck v. Philip Morris, Inc., supra, 
    324 Conn. 433
    .
    Although we concluded in Izzarelli that expert testi-
    mony was required in that case, a question has arisen
    as to whether expert testimony is always required as
    a necessary component under the risk-utility test. This
    court has not addressed that specific question.
    The issue has, however, received some attention in
    the federal courts. Indeed, as the United States District
    Court for the District of Connecticut has recognized,
    ‘‘[n]either Izzarelli nor Bifolck state[s] explicitly that
    expert testimony is required under the risk-utility test.
    However, both cases suggest it by juxtaposing the con-
    sumer expectation test, which does not require expert
    testimony, and the risk-utility test.’’ Frederick v. Deco
    Salon Furniture, Inc., Docket No. 3:16-cv-00060 (VLB),
    
    2018 WL 2750319
    , *7 (D. Conn. March 27, 2018). Consis-
    tent therewith, the United States District Court for the
    District of Connecticut and the Second Circuit have
    applied the expert requirement to such claims.
    For example, in deciding a motion for summary judg-
    ment for a defective design claim involving a water
    treatment pump, the United States District Court for
    the District of Connecticut concluded that ‘‘this is the
    type of complex case [that] requires an expert opinion
    as to defect and as to feasible alternative design.’’ Water
    Pollution Control Authority v. Flowserve US, Inc.,
    Docket No. 3:14-cv-00549 (VLB), 
    2018 WL 1525709
    , *24
    (D. Conn. March 28, 2018), aff’d, 
    782 Fed. Appx. 9
     (2d
    Cir. 2019).
    The court explained that, because the case involved
    the requirements of a pump for a wastewater treatment
    facility, the jury would not be ‘‘as capable of compre-
    hending the primary facts and of drawing correct con-
    clusions from them as are witnesses possessed of spe-
    cial or peculiar training.’’ (Internal quotation marks
    omitted.) 
    Id.
     The Second Circuit agreed with this analy-
    sis, explaining that, under Connecticut law, ‘‘[e]xpert
    evidence is necessary to satisfy the risk-utility test
    [when] the nexus between the injury and the alleged
    cause would not be obvious to the lay juror, because
    expert knowledge is often required in such circum-
    stances to establish the causal connection between the
    accident and some item of physical or mental injury.’’
    (Internal quotation marks omitted.) Water Pollution
    Control Authority v. Flowserve US, Inc., 
    782 Fed. Appx. 9
    , 14–15 (2d Cir. 2019).
    This position is consistent with the majority of other
    jurisdictions. ‘‘[W]hen technical issues are involved
    (issues beyond common knowledge and experience) in
    a [product] liability or a [product related] case, expert
    testimony is required to generate a jury issue. . . .
    Technical issues requiring expert testimony include
    engineering, metallurgical and medical principles. . . .
    When such principles are at issue in a design defect
    case, expert testimony is necessary to establish a rea-
    sonable alternative design and the ability of such design
    to reduce the foreseeable harm of the challenged prod-
    uct—that is to say, expert testimony may be needed
    to establish the elements of breach and causation.’’
    (Citations omitted; internal quotation marks omitted.)
    Farm Bureau Property & Casualty Ins. Co. v. CNH
    Industrial America, LLC, Docket No. C16-3122-LTS,
    
    2018 WL 2077727
    , *17 (N.D. Iowa February 5, 2018).
    Other jurisdictions have explained that, ‘‘[w]hen
    understanding the nature of the alleged defect requires
    knowledge . . . beyond that possessed by the average
    lay person . . . [the] law requires expert testimony to
    establish both the defect and the practical and techni-
    cally feasible alternative design.’’ (Internal quotation
    marks omitted.) Buck v. Ford Motor Co., Docket No.
    3:08CV998, 
    2012 WL 12887708
    , *3 (N.D. Ohio June 25,
    2012), aff’d, 
    526 Fed. Appx. 603
     (6th Cir. 2013); see,
    e.g., Hilaire v. DeWalt Industrial Tool Co., 
    54 F. Supp. 3d 223
    , 252 (E.D.N.Y. 2014) (‘‘New York law requires
    plaintiffs to use expert testimony as to the feasibility
    and efficacy of alternative designs in order to prove a
    design defect’’). Indeed, in another product liability case
    involving vaginal mesh products, the United States Dis-
    trict Court for the Southern District of Iowa explained
    that expert testimony was required on the issue of
    ‘‘whether an alternative safer design existed for a medi-
    cal device, which plainly involves medical principles.’’
    Willet v. Johnson & Johnson, 
    465 F. Supp. 3d 895
    , 905
    (S.D. Iowa 2020).
    Thus, as we have in other contexts, we conclude that
    expert testimony is required in a reasonable alternative
    design case when the evidence regarding the defect and
    whether the alternative was feasible (technically and
    economically) and whether the alternative would have
    reduced or avoided the risk of harm is beyond the ken
    of the average juror. See, e.g., LePage v. Horne, 
    262 Conn. 116
    , 125, 
    809 A.2d 505
     (2002) (‘‘[e]xpert testimony
    is required when the question involved goes beyond
    the field of the ordinary knowledge and experience of
    judges or jurors’’ (emphasis omitted; internal quotation
    marks omitted)). In the present case, the evidence
    regarding whether there was an alternative design to
    the Obtryx that would have reduced or avoided the
    risk of harm to Fajardo involved complicated medical
    principles. These medical principles included the mate-
    rial from which the products were made, how the differ-
    ent products were placed in the body, how each worked
    to treat the condition of stress urinary incontinence,
    how the products interacted with the human body when
    implanted, and the risks and potential side effects.
    Accordingly, in order to prove that Boston Scientific’s
    product was unreasonably dangerous under Bifolck 1,
    the plaintiffs were required to produce expert testimony
    on a reasonable alternative design.
    Here, the trial court determined that Rosenzweig
    ‘‘was [the plaintiffs’] product design expert.’’ The plain-
    tiffs agree that he was their design expert. In fact, in
    their brief to this court, the plaintiffs focus on Rosenz-
    weig and his testimony in other cases.12 Therefore, in
    evaluating the plaintiffs’ motion to set aside the verdict
    based on the failure of the trial court to give the Bifolck
    1 instruction, the trial court reviewed Rosenzweig’s tes-
    timony and the documentary evidence that came in
    through him.
    The trial court determined: ‘‘While [Rosenzweig] was
    critical of several design characteristics of the Obtryx
    product, he offered no reasonable alternative design of
    a mesh product that was available to [Boston Scientific]
    when the Obtryx [implanted] in [Fajardo] was pro-
    duced. The court rejects [the plaintiffs’] current sugges-
    tions [that] the jury might infer [that Rosenzweig]
    endorsed any polypropylene transvaginal mesh prod-
    uct, however designed or configured, as [Rosenzweig]
    . . . in this case . . . testified [that] transvaginal poly-
    propylene implants are defective and unreasonably dan-
    gerous because transvaginal polypropylene mesh prod-
    ucts provoke a foreign body rejection or reaction in
    women.’’ Indeed, Rosenzweig testified that, in his opin-
    ion, all vaginal slings made of polypropylene mesh are
    defective. He specifically testified that a TVT produced
    by Gynecare, which is part of the Ethicon division of
    Johnson & Johnson (Ethicon branded TVT), is defec-
    tive.
    We agree with the trial court that Rosenzweig was
    the only witness qualified to opine on reasonable alter-
    native design, and, therefore, the trial court properly
    focused on the testimony of Rosenzweig to determine
    whether the plaintiffs had produced sufficient evidence
    to warrant an instruction under the reasonable alterna-
    tive design prong. We do the same and, as explained
    more fully in this opinion, conclude that the evidence
    was not sufficient to warrant an instruction on reason-
    able alternative design.13
    D
    Framing of the Issue Presented
    In order to better understand the issue that is truly
    in dispute in this appeal, it is important to keep in mind
    that a plaintiff in Connecticut has two ways to establish
    that ‘‘a product is in a defective condition unreasonably
    dangerous to the consumer or user . . . .’’ Bifolck v.
    Philip Morris, Inc., supra, 
    324 Conn. 434
    . Those two
    ways are: ‘‘(1) A reasonable alternative design was avail-
    able that would have avoided or reduced the risk of
    harm and the absence of that alternative design renders
    the product unreasonably dangerous. . . . [O]r (2)
    [t]he product is a manifestly unreasonable design in
    that the risk of harm so clearly exceeds the product’s
    utility that a reasonable consumer, informed of those
    risks and utility, would not purchase the product.’’
    (Emphasis added.) 
    Id.,
     434–35. Therefore, in Connecti-
    cut, unlike in some states and in accordance with the
    position of the Restatement (Third) of Torts, Products
    Liability, proof of a reasonable alternative design is not
    necessary to prove that a product has a defective design.
    It is only one way of proving defective design.
    In the present case, the jury was instructed under
    the second theory of liability, namely, that the risk of
    harm from the Obtryx so clearly exceeded its utility
    that a reasonable consumer would not purchase it.
    Accordingly, although the concurring and dissenting
    opinion spends considerable energy laying out how the
    plaintiffs demonstrated that the Obtryx was defective,
    it is important to remember that the jury considered
    whether the product was defective insofar that it was
    a ‘‘manifestly unreasonable design in that the risk of
    harm so clearly exceeds the product’s utility . . . .’’
    
    Id., 435
    . Indeed, the jury was able to consider all of
    the evidence presented and ultimately found that the
    Obtryx was not defective under Bifolck 2.
    The issue on appeal is not whether the jury should
    have been able to consider the plaintiffs’ claims at all.
    Instead, the question is whether the plaintiffs intro-
    duced sufficient evidence that the Obtryx is defective
    because a reasonable alternative design was available
    that would have reduced or avoided the risk of harm
    to Fajardo and Boston Scientific’s failure to adopt that
    reasonable alternative design rendered the Obtryx
    unreasonably dangerous. In considering the plaintiffs’
    claim and the position of the concurrence and dissent,
    it is important to remember that ‘‘a manufacturer is not
    required to design the safest possible product or a safer
    product than the one it designed, so long as the design
    adopted was reasonably safe. The duty assumed by the
    manufacturer is to design the product for its intended
    use, namely, that use which could reasonably be fore-
    seen. Stated differently, a manufacturer has a duty to
    avoid placing on the market a product [that], because
    of its defective design, presents an unreasonable risk
    of harm to others.’’ (Footnotes omitted.) 6 S. Speiser
    et al., American Law of Torts (2010) § 18:73, pp. 180–81.
    Accordingly, in considering the plaintiffs’ claim, the
    issue is not whether the plaintiffs have produced suffi-
    cient evidence that the Obtryx had defects and that
    some of those defects may have caused Fajardo’s injur-
    ies, which is the claim under Bifolck 2 that the jury
    considered and rejected. Rather, the issue presented
    by this appeal is whether the plaintiffs introduced suffi-
    cient evidence that there was a reasonable alternative
    design available to Boston Scientific’s Obtryx and that
    Boston Scientific’s failure to use that alternative design
    rendered the Obtryx unreasonably dangerous.
    E
    Whether an Instruction on a Reasonable
    Alternative Design Was Warranted
    On appeal, the plaintiffs assert that Rosenzweig’s tes-
    timony, the Ross study, and other studies introduced
    into evidence established a reasonable alternative
    design to the Obtryx, namely, the TVT. To the extent
    that the plaintiffs assert that they presented sufficient
    evidence that the TVT is a reasonable alternative design
    to the Obtryx, it appears—from the evidence on which
    they rely—that they must be referring to the class of
    tension free vaginal tape that is implanted in a retropu-
    bic fashion.14 First, Rosenzweig does not compare the
    Obtryx to the Ethicon branded TVT. Second, the Ross
    study did not compare the Obtryx to the Ethicon
    branded TVT but compared the Obtryx to another retro-
    pubic sling manufactured by Boston Scientific. Third,
    the other studies entered into evidence did not compare
    the Obtryx device to the Ethicon branded TVT.15 Finally,
    despite the efforts of the concurrence and dissent; see
    part III A 1 and footnote 22 of the concurring and dis-
    senting opinion; Bercik did not compare the Ethicon
    branded TVT to the Obtryx; he notes only that he and
    a few other physicians with whom he works prefer the
    Ethicon branded TVT to other slings but that one of
    his superiors in his working group at Yale School of
    Medicine still uses the Obtryx.16
    The class of TVTs cannot, however, be a reasonable
    alternative design that would have reduced or avoided
    the risk of harm to Fajardo. Specifically, the evidence
    in the record demonstrates that products that belong
    to the class of TVTs can be made of many different
    types of mesh material of various pore sizes and dif-
    fering weights and that those design differences can
    alter performance and safety. Therefore, the plaintiffs’
    repeated reference to TVT does not constitute identifi-
    cation of a reasonable alternative design when the
    safety data related to that class of products vary consid-
    erably. By referring to the class of TVTs when some
    products within that class suffer from the same alleged
    defects as the Obtryx—a point we will elaborate on
    shortly—the plaintiffs failed to produce sufficient evi-
    dence of a reasonable alternative design that would
    have reduced or avoided the risk of harm to Fajardo.
    A review of Rosenzweig’s testimony reveals that he
    testified regarding defects in the Obtryx. First, he
    explained that, in his opinion, all slings made with poly-
    propylene mesh are defective. Rosenzweig explained
    that the use of that type of mesh caused a foreign body
    reaction in Fajardo and contributed to the cause of her
    injuries. The Obtryx is made of polypropolyene mesh,
    but so, too, is the Ethicon TVT.
    Second, Rosenzweig testified that the mesh used in
    the Obtryx had a detanged or heat-sealed edge and that
    it made the mesh stiffer in the area that had been sealed.
    Rosenzweig explained: ‘‘When you seal the edge of the
    mesh, you increase the stiffness of the mesh. . . . But,
    what scientists have shown is that stiffness of mesh is
    a bad property. It increases the foreign body reaction
    . . . the inflammatory reaction, the amount of scarring,
    and all the sequelae that we’re going to continue to talk
    about . . . .’’ Rosenzweig was later asked: ‘‘Earlier, you
    described some problems with the detanging or the
    heat sealing of the center portion of the . . . Obtryx
    sling. Does that detanging add any benefit that would
    outweigh the added risks . . . from the stiffness?’’
    Rosenzweig responded, ‘‘[n]o.’’17
    To the extent that the plaintiffs are claiming that the
    class of TVTs is a reasonable alternative design that
    would have reduced or avoided the risk of harm to
    Fajardo, this testimony does not support the plaintiffs’
    claims. First, there was evidence that other products
    within the class of TVTs are made of the exact same
    mesh as the Obtryx, and those products have the same
    heat seal and detanging. Rosenzweig testified that the
    Advantage sling has the ‘‘same heat-sealed center.’’ The
    plaintiffs did not demonstrate how a TVT product with
    the same allegedly defective material and heat sealing
    as the Obtryx would have reduced or avoided the risk
    of harm to Fajardo. Second, even if the plaintiffs estab-
    lished that other TVTs do not have the heat seal and
    detanging, that does not prove that the use of that other
    product would have reduced or avoided the risk of
    harm to Fajardo. In fact, the plaintiffs’ product design
    expert testified that all vaginal slings made of polypro-
    pylene mesh are defective and unreasonably dangerous.
    Even more to the point, Rosenzweig admitted that he
    considered the Ethicon branded TVT defective for
    that reason.
    Nevertheless, the plaintiffs also rely heavily on the
    Ross study in support of their claim that the class of
    products known as TVTs is a reasonable alternative
    design to the Obtryx. It cannot be emphasized enough
    that the Ross study does not address the Ethicon
    branded TVT at all. Instead, it compared two products
    made by Boston Scientific—the Obtryx and the Advan-
    tage branded TVT. See S. Ross et al., 
    supra,
     114 Obstet-
    rics & Gynecology 1288. Therefore, the plaintiffs’ reli-
    ance on that study undermines the claim of the
    concurrence and dissent that the plaintiffs pointed to
    the Ethicon branded TVT as a reasonable alternative
    design.
    Furthermore, the Ross study does not even support
    the plaintiffs’ claim that the class of TVTs was a reason-
    able alternative design to the Obtryx that would have
    reduced or avoided the risk of harm to Fajardo. Specifi-
    cally, there was evidence at trial that the Obtryx and
    the Advantage branded TVT are made of the exact same
    mesh material. In explaining the Ross study, Rosenz-
    weig stated: ‘‘This is a study that was done and pub-
    lished in 2009. It’s a randomized control trial comparing
    the Obtryx sling made of Advantage mesh with the
    Advantage sling that goes behind the pubic bone, also
    made of Advantage mesh.’’ Rosenzweig also testified
    that the Advantage sling is made of the exact same
    material as the Obtryx, including the heat seal. Because
    Rosenzweig identified the heat seal in the mesh that is
    used in the Obtryx as one of the primary defects that
    caused Fajardo’s injury, a study that compared two
    products made of the same mesh with the same heat
    seal does not support the plaintiffs’ claim that there
    was a reasonable alternative design that would have
    reduced or avoided the risk of harm to Fajardo.
    The only difference between the two devices com-
    pared in the Ross study was their placement in the
    body. The Advantage sling was designed to be placed
    in a retropubic fashion, meaning behind the pubic bone.
    The Obtryx, on the other hand, was designed to be
    placed using a transobturator approach. See S. Ross et
    al., 
    supra,
     114 Obstetrics & Gynecology 1287. Rosenz-
    weig did not testify that the risk of harm to Fajardo
    would have been reduced or avoided if a retropubic
    sling was used. Instead, Rosenzweig identified only the
    polypropylene mesh and the heat seal as the defects
    that caused Fajardo’s injuries. Accordingly, contrary to
    the plaintiffs’ position, the Ross study did not support
    their request for a reasonable alternative design instruc-
    tion.
    Furthermore, even if the plaintiffs were able to make
    a claim of reasonable alternative design by pointing to
    a class of products, it is important to note that Rosenz-
    weig testified that, in his opinion, all mesh products
    fabricated from polypropylene, including the Ethicon
    branded TVT, as well as other products within the class
    of TVTs, are unsafe and unsuitable for implantation in
    the human body. Rosenzweig’s testimony was that any
    vaginal sling made of polypropylene mesh is defective
    and not reasonably safe, and that the Burch procedure,
    a surgical option, was the best approach to treat stress
    urinary incontinence.18
    As the Fifth Circuit has explained, ‘‘[a] design is not
    a safer alternative if, under other circumstances, [it
    would] impose an equal or greater risk of harm than
    the design at issue. . . . Similarly, the plaintiff must
    show the safety benefits from [the] proposed design
    are foreseeably greater than the resulting costs, includ-
    ing any diminished usefulness or diminished safety.’’
    (Citation omitted; emphasis omitted.) Casey v. Toyota
    Motor Engineering & Mfg. North America, Inc., 
    770 F.3d 322
    , 331 (5th Cir. 2014). Accordingly, we cannot
    conclude that the plaintiffs produced sufficient evi-
    dence to warrant an instruction that the class of TVTs
    constitutes a reasonable alternative design.
    We agree with the concurrence and dissent that point-
    ing to an existing product that has been successfully
    commercialized can serve as evidence of the feasibility
    of an alternative design; see part II A 1 of the concurring
    and dissenting opinion; but we simply find that proposi-
    tion inapplicable to the present case.
    To put it simply, that is just not the way that the
    plaintiffs tried this case. The plaintiffs did not produce
    sufficient facts to support a reasonable alternative
    design claim. Namely, the plaintiffs did not point to a
    specific existing product on the market and demon-
    strate that its use would have reduced or avoided the
    risk of harm to Fajardo. At best, the plaintiffs took a
    scattershot approach, pointing to different alternatives
    to the Obtryx that included surgical options and a class
    of products known as TVTs. Specifically, the plaintiffs’
    product design expert recommended a surgical alterna-
    tive known as the Burch procedure, the Ross study
    compared the Obtryx to an entirely different product,
    the Advantage tape, another study compared transobt-
    urator slings like the Obtryx to retropubic slings (the
    class of products known as the TVT), and another study
    compared mesh used in products within the class of
    TVTs to the mesh used in the Ethicon branded TVT.
    The evidence did not, however, demonstrate that any
    particular product was safer or, most important, would
    have reduced or avoided the risk of harm to Fajardo
    when compared to the Obtryx.
    We recognize that the commentary to the
    Restatement (Third) provides that ‘‘other products
    already available on the market may serve the same or
    very similar function at lower risk and at comparable
    cost. Such products may serve as reasonable alterna-
    tives to the product in question.’’ Restatement (Third),
    Torts, Products Liability § 2, comment (f), p. 24 (1998);
    see part II A 1 of the concurring and dissenting opinion.
    This court, however, has not adopted the Restatement
    (Third). See Bifolck v. Philip Morris, Inc., supra, 
    324 Conn. 431
     (‘‘the defendant’s arguments have not per-
    suaded us that we should adopt the Restatement (Third)
    at this time’’).
    Although we have not expressly adopted the
    Restatement (Third), it does inform our analysis in the
    present case. Even if this court had adopted the
    Restatement (Third), and if we agreed with the concur-
    rence and dissent that the plaintiffs pointed to a single
    product on the market as a reasonable alternative—
    namely, the Ethicon branded TVT—pointing to a prod-
    uct on the market alone would not have satisfied the
    plaintiffs’ burden in this case. Although pointing to a
    product on the market with an alternative design may
    demonstrate that the alternative design is feasible, it
    does not by itself establish that the alternative design
    would have reduced or avoided the harm to Fajardo.
    See, e.g., Bic Pen Corp. v. Carter, 
    171 S.W.3d 657
    , 671–72
    (Tex. App. 2005) (not requiring expert testimony based
    on counsel’s concession but reviewing safety data intro-
    duced into evidence to determine whether products on
    market were reasonable alternative design that would
    have avoided injury), rev’d on other grounds, 
    251 S.W.3d 500
     (Tex. 2008). The plaintiffs still needed to produce
    sufficient evidence to demonstrate that, if Boston Scien-
    tific had adopted the design of the Ethicon branded
    TVT, it would have reduced or avoided the risk of harm
    to Fajardo.
    To the extent that there was information regarding
    the safety data of the TVT, that evidence was that there
    were risks and complications with the use of the TVT.
    For example, one study explained that ‘‘one of the pri-
    mary problems in using the TVT is that as a result of its
    low stiffness, the mesh easily deforms when tensioning
    under the urethra. Specifically, pulling the sling gently
    results in thinning of the mesh (permanent deforma-
    tion) and fraying at the tanged edges. Consequently,
    various companies have modified polypropylene sling
    meshes for easier placement by heat sealing the mid-
    portion of the sling that lays under the urethra . . . .’’
    P. Moalli et al., ‘‘Tensile Properties of Five Commonly
    Used Mid-Urethral Slings Relative to the TVT,’’ 19 Inter-
    national Urogynecology J. 655, 656 (2008) (Moalli
    study). Another study explained the complications from
    the TVT to ‘‘include bladder perforation, excessive
    blood loss, urinary retention, pelvic hematoma, and
    suprapubic wound infection. Later complications
    include exacerbation of existing or development of de
    novo overactive bladder, persistent suprapubic discom-
    fort, and vaginal mesh erosion. Rare complications,
    such as bowel injuries and female sexual dysfunction,
    have been reported.’’ H. Cholhan et al., ‘‘Dyspareunia
    Associated with Paraurethral Banding in the Transobt-
    urator Sling,’’ 202 Am. J. Obstetrics & Gynecology
    481.e1, 481.e1 (2010) (Cholhan study). The authors of
    the Ross study also explained that ‘‘the most common
    perioperative complications associated with TVT were
    bladder perforation and bleeding’’; S. Ross et al., supra,
    114 Obstetrics & Gynecology 1291; and that ‘‘[c]oncern
    about complications associated with TVT led in 2001
    to the development of another minimally invasive pro-
    cedure using the transobturator tape.’’ (Footnotes omit-
    ted.) Id., 1287–88.19 Contrary to the assertions of the
    concurrence and dissent; see part II A 2 of the concur-
    ring and dissenting opinion; we do not conclude that
    the plaintiffs had to point to a risk free product on
    the market to allow the jury to find that there was a
    reasonable alternative design for the Obtryx. Neverthe-
    less, the plaintiffs did have to produce evidence that
    the other product on the market would have reduced
    the risk of harm to Fajardo.
    Furthermore, because this case involves complex
    medical devices with complicated medical risks and
    injuries, evidence comparing their relative safety data
    would have had to come from an expert qualified to
    testify regarding the designs of the Ethicon branded
    TVT and the Obtryx, and qualified to explain how use
    of the Ethicon branded TVT would have reduced or
    avoided the risk of harm to Fajardo.20 In discussing
    whether expert testimony was required for a reasonable
    alternative design in another case involving a pelvic
    mesh product, the United States District Court for the
    Southern District of Iowa explained: ‘‘Whether expert
    testimony is required ultimately depends on whether it
    is a fact issue [on] which the jury needs assistance to
    reach an intelligent or correct decision. . . . Although
    Iowa law does not appear to require expert testimony
    for recovery in a [product] liability action, the plaintiff
    must supply sufficient evidence to satisfy the trial court
    that the jury, with its common knowledge, could reason-
    ably find an alternative design to be practicable and
    feasible. . . . Technical issues requiring expert testi-
    mony include engineering, metallurgical and medical
    principles. . . . When such principles are at issue in a
    design defect case, expert testimony is necessary to
    establish a reasonable alternative design and the ability
    of such design to reduce the foreseeable harm of the
    challenged product—that is to say, expert testimony
    may be needed to establish the elements of breach
    and causation. . . . Also, [e]xpert testimony regarding
    reasonable alternative designs is subject to the same
    standard as any other expert testimony. . . . Here, the
    issue is whether an alternative safer design existed
    for a medical device, which plainly involves medical
    principles. . . . Indeed, this is a case well outside the
    common experience of jurors, such as a stuffed toy
    with hard plastic buttons, because it involves more
    technical and scientific issues.’’ (Citations omitted;
    emphasis added; internal quotation marks omitted.)
    Willet v. Johnson & Johnson, supra, 
    465 F. Supp. 3d 905
    . We conclude that, under Connecticut law, the issue
    of whether one particular vaginal mesh sling on the
    market would reduce or avoid the risk of harm is an
    issue on which the jury needed assistance to reach an
    intelligent decision.21 Therefore, we agree with the trial
    court that the plaintiffs’ failure to produce such expert
    testimony on that issue was fatal to the plaintiffs’ claim
    under the reasonable alternative design theory of
    Bifolck 1.
    To be sure, the Restatement (Third) also makes clear
    that ‘‘[i]t is not sufficient that the alternative design
    would have reduced or prevented the harm suffered by
    the plaintiff if it would also have introduced into the
    product other dangers of equal or greater magnitude.’’
    Restatement (Third), supra, § 2, comment (f), p. 23.
    Rosenzweig testified that a substantial contributing fac-
    tor of Fajardo’s injuries was the fact that she experi-
    enced a foreign body reaction to the Obtryx. Rosenz-
    weig explained that polypropylene mesh slings can
    cause this type of reaction. Accordingly, Rosenzweig
    opined that all polypropylene mesh slings are defective
    and unreasonably dangerous. He specifically opined
    that the Ethicon branded TVT, which is made of poly-
    propylene mesh, was defective. Given this testimony
    from the plaintiffs’ product design expert, we cannot
    see how the plaintiffs could have successfully claimed
    that the Ethicon branded TVT or the class of TVTs was
    a reasonable alternative design that would have reduced
    or avoided the harm suffered by Fajardo. Therefore,
    the trial court was correct not to instruct the jury on
    the reasonable alternative design prong.
    Even if we were to consider Bercik’s testimony as
    expert testimony on reasonable alternative design, as
    the concurrence and dissent suggests; see, e.g., footnote
    6 of the concurring and dissenting opinion; we cannot
    conclude that it supports the plaintiffs’ request for a
    reasonable alternative design instruction. First, Bercik’s
    testimony was not based on sufficient data to comment
    on reasonable alternative design. Bercik never estab-
    lished his qualifications regarding product design and
    testified that he was unaware of a key design element
    of the Ethicon branded TVT, namely, the type of mesh
    used in the product.22 Furthermore, the fact that Bercik
    testified that he prefers the Ethicon branded TVT does
    not support a reasonable finding that it would have
    reduced or avoided the risk of harm to Fajardo. Beside
    knowing next to nothing about the design features of
    the Obtryx, and not remembering why he stopped using
    it, he also admitted that, although his preference is
    for the Ethicon branded TVT, his supervisor uses the
    Obtryx. Thus, in his testimony, he acknowledged his
    preference for the Ethicon branded TVT, but that testi-
    mony does not establish that it is a reasonable alterna-
    tive design to the Obtryx that would have reduced or
    avoided the risk of harm to Fajardo.23
    We do not agree with the concurrence and dissent
    that other studies and documents that were entered
    into evidence were sufficient to support a reasonable
    alternative design claim.24 See parts II A 1 and 2 of
    the concurring and dissenting opinion. At most, these
    studies demonstrate that the Ethicon branded TVT was
    the first tension free vaginal tape manufactured, and
    for that reason, there is more data evaluating its safety
    and effectiveness. Nevertheless, the evidence in the
    studies demonstrate that, ‘‘[a]lthough the [Ethicon
    branded] TVT was the first [midurethral] sling to gain
    widespread acceptance, numerous other [midurethral]
    sling systems have subsequently been introduced. While
    all of the meshes consist of a knitted polypropylene
    material, they have been altered as a marketing strategy
    to overcome [clinician perceived] deficiencies in the
    [Ethicon branded] TVT.’’ P. Moalli et al., supra, 19 Inter-
    national Urogynecology J. 655.
    Furthermore, also contrary to the representations of
    the concurrence and dissent, the evidence did not dem-
    onstrate that the class of TVTs or the Ethicon branded
    TVT is the ‘‘gold standard’’ to treat stress urinary incon-
    tinence. Part II A 1 of the concurring and dissenting
    opinion. The concurrence and dissent asserts that,
    ‘‘although the majority steadfastly resists this fact,
    expert witnesses and evidence from scholarly journals
    on which those witnesses relied repeatedly identified
    the TVT as the ‘gold standard,’ [and/or] ‘the standard
    of care’ . . . .’’ Id. However, no expert in the present
    case pointed to the TVT (either the Ethicon branded
    TVT or the class of products known as the TVT) as the
    ‘‘gold standard.’’ Thus, no one explained what is meant
    by the term. Instead, the design expert in the present
    case testified that all slings made of polypropylene mesh
    are unreasonably dangerous and that a surgical proce-
    dure is the best method for treating stress urinary incon-
    tinence.25
    In the present case, the plaintiffs simply did not intro-
    duce sufficient evidence to warrant an instruction on
    a reasonable alternative design. We find a recent case
    from the United States District Court for the District
    of Connecticut instructive in this regard. In granting
    a manufacturer’s motion for summary judgment on a
    reasonable alternative design claim, the court explained
    that the plaintiff ‘‘has not established that a reasonable
    alternative [water treatment] pump design was avail-
    able. [The expert’s] report, even if admitted, does not
    identify a reasonable alternative. Rather, [the expert’s]
    report opines that [the plaintiff] should have used [the
    competitor’s] pumps, which have larger motors. How-
    ever, the [competitor’s] motors would have required an
    expensive reworking of the system as a whole, and
    were considered and rejected by [the plaintiff] during
    the bidding process. . . . [The plaintiff] has offered no
    evidence that a ‘reasonable alternative design was avail-
    able’ for pumps that would meet the [plaintiff’s] system
    specifications ‘that would have avoided or reduced the
    risk of harm’ without ‘unreasonably increasing cost.’ ’’
    (Citation omitted.) Water Pollution Control Authority
    v. Flowserve US, Inc., supra, 
    2018 WL 1525709
    , *25.
    Similarly, the plaintiffs in the present case did not
    produce sufficient evidence that an alternative design
    was available that would have met Fajardo’s needs and
    have avoided or reduced the risk of harm without unrea-
    sonably increasing cost. To the contrary, evidence pre-
    sented at trial showed that the class of TVTs had varying
    degrees of safety, depending on the type of material
    that was used to make them, and some even had the
    exact same defect alleged to have caused Fajardo’s
    injuries in this case. Furthermore, the plaintiffs’ expert
    testified that all polypropylene mesh slings are defec-
    tive, including the Ethicon branded TVT. Accordingly,
    we cannot conclude that the trial court incorrectly
    determined that the plaintiffs did not produce sufficient
    evidence of a reasonable alternative design that would
    have avoided injuries to Fajardo to warrant an instruc-
    tion on reasonable alternative design.
    The plaintiffs cite to Campbell v. Boston Scientific
    Corp., 
    882 F.3d 70
     (4th Cir. 2018), in support of their
    claim that there was sufficient evidence in the present
    case to warrant an instruction on the reasonable alter-
    native design prong. We disagree. In that case, the
    defendant claimed that there was insufficient evidence
    to support the jury verdict and, specifically, to show
    that there was a safer alternative design. See id., 79.
    Based on the trial record and the expert’s testimony in
    that case, the Fourth Circuit concluded that there was
    sufficient evidence to support the safer alternative
    design claim. As one example of evidence that sup-
    ported the plaintiffs’ claim in that case, the court
    pointed to the expert’s testimony regarding the Ross
    study. See id. The Fourth Circuit’s conclusion that,
    based on the particular safer alternative design claim
    made by the plaintiffs in that case and supported by
    evidence, the Ross study supported the safer alternative
    design claim.
    The Fourth Circuit’s conclusion, however, does not
    mean that the Ross study will always support a reason-
    able alternative design claim. In the present case, the
    Ross study does not support the plaintiffs’ claim that
    there is a reasonable alternative design, particularly
    because the plaintiffs claimed and their expert testified
    that the heat-sealed mesh used in the Obtryx caused
    Fajardo’s injuries. Because the Ross study compared
    two slings made of the exact same heat-sealed mesh,
    that study is not evidence of a reasonable alternative
    design, in light of the claim that was presented by the
    plaintiffs in this case.
    Based on the foregoing, we conclude that the plain-
    tiffs did not produce sufficient evidence to warrant an
    instruction on a reasonable alternative design. Accord-
    ingly, we conclude that the trial court properly declined
    their request for such an instruction.
    The judgment is affirmed.
    In this opinion ROBINSON, C. J., and PALMER,
    D’AURIA and KAHN, Js., concurred.
    * The listing of justices reflects their seniority status on this court as of
    the date of oral argument.
    * December 16, 2021, the date that this decision was released as a slip
    opinion, is the operative date for all substantive and procedural purposes.
    1
    Fajardo’s husband, Jairo Fajardo, is also a plaintiff. We need not sepa-
    rately address his derivative claims for loss of consortium, insofar as they
    rise or fall with Fajardo’s claims.
    2
    The terms ‘‘mesh sling,’’ ‘‘tape,’’ and ‘‘sling’’ are used interchangeably in
    this opinion.
    3
    Stress urinary incontinence is defined as the ‘‘leakage of urine as a
    result of coughing, straining, or some sudden voluntary movement, due to
    incompetence of the sphincteric mechanisms.’’ Stedman’s Medical Diction-
    ary (28th Ed. 2006) p. 962.
    4
    The midurethral sling is a narrow strap made of synthetic mesh or native
    tissue that is placed under the urethra. It acts as a hammock to lift or to
    support the urethra and the neck of the bladder.
    5
    The plaintiffs withdrew their complaint against another defendant,
    Bridgeport Hospital.
    6
    The plaintiffs appealed to the Appellate Court, and we transferred the
    appeal to this court pursuant to General Statutes § 51-199 (c) and Practice
    Book § 65-1.
    7
    Colporrhaphy is surgical repair of the vaginal wall. An anterior colporrha-
    phy treats a cystocele or urethrocele (prolapse of the urethra into the vagina),
    whereas a posterior colporrhaphy treats a rectocele.
    8
    The plaintiffs cite to cases from other jurisdictions that have concluded
    that a referring physician owes a duty to obtain a patient’s informed consent
    when the referring physician maintains control over the procedure per-
    formed. See, e.g., O’Neal v. Hammer, 
    87 Haw. 183
    , 187, 
    953 P.2d 561
     (1998).
    Because we conclude that the plaintiffs did not produce sufficient evidence
    for the jury to conclude that Jacobs maintained control over Fajardo’s vaginal
    mesh procedure, we need not address these cases from other jurisdictions.
    9
    The record demonstrates that the term ‘‘TVT’’ is used both with respect
    to the Ethicon branded tension free vaginal tape (the specific TVT type
    product the plaintiff identified in her complaint) and as a generic term for
    similar tension free vaginal tapes in the class of TVT products, such as
    Boston Scientific’s Advantage tape. Unless otherwise noted, we use the term
    in that broader, generic context. Although the plaintiffs juxtaposed the
    Obtryx to the class of TVT products generally, they did not focus on a
    particular TVT product with which to compare the Obtryx and, most
    important, did not demonstrate how another specific product without the
    alleged defects of the Obtryx would have avoided her injuries, a point we
    discuss in more detail subsequently in this opinion. See parts II C through
    E of this opinion.
    10
    Counsel for the plaintiffs submitted the following request by e-mail:
    ‘‘In further response to [the defendants’] prior comments [the] [p]laintiffs
    contend that both consumer expectation and risk utility . . . of Bifolck are
    all applicable.’’
    11
    The court charged the jury in relevant part: ‘‘The plaintiff[s] [claim] the
    Obtryx was defectively designed. In order to prove that a product was
    defective, the plaintiff[s] must prove the condition [they] claimed to be a
    defect made the product unreasonably dangerous. A product is in a defective
    condition unreasonably dangerous to the consumer or user if the design of
    the product [was] so manifestly unreasonable in that the risk of harm so
    clearly exceeds the product’s utility that a reasonable consumer, informed
    of those risks and utility, would not purchase the product.’’
    12
    The plaintiffs do not rely on Bercik, whom the concurrence and dissent
    is forced to rely on to support its position. It is not surprising that the
    plaintiffs do not rely on Bercik because, as we explain subsequently in this
    opinion; see footnote 23 of this opinion and accompanying text; Bercik did
    not testify about the design of the Obtryx or its defects; he merely explained
    that he had implanted the Obtryx once or twice but usually implants the
    Ethicon branded TVT. He gave no opinion on whether use of the Ethicon
    branded TVT would have reduced or avoided the risk of harm to Fajardo.
    13
    Although the ultimate determination of whether the facts supported the
    instruction is a legal question subject to plenary review, the facts underpin-
    ning that determination will not be overturned in the absence of a finding
    that they were clearly erroneous. In the present case, the trial court deter-
    mined that Rosenzweig was the plaintiffs’ product design expert, and the
    plaintiffs do not challenge that finding, let alone assert that it is clearly
    erroneous. The trial court further found that Rosenzweig’s testimony was
    that all polypropylene mesh slings are defective and unreasonably dangerous
    and that the Burch procedure, which is a surgical repair, was his preferred
    method. The plaintiffs do not challenge these findings by the trial court as
    clearly erroneous, and the concurrence and dissent does not find them to
    be unsupported by the evidence. In fact, instead of addressing why the trial
    court’s findings are clearly erroneous, the concurrence and dissent ignores
    them and engages in its own fact-finding. At no point did Rosenzweig opine
    that use of the Ethicon branded TVT or any other TVT product would have
    reduced or avoided Fajardo’s injuries.
    14
    The concurrence and dissent asserts that it is an ‘‘erroneous assumption’’
    that, to the extent that the plaintiffs referred to the TVT, it was the class
    of retropubic slings rather than the Ethicon branded TVT. Part III A of the
    concurring and dissenting opinion. That claim is belied by the record. Indeed,
    a review of the plaintiffs’ memorandum in support of their motion for a
    new trial reveals that the plaintiffs never once identified the Ethicon branded
    TVT as the reasonable alternative design for which they had presented
    sufficient evidence to support a charge. Instead, in their memorandum in
    support of the motion, the plaintiffs cited to ‘‘safer alternatives’’ to the
    Obtryx, including the Burch procedure. Even in their brief to this court, the
    plaintiffs again referred to ‘‘safer alternatives’’ and the Burch procedure,
    and, for the first time, mentioned ‘‘TVT’’ as one of the safer alternatives
    without indicating whether it was the Ethicon branded TVT.
    Furthermore, Boston Scientific’s brief to this court demonstrates that it
    also understood the plaintiffs to be claiming that the class of TVTs was a
    reasonable alternative design. Boston Scientific argues specifically in its
    brief: ‘‘Without naming a specific product, the plaintiffs argue that other
    polypropylene slings, presumably without detanged portions, are reasonable
    alternative designs to the Obtryx.’’ Boston Scientific further asserted that
    ‘‘the plaintiffs never identified at trial any specific alternative design [that]
    they claim [Boston Scientific] should have used with the Obtryx.’’ (Emphasis
    omitted.) Boston Scientific also explained that ‘‘[t]he plaintiffs’ posttrial
    reliance on a single clinical study for the proposition that other polypropyl-
    ene slings constitute reasonable alternative designs is inconsistent with the
    evidence presented by the plaintiffs at trial.’’
    15
    Although the Moalli study compared the tensile property of the mesh
    used in five other devices (including the mesh used in the Obtryx) to the
    mesh used in the Ethicon branded TVT, it did not compare how the Obtryx
    performed in the human body to how the Ethicon branded TVT performed
    in the human body; nor did it compare the risks of harm from the two
    devices. See P. Moalli et al., ‘‘Tensile Properties of Five Commonly Used
    Mid-Urethral Slings Relative to the TVT,’’ 19 International Urogynecology
    J. 655, 663 (2008) (‘‘Although it is important to understand the behavior of
    a sling before implantation, the behavior of these slings in vivo and after
    incorporation into host tissue may be inferred, but is not directly apparent
    from these studies. Indeed, the next logical step to the current study is the
    implementation of rigorous in vivo studies to determine how the textile and
    tensile properties of polypropylene slings relate to tissue behavior, efficacy,
    patient morbidity, and patient satisfaction.’’).
    16
    The concurrence and dissent asserts that Bercik ‘‘testified that Fajardo
    could have been a candidate for the TVT, that the Obtryx was the cause of
    her injuries, and that he had begun using the TVT in favor of transobturator
    slings, including the Obtryx, because of his negative experience with the
    latter.’’ Footnote 17 of the concurring and dissenting opinion. Bercik actually
    testified that, at the time Farjado came to see him in 2014 when she was
    experiencing pain from the Obtryx, he recommended that she could poten-
    tially benefit from the TVT. Bercik explained that he recommended the TVT
    at that time because the transobturator sling procedure had not worked,
    so he would not try that again. This clearly is not testimony suggesting that
    the TVT was safer or a more reasonable alternative and should have been
    used in 2010 when Fajardo had the Obtryx implanted, as the concurrence
    and dissent suggests.
    Similarly, Brian Hines, a urogynecologist who did not testify at the trial
    in the present case, also saw Fajardo after she was having pain from the
    Obtryx. A review of his notes from that appointment, which were an exhibit
    at the trial, reveals that Hines suggested the TVT as an option for Fajardo
    after she had already tried the Obtryx, but he also notified her that it had
    many of the same risks of injury that she experienced with the Obtryx and
    that further testing was required to determine if she would be a good
    candidate for this procedure. Again, Hines did not opine on whether the
    TVT should have been used at the time of Fajardo’s original surgery, only
    that, after she already had issues with the Obtryx, the TVT could possibly
    be an alternative. Accordingly, we disagree with the concurrence and dissent
    that ‘‘[t]his evidence would have permitted the jury to conclude not only
    that the TVT is, in general, a viable alternative to the Obtryx . . . but also
    that it was well suited to Fajardo’s individual needs.’’ Part II A 1 of the
    concurring and dissenting opinion.
    17
    Rosenzweig never testified that a particular TVT would have been a
    reasonable alternative design. At most, Rosenzweig testified that ‘‘the data
    [are] limited but [show] that . . . for [the] Obtryx and the Advantage mesh
    . . . it’s inferior to the other slings that are on the market.’’
    18
    To the extent that the plaintiffs’ claim may be understood to be that
    the surgical procedure testified to by Rosenzweig constitutes a reasonable
    alternative design, we agree with the courts that have considered this issue
    and concluded that a surgery is not a reasonable alternative design to a
    particular product. See, e.g., Mullins v. Johnson & Johnson, 
    236 F. Supp. 3d 940
    , 943 (S.D. W. Va. 2017) (‘‘[e]vidence that a surgical procedure should
    have been used in place of a device is not an alternative, feasible design in
    relation to the TVT’’).
    19
    The authors of the Ross study also explained that ‘‘[t]wo systematic
    reviews have examined the evidence on effectiveness of transobturator tape
    compared with TVT, without finding clear differences in outcome. Objective
    cure [rates] after transobturator tape ranged from 84 [percent] to 98 [per-
    cent]; for TVT it ranged from 86 [percent] to 99 [percent]. The objective
    cure rates in [the Ross] study (81 [percent] for transobturator tape, 77
    [percent] for TVT) appear lower than those previously reported, but the
    difference is likely because [the Ross study’s] follow-up and definition of
    objective cure was very rigorous.’’ S. Ross et al., supra, 114 Obstetrics &
    Gynecology 1291.
    20
    In the present case, the concurrence and dissent asserts that the plain-
    tiffs produced sufficient evidence for the jury to consider their claim that
    the Ethicon branded TVT was a reasonable alternative design to the Obtryx.
    The basic premise underlying that position is that the evidence at trial
    established that the Ethicon branded TVT is the ‘‘gold standard’’ to treat
    stress urinary incontinence, that the Obtryx differed from the Ethicon
    branded TVT in three ways, and that those three design differences rendered
    the Obtryx unreasonably dangerous. We disagree with the position of the
    concurrence and dissent in three fundamental ways.
    First, despite the repeated protestations of the concurrence and dissent,
    the evidence in the record did not establish that the Ethicon branded TVT
    is the ‘‘gold standard’’ to treat stress urinary incontinence. See, e.g., part II
    A 1 of the concurring and dissenting opinion. To the contrary, the one
    product design expert who testified at trial testified that a surgical procedure,
    not the Ethicon branded TVT, was the best method to treat stress urinary
    incontinence. The product design expert also testified that all products made
    of polypropylene mesh are defective, including the Ethicon branded TVT.
    Furthermore, as we discuss subsequently in this opinion, there was evidence
    in the studies introduced at trial that, although the Ethicon branded TVT
    may have been the first such product on the market, it had several deficienc-
    ies that caused manufacturers to create alternatives. What the plaintiffs’
    expert never did was testify that the design of the Ethicon branded TVT
    would have entailed less risk of harm to Fajardo and, thus, would not have
    caused greater or equal injury. At best, the plaintiffs’ expert testified that
    the Obtryx had three alleged defects, but we do not learn from Rosenzweig
    or any other expert how or whether the Ethicon branded TVT would have
    reduced or avoided the risk of harm to Fajardo.
    Second, the concurrence and dissent acknowledges that the one product
    design expert who testified did not identify the Ethicon branded TVT as a
    reasonable alternative design to the Obtryx. Nevertheless, while acknowledg-
    ing that expert testimony on reasonable alternative design is required in
    this case, the concurrence and dissent asserts that any evidence that the
    product design expert did not provide is supplemented by other evidence
    in the case, including circumstantial evidence. We disagree.
    The question of whether there was a reasonable alternative design avail-
    able for the Obtryx involved complex medical principles, and the jury needed
    qualified expert testimony about each element of the prima facie case of
    reasonable alternative design. Courts have repeatedly explained that ‘‘[a]ny
    decision [that] pertains to the design of the device involves engineering,
    metallurgical and medical principles beyond common knowledge and experi-
    ence. Whether the device had a design defect, whether the foreseeable risks
    of harm the device posed could have been reduced or avoided by the
    adoption of a reasonable alternative design and whether the omission of
    such design rendered the device not reasonably safe are technical, scientific
    issues that cannot be fully understood by the average juror without some
    expert assistance.’’ Benedict v. Zimmer, Inc., 
    405 F. Supp. 2d 1026
    , 1033
    (N.D. Iowa 2005); see also Neilson v. Whirlpool Corp., Docket No. 3:10-cv-
    00140-JAJ-RAW, 
    2012 WL 13018693
    , *11 (S.D. Iowa January 3, 2012) (‘‘An
    average juror has no understanding as to the actual design of the Whirlpool
    washer or any alternative designs [that] might reduce the risk of foreseeable
    harm. This is the exact type of case in which a ‘jury needs assistance to
    reach an intelligent or correct decision. . . . Design defect cases sometimes
    involve technical, scientific issues [that] cannot be fully understood by the
    average juror without some expert assistance.’ ’’). If we adopt the position
    of the concurrence and dissent and allow other nonexpert testimony to fill
    in gaps left by the qualified expert in this type of case, the jury does not
    have the assistance necessary to reach an intelligent or correct decision.
    Third, although the Obtryx may have differed from the Ethicon branded
    TVT in three ways, evidence of these different design elements is not enough.
    The plaintiffs needed to prove, through expert testimony, that use of the
    Ethicon branded TVT would have reduced or avoided the risk of harm to
    Fajardo. There simply was not sufficient evidence on this point. To the
    contrary, Rosenzweig testified that Fajardo suffered from a chronic foreign
    body reaction, that use of polypropylene mesh can cause a foreign body
    reaction, and that both the Ethicon branded TVT and the Obtryx were made
    of polypropylene mesh. Accordingly, the plaintiffs did not produce sufficient
    evidence to support an instruction under Bifolck 1.
    21
    There was evidence introduced in the present case that the transobtura-
    tor approach was as effective and reduced or avoided some risk of injuries
    to patients. For example, the authors of the Petri study explained that
    ‘‘numerous different types of transobturator slings like inside-out tapes
    and thermally annealed non-knitted, non-interwoven polypropylene tape
    (Obtape) were developed and tested in clinical trials. In terms of efficacy,
    both retropubic and transobturator tapes are found to have similar subjective
    and objective cure rates . . . . Only one meta-analysis showed that the
    occurrence of bladder perforations, pelvic hematoma, and storage lower
    urinary tract symptoms was significantly less common in patients treated
    by transobturator tapes . . . .’’ (Citations omitted.) E. Petri & K. Ashok,
    ‘‘Comparison of Late Complications of Retropubic and Transobturator Slings
    in Stress Urinary Incontinence,’’ 23 International Urogynecology J. 321, 321
    (2012); see id., 324 (concluding that obstructive complications seen more
    commonly in retropubic tapes as compared to transobturator tapes were
    more frequently associated with persistent pain, dyspareunia, and tape
    related infections). Other studies introduced at trial explained that ‘‘[p]oten-
    tial advantages of the transobturator approach include fewer bladder and
    bowel injuries and less voiding dysfunction and urinary retention than with
    traditional sling procedures.’’ P. Rosenblatt & S. Pulliam, ‘‘Update on Subur-
    ethral Slings for Stress Urinary Incontinence,’’ Contemporary OB/GYN, April
    15, 2004, available at https://www.contemporaryobgyn.net/view/update-
    suburethral-slings-stress-urinary-incontinence (last visited December 10,
    2021). Another study concluded that, ‘‘[i]n short-term follow-up there was
    no obvious difference between [retropubic] and [transobturator] routes in
    terms of safety and efficacy.’’ T. Tarcan et al., ‘‘Safety and Efficacy of
    Retropubic or Transobturator Midurethral Slings in a Randomized Cohort
    of Turkish Women,’’ 93 Urologia Internationalis 449 (2014).
    The studies showed that each approach had benefits and risks. The ques-
    tion under Bifolck 1 is not simply whether there are other feasible designs,
    but whether there is a feasible design that would have reduced or avoided
    the risk of harm to Fajardo. This complicated medical evidence demonstrates
    that the jury needed the assistance of an expert qualified to testify regarding
    product design to enable the jury to make an intelligent decision regarding
    whether there was a reasonable alternative design that would have reduced
    or avoided the risk of harm to Fajardo. The plaintiffs failed to produce that
    expert evidence, and therefore, its request for an instruction under Bifolck
    1 was properly denied.
    22
    At trial, Bercik testified as follows:
    ‘‘Q. What kind of polypropylene is the TVT sling made of that you use?
    ‘‘A. I’m not sure—I’m not sure what you’re asking.
    ‘‘Q. Is a TVT sling made of the same polypropylene as the Obtryx sling?
    ***
    ‘‘Q. Doctor, do you know what kind of polypropylene the Obtryx sling is
    made of?
    ‘‘A. I do know it’s made of something called—I think Marlex.
    ‘‘Q. Okay.
    ‘‘A. It’s what they use.
    ‘‘Q. Okay. Do you know . . . if the TVT sling is made of the same Marlex?
    ‘‘A. I don’t know if it’s made of the same—like, from the same manufacturer
    or anything like that.
    ‘‘Q. Okay. Is—
    ‘‘A. I don’t know.
    ‘‘Q. —is TVT made by the same manufacturer as the Obtryx sling?
    ‘‘A. No, ma’am.
    ‘‘Q. Okay.
    ‘‘A. Different company.’’
    Although the concurrence and dissent asserts that Bercik’s testimony is
    not necessary or important to its position; see footnote 6 of the concurring
    and dissenting opinion; it cites to his testimony no less than thirty-seven
    times, refers to the fact that Bercik was disclosed as a product design expert,
    and relies on him as such. However, by characterizing Bercik as a product
    design expert, the concurrence and dissent disregards the fact that there
    was a motion in limine to exclude him from testifying as a product design
    expert. Although there is not a clear ruling on that motion in the record,
    there is discussion on the record about his testimony being limited, and
    Bercik testified that he was not aware of a key aspect of the design of the
    Ethicon branded TVT, namely, the type of mesh from which it is made.
    Moreover, in its memorandum of decision, the trial court explained that
    ‘‘Rosenzweig . . . was [the plaintiffs’] product design expert,’’ and the plain-
    tiffs neither challenge that conclusion on appeal nor cite to Bercik in support
    of their claim. Accordingly, we disagree with the efforts of the concurrence
    and dissent to cast Bercik as qualified to give expert testimony regarding
    whether the TVT was a reasonable alternative design for the Obtryx.
    23
    The concurrence and dissent asserts that Bercik ‘‘indicated that he had
    tried using the Obtryx, which employs a transobturator approach, had a
    negative experience with it, and so began using the Ethicon TVT, which
    uses a different approach.’’ Footnote 22 of the concurring and dissenting
    opinion. That does not accurately characterize Bercik’s actual testimony.
    He testified that he had implanted slings using the transobturator approach
    in the past but that he had stopped doing that because of complications.
    He then clarified that he had ‘‘trialed the [Obtryx] maybe once in the
    operating room’’ and had ‘‘never used it on a regular basis . . . .’’ He further
    explained: ‘‘I think I mentioned I [tried] the Obtryx once, and I don’t remem-
    ber why I don’t—it was something about it that I didn’t like. I don’t know,
    I don’t recall, it was ten years ago. But I gave up using other obturator
    approach slings because of my experience.’’ Contrary to the representations
    of the concurring and dissenting opinion; see footnote 22 of the concurring
    and dissenting opinion and accompanying text; Bercik clearly testified that
    his ‘‘negative experience’’ was with other slings implanted using the transobt-
    urator approach, not the Obtryx.
    24
    The plaintiffs assert that ‘‘[t]here were also a number of other studies
    admitted as full exhibits [that] supported the claim that the risks of the
    Obtryx outweigh its benefits in comparison with safer alternatives on the
    market at the time.’’ The plaintiffs did not, however, identify the studies to
    which they refer.
    25
    One of the studies introduced into evidence explains: ‘‘The retropubic
    tension-free vaginal tape (TVT, Gynecare, Somerville, NJ, USA) which was
    introduced in [the] 1990s is commonly acknowledged as the gold standard
    of [midurethral slings] by virtue of its extensive safety and efficacy data in
    the literature.’’ Y. Lim et al., ‘‘Do the Advantage Slings Work As Well As the
    Tension-Free Vaginal Tapes?,’’ 21 International Urogynecology J. 1157, 1157
    (2010) (Lim study). Although the Lim study does state that the TVT has the
    most extensive data and was the original vaginal sling on the market, its
    authors concluded: ‘‘In this study, we found that the Advantage sling appears
    to be as effective as the TVT. There was a trend [toward] more overactive
    bladder and voiding difficulty issues, which may be related to the slightly
    stiffer nature of the Advantage sling, thus requiring the Advantage slings to
    be left slightly looser than [the] TVT. Further randomized controlled trials
    are necessary to confirm this supposition.’’ Id., 1161.
    Thus, although the Lim study may establish that the Ethicon branded TVT
    was a feasible alternative to the Obtryx, it does not establish that it would
    have reduced or avoided the risk of harm to Fajardo. The concurrence and
    dissent repeatedly uses the term ‘‘gold standard’’ to imply that the Ethicon
    branded TVT was the safest product on the market. But, as we have explained
    previously in this opinion, there was evidence presented at trial that the
    Ethicon branded TVT and each of the other products within the class of
    TVTs had risks and complications associated with them. In light of the
    fact that they were complicated medical devices with complicated safety
    information, the plaintiffs had to do more to demonstrate that use of the
    Ethicon branded TVT would have reduced or avoided the risk of harm
    to Fajardo.