Margaret Young, Individually and as Representative of the Estate of William R. Young v. Venkateswarlu Thota, M.D. and North Texas Cardiology Center ( 2008 )


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  •                        COURT OF APPEALS
    SECOND DISTRICT OF TEXAS
    FORT WORTH
    NO. 2-05-350-CV
    MARGARET YOUNG, INDIVIDUALLY AND                                 APPELLANT
    AS REPRESENTATIVE OF THE ESTATE OF
    WILLIAM R. YOUNG
    V.
    VENKATESWARLU THOTA, M.D. AND                                     APPELLEES
    NORTH TEXAS CARDIOLOGY CENTER
    ------------
    FROM THE 30TH DISTRICT COURT OF WICHITA COUNTY
    ------------
    OPINION
    ------------
    Appellant Margaret Young, individually and on behalf of the estate of her
    deceased husband, William R. (“Ronnie”) Young, appeals from an adverse jury
    verdict on her medical malpractice claim against Venkateswarlu Thota, M.D.
    and his employer, North Texas Cardiology Center (NTCC), in connection with
    their treatment during Ronnie’s cardiac catheterization. We reverse and remand
    for a new trial.
    Factual Background
    Appellant is Ronnie’s widow. Ronnie died on March 10, 2005. Ronnie
    had suffered from a blood disorder called Polycythemia Vera (PV) and coronary
    artery disease, including hypertension and angina. His cardiologist, Dr. Thota,
    with NTCC (collectively “appellees”), recommended that Ronnie undergo a
    cardiac catheterization to evaluate his heart condition. The catheterization was
    scheduled for March 4, 2002 at United Regional Health Care System in Wichita
    Falls, Texas. Dr. Thota performed the procedure that morning, and Ronnie was
    discharged that afternoon. At the time, Ronnie was fifty-five years of age.
    After Ronnie began feeling poorly at home and fell from his chair around
    11:45 p.m., appellant called 911, and Ronnie returned to the hospital’s
    emergency room around 1:15 a.m. Olyn Walker, M.D. ultimately operated on
    Ronnie that night to repair a tear in his iliac artery and the resulting internal
    bleeding allegedly caused by the catheterization procedure.           During the
    emergency surgery, Dr. Walker discovered a large hematoma from severe
    bleeding in the peritoneal cavity. After the surgery, Ronnie was placed on a
    ventilator, suffered acute renal failure that required dialysis, received multiple
    blood transfusions, underwent a splenectomy, and underwent surgery to
    2
    remove his gallbladder once it became gangrenous due to ischemia caused by
    the bleed. He ultimately lost vision in one eye and suffered numerous strokes
    and blood clots, all allegedly as a result of the negligent catheterization. Ronnie
    stayed in the hospital in Wichita Falls for two months and later transferred to
    Baylor University Medical Center (BUMC) in Dallas, Texas, on May 2, 2002.
    While at BUMC, he was diagnosed with and treated for thrombocytosis, sepsis,
    respiratory failure, depression, malnourishment, gout, deep vein thrombosis, and
    portal vein thrombosis.         When he left BUMC, he went to Baylor Specialty
    Hospital for rehabilitation for an additional two months. Ronnie died on March
    10, 2005, about three years after the original procedure, at the age of fifty-
    eight.
    After Ronnie died, appellant brought suit individually and on behalf of his
    estate against Dr. Thota and NTCC.1 Appellant alleged appellees were negligent
    in failing to obtain an accurate medical history on Ronnie, in failing to take into
    consideration any of Ronnie’s pre-existing conditions that might have
    exacerbated potential complications, in failing to properly locate the femoral
    artery and lacerating the right iliac artery instead during the catheterization, in
    1
    … NTCC’s alleged liability was based solely on respondeat superior.
    3
    failing to discover the laceration before discharging Ronnie, and in failing to
    properly diagnose and treat the tear.
    In response, appellees contended that Ronnie’s injuries were the result of
    an unavoidable accident; in other words, they were no one’s fault.
    Alternatively, they contended that his injuries were the result of a new and
    independent cause or the result of pre-existing conditions or subsequent
    conditions. Appellees also contended that the occurrence was the result of
    Ronnie’s comparative negligence under chapter 33 of the civil practices and
    remedies code and asserted a counterclaim against Ronnie for contribution and
    for his alleged failure to mitigate his damages.       Appellees’ defenses and
    counterclaims generally focused on their claims that Ronnie’s injuries were a
    result of his pre-existing conditions, as well as Ronnie’s failure to follow his
    discharge instructions.
    The trial court submitted issues on appellees’ negligence and Ronnie’s
    contributory negligence and further gave the jury inferential rebuttal instructions
    on new and independent cause and unavoidable accident. 2          In a ten to two
    2
    … The trial court gave the jury an inferential rebuttal instruction on new
    and independent cause and unavoidable accident as to Dr. Thota but only gave
    Ronnie an inferential rebuttal instruction on unavoidable accident.
    4
    verdict, the jury found that only Ronnie was negligent and awarded neither
    Ronnie’s estate nor appellant any damages.
    Issues on Appeal
    In four issues, appellant challenges the sufficiency of the evidence to
    support the jury’s answers to Question One, complains that the trial court erred
    by submitting Ronnie’s contributory negligence to the jury within this question,
    and contends that the trial court erred by submitting jury instructions on
    unavoidable accident and new and independent cause.
    Claimed Jury Charge Error
    First, we address those issues claiming jury charge error. We address the
    propriety of the trial court’s charge regarding Ronnie’s contributory negligence
    first because that issue is potentially dispositive of the appeal and could give
    appellant the greatest relief.     See Tex. R. App. P. 47.1; see generally
    VanDevender v. Woods, 
    222 S.W.3d 430
    , 433 n.9 (Tex. 2007); W est v.
    Robinson,
    180 S.W.3d 575
    , 576–77 (Tex. 2005); Profitlive P’ship v. Surber,
    
    248 S.W.3d 259
    , 262 (Tex. App.—Fort Worth 2007, no pet.); 
    id. at 263
    (Walker, J., concurring and dissenting).
    Standard of Review
    Rule 277 requires a trial court, whenever feasible, to submit a cause in
    broad-form questions. Tex. R. Civ. P. 277. Rule 278 requires a court to submit
    5
    instructions and definitions to the jury as are necessary to enable the jury to
    render a verdict. Tex. R. Civ. P. 278; Goose Creek Consol. ISD v. Jarrar’s
    Plumbing, Inc., 
    74 S.W.3d 486
    , 499 (Tex. App.—Texarkana 2002, pets.
    denied). Inferential rebuttal questions are not to be submitted to a jury; only
    instructions and definitions may be given. Tex. R. Civ. P. 277. W e review
    claimed jury charge error for an abuse of discretion. In re V.L.K., 
    24 S.W.3d 338
    , 341 (Tex. 2000); Goose 
    Creek, 74 S.W.3d at 499
    ; see also Tex. Dep’t
    of Human Servs. v. E.B., 
    802 S.W.2d 647
    , 649 (Tex. 1990). If the pleadings
    and evidence raise the issue, a party is entitled to a jury question, instruction,
    or definition on the matter. Tex. R. Civ. P. 278; Union Pac. R.R. Co. v.
    Williams, 
    85 S.W.3d 162
    , 166 (Tex. 2002).
    The Charge
    In her issues, appellant focuses on charge error that she claims occurred
    in the first jury question and the challenged definitions. Question One asked,
    as to both appellee, Dr. Thota, and Ronnie:
    Did the negligence, if any, of those           named    below,
    proximately cause the injury in question, if any?
    “Negligence,” when used with respect to the conduct of
    Venkat Thota, M.D., means failure to use ordinary care, that is,
    failing to do that which a cardiologist of ordinary prudence would
    have done under the same or similar circumstances or doing that
    which a cardiologist of ordinary prudence would not have done
    under the same or similar circumstances.
    6
    “Ordinary care,” when used with respect to the conduct of
    Venkat Thota, M.D., means that degree of care that a cardiologist
    of ordinary prudence would use under the same or similar
    circumstances.
    “Proximate Cause” when used with respect to the conduct
    of Venkat Thota, M.D., means that cause which, in a natural and
    continuous sequence unbroken by any new and independent cause,
    produces an event, and without which cause such event would not
    have occurred. In order to be a proximate cause, the act or
    omission complained of must be such that a cardiologist using
    ordinary care would have foreseen that the event, or some similar
    event, might reasonably result therefrom. There may be more than
    one proximate cause of an event.
    “New and independent cause,” when used with respect to
    the conduct of Venkat Thota, M.D., means the act or omission of
    a separate and independent agency, not reasonably foreseeable by
    a cardiologist exercising ordinary care, that destroys the causal
    connection, if any, between the act or omission inquired about and
    the injury in question and thereby becomes the immediate cause of
    such injury.
    “Negligence,” when used with respect to the conduct of
    [Ronnie] Young means failure to use ordinary care, that is, failing
    to do that which a person of ordinary prudence would have done
    under the same or similar circumstances or doing that which a
    person of ordinary prudence would not have done under the same
    or similar circumstances.
    “Ordinary care,” when used with respect to the conduct of
    [Ronnie] Young means that degree of care that a person of ordinary
    prudence would use under the same or similar circumstances.
    “Proximate cause,” when used with respect to the conduct
    of [Ronnie] Young means that cause which, in a natural and
    continuous sequence, produces an event, and without which cause
    such event would not have occurred. In order to be a proximate
    cause, the act or omission complained of must be such that a
    7
    person using ordinary care would have foreseen that the event, or
    some similar event, might reasonably result therefrom. There may
    be more than one proximate cause of an event.
    An injury may be an “unavoidable accident,” that is, an event
    not proximately caused by the negligence of any party to it.
    Answer “Yes” or “No”.
    Venkat Thota, M.D.:                               [NO]
    [Ronnie] Young:                                   [YES]
    [Emphasis added.]
    The next jury question conditionally asked about Dr. Thota’s and Ronnie’s
    comparative (percentage) negligence but was not answered because of the
    jury’s answer to the first question.
    Contributory Negligence versus Mitigation of Damages
    In part of her second issue, appellant complains of charge error in the
    submission of Ronnie’s claimed contributory negligence instead of an instruction
    on Ronnie’s duty to mitigate his damages. When considering the propriety of
    submitting a plaintiff’s contributory negligence as opposed to a plaintiff’s failure
    to mitigate his or her damages, we are to consider whether the alleged
    negligence “merely increases or adds to the extent of the loss or injury
    occasioned by another’s negligence,” in which case submission of an
    instruction on mitigation of damages would be appropriate as opposed to a
    8
    contributory negligence question. Elbaor v. Smith, 
    845 S.W.2d 240
    , 245 (Tex.
    1992) (citing Kerby v. Abilene Christian Coll., 
    503 S.W.2d 526
    , 528 (Tex.
    1973)).
    The mitigation of damages doctrine requires an injured party to “exercise
    reasonable care to minimize its damages if damages can be avoided with only
    slight expense and reasonable effort.” Cotten v. Weatherford Bancshares, Inc.,
    
    187 S.W.3d 687
    , 708 (Tex. App.—Fort Worth 2006, pet. denied). As noted
    by the Texas Supreme Court in Moulton v. Alamo Ambulance Serv., Inc., the
    injured person’s failure
    to care for and treat his injuries as a reasonable prudent person
    would under the same or similar circumstances was ‘a branch of
    the doctrine of contributory negligence[’] . . . only in the sense that
    damages resulting from such failure are ultimately not proximately
    caused by the wrongdoer’s acts or omissions, but by the injured
    person’s own subsequent negligence.
    
    414 S.W.2d 444
    , 449 (Tex. 1967) (emphasis added) (quoting Gulf, C. & S.F.
    Ry. Co. v. Mannewitz, 
    70 Tex. 73
    , 
    8 S.W. 66
    , 67 (1888)). In Moulton, the
    court noted that the plaintiff’s failure to follow competent medical advice
    aggravated the injuries he sustained in a collision and thus allowed submission
    of an instruction on failure to mitigate damages as opposed to one on
    contributory negligence. 
    Id. at 448–49.
    “Contributory negligence goes to the proximate cause of the original
    incident.”   Hygeia Dairy Co. v. Gonzalez, 
    994 S.W.2d 220
    , 226 (Tex.
    9
    App.—San Antonio 1999, no pet.). “Mitigation of damages, on the other hand,
    arises from [the injured party’s] separate duty to act reasonably in reducing his
    damages.” Id.; see also Harris County v. Smoker, 
    934 S.W.2d 714
    , 721 (Tex.
    App.—Houston [1st Dist.] 1996, writ denied) (summarizing Moulton’s holding
    that an instruction on mitigation of damages is appropriate when there is
    evidence of negligence on the part of the plaintiff in failing to consult a doctor,
    in doing so untimely, in failing to follow a doctor’s advice, or in not caring for
    and treating injuries that do not require a doctor’s attention).
    The party that asserts the injured party’s failure to mitigate has the
    burden of proving the failure to mitigate and must show the extent to which the
    damages were increased by the failure to mitigate. 
    Cotten, 187 S.W.3d at 708
    ; U.S. Rest. Props. Operating L.P. v. Motel Enters., Inc., 
    104 S.W.3d 284
    ,
    293 (Tex. App.—Beaumont 2003, pet. denied).
    In Kerby, the plaintiff driver suffered injuries when the defendant’s school
    bus ran a red light and struck 
    him. 503 S.W.2d at 527
    . The plaintiff, driving
    a linen van, was thrown from his van through its open sliding door when it was
    struck. 
    Id. The van
    landed on him, and he suffered injuries. 
    Id. At trial,
    the
    court submitted questions to the jury inquiring of the plaintiff’s potential
    contributory negligence in leaving his van door open. 
    Id. The jury
    answered
    affirmatively, finding the plaintiff thirty-five percent negligent in causing the
    10
    accident. 
    Id. The trial
    court entered judgment in the plaintiff’s favor on the
    jury’s verdict but reduced the amount of damages it found by the percentage
    of negligence attributable to the plaintiff. 
    Id. The appeals
    court reversed the
    trial court’s judgment and rendered judgment solely in favor of the defendant,
    concluding that the special issues inquiring of plaintiff’s negligence in leaving
    the van door open constituted findings of contributory negligence and proximate
    cause, requiring a complete defense verdict.3 
    Id. The supreme
    court reversed
    both the trial court’s judgment and the court of appeals’s judgment and
    rendered judgment for the plaintiff for the entire amount of damages assessed
    by the jury, unreduced by the percentage of negligence it attributed to the
    plaintiff. 
    Id. at 529.
    The supreme court held, “Even if there were proof that
    the particular injury suffered would not have been suffered had Kerby avoided
    being thrown from his truck, it would not support the jury’s finding of
    percentage contribution.”     
    Id. The court
    noted, “Negligence which merely
    increases or adds to the extent of the loss or injury occasioned by another’s
    negligence is not such contributory negligence as would defeat recovery.” 
    Id. 3 …
    When Kerby was tried in June 1973, our current system of inquiring
    into the comparative fault of the parties had not yet been created; a finding of
    contributory negligence on the part of a plaintiff constituted a bar to a plaintiff’s
    recovery, unlike an affirmative finding on a mitigation question. See Tex. R.
    Civ. P. 277, 493-494 S.W.2d (Tex. Cases) xxxii–iii (1973, amended 1987); see
    also Tex. Workers’ Comp. Comm’n v. Garcia, 
    893 S.W.2d 504
    , 529 (Tex.
    1995); cf. Tex. Civ. Prac. & Rem. Code Ann. §§ 33.001–.017 (Vernon 2008).
    11
    at 526. Thus, the supreme court held that the trial court erroneously included
    an issue on the plaintiff’s alleged contributory negligence instead of a mitigation
    instruction. 
    Id. at 528.
    Alternatively, in Elbaor, plaintiff Smith, who had also been injured in an
    automobile accident, went to a hospital for treatment for her multiple injuries,
    including a bleeding, compound ankle 
    fracture. 845 S.W.2d at 241
    –42. She
    underwent emergency surgery to stop the bleeding, and she remained under the
    admitting doctor’s care for the first week. 
    Id. at 242.
    She transferred to a
    different hospital and was then under the care of James E. Elbaor, M.D., an
    orthopedic surgeon, among others, including an infectious disease specialist,
    who put her on intravenous antibiotics. 
    Id. While there,
    she also underwent
    two wound debridements in an effort to stop any infection in her ankle. 
    Id. A few
    weeks later, she was transferred to another hospital where her then
    physician removed a two-inch section of bone from her ankle. 
    Id. Despite continued
    treatment over the next three years, her ankle ultimately became
    fused. 
    Id. While settling
    with some of the providers, she went to trial against Dr.
    Elbaor and Dr. Syrquin, one of her other treating physicians, and the jury
    returned a substantial verdict in her favor, allocating eighty-eight percent of the
    liability to Dr. Elbaor and twelve percent to Dr. Syrquin. 
    Id. Whether Smith’s
    12
    ankle was infected was hotly contested at trial, but evidence showed that she
    had been uncooperative and had refused to follow some of her doctors’
    instructions concerning her antibiotic medications and traction. 
    Id. The trial
    court refused to submit Dr. Elbaor’s requested question on Smith’s contributory
    negligence, finding the evidence insufficient to support the submission of the
    issue and, instead, instructed the jury on its right to consider Smith’s failure to
    mitigate damages. 4 
    Id. at 245.
    On appeal, Dr. Elbaor challenged, among other
    things, the trial court’s failure to submit his requested issue on Smith’s
    contributory negligence. 
    Id. at 244.
    The appellate court agreed with the trial
    court and affirmed its decision to instruct only on mitigation based on Kerby.
    
    Id. at 244–45.
    The Texas Supreme Court reversed, however, concluding that
    the facts in Elbaor were distinguishable from Kerby and required the submission
    4
    … The trial court refused Dr. Elbaor’s requested question on Smith’s
    contributory negligence and instead instructed the jury “to exclude from its
    verdict any damages attributable to Ms. Smith’s negligence. This instruction
    contained no definition of negligence upon which the jury could have based its
    decision.” 
    Elbaor, 845 S.W.2d at 245
    . The instruction read,
    Do not include any amount for any condition resulting from the
    failure, if any, of Carole Mercer Smith to have acted as a person of
    ordinary prudence would have under the same or similar
    circumstances in caring for herself and cooperating in the treatment
    of her injuries, if any, that resulted from the medical care made the
    basis of the lawsuit.
    
    Id. at 245
    n.8.
    13
    of the plaintiff’s contributory negligence as opposed to only an instruction
    addressing her failure to mitigate her damages. 
    Id. at 245.
    The Texas Supreme
    Court pointed to the distinction exemplified in Kerby: we look to whether the
    plaintiff’s conduct contributed to the accident or occurrence or only increased
    the injuries suffered.   
    Id. “Contributory negligence
    must have the causal
    connection with the accident that but for the conduct the accident would not
    have happened.” 
    Kerby, 503 S.W.2d at 528
    .
    In reviewing rules 277 and 278, the court in Elbaor noted that trial courts
    are required to submit requested questions if the evidence supports 
    them. 845 S.W.2d at 243
    .     First, the court considered whether any evidence existed
    showing that Smith’s refusal to take antibiotics preceded the onset of infection
    to her ankle. 
    Id. Finding such
    evidence to exist, the court next noted some of
    the factual distinctions between the Elbaor case and the Kerby case. 
    Id. For example,
    it observed that driving with a van door open was not “intrinsically
    harmful” or a “breach of a legal duty” as opposed to the doctor-patient
    relationship in Elbaor that presupposes a “duty of cooperation which patients
    owe treating physicians who assume the duty to care for them.” 
    Id. at 245.
    Perhaps more importantly, the Kerby court noted that having the van door open
    did not actually contribute to the vehicular accident, the basis for the suit,
    “rather, it only increased the injuries suffered in the accident.” 
    Id. Conversely, 14
    in the Elbaor case, the “accident” or “occurrence” at issue in the suit was
    Smith’s infected ankle (as opposed to the original vehicular accident that
    caused her original compound ankle fracture), and her conduct contributed to
    or even resulted in the infection. 
    Id. While the
    “accident” or “occurrence” in
    Kerby would have happened with or without the van door being left open, the
    “infected ankle” that Smith claimed Elbaor’s malpractice caused might not have
    occurred had Smith simply followed her doctor’s instructions. 
    Id. Therefore, the
    supreme court held that the trial court’s submission of an instruction on
    mitigation of damages instead of a question on Smith’s alleged contributory
    negligence was error and reversed and remanded for a new trial. 
    Id. at 241.
    In Ronnie’s case, the “injury,” “accident,” or “occurrence” was the tear
    in the artery and the damages were the resulting peritoneal bleed. The issue
    was what or who caused the tear. Appellant’s theory was that Dr. Thota made
    the catheterization incision too high so that sufficient clotting at the site never
    occurred. Appellant contended that the bleeding into Ronnie’s abdomen would
    not have occurred if Dr. Thota’s incision had been made at or below the
    inguinal ligament. Specifically, Appellant argued that if the puncture site had
    been properly placed, the bleeding, if any, would have occurred at the puncture
    site, which would have been immediately apparent, likely before Ronnie was
    even discharged.    Conversely, Dr. Thota theorized that the catheterization
    15
    incision site was proper, that hemostasis had occurred before Ronnie was
    discharged, that a spontaneous blood clot or tear occurred later in the day, that
    Ronnie’s retroperitoneal bleed was the result of his failure to timely return to the
    hospital as directed in the discharge instructions, and that Ronnie would have
    never suffered such massive bleeding if he had timely returned to the hospital.
    As to appellees’ theory of Ronnie’s alleged contributory negligence, they
    assert that Ronnie had a duty to follow Dr. Thota’s instructions, which included
    a duty “to return for evaluation and possible treatment if complications arose
    post-discharge.” Dr. Thota requested the submission of Ronnie’s negligence,
    despite the fact that Dr. Thota specifically testified that he did not blame
    Ronnie for what had happened.5 According to Dr. Thota, Ronnie’s massive
    bleed was the result of a natural blood clot event or tear that worsened only
    because of Ronnie’s delay in returning to the hospital. Dr. Thota provides no
    evidence of Ronnie’s contributory negligence in causing the tear. Regardless,
    Dr. Thota’s premise is based upon Ronnie’s alleged negligence occurring after
    the tear, not Ronnie’s negligence in causing the tear. The evidence supporting
    5
    … Appellees also placed significant blame on appellant for her failure to
    assist or insure that Ronnie returned to the hospital timely; however, appellees
    did not request a charge on appellant’s alleged contributory negligence.
    Because it was not submitted to the jury, we do not consider appellant’s
    alleged negligence in our analysis. See Barker v. Eckman, 
    213 S.W.3d 306
    ,
    313 (Tex. 2006); Moore v. Kitsmiller, 
    201 S.W.3d 147
    , 153 (Tex. App.—Tyler
    2006, pet. denied).
    16
    Dr. Thota’s theory of Ronnie’s contributory negligence blames Ronnie only for
    his breach of duty in failing to follow Dr. Thota’s discharge instructions, which
    he contends resulted in the increased bleeding.       Indeed, a review of the
    evidence shows that Dr. Thota’s theory was that no party was responsible for
    a new or naturally formed blood clot and tear but that all of Ronnie’s damages
    were a result of Ronnie’s failure to timely return to the hospital.       Again,
    contributory negligence goes to the proximate cause of the original incident,
    and mitigation arises from an injured party’s duty to act reasonably in reducing
    his damages. See Hygeia Dairy 
    Co., 994 S.W.2d at 226
    . Thus, Dr. Thota
    points only to Ronnie’s subsequent negligence that might have increased his
    damages as opposed to Dr. Thota’s original negligence.           Therefore, we
    conclude that Ronnie’s negligence, if any, only increased the damages he
    suffered after the catheterization or tear, as opposed to causing the “injury,”
    “accident,” or “occurrence” itself.    See 
    Moulton, 414 S.W.2d at 448
    –49;
    Hygeia Dairy 
    Co., 994 S.W.2d at 225
    .
    Response to Dissent
    The dissent first contends that we have erroneously described Ronnie’s
    injury as being the tear in his right external iliac artery. Instead, the dissent
    contends that the injury was the extensive bleeding from the puncture site.
    This contention stands the whole trial on its head by allowing a defensive
    17
    issue—the plaintiff’s alleged failure to mitigate his damages—to trump the
    plaintiff’s entire theory of the case—the defendant’s negligence in placing the
    catheterization stick too high.      The extensive bleeding and the resulting
    “cascade of complications” are first the result of the negligent injury; the
    plaintiff’s alleged failure to timely return and seek medical intervention only
    increased the damages the plaintiff suffered as opposed to causing them.
    When the dissent says that the “‘tear’ was relevant only because Dr. Walker’s
    report stated that he repaired a ‘tear’ in Young’s artery after Young returned to
    the hospital,” it totally undermines the sole theory of the plaintiff’s case and the
    case that was tried to this jury. An appellate court cannot decide a case on a
    theory different from the one that was pled and tried to the jury. Loera v.
    Interstate Inv. Corp., 
    93 S.W.3d 224
    , 228 (Tex. App.—Houston [14th Dist.]
    2002, pet. denied).
    In support of the majority’s position on what injury the plaintiff was
    actually suing for we note the following.           A review of Paragraph 4.4 of
    Plaintiff’s Fourth Amended Petition states quite clearly, “Unfortunately,
    Defendant    Thota    had   torn   the   right   iliac   artery   during   the   cardiac
    catheterization, and had discharged Mr. Young from the hospital while he was
    still bleeding internally.” And in paragraph 5.1 it states, “Dr. Walker operated
    on Mr. Young to repair a bleed from the iliac artery which had been lacerated
    18
    and torn by Defendant Thota during the catheterization . . . .” And in paragraph
    VI it states that Defendants Thota and NTCC were negligent in their treatment
    in that they
    c.       negligently lacerated the right iliac artery during the
    catheterization;
    d.       failed to make a puncture at the correct location in the
    femoral artery; [and]
    e.       failed to discover the tear in the artery prior to
    discharging him from the hospital.
    Furthermore, the term “injury” was not given a special definition in the
    charge. The only general direction regarding the use of terms and words in the
    charge was in paragraph seven which said, “When words are used in this
    charge in a sense that varies from the meaning commonly understood, you are
    given a proper legal definition, which you are bound to accept in place of any
    other meaning.” See Kroger Co. v. Brown, No. 14-06-00510-CV, 
    2008 WL 2841615
    , at *2 (Tex. App.—Houston [14th Dist.] July 24, 2008, no pet.).
    Because the word “injury” was the word used in the charge and because it was
    not given a special meaning within the charge, we are to use its common
    meaning in light of the case that was tried. The case the appellant tried was
    limited to one theory: the alleged negligence of Dr. Thota in placing the
    catheterization stick too high; this was the injury the plaintiff alleged, and the
    bleeding was the result of that injury.
    19
    The focus of the trial was on what caused the tear. Again, the dissent
    boldly says, “There [is] no evidence that Dr. Thota caused the tear or that its
    existence was a causal factor in any of Young’s bleeding or subsequent
    complications.” The actual record, and all the experts, even Dr. Thota, agree
    and concede that wherever the tear was, that was the puncture site; that the
    tear location and the puncture site were one and the same; and that it was the
    site of the bleed. Ronnie’s entire claim revolved around whether the stick was
    too high.
    The dissent says the tear or stick cannot be the “injury.” Instead, it says
    the “injury” is the extensive bleeding from the puncture site into Ronnie’s
    retroperitoneal cavity. While it is true this happened, the extensive bleeding is
    more in the nature of the resultant damage; the “tear” is the “injury” and the
    “bleed” is the resultant damage. But for the tear, there would have been no
    bleed and therefore no damages. Again, “negligence that merely increases or
    adds to the extent of the loss or injury occasioned by another’s negligence is
    not such contributory negligence as will defeat recovery” but is in the nature
    of negligence that contributes to the damages sustained instead. 
    Kerby, 503 S.W.2d at 528
    .     Importantly, Dr. Thota’s only theory of liability asserted
    against Ronnie is his failure to timely seek medical advice; Dr. Thota concedes
    the tear was at the puncture site, that Ronnie did not cause the tear, and that
    20
    Ronnie’s only misdeed was his failure to return to the hospital or to call Dr.
    Thota. Even if we, as the majority, concede that as to Dr. Thota’s defensive
    theory the only injury is the bleed, this concession that the injury as to Ronnie
    was the tear and the injury as to Dr. Thota was the extensive bleed would
    prove only that there were two different theories of liability tried.
    The dissent says this case is more closely analogous to Elbaor. Again, we
    disagree as shown by our discussion above. In Elbaor, but for the patient’s
    refusal to take antibiotics, she would more likely than not have ever gotten an
    infection, which occurred and caused her further injuries weeks, months, and
    years after her initial car 
    accident. 845 S.W.2d at 242
    . Here, the “injury” (or
    if one prefers to call it the “accident” or “occurrence”) is the tear; it occurred
    that morning during the catheterization procedure, and the bleed occurred
    within hours of Ronnie’s dismissal. The bleed would have occurred with or
    without Ronnie’s delay in seeking medical advice; he would have required
    surgery to repair the tear regardless.    Dr. Thota never claimed that Ronnie
    caused the tear; there was only a claim that his damages would have been far
    less significant had he sought medical intervention sooner.
    In Elbaor, the patient had undergone a surgical procedure on her ankle,
    two post-surgery wound debridements and several hospital 
    transfers. 845 S.W.2d at 242
    . The evidence at trial showed that she had been uncooperative
    21
    and noncompliant in taking the prescribed antibiotics and that she had been free
    of infection post operatively. 
    Id. Her conduct
    contributed directly to her new
    injury—her infected ankle. 
    Id. But for
    her refusal to take the medicine, there
    may have been no infection. 
    Id. Conversely, in
    Ronnie’s case, his failure to
    timely seek medical intervention was the basis for the increased bleeding, but
    it did not even cause the bleeding. It was the tear that caused the bleeding.
    And the bleeding is the sole basis of Dr. Thota’s claim back against Ronnie; it
    quite simply is in the nature of Ronnie’s failure to mitigate.
    The dissent also contends that there is ample evidence of Ronnie’s
    contributory negligence due to his failure to return to the hospital sooner. While
    we acknowledge that patients owe a duty of cooperation to treating physicians
    who assume a duty of care for them and that such a duty includes a duty to
    return for evaluation and treatment, that duty does not justify the submission
    of Ronnie’s negligence in contributing to the injury; it merely justifies a question
    on his failure to mitigate his damages. See Jackson v. Axelrad, 
    221 S.W.3d 650
    , 654 (Tex. 2007); Gross v. Burt, 
    149 S.W.3d 213
    , 225–27 (Tex.
    App.—Fort Worth 2004, pet. denied). Again, Ronnie’s failure to return did not
    cause the tear, which was Ronnie’s theory of Dr. Thota’s negligence. Ronnie’s
    failure to return to the hospital only increased his bleeding and therefore his
    damages. See Kerby, 503 S.W . 2d at 528 (stating, “Negligence that merely
    22
    increases or adds to the extent of the loss or injury occasioned by another’s
    negligence is not such contributory negligence as will defeat recovery”).
    Additionally, the dissent makes note of our interchange of the terms,
    “injury,” “accident,” or “occurrence.”      This is a red herring that makes no
    difference. We clearly acknowledge that the charge controls, and it used the
    term “injury.” We have used the other terms only when citing other cases that
    used “accident” or “occurrence” in their charges.
    The dissent also boldly states, “Young did not die from the complications
    and systems failures that followed cardiac catheterization by Dr. Thota,” as if
    his failure to die absolved the defendants from liability for the survival action
    that appellant brought; she was pursuing a survival action on behalf of her
    husband’s estate for the torturous life he endured from the time of Dr. Thota’s
    catheterization until he died. See Tex. Civ. Prac. & Rem. Code Ann. §71.021
    (Vernon 2008); Pack v. Crossroads, Inc., 
    53 S.W.3d 492
    , 515–16 (Tex.
    App.—Fort Worth 2001, pet. denied).
    For all of these reasons, we conclude and hold that the trial court abused
    its discretion by submitting Ronnie’s alleged contributory negligence to the jury
    instead of giving the jury an instruction on Ronnie’s duty to mitigate his
    damages. We therefore sustain the part of appellant’s second issue challenging
    the submission of Ronnie’s contributory negligence.
    23
    Now we must conduct a harm analysis on the erroneous submission of
    the jury question on Ronnie’s contributory negligence.
    Harm Analysis
    Generally, the rules of appellate procedure provide two bases for
    reversing an error of law. Tex. R. App. P. 41.1, 61.1; Harris County v. Smith,
    
    96 S.W.3d 230
    , 234 (Tex. 2002). The error must be one which “probably
    caused the rendition of an improper judgment”—44.1(a) and 61.1(a)—or the
    error must be one which “probably prevented the petitioner [appellant] from
    properly presenting the case to the appellate courts”—41.1(b) and 61.1(b).
    Tex. R. App. P. 41.1, 61.1. Casteel’s “presumed harm” charge analysis has
    been limited to charge error in which erroneous theories of liability or damages
    were mixed with valid theories and the reviewing court was unable to determine
    whether the improperly submitted theories formed the sole bases of the jury’s
    verdict or damages. Harris 
    County, 96 S.W.3d at 235
    –36; Crown Life Ins. Co.
    v. Casteel, 
    22 S.W.3d 378
    , 389 (Tex. 2000). However, when the error simply
    involves erroneous submission of inferential rebuttal instructions, Urista tells us
    that we must show that the error caused rendition of an improper judgment.
    Bed, Bath and Beyond v. Urista, 
    211 S.W.3d 753
    , 757 (Tex. 2006); see also
    Torres v. Tessier, 
    231 S.W.3d 60
    , 63 n.2 (Tex. App.—Houston [14th Dist.]
    2007, no pet.).
    24
    Here, there were two competing theories of liability submitted within one
    broad-form liability question that asked of the two primary actors’ potential
    liability: one was valid and the other invalid. Thus, Casteel’s presumed harm
    analysis applies. 
    Casteel, 22 S.W.3d at 388
    –89. The jury’s answers, finding
    no negligence attributable to Dr. Thota and all the negligence attributable to
    Ronnie, commingled valid and invalid theories of liability because there was no
    evidence of Ronnie’s negligence in causing the tear and no claim by Dr. Thota
    that Ronnie’s negligence caused the tear. While one might argue that we, as
    the appellate court, can still affirm the jury’s verdict because it might have
    found that Dr. Thota was not negligent, when looking at the jury charge in its
    entirety as we must, we cannot know if the jury truly found Dr. Thota not
    negligent or whether the jury excused any negligence attributable to Dr. Thota
    because of properly submitted inferential rebuttal instructions. Therefore, to
    answer this question, we must also evaluate the propriety of the challenged
    inferential rebuttal instructions; if the inferential rebuttal instructions were
    erroneously submitted as well, then the jury’s no liability finding could also have
    been based on an incorrect theory. See 
    id. at 389
    (stating, “It is essential that
    the theories submitted be authorized and supported by the law governing the
    case . . . [and i]f they are not, the appellate court must, at a minimum, be able
    25
    to determine whether properly submitted theories constituted the basis of the
    jury’s verdict”).
    Unavoidable Accident
    The court gave this defensive instruction as to both Dr. Thota’s and
    Ronnie’s potential negligence.      “An unavoidable accident is ‘an event not
    proximately caused by the negligence of any party to it.’” Reinhart v. Young,
    
    906 S.W.2d 471
    , 472 (Tex. 1995); TXI Transp. Co. v. Hughes, 
    224 S.W.3d 870
    , 905 (Tex. App.—Fort Worth 2007, pet. granted) (quoting Dallas Ry. &
    Terminal Co. v. Bailey, 
    151 Tex. 359
    , 
    250 S.W.2d 379
    , 385 (1952)). Usually,
    this instruction is included when there is a question of some physical condition
    or circumstance that might obviate the necessity of finding that some party is
    negligent. 
    Reinhart, 906 S.W.2d at 472
    . This instruction is also given when
    the evidence shows that the event was caused by some “nonhuman condition
    and not by the negligence of any party to the event.” Hill v. Winn Dixie Tex.,
    Inc., 
    849 S.W.2d 802
    , 803 (Tex. 1992). Typically, it is used when some
    environmental condition such as fog, snow, sleet, wet or slick pavement, or
    some obstruction of view is involved. 
    Id. Courts have
    also previously approved
    of an instruction in situations of “unexpected catastrophe” or some “peculiar
    circumstance” other than the negligence of the parties. 
    Id. “Courts should
    refrain   from   submitting   an   unavoidable   accident   instruction   in   other
    26
    circumstances due to the risk that the jury will be misled or confused by the
    perception that the instruction represents a separate issue distinct from general
    principles of negligence.” 
    Id. While historically
    permitted in the medical malpractice arena, Texas courts
    have required a defendant to “first present evidence that the event was caused
    by some condition other than the negligence of the parties.” Crawford v. Hope,
    898 S.W .2d 937, 941 (Tex. App.—Amarillo 1995, writ denied). Only if the
    defendant comes forward with such evidence would a court be required to
    submit this inferential rebuttal question in its charge. 
    Id. A trial
    court does not
    abuse its discretion by submitting the instruction if there is any evidence to
    support it. Kerr v. Brown, No. 07-05-00043-CV, 
    2007 WL 613847
    , at *2
    (Tex. App.—Amarillo Feb. 28, 2007, pet. denied).
    In this case, Dr. Thota presented some evidence that the tear in Ronnie’s
    artery could have been a natural result of some of Ronnie’s diseases or could
    have come from a blood clot that formed and broke away from the puncture
    site.   The trial court could have determined that this was an unexpected
    catastrophe or event, and although a human condition, not a human condition
    caused by the negligence of either one of the parties. Therefore, we conclude
    that the trial court did not abuse its discretion by submitting the unavoidable
    accident instruction as to both Dr. Thota and Ronnie and that this instruction
    27
    would have no effect on our harm analysis regarding the erroneous submission
    of Ronnie’s contributory negligence. See generally Dillard v. Tex. Elec. Co-op.,
    
    157 S.W.3d 429
    (Tex. 2005).
    New and Independent Cause
    Only Dr. Thota received the benefit of a new and independent cause
    inferential rebuttal instruction.   This instruction is required only when the
    evidence shows that “an act or omission of a separate and independent agency
    which destroys the causal connection between the negligent act or omission of
    the defendant and the injury complained of, and thereby becomes in itself, the
    immediate cause of such injury” has occurred. Hall v. Huff, 
    957 S.W.2d 90
    ,
    95 (Tex. App.—Texarkana 1997, pet. denied). It is not an affirmative defense
    but is a factor to be considered by the jury in determining whether proximate
    cause exists. James v. Kloos, 
    75 S.W.3d 153
    , 161 (Tex. App.—Fort Worth
    2002, no pet.). In connection with an instruction on new and independent
    cause, a defendant must show that the intervening cause destroys the causal
    connection between the defendant’s alleged negligence and the resultant injury.
    
    Kloos, 75 S.W.3d at 161
    ; 
    Huff, 957 S.W.2d at 95
    .
    In Kloos, we stated that
    Texas courts distinguish between a new and independent cause
    and a concurrent act. A concurrent act cooperates with the
    original act in bringing about the injury and does not cut off the
    liability of the original actor. A new and independent cause,
    28
    sometimes referred to as a superseding cause, however, is an act
    or omission of a separate and independent agency that destroys the
    causal connection between the negligent act or omission of the
    defendant and the injury complained of . . . . An intervening cause
    that is reasonably foreseeable by the defendant, though, is not a
    new and independent cause that breaks the chain of 
    causation. 75 S.W.3d at 161
    (citations omitted) (emphasis added). Because a new and
    independent cause “extinguishes the liability of a party[, it] cannot arise out of
    an affirmative act of negligence by either the plaintiff or the defendant.” Biaggi
    v. Patrizio Rest., Inc., 
    149 S.W.3d 300
    , 305 (Tex. App.—Dallas 2004, pet.
    denied).   It is also clear that “merely guessing at possible causes” is
    insufficient; medical expert testimony that goes “no further than to testify that
    certain intervening events could have caused” an injury is “equivocal testimony”
    that is insufficient to warrant an instruction on new and independent cause.
    Hersh v. Hendley, 
    626 S.W.2d 151
    , 157 (Tex. App.—Fort Worth 1981, no
    writ) (emphasis added).
    Here, the trial court instructed the jury, as to Dr. Thota only, that a new
    and independent cause may be the “act or omission of a separate and
    independent agency, not reasonably forseeable by a cardiologist . . . that
    destroys the causal connection . . . and thereby becomes the immediate cause
    of such injury.” All parties agreed to the standard of care for a cardiologist
    performing a catheterization: to insert the needle and catheter into the right
    femoral artery, as opposed to the right external iliac artery. The issue here was
    29
    not what the appropriate standard of care was but whether Dr. Thota breached
    that   standard   and   whether   that   breach   was   what    caused   Ronnie’s
    retroperitoneal bleed. The evidence, including the evidence provided by the
    surgeon who repaired the bleed, was that the arterial tear and hematoma
    occurred at the puncture site in the external iliac artery. This evidence was
    corroborated by Dr. Sudarshan, Dr. Thota’s partner who helped care for Ronnie
    that night, and by Dr. Doherty, appellant’s expert witness.
    Moreover, Dr. Thota specifically agreed that the bleeder site had to be at
    the original puncture site; he simply claims that the tear was a result of a
    dislodged clot and that the extensive bleeding was the result of Ronnie’s failure
    to return. While Dr. Doherty concedes that it is a possibility that a clot over the
    site could have dislodged, there is no evidence that this was what actually
    happened; a possibility is not enough. See 
    id. at 157.
    Regardless, both subsequent dislocation of a clot over the puncture site
    and bleeding from the puncture site are foreseeable risks in a catheterization
    procedure. Thus, neither is a new and independent cause but rather a potential
    concurring cause. Therefore, we hold that it was error to submit an instruction
    on new and independent cause on either of these theories as to Dr. Thota.
    Appellees also argue that the claimed failure of both Ronnie and appellant
    to timely seek medical intervention after the procedure constituted a new and
    30
    independent cause. However, as noted above, we may not look to or consider
    appellant’s claimed negligence in not assisting her husband with timely seeking
    medical help after the procedure, and we may not consider Ronnie’s claimed
    negligence because his negligence would not be that of a nonparty or a third
    person. Moreover, we cannot say that a patient’s failure to follow discharge
    instructions is a new and independent cause because such a failure is also
    reasonably foreseeable. See Knoll v. Neblett, 
    966 S.W.2d 622
    , 634 (Tex.
    App.—Houston [14th Dist.] 1998, pet. denied). Therefore, we conclude and
    hold that the trial court abused its discretion by submitting an instruction on
    new and independent cause in connection with Dr. Thota’s alleged negligence.
    We now return to our harm analysis.
    Our question now becomes, what is the effect of an improperly submitted
    contributory negligence question with a properly submitted negligence question
    in conjunction with a properly submitted unavoidable accident instruction and
    an improperly submitted new and independent cause instruction?         In other
    words, which harm analysis do we apply when we have hybrid charge error?
    Are we to apply the presumed harm test of Casteel to the improperly submitted
    jury question on Ronnie’s contributory negligence yet apply the traditional harm
    analysis of Urista to the incorrectly submitted instruction on new and
    independent cause? 
    Urista, 211 S.W.3d at 756
    –57; 
    Casteel, 22 S.W.3d at 31
    389. We believe the answer can be found in the supreme court’s own words,
    “[A]lthough harm can be presumed when meaningful appellate review is
    precluded because valid and invalid theories or damage elements are
    commingled [Casteel], we are not persuaded that harm must likewise be
    presumed when proper jury questions are submitted along with improper
    inferential rebuttal instructions.” 
    Urista, 211 S.W.3d at 757
    (emphasis added).
    The Urista court’s use of the words, “proper jury questions,” is key to the
    analysis here; in Urista the sole negligence theory—that of the defendant’s
    negligence—was properly submitted. 
    Id. Thus in
    Urista, there was only one
    negligence theory submitted and it was proper, so the erroneous submission of
    the inferential rebuttal instruction was easily determined to be harmless in light
    of the entire state of the evidence and the charge. 
    Id. Here, however,
    the jury
    was not only given an erroneous defensive instruction on new and independent
    cause that benefitted only Dr. Thota but also an erroneous jury question on
    liability—Ronnie’s contributory negligence—a theory not supported by the
    evidence. So, we should not be limited to Urista’s traditional harm analysis
    when trying to determine the impact of the improperly submitted instruction on
    new and independent cause when combined with the improperly submitted
    question of Ronnie’s contributory negligence. We simply cannot determine, on
    this evidence, whether the jury properly found Dr. Thota not negligent, properly
    32
    found that his negligence was excused based upon the unavoidable accident
    instruction, or improperly found that his negligence was excused based upon
    the new and independent cause instruction alone or combined with its improper
    finding of Ronnie’s negligence.
    Response to Dissent’s Critique of Our Harm Analysis
    Now, in response to many of the claims made by the dissent, we do not
    agree that the jury “separately” and clearly found “no” as to whether any
    negligence of Dr. Thota was a proximate cause of Ronnie’s injury. It was a
    broad-form liability submission question that erroneously submitted one proper
    liability question (Dr. Thota’s) and one improper liability question (Ronnie’s) and
    obscured the effect of such an erroneous question with the submission of at
    least one erroneous defensive instruction that was completely at odds with the
    facts of the case, the evidence submitted, and the battle fought by the experts
    in the case. More importantly, the submission fails to track the pleadings of the
    case and the evidence and theories that were actually pursued during the trial
    of the case.
    The dissent says that the majority has sua sponte incorrectly applied
    Casteel’s “presumed harm” analysis even if we assume the trial court erred in
    submitting the question of Ronnie’s contributory negligence and giving Dr.
    Thota an inferential rebuttal instruction on new and independent cause.
    33
    However, it is not just that combination that requires us to presume harm but
    the incorrect submission of one correct theory of liability—Dr. Thota’s
    negligence—with one incorrect theory of liability—Ronnie’s alleged contributory
    negligence—which, according to Casteel, when submitted in one broad-form
    liability instruction requires us to presume 
    harm. 22 S.W.3d at 389
    . Because
    Ronnie’s theory of negligence against Dr. Thota is based upon the tear and
    because Dr. Thota’s theory of negligence against Ronnie is based upon Ronnie’s
    failure to timely seek medical help, it is quite clear that Ronnie’s alleged
    contributory negligence could not have avoided Dr. Thota’s initial negligence;
    it could only have reduced the damages Ronnie suffered.
    The dissent also contends that we are reversing on unassigned error
    apparently just because appellant’s brief does not specifically cite to Casteel.
    Her brief does, however, cite Wal-Mart Stores, Inc. v. Johnson, 
    106 S.W.3d 718
    , 723 (Tex. 2003) and quite plainly focuses on its primary point on appeal:
    [B]ecause this instruction (unavoidable accident) was premised on
    a different ‘injury’ (an alleged clot breaking loose) than were the
    ‘contributory negligence’ question and ‘new and independent
    cause’ instruction, it is a near certainty that it served to confuse
    the jury such that it led to the rendition of an improper judgment.
    Appellant also noted in her original briefing, “The submission of this instruction
    probably caused the rendition of an improper judgment,” also citing Wal-Mart.
    34
    Thus, we believe the issue of the correct harm analysis to apply to properly
    preserved charge error is properly before us.
    Next, the dissent also contends that solely because contributory
    negligence is an affirmative defense it is not its own theory of liability and that
    we are wrong when we hold that the first jury question combines a proper
    liability question (Thota’s negligence) and an improper liability question
    (Ronnie’s contributory negligence). Remarkably, the dissent itself bases its
    theory of Ronnie’s negligence on his breach of a duty to timely return to the
    hospital and that this is the proximate cause of Ronnie’s bleeding, which the
    dissent says is the “injury” instead of the damages. But according to Axelrad,
    “The rules which determine the contributory negligence of a plaintiff are . . . the
    same as those which determine the negligence of the 
    defendant.” 221 S.W.3d at 657
    (quoting Restatement (Second) of Torts §§ 289 cmt. a, 464). “[D]uty
    is an element of contributory negligence.”            Nat’l Union Fire Ins. Co. of
    Pittsburgh, Pa. v. Ins. Co. of N. Am., 
    955 S.W.2d 120
    , 136 (Tex.
    App.—Houston      [14th   Dist.]   1997),    aff’d,   
    205 S.W.3d 692
      (2000).
    Contributory negligence is and always has been negligence on the part of a
    plaintiff that is a breach of a duty, owed to oneself, that supersedes the
    causation of damages to oneself. 
    Id. Just because
    it is raised as an affirmative
    defense does not mean it is not its own theory of liability that does not have to
    35
    be proved by the defense. Although Dr, Thota testified that he did not blame
    Ronnie, his defensive theory was that Ronnie did not follow Dr. Thota’s
    discharge instructions and that Ronnie should have called Dr. Thota or returned
    to the emergency room earlier in the evening; that, if he had, he would not have
    bled as much. Dr. Thota never said that Ronnie would have never received the
    tear in his right iliac artery. In fact, he acknowledged that there was a tear. He
    even admitted it was at the puncture site, i.e., where he inserted the catheter.
    He just denied where that insertion was and its cause. Importantly, his theory
    of liability against Ronnie, however, was based solely upon Ronnie’s failure to
    timely seek medical intervention; he says this is the cause of the extensiveness
    of the bleed, which is the basis of his allegation of Ronnie’s negligence.
    By arguing that only one theory of liability was submitted in jury question
    number one, albeit in two subparts, the dissent attempts to force the defense’s
    theory of liability for injury onto Ronnie’s theory of liability against Dr. Thota.
    In other words, the dissent attempts to force the defense’s theory of injury (the
    extensive bleeding) on to Ronnie’s theory of injury (the tear). Because these
    two theories of negligence were commingled in one broad-form question, one
    incorrect and one correct, there was harm.          See 
    Casteel, 22 S.W.3d at 388
    –89. Moreover, the incorrect submission of Ronnie’s alleged contributory
    negligence was exacerbated by the additional incorrect instruction on new and
    36
    independent cause that Dr. Thota received. It is the combination of these two
    incorrect theories that prevents us from being able to determine whether the
    jury’s finding of no liability as to Dr. Thota was a finding of no negligence on
    his part, an erroneous finding of contributory negligence on Ronnie’s part, or an
    erroneous finding of new and independent cause.
    Importantly, we are not trying to extend Casteel’s presumed harm
    analysis to defensive theories; we are applying it to a single broad-form
    question that erroneously includes two different theories of liability. This error
    is only exacerbated by the erroneous defensive instruction of new and
    independent cause.
    Conclusion
    “[A] litigant today has a right to a fair trial before a jury properly
    instructed on the issues ‘authorized and supported by the law governing the
    case.’” Harris 
    County, 96 S.W.3d at 234
    (quoting 
    Casteel, 22 S.W.3d at 389
    ).
    We therefore conclude that the trial court erred by overruling appellant’s
    objections to the charge regarding submission of Ronnie’s contributory
    negligence and the new and independent cause instruction. Because these
    instructions likely caused rendition of an improper judgment or, at least,
    prevented appellant from properly presenting her case on appeal, we conclude
    37
    that such error was harmful. See Tex. R. App. P. 44.1. We therefore reverse
    and remand for a new trial.
    Because we have found trial court error in the charge sufficient to cause
    harm requiring reversal, we need not reach appellant’s other issues on appeal.
    See Tex. R. App. P. 47.1. We reverse the judgment of the trial court and
    remand the cause to the trial court for a new trial. Tex. R. App. P. 43.2(d).
    TERRIE LIVINGSTON
    JUSTICE
    PANEL: LIVINGSTON, GARDNER, and MCCOY, JJ.
    GARDNER, J. filed a dissenting opinion.
    DELIVERED: November 20, 2008
    38
    COURT OF APPEALS
    SECOND DISTRICT OF TEXAS
    FORT WORTH
    NO. 2-05-350-CV
    MARGARET YOUNG, INDIVIDUALLY AND                                  APPELLANT
    AS REPRESENTATIVE OF THE ESTATE OF
    WILLIAM R. YOUNG
    V.
    VENKATESWARLU THOTA, M.D. AND                                      APPELLEES
    NORTH TEXAS CARDIOLOGY CENTER
    ------------
    FROM THE 30TH DISTRICT COURT OF WICHITA COUNTY
    ------------
    DISSENTING OPINION
    ------------
    I think the trial court got the jury charge right. But even assuming error
    in submission of both contributory negligence and the new and independent
    cause instruction, I disagree that the “presumed harm” analysis of Casteel
    applies. The jury separately found “no” as to whether any negligence of Dr.
    Thota was a proximate cause of William R. (“Ronnie”) Young’s injury.
    Examination of the entire record shows that the jury was faced with a “battle
    of experts” as to Dr. Thota’s negligence. It is probable that the jury resolved
    the conflicts in testimony in favor of Dr. Thota in refusing to find that he was
    negligent. There is no clear indication that the jury was influenced by the new
    and independent cause instruction. I would hold that even if there was error
    in the charge, it probably did not result in an improper judgment. Therefore, I
    must dissent.
    I.    BACKGROUND INFORMATION
    It was undisputed that Ronnie had extensive pre-existing medical
    conditions including chronic obstructive pulmonary disease, cardiac disease
    with hypertension, and a completely occluded right coronary artery diagnosed
    in 1992 when he had a previous cardiac catheterization. As the majority notes,
    he had also been diagnosed with polycythemia vera (“PV”), a rare, incurable
    bone marrow disorder resulting in overproduction of blood cells, for which he
    had been treated with bi-monthly phlebotomy and numerous medications,
    including interferon.
    Ronnie presented to Dr. Thota with complaints of severe angina. Dr.
    Thota recommended the second diagnostic cardiac catheterization in February
    2002 to determine if a new blockage had developed.           That Dr. Thota’s
    recommendation was reasonable and appropriate was undisputed. Preoperative
    laboratory studies were acceptable for Ronnie to undergo the procedure.
    2
    According to Dr. Cooper, Ronnie’s treating hematologist before and after the
    procedure performed by Dr. Thota, any person with PV will have an increased
    risk of both bleeding and clotting complications even if everything is optimally
    controlled.
    Ronnie did not die from the complications and systems failures that
    followed the cardiac catheterization by Dr. Thota. PV is a form of cancer; if a
    person lives long enough with it, they will develop leukemia, as Ronnie did.
    Ronnie was diagnosed with leukemia in October 2004 and died from that
    disease on March 10, 2005. His widow prosecuted this suit as a survival
    action on behalf of his estate.
    II.   CONTRIBUTORY NEGLIGENCE WAS PROPERLY SUBMITTED.
    A.      The “injury” was not the “tear” in the artery.
    As a preliminary matter, I disagree that the “injury” to Ronnie that was
    the basis for liability sought against Dr. Thota was the “tear” in Ronnie’s artery.
    There was no evidence that Dr. Thota caused the tear or that its existence was
    a causal factor in any of Ronnie’s bleeding or subsequent complications.
    Appellant’s theory of liability was that Dr. Thota incorrectly placed the puncture
    site for the catheterization.     The “injury” was extensive bleeding from the
    puncture site into Ronnie’s retroperitoneal cavity and the cascade of
    complications he suffered thereafter. The “tear” was relevant only because Dr.
    3
    Walker’s report stated that he repaired a “tear” in Ronnie’s artery after Ronnie
    returned to the hospital, from which the expert witnesses sought to determine
    the location of the puncture site.
    This distinction is important. Dr. Thota’s theory of Ronnie’s contributory
    negligence was that Ronnie failed to follow his instructions to call him or to
    return to the hospital when he began to suffer severe pain. The majority says
    this conduct merely increased his injuries as opposed to causing the “accident”
    or “occurrence.” In so doing, the majority focuses on the word “tear” to try to
    pinpoint the “accident” or “occurrence.”
    B.    The jury was not asked about an “accident” or “occurrence.”
    Despite its protestations otherwise, I believe the majority confuses
    “injury” with “accident” or “occurrence” in analogizing this case to Moulton v.
    Alamo Ambulance Serv., Inc., 
    414 S.W.2d 444
    , 449 (Tex. 1967) (holding
    exclusionary instruction on mitigation rather than contributory negligence
    question proper based on plaintiff’s failure to follow medical advice that merely
    aggravated damages received in auto accident), and Kerby v. Abilene Christian
    College, 
    503 S.W.2d 526
    , 528 (Tex. 1973) (holding trial court erroneously
    submitted contributory negligence instead of mitigation instruction where
    plaintiff’s negligence in leaving van door open did not contribute to cause
    collision but, at most, could only have increased or added to extent of loss or
    4
    damage). Jury Question No. One on liability (as well as the conditioned and
    unanswered questions as to apportionment of responsibility and damages) did
    not ask about any “accident” or “occurrence” but expressly inquired as to
    whether negligence of Dr. Thota or Ronnie proximately caused Ronnie’s
    “injury.”
    C.    Contributory negligence that contributed to the “injury” was
    properly submitted.
    This case more closely resembles Elbaor v. Smith, 
    845 S.W.2d 240
    , 245
    (Tex. 1992). Unlike the facts in Moulton and Kerby, the supreme court in
    Elbaor emphasized that the “accident” in Elbaor “equates to the medical
    problem complained of: Ms. Smith’s infected ankle. Her conduct [refusing to
    take antibiotics as ordered] arguably did contribute to the infection. . . . [T]here
    might have been no infection, and thus no claim for medical malpractice, had
    Ms. Smith followed her doctor’s 
    instructions.” 845 S.W.2d at 245
    . Because
    Dr. Elbaor pleaded that Ms. Smith was contributorily negligent in refusing to
    take her antibiotics and because there was evidence supporting his assertion
    that her refusal contributed to her injury, the court held that a contributory
    negligence question should have been submitted, rather than an instruction on
    mitigation of damages. 
    Id. 5 Like
    the infection of Ms. Smith’s ankle in Elbaor, any “accident” here
    equated to Ronnie’s injury, the retroperitoneal bleeding and subsequent
    complications, not the “tear.” Ronnie’s conduct arguably did contribute to his
    injury, i.e., the bleeding and subsequent consequences, like Ms. Smith’s
    conduct in Elbaor and unlike that in Moulton and Kerby.
    The trial court correctly followed the current Pattern Jury Charge standard
    questions for negligence and contributory negligence, using “injury,” rather than
    “occurrence” or “accident” in this case.6 The jury question recommended by
    the Pattern Jury Charge provides for alternatives of “occurrence,” “injury,” or
    “occurrence or injury” in the form for submitting contributory negligence when
    there is evidence of a plaintiff’s negligence that is injury-causing or injury-
    enhancing but not occurrence-causing. Comm. on Pattern Jury Charges, State
    Bar of Texas, Texas Pattern Jury Charges: General Negligence & Intentional
    Personal Torts PJC 4.1 & cmt. (2006); see also Comm. on Pattern Jury
    6
    … Appellant’s brief on appeal opens with an acknowledgment that the
    jury charge was not based on the “tear” to the external iliac artery, but on the
    damages that resulted from the injury, the shock that resulted from the bleed,
    and the multiple problems that arose as the result. Appellant now complains
    that the charge was based on the wrong foundation and led to an improper
    judgment. IWe disagree for the reasons stated above. Moreover, any
    complaint on this ground was waived by Appellant’s failure to object to the
    term “injury” in Jury Question No,. One.
    6
    Charges, State Bar of Texas, Texas Pattern Jury Charges: Medical Malpractice
    PJC 51.1 & cmt. (2006). The PJC Committee’s comments state that
    use of ‘occurrence’ or ‘injury’. . . could affect a case in which there
    is evidence of the plaintiff’s negligence that is ‘injury-causing’. . .
    but not ‘occurrence-causing’: for example, carrying gasoline in an
    unprotected container which exploded in the crash. . . or failing to
    follow doctor’s orders during recovery, thereby aggravating the
    injuries (post-accident negligence). In such a case the jury should
    not consider this negligence in answering the [liability and
    proportionate responsibility questions] if ‘occurrence’ is used, while
    it should consider the negligence if ‘injury’ is used.
    PJC 4.1 cmt. (emphasis added).7 The PJC comments also state that, if the
    liability question for negligence and contributory negligence is submitted with
    the term “injury,” rather than “occurrence” or “accident,” the exclusionary
    instruction for mitigation of damages should not be submitted. PJC 4.1, 8.9
    cmt; see also PJC 51.1, 80.9 cmt. Under the evidence in this case, the issue
    was whose negligence, if any, caused or contributed to the “injury,” not who
    or what caused an “accident” or “occurrence.”
    D.    Ample evidence supported         the   submission    and   finding   of
    contributory negligence.
    7
    … See also Russell H. McMains, Contribution and Indemnity Problems in
    Texas Multi-Party Litigation, 17 S T. M ARY’S L.J. 653, 676 - 77 (1986) (noting
    that the supreme court treated injury-causing contributory negligence and
    occurrence-causing contributory negligence identically in Duncan v. Cessna
    Aircraft Co., 
    665 S.W.2d 414
    , 429 (Tex. 1984), incorporating within the
    concept of traditional contributory negligence the negligent failure of a plaintiff
    to mitigate damages).
    7
    In Elbaor, the supreme court recognized a duty of cooperation that
    patients owe treating physicians who assume the duty to care for 
    them. 845 S.W.2d at 245
    . The court held that evidence of the patient’s failure to take the
    antibiotics prescribed for her required submission of a question on contributory
    negligence. 
    Id. The duty
    to cooperate also includes the duty to return for
    evaluation and possible treatment if complications arise post-discharge. See
    Jones v. Lurie, 
    32 S.W.3d 737
    , 743 (Tex. App.—Houston [14th Dist.] 2000,
    no pet.) (holding evidence plaintiff ignored physician’s orders to remain in
    psychological treatment centers and hospitals factually sufficient to support
    100 percent contributory negligence finding); Eoff v. Hal & Charlie Peterson
    Found., 
    811 S.W.2d 187
    , 191 (Tex. App.—San Antonio 1991, no writ)
    (holding evidence factually sufficient to support 100 percent contributory
    negligence finding based on evidence plaintiff voluntarily left hospital before
    receiving emergency treatment, ignored advice of physician to return to ER, and
    failed to obtain medical care for seven hours after leaving hospital).
    Ronnie had previously undergone a cardiac catheterization and was aware
    of normal postprocedure discomforts.        He was given written discharge
    instructions to return if he had any of several listed symptoms, including “pain”
    or “any problems.” In his deposition, Ronnie admitted he experienced a severe
    8
    pain in his groin at 6:00 p.m., so severe he had to bend over and hold himself,
    and that it was obvious to his eleven-year-old son, who reported to his mother
    that Ronnie “went down.” He testified that shortly afterwards, he felt worse
    and experienced backache and nausea.
    Those symptoms were different from what Ronnie had experienced after
    his first catheterization. By 9:00 p.m., he was hurting so much in his back and
    stomach that he could not get out of his recliner when his wife got home. The
    pain worsened until he fell out of the recliner in “excruciating pain” at about
    11:00 p.m., screamed to his wife, and lay in a fetal position. Despite the
    progression of symptoms, Ronnie did not call Dr. Thota or seek help and, even
    at 11:00 p.m., refused his wife’s pleas to call a neighbor or 9-1-1. According
    to the ambulance records, it was 12:43 a.m. when they received the call to
    respond.
    Dr. Thota testified that, with the knowledge Ronnie possessed about his
    condition as well as from his prior cardiac catheterization, he should have called
    for help by 6:00 p.m. Dr. Doherty agreed that, with the problems of nausea
    and backache Ronnie was experiencing, sometimes referred to as “flank pain,”
    Ronnie should have called for help at 6:00 p.m. or at least by 9:00 p.m. Dr.
    Doherty further testified on cross-examination that, based upon his review of
    9
    the cath log notes, Dr. Thota’s notes, and those of the nurses who cared for
    Ronnie after the procedure, there was a ninety-nine percent chance that Ronnie
    was not bleeding when he was discharged at 2:40 p.m. Dr. Doherty believed
    the bleeding started at about 9:00 p.m. and stated Ronnie had lost three units
    of blood by the time he got to the operating room. If Ronnie had gone to the
    hospital, sought medical care, or called Dr. Thota at 6:00 p.m., or even by 9:00
    p.m., Dr. Doherty said, he likely would have avoided or lessened all of the
    serious complications, including the shock leading to the coagulopathic state
    that led to the additional problems, including Ronnie’s gangrenous gallbladder,
    which required five months of hospitalization and recovery.
    Dr. McCracken, Appellant’s causation expert, also acknowledged that
    Ronnie probably would not have experienced any of the complications if the
    bleeding had been recognized earlier and treated. Moreover, Dr. Doherty agreed
    that if Ronnie had gone to the hospital at 6:00 p.m., he could have had the
    “bleeder” repaired as it was or intravascularly with a stent, for which Dr. Thota
    had the necessary training.
    I would hold that the trial court correctly submitted the PJC’s standard
    jury question on negligence and contributory negligence in Jury Question No.
    One, rather than an exclusionary instruction on mitigation of damages, that
    10
    there was ample evidence that Ronnie’s failure to follow Dr. Thota’s
    instructions to call or to return to the hospital if he had any problems or pain
    supported the submission of contributory negligence, and that Ronnie’s
    contributory negligence was a proximate cause of his injury.
    III. HARM ANALYSIS
    A.    Casteel “presumed error” analysis does not apply.
    Even if the trial court erred by submitting both the jury question on
    contributory negligence and the instruction on new and independent cause, I
    disagree with the majority’s sua sponte application of the “presumed harm”
    analysis adopted in Crown Life Ins. Co. v. Casteel, 
    22 S.W.3d 378
    (Tex.
    2000).8 In Casteel, the supreme court held that “[w]hen a single broad-form
    liability question erroneously commingles valid and invalid liability theories and
    the appellant’s objection is timely and specific, the error is harmful when it
    cannot be determined whether the improperly submitted theories formed the
    sole basis for the jury’s finding” because the appellant is thereby prevented
    8
    … Appellant has not complained that the submission of contributory
    negligence or the instruction improperly commingled theories or prevented him
    from properly presenting his case on appeal, and neither party has briefed the
    possible application of Casteel to this case. In effect, the majority is reversing
    on unassigned error, issues not raised by the appeal. See Pat Baker Co. v.
    Wilson, 
    971 S.W.2d 447
    , 450 (Tex. 1998) (holding it is “axiomatic that an
    appellate court cannot reverse . . . absent properly assigned error”).
    11
    from properly demonstrating the consequences of the erroneous submission on
    appeal. 
    Id. at 389;
    see also Tex. R. App. P. 44.1(b); 61.1(b).
    In Harris County v. Smith, the court extended Casteel to a broad-form
    question that improperly commingled damage elements when one of those
    elements was supported by no evidence. 
    96 S.W.3d 230
    , 235 (Tex. 2002).
    In Romero v. KPH Consol., Inc., the court further extended Casteel to a single
    broad-form question that included a theory of liability supported by no evidence.
    
    166 S.W.3d 212
    , 227–28 (Tex. 2005).
    The majority says we cannot determine whether the jury truly found Dr.
    Thota not negligent or improperly relied on the contributory negligence
    submission. I disagree. The theories of negligence and contributory negligence
    here were not improperly “commingled.” There were two separate answer lines
    provided to the jury to answer “yes” or “no” as to Dr. Thota and “yes” or “no”
    as to Ronnie. The jury answered “no” as to Dr. Thota and “yes” as to Ronnie.
    In contrast, in Casteel, the jury question instructed the jury on thirteen
    independent grounds of liability but requested only a single 
    answer. 22 S.W.3d at 387
    .   Similarly, in Harris County, the damages question complained of
    instructed the jury that it could consider various elements of damages, including
    an element supported by no evidence, in awarding a single amount of damages.
    12
    96 S.W .3d at 231. Likewise, in Romero, the jury was improperly allowed to
    apportion responsibility among the defendants in a single answer based upon
    either an unchallenged finding of ordinary negligence or an affirmative finding
    on a theory of malicious credentialing for which there was no 
    evidence. 166 S.W.3d at 215
    . The jury’s single answer in each of those cases is what made
    it impossible to determine whether the verdict was based upon the improperly
    submitted theory or element of damages.
    Here, the negligence of Dr. Thota and that of Ronnie were submitted
    “separately,” albeit in the same question. We are thus able to determine that
    the jury’s finding as to Dr. Thota was not based on an improper submission of
    contributory negligence because there are two separate answers. Combining
    two questions into one with separate answer lines simply does not constitute
    a commingling that triggers the “presumed harm” analysis.9
    9
    … In Harris County, the court noted that the Comments to the Pattern
    Jury Charge have long recommended that damage elements be submitted
    “separately” if there is a substantial doubt as to whether there is evidence to
    support an 
    element. 96 S.W.3d at 235
    ; see PJC 8.02 cmt. (suggesting “use
    of a separate answer line for each element of damages might avoid the need for
    a new trial if the appellate court finds that one or more, but not all, of the
    elements lack legal or evidentiary support.”) (emphasis added). Thus, surely
    “separately” may mean either separate jury questions or separate answer lines
    within the same question.
    13
    I also cannot agree that the jury question here submitted two competing
    “theories of liability.” Contributory negligence is not a theory of liability; it is
    an affirmative defense. See Tex. R. Civ. P. 94. The jury question in this case
    was a universally used, standard broad-form submission of only one theory of
    liability—the negligence of Dr. Thota—along with the defense of contributory
    negligence, as recommended by the PJC. Comm. on Pattern Jury Charges,
    State Bar of Texas, Texas Pattern Jury Charges: Medical Malpractice PJC 51.3
    (2006). The supreme court has never extended Casteel to defensive theories.
    In Bed, Bath & Beyond v. Urista, 
    211 S.W.3d 753
    , 757 (Tex. 2006), the
    supreme court noted that it had limited its holdings in Casteel and Harris County
    to “multiple theories of liability or multiple damage elements” and that it had
    “never extended a presumed harm rule to instructions on defensive theories”
    and refused to extend Casteel to the “defensive theory” of unavoidable
    accident, stating: “[U]navoidable accident is not an alternative theory of liability
    but is ‘an inferential rebuttal issue. . . .”
    As to the inferential rebuttal instruction on new and independent cause,
    the majority recognizes that Urista held that improper submission of an
    inferential rebuttal instruction is not subject to the “presumed error” analysis
    under Casteel. But it then concludes that we must nevertheless presume harm
    14
    here because we cannot determine whether the jury improperly relied on the
    new and independent cause instruction alone or combined with the contributory
    negligence submission.     I believe the majority opinion conflicts with both
    Casteel and Urista in applying a “presumed harm” analysis based on some
    hybrid theory.    Even assuming that contributory negligence and new and
    independent cause were both improperly submitted, two errors that do not
    trigger a “presumed harm” analysis do not equal one that does. I think we
    must apply the traditional harm analysis. See Tex. R. App. P. 44.1(a). Under
    that analysis, error in the jury charge requires reversal only if, after considering
    the record as a whole, including the pleadings, the evidence, and the charge in
    its entirety, we conclude that the error probably resulted in an improper verdict.
    See Island Recreational Dev. Corp. v. Republic of Tex. Sav. Ass’n, 
    710 S.W.2d 551
    , 555 (Tex. 1986); Wal-Mart Stores, Inc. v. Redding, 
    56 S.W.3d 141
    , 149
    (Tex. App.—Houston [14th Dist.] 2001, pet. denied).
    B.    The traditional harm analysis applies to the jury question.
    Under Casteel, it is still the law that when questions are submitted in a
    manner that does allow the appellate court to determine that the verdict was
    actually based on a valid liability theory, which is the case here, the error may
    be harmless under the traditional harm 
    analysis. 22 S.W.3d at 389
    .
    15
    “Submisssion of an improper jury question can be harmless error if the jury’s
    answers to other questions render the improper question immaterial.” City of
    Brownsville v. Alvarado, 
    897 S.W.2d 750
    , 752 (Tex. 1995). A jury question
    is immaterial when its answer cannot alter the effect of the verdict. 
    Id. (holding any
    error in submitting deceased’s negligence in jury charge was harmless; once
    jury found defendant not negligent, its finding that deceased was negligent
    could not have altered effect of verdict); see also Boatland of Houston, Inc. v.
    Bailey, 609 S.W .2d 743, 749–50 (Tex. 1980) (holding potentially improper
    submission of defensive issues harmless when jury found for defendant on
    independent grounds); Hernandez v. Atieh, No. 14-06-00582-CV, 
    2008 WL 2133193
    , at *3, 4 (Tex. App.—Houston [14th Dist.] May 20, 2008, no pet.)
    (mem. op.) (holding—when finding of no liability of defendant supported by
    evidence—once jury found defendant not negligent, submission of additional
    person as responsible third party in negligence question harmless); Hutchison
    v. Pharris, 
    158 S.W.3d 554
    , 567–68 (Tex. App.—Fort Worth 2005, no pet.)
    (holding finding of claimants’ contributory negligence harmless when jury’s
    failure to find defendants’ negligence was proximate cause of injury was
    supported by evidence).
    C.    The traditional harm analysis applies to jury instruction.
    16
    Likewise, to determine whether submission of an instruction probably
    caused an improper judgment and was, therefore, harmful error, we must
    examine the entire record.     
    Urista, 211 S.W.3d at 757
    (citing Timberwalk
    Apartments Partners, Inc. v. Cain, 
    972 S.W.2d 749
    , 756 (Tex. 1998));
    Quantum Chem. Corp. v. Toennies, 
    47 S.W.3d 473
    , 480 (Tex. 2001); see also
    Tex. R. App. P. 44.1(a).      Specifically, when the record provides “no clear
    indication” that the jury relied upon an improper inferential rebuttal instruction,
    Urista instructs us that we must ordinarily conclude the error is 
    harmless. 211 S.W.3d at 758
    –59. When, as in this case, the jury makes a negative finding
    as to liability and, under the evidence, could reasonably have concluded that the
    plaintiff failed to carry its burden to establish defendant’s negligence rather than
    relying upon such an instruction, submission of an improper inferential rebuttal
    instruction is ordinarily harmless error. 
    Id. at 757–59
    (holding unavoidable
    accident submission harmless when cross-examination discredited plaintiff’s
    claims and evidence failed to indicate result would have been different absent
    instruction); Reinhart v. Young, 
    906 S.W.2d 471
    , 473 (Tex. 1995) (holding
    unavoidable accident instruction harmless when ample evidence supported
    finding of no negligence by defendant, witnesses did not refer to term, counsel
    made little mention of it in closing, sudden emergency was also submitted
    17
    without objection, and verdict was unanimous); Torres v. Tessier, 
    231 S.W.3d 60
    , 64 (Tex. App.—Houston [14th Dist.] 2007, no pet.) (holding sudden
    emergency instruction harmless when jury could reasonably have failed to find
    causation or damages based on credibility determinations regarding evidence
    without regard to instruction); see also 
    Eoff, 811 S.W.2d at 193
    (holding new
    and independent cause instruction harmless when jury found plaintiff 100
    percent contributorily negligent).
    D.    Any charge error was harmless in light of evidence supporting
    jury’s finding of “no” as to negligence of Dr. Thota and in light of
    the entirety of the record.
    There was evidence from the medical records as well as the testimony of
    Dr. Thota, with which Dr. Doherty agreed, that good “hemostatis” was most
    likely obtained—meaning the initial bleeding from the catheterization stick had
    been stopped by applied pressure and a blood clot had formed, that Ronnie had
    no pain and a good pulse, indicating that Ronnie was stable by the time he left
    the hospital at 2:40 p.m., and that the “injury” complained of—extensive
    bleeding, shock, and multi-organ failure—did not begin until several hours after
    he left the hospital. Dr. Thota testified that the extensive bleeding caused by
    the clot being dislodged was a complication he could not predict at the
    puncture site where the clot had formed earlier. Dr. Doherty agreed that there
    18
    was an “event” that caught Ronnie’s attention at 6:00 p.m. and a progressive
    deterioration after that time.
    When    Ronnie    returned   to   the   hospital’s   emergency    room     at
    approximately 1:15 a.m., he was seen by Dr. Thota’s partner, Dr. Sudarshan.
    A CT scan was done, described by Dr. Sudarshan in his report as showing
    apparent bleeding from an external iliac artery puncture site but with a finding
    that the site was at “about” the iliac ligament. The operative report of Dr.
    Walker, who operated on Ronnie that night, described a “high tear” of the right
    external iliac artery that had bled into the retroperitoneal cavity, forming a large
    hematoma. Neither Dr. Sudarshan nor Dr. Walker testified. The experts who
    did testify based their opinions largely on their respective interpretations of Dr.
    Sudarshan’s and Dr. Walker’s written reports.
    The testimony of those experts conflicted. Dr. Doherty testified on behalf
    of Appellant that the standard of care for the cardiac catheterization was to
    insert the needle and catheter into the right femoral artery below the inguinal
    ligament. In Dr. Doherty’s opinion, Dr. Thota made the puncture for the cardiac
    catheterization in the wrong location, above the inguinal ligament into the right
    external iliac artery, rather than below that ligament into the femoral artery. Dr.
    Doherty supported his opinion by the fact of the bleeding into the
    19
    retroperitoneal area, which could occur with a puncture that is too high, rather
    than into the groin, where the bleeding could have been discovered quickly and
    corrected.
    Dr. Thota testified on his own behalf that he met the standard of care,
    that he did not and could not make a stick into the external iliac artery because
    he would not feel the pulse at that point. See Hersch v. Hendley, 
    626 S.W.2d 151
    , 155 (Tex. App.—Fort Worth 1981, no writ) (holding defendant physician’s
    own testimony may establish standard of care). He further testified that a
    retroperitoneal bleed can happen with a femoral artery stick as well as an iliac
    artery stick. He pointed out that Dr. Sudashan’s finding that the puncture site
    was at “about the inguinal ligament” would indicate that the puncture site was
    correct, and further testified that Dr. Walker’s report was ambiguous in
    reference to what he repaired and where, referring to the inguinal “area”—a
    vast area that covers the groin—rather than “ligament.”          Dr. Thota further
    pointed out that Dr. Walker’s operative report did not describe the “tear” or
    how he repaired it. Dr. Doherty also admitted that Dr. Walker’s operative report
    stated that he had to divide the inguinal ligament before he could actually see
    the site of the tear in the artery. Dr. Thota testified that, based on that location
    20
    of the site of the bleeding, i.e., under the inguinal ligament, the puncture site
    for the cathetrization was in the correct area.
    Both Dr. Thota and Dr. Doherty testified that, if there had been an
    improper high stick preventing adequate hemostasis, Ronnie would likely have
    developed signs of bleeding before discharge. But Ronnie remained stable and
    experienced no pain or signs of bleeding after the procedure and for several
    hours after his discharge.      Dr. Thota testified, and even Dr. Doherty
    acknowledged, that the objective evidence in the records indicated that Ronnie
    was not bleeding at the time he was discharged, from which the jury could
    reasonably infer that the puncture location was not improper.
    As in many medical malpractice cases, the record consists of conflicting
    opinions of experts.   See, e.g., Cruz ex rel. Cruz v. Paso Del Norte Health
    Found., 
    44 S.W.3d 622
    , 646 (Tex. App.—El Paso 2001, pet. denied) (holding
    failure to find nurse negligent not against overwhelming weight of evidence
    when opinions of experts for both parties conflicted); Magee v. Ulrey, 
    993 S.W.2d 332
    , 336 (Tex. App.—Houston [14th Dist.] 1999, no pet.) (holding
    failure to find physician negligent not against overwhelming weight of evidence
    when jury could have believed defense expert); Crawford v. Hope, 
    898 S.W.2d 937
    , 942–43 (Tex. App.—Amarillo 1995, writ denied) (noting “battle of
    21
    experts” in suit against physician and holding weight of evidence was for jury
    to evaluate and jury’s failure to find proximate cause not against overwhelming
    weight of evidence). In a battle of competing experts, it is the sole prerogative
    of the jury to determine the credibility and weight of the witnesses. 
    Cruz, 44 S.W.3d at 646
    .
    Because of (1) the ambiguity of Dr. Walker’s report, (2) the fact that Dr.
    Doherty’s opinions were based primarily on that report, and (3) the conflicting
    testimony of Dr. Thota and Dr. Doherty based on their respective interpretations
    of the report as to whether Dr. Thota did or did not place the needle and
    catheter in the wrong location, the jury could reasonably have resolved the
    credibility issues by disbelieving Dr. Doherty’s opinions and by believing Dr.
    Thota’s and could reasonably have found that Appellant failed to carry her
    burden of proof on establishing the negligence of Dr. Thota. Once the jury
    answered “no” that any negligence of Dr. Thota proximately caused Ronnie’s
    injury, he was exonerated, and neither a “yes” nor a “no” answer as to the
    contributory negligence of Ronnie could have altered the verdict. See 
    Alvarado, 897 S.W.2d at 752
    –53.
    Moreover, nothing in the record “clearly indicates” that the jury relied
    upon the new and independent cause instruction.          The jury was free to
    22
    disbelieve the expert testimony of Dr. Doherty, to accept that of Dr. Thota, and
    to conclude that Dr. Thota did not incorrectly place the puncture site for the
    catheterization. We presume that the jury decided all questions of credibility
    and conflicts in the evidence in favor of the verdict if reasonable jurors could
    have done so. 
    Torres, 231 S.W.3d at 63
    –64 (citing City of Keller v. Wilson,
    
    168 S.W.3d 802
    , 819 (Tex. 2005)). The jury could reasonably have found Dr.
    Thota not negligent without reaching the issue of proximate cause, in which
    event the jury would not have relied on the new and independent cause
    instruction because that instruction relates only to proximate cause.          See
    Arguelles v. Kellogg Brown & Root, Inc., 
    222 S.W.3d 714
    , 727 (Tex.
    App.—Houston [14th Dist.] 2007, no pet.) (noting “new and independent
    cause” is component of proximate cause). Additionally, the jury’s answer of
    “yes” as to Ronnie’s contributory negligence as a proximate cause negates any
    reliance by the jury on the instruction. See 
    Eoff, 811 S.W.2d at 193
    (holding
    new and independent cause instruction contemplates independent force rather
    than negligence of parties was responsible for injuries). Finally, counsel for Dr.
    Thota never even mentioned the instruction in his closing argument. I would
    hold there is no indication, much less any “clear indication,” that the jury relied
    on that instruction in reaching its verdict. See 
    Urista, 211 S.W.3d at 758
    –59.
    23
    Thus, even if there was charge error, under the proper harm analysis I would
    hold that the record fails to establish that any such error probably resulted in
    an improper judgment.     See Tex. R. App. P. 44.1(a).      I would affirm the
    judgment of the trial court.
    ANNE GARDNER
    JUSTICE
    DELIVERED: November 20, 2008
    24