Mitchell, L. v. E. Shikora, D.O., Aplts. , 209 A.3d 307 ( 2019 )


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  •                                  [J-77-2018]
    IN THE SUPREME COURT OF PENNSYLVANIA
    WESTERN DISTRICT
    SAYLOR, C.J., BAER, TODD, DONOHUE, DOUGHERTY, WECHT, MUNDY, JJ.
    LANETTE MITCHELL,                            :   No. 55 WAP 2017
    :
    Appellee                 :   Appeal from the Order of the Superior
    :   Court entered May 5, 2017 at No. 384
    :   WDA 2016, reversing the Judgment of
    v.                              :   the Court of Common Pleas of
    :   Allegheny County, Civil Division,
    :   entered February 22, 2016 at No. GD
    EVAN SHIKORA, D.O., UNIVERSITY OF            :   13-023436, and remanding.
    PITTSBURGH PHYSICIANS D/B/A                  :
    WOMANCARE ASSOCIATES, MAGEE                  :   ARGUED: October 23, 2018
    WOMENS HOSPITAL OF UPMC,                     :
    :
    Appellants               :
    OPINION
    JUSTICE TODD                                      DECIDED: JUNE 18, 2019
    In this appeal by allowance, we consider the admissibility of evidence regarding
    the risks and complications of a surgical procedure in a medical negligence case. For the
    reasons that follow, and consistent with our recent decision in Brady v. Urbas, 
    111 A.3d 1155
    (Pa. 2015), we find that evidence of the risks and complications of a surgery may
    be admissible at trial. Thus, we reverse the order of the Superior Court.
    In May 2016, Appellant, Dr. Evan Shikora, was to perform a laparoscopic
    hysterectomy on Appellee Lanette Mitchell. Dr. Shikora, assisted by resident physician,
    Dr. Karyn Hansen, began the operation by making an incision into Mitchell’s abdomen;
    however, while they were opening the sheath of the peritoneum,1 the doctors detected
    fecal odor.2 Dr. Shikora realized that Mitchell’s colon had been severely cut; thus, he
    abandoned the hysterectomy and consulted with a general surgeon, Dr. Anita
    Courcoulas, who performed an emergency loop ileostomy,3 which ultimately was
    successful in repairing the bowel. Mitchell, however, was required to wear an external
    ileostomy pouch for a short period.
    In December 2016, Mitchell filed the instant medical negligence action against Dr.
    Shikora, University of Pittsburgh Physicians d/b/a WomanCare Associates, and Magee
    Women’s Hospital of UPMC (collectively, “Appellants”). Mitchell alleged Dr. Shikora
    breached his duty of care by, inter alia, “failing to take reasonable precautions to prevent
    [Mitchell] from suffering complications, injuries and/or damages in connection with the
    surgery.” Complaint, 12/6/13, ¶ 25(b). Mitchell’s theory was that Dr. Shikora’s failure to
    identify her colon before making an incision into her abdomen constituted a breach of the
    applicable medical standard of care. Mitchell did not plead a claim for battery or lack of
    informed consent.
    Prior to trial, Mitchell filed a motion in limine to exclude evidence of her informed
    consent regarding the risks of the procedure, which included perforation of the colon, as
    well as evidence of the risks themselves, as irrelevant, unfairly prejudicial, or confusing.
    Following a hearing, the trial court granted Mitchell’s motion with respect to evidence of
    1 The peritoneum is a membrane that lines the abdominal cavity and covers the organs
    in the abdomen. Stedman’s Medical Dictionary 1353 (27th ed. 2000).
    2 While both physicians were involved in the surgery, it appears Dr. Hansen made the
    incision. N.T., 2/2/16, at 261.
    3 An ileostomy is a surgical procedure used to create an opening in the abdomen in which
    a piece of lowest part of the small intestine (the ileum) is “brought outside the abdominal
    wall to create a stoma through which digested food passes into an external pouching
    system.”      United Ostomy Association of America, Inc., Ileostomy Facts,
    https://www.ostomy.org/ileostomy/. A temporary ileostomy, usually constructed with a
    “loop” stoma, is used when a surgical site requires time to heal. 
    Id. [J-77-2018] -
    2
    her informed consent regarding the risks of the procedure, as she had not raised such a
    claim. However, with respect to whether a bowel injury was a known risk or complication
    of the surgery, i.e., with respect to the allowance of evidence of the risks or complications
    themselves, the trial court denied the motion to preclude such evidence.
    The parties proceeded to a jury trial before the Honorable Paul F. Lutty, Jr. Mitchell
    offered testimony from a medical expert, Dr. Vadim Morozov, who explained the anatomy
    of the abdomen, testified regarding performing a proper and safe laparoscopic
    hysterectomy, which he stated included identification of the body structure before making
    an incision, and provided his opinion that cutting into the colon without proper
    identification of the anatomy below the incision breached the relevant standard of care.
    N.T., 2/1/16, at 183-85, 202-04, 245-46. Mitchell also called Dr. Hansen, and testified
    herself. Mitchell was not questioned regarding her pre-operation discussions with Dr.
    Shikora as to the risks and potential complications of the surgery, or the informed-consent
    process.
    For Appellants, Dr. Shikora testified, acknowledging that injury to the bowel is a
    recognized complication of surgery and that the riskiest part of the procedure is entry into
    the abdominal cavity, “[b]ecause it is blind” and the surgeon “can’t see beyond the skin
    and the layers below it.” N.T., 2/4/16, at 593. Appellants also provided the testimony of
    an expert, Dr. Charles Ascher-Walsh, who offered that Dr. Shikora and Dr. Hansen
    complied with the standard of care applicable to laparoscopic hysterectomies; he testified
    that, in making the initial incision, a physician often cannot see through the tissue, and,
    thus, the surgeon does not know what is behind the peritoneum, and that this is when
    complications may occur, which can be unavoidable and can occur absent surgical
    negligence. N.T., 2/5/16, at 694-95, 697, 701-02. Thus, Appellants introduced evidence
    of the risks of the procedure, including perforation of the colon, which may occur with a
    [J-77-2018] - 3
    properly performed laparoscopic hysterectomy. Furthermore, according to Appellants,
    Mitchell’s colon was in an unanticipated location in the middle of her abdomen, which led
    to it being cut. Following closing arguments, the jury returned a verdict for Appellants.
    Mitchell filed a post-trial motion for a new trial on the ground that the trial court
    erred in denying her motion in limine in part. The trial court denied the motion, and
    Mitchell appealed. In its ensuing Pa.R.A.P. 1925(a) opinion, the trial court justified its
    ruling on the ground that, in Brady v. Urbas, 
    111 A.3d 1155
    (Pa. 2015), discussed in detail
    below, this Court held that evidence of a patient’s informed consent is generally irrelevant
    in medical negligence actions unless lack of consent is at issue, but evidence of the risks
    themselves may be relevant to establish the applicable standard of care, or to establish
    whether the physician breached the same. Specifically, the trial court explained that the
    evidence that the risks of a laparoscopic hysterectomy included perforation of the colon
    was relevant to establish the standard of care and whether Dr. Shikora breached that
    standard.
    In a unanimous, published opinion, authored by the Honorable John L. Musmanno,
    a three-judge panel of the Superior Court reversed and remanded for a new trial. Mitchell
    v. Shikora, 
    161 A.3d 970
    (Pa. Super. 2017). After reciting the applicable abuse-of-
    discretion standard of review, the court looked to the relevant law regarding the admission
    of known risks and complications evidence as set forth in our decision in Brady. The
    Superior Court quoted operative language from Brady, which considered whether
    informed-consent evidence was probative of the appropriate standard of care or the
    breach thereof. Recognizing that the Brady Court rejected the notion that informed-
    consent information is always irrelevant, the court nevertheless determined that, “in a trial
    on a malpractice complaint that only asserts negligence, and not lack of informed consent,
    evidence that a patient agreed to go forward with the operation in spite of the risks of
    [J-77-2018] - 4
    which she was informed is irrelevant and should be excluded.” 
    Id. at 973
    (quoting 
    Brady, 111 A.3d at 1162-63
    ).
    After surveying the expert testimony offered by both parties, the court found that
    the trial court erred in denying Mitchell’s motion in limine with respect to evidence of the
    risks and complications of the procedure, reasoning that such evidence was irrelevant,
    misleading, and confusing:
    Here, while evidence of risks and complications of a
    surgical procedure may be admissible to establish the
    relevant standard of care, in this case, such evidence was
    irrelevant in determining whether [Appellants], specifically Dr.
    Shikora, acted within the applicable standard of care. . . . The
    fact that one of the risks and complications of the laparoscopic
    hysterectomy, i.e., the perforation of the bowel, was the injury
    suffered by Mitchell does not make it more or less probable
    that Dr. Shikora conformed to the proper standard of care for
    a laparoscopic hysterectomy and was negligent. . . .
    Moreover, the evidence would tend to mislead and/or
    confuse the jury by leading it to believe that [Mitchell’s] injuries
    were simply the result of the risks and complications of the
    surgery.
    
    Id. at 975
    (citations omitted).
    The court further found that the trial court’s error resulted in prejudice, observing
    that the evidence was central to Appellants’ theory of the case, as demonstrated by their
    opening and closing statements.          Thus, the court concluded that the risks and
    complications evidence was irrelevant to the issue of whether Appellants’ treatment of
    Mitchell met the appropriate standard of care, and remanded the matter for a new trial.
    In response to Appellant’s petition, we granted allocatur limited to the issue, as
    framed by Appellants, of “[w]hether the Superior Court’s holding directly conflicts with this
    Honorable Court’s holdings in Brady v. Urbas, 
    111 A.3d 1155
    (Pa. 2015), which permits
    [J-77-2018] - 5
    evidence of general risks and complications in a medical negligence claim?” Mitchell v.
    Shikora, 
    174 A.3d 573
    , 573-74 (Pa. 2017) (order).
    Appellants argue that evidence of the risks and complications of a procedure is
    relevant and admissible in a medical negligence case, as explained in Brady, because it
    informs the inquiry regarding the standard of care and whether it was breached, as well
    as causation.      Specifically, Appellants contend that evidence of the risks and
    complications is necessary to explain a physician’s decision-making with respect to his or
    her actions, which in turn informs the standard of care. According to Appellants, here,
    the first incision in laparoscopic surgery involves an increased risk of complications as
    the initial incision is undertaken “blind;” thus, it follows that, if a bowel injury during
    abdominal entry is a well recognized risk or complication of laparoscopic surgery, it is less
    likely that the standard of care was breached.           Appellants submit that, given that
    complications may arise even when proper care is provided, evidence of risks and
    complications must be presented to the jury to allow for a complete picture of the
    applicable standard of care.
    As to causation, Appellants maintain that defendants in a negligence action are
    entitled to offer evidence as to alternative causes of injury, and, here, it is permissible for
    a physician to introduce evidence suggesting another cause of the injury, such as routine
    medical complications. Appellants stress that a physician is neither a warrantor of a cure,
    nor a guarantor of a result. Thus, Appellants offer that evidence of risks or complications
    addresses not only whether a physician’s conduct fell below the standard of care and
    caused injury, but is relevant to dispel a finding of negligence with respect to an injury
    which may have occurred despite the exercise of reasonable care. Appellants urge that
    prohibiting such explanatory evidence would prevent a physician from presenting
    alternative causes, and, in effect, transform physicians into guarantors of a cure.
    [J-77-2018] - 6
    Appellants further argue that the Superior Court misunderstood the holding of
    Brady and erroneously conflated two distinct concepts: evidence of patient consent
    (which is not admissible in a pure medical negligence case) and evidence of general
    medical risks and complications (which is admissible). Appellants assert that the Brady
    Court did not hold that evidence of surgical risks and complications is irrelevant or cannot
    be considered. Rather, according to Appellants, Brady stands for the proposition that, in
    medical negligence cases, risks and complications evidence is relevant, while patient
    consent evidence is not relevant. Here, Appellants claim the trial court properly applied
    Brady, excluding the informed-consent evidence, but permitting expert testimony
    regarding risks and complications.      Finally, Appellants contend that policy concerns
    require the reversal of the Superior Court, because its decision undermines the tenet that
    physicians are not guarantors of a cure, and effectively imposes strict liability upon
    medical professionals. This, according to Appellants, will act to discourage high-risk
    procedures and will impact other legal doctrines, such as the “two schools of thought”
    doctrine4 and res ipsa loquitur claims.5 6
    4 The “two schools of thought” doctrine serves as a defense to a claim of negligence.
    Specifically, “[w]here competent medical authority is divided, a physician will not be held
    responsible if in the exercise of his judgment he followed a course of treatment advocated
    by a considerable number of recognized and respected professionals in his given area of
    expertise.” Jones v. Chidester, 
    610 A.2d 964
    , 969 (Pa. 1992).
    5 The doctrine of res ipsa loquitur allows an inference of negligence where it can be
    established that an event would not ordinarily occur absent negligence, and may establish
    whether a medical professional is responsible for causing an injury. Toogood v. Rogal,
    
    824 A.2d 1140
    , 1148-49 (Pa. 2003) (plurality).
    6 A variety of medical organizations in Pennsylvania, including the American Medical
    Association and the Pennsylvania Orthopaedic Society, among others, filed amicus briefs
    in support of Appellants, largely reiterating their arguments. Amici also indicate that the
    Superior Court’s decision could adversely impact healthcare in Pennsylvania by deterring
    healthcare providers from providing higher risk healthcare services, or new healthcare
    services, and from treating high-risk patients, as well as exposing healthcare providers to
    a vast new swath of liability, thereby resurrecting the concerns that led to the MCARE Act
    and other tort reform measures.
    [J-77-2018] - 7
    Mitchell counters that, under Brady, informed-consent evidence is generally
    inadmissible in medical malpractice cases, and she characterizes evidence of the risks
    and complications of a procedure as such evidence. Appellee’s Brief at 17. Mitchell
    maintains that Appellants overstate their argument by claiming the Superior Court in this
    matter determined that risks and complications evidence was always inadmissible.
    Rather, Mitchell asserts that the Superior Court’s decision is entirely consistent with
    Brady, as such admissibility decisions are to be made on a case-by-case basis, and, here,
    the Superior Court determined that risks and complications evidence was not probative
    of whether Appellants treatment of Mitchell fell below the standard of care. Mitchell adds
    that the Superior Court properly found that testimony regarding risks and complications
    would mislead and confuse the jury. According to Mitchell, evidence about complications
    is not probative of whether her bowel injury occurred in the absence of negligence, as
    generalized risks and complication studies do not usually indicate what percentage of
    complications resulted from negligent care. Mitchell presses that a jury should not be
    allowed to conclude that the occurrence of a known complication demonstrates the
    absence of negligence in a particular case.
    Mitchell also rejects Appellants’ assertion that informing jurors of risks of a certain
    procedure would facilitate their understanding of the overall technical challenges inherent
    in such surgery. Mitchell initially asserts such argument is waived; as to its merits, she
    contends an overall understanding of the risks is irrelevant, as she had a right to expect
    that the surgery would be performed in accordance with the applicable standard of care,
    whether during a high-risk stage of the surgery or not. Mitchell claims that she was
    prejudiced, and the jurors were misled, when they were told that incision into the abdomen
    [J-77-2018] - 8
    was one of the riskier parts of the surgery and that a bowel injury was a known
    complication that could happen in the absence of negligence.7 8
    As this case involves the admission of evidence, a brief recitation of the law in this
    area is helpful. Generally, relevant evidence is admissible and irrelevant evidence is
    inadmissible. Evidence is relevant if it has “any tendency to make a fact [of consequence]
    more or less probable than it would be without the evidence.” Pa.R.E. 401. The threshold
    for relevance is low given the liberal “any tendency” prerequisite. 
    Id. (emphasis added).
    Relevant evidence “is admissible, except as otherwise provided by law.” Pa.R.E. 402.
    One such exception is that relevant evidence may be excluded “if its probative value is
    outweighed by a danger of one or more of the following: unfair prejudice, confusing the
    issues, misleading the jury, undue delay, wasting time, or needlessly presenting
    cumulative evidence.” Pa.R.E. 403.
    Decisions regarding the admissibility of evidence are vested in the sound
    discretion of the trial court, and, as such, are reviewed for an abuse of discretion. See
    Commonwealth v. Wright, 
    78 A.3d 1070
    , 1086 (Pa. 2013). An abuse of discretion occurs
    where the trial court “reaches a conclusion that overrides or misapplies the law, or where
    the judgment exercised is manifestly unreasonable, or is the result of partiality, prejudice,
    bias, or ill will.” 
    Id. at 1080.
    To the degree the issue of whether the law has been
    7 Mitchell also argues that Appellants improperly raised issues of whether the Superior
    Court created a strict liability standard in medical malpractice cases and whether it
    usurped the trial court’s discretion, as beyond our limited grant of allocatur. We disagree,
    and find that these arguments are related, albeit tangentially, to the central issue on which
    we granted review. In conjunction therewith, Mitchell’s Application for Leave to File Post-
    Submission Communication, which raises these same contentions, is hereby denied.
    8 The Pennsylvania Association for Justice and American Association for Justice filed an
    amicus brief in support of Mitchell, largely reiterating her arguments. They also advance
    an argument that, although evidence of the risks of a procedure may be relevant to the
    issues of standard of care, breach, or causation, it is prejudicial, as it confuses the jury.
    Finally, amici challenge Appellants’ and their associated amici’s policy arguments,
    reasoning that the Superior Court’s decision is a boon to patient safety, decreases overall
    healthcare system liability, and stems the cost-shifting of medical errors to victims.
    [J-77-2018] - 9
    misapplied involves a purely legal question, it is reviewed de novo. See Hoy v. Angelone,
    
    720 A.2d 745
    , 750 (Pa. 1998).
    In order to establish a prima facie case of malpractice, the plaintiff must establish:
    (1) a duty owed by the physician to the patient; (2) a breach of that duty; (3) that the
    breach of duty was the proximate cause of the harm suffered by the patient; and (4) that
    the damages suffered were a direct result of that harm. See Hightower-Warren v. Silk,
    
    698 A.2d 52
    , 54 (Pa. 1997). Stated another way, to prevail on a claim of medical
    negligence, the plaintiff must prove, inter alia, that the defendant's treatment fell below
    the appropriate standard of care ― that is, varied from accepted medical practice. See
    Scampone v. Highland Park Care Ctr., 
    57 A.3d 582
    , 596 (Pa. 2012); see also 
    Toogood, 824 A.2d at 1145
    (“[M]edical malpractice can be broadly defined as the unwarranted
    departure from generally accepted standards of medical practice resulting in injury to a
    patient[.]”).
    A plaintiff in a medical negligence matter is required to present an expert witness
    who will testify, to a reasonable degree of medical certainty, regarding the standard of
    care (duty); that the acts of the physician deviated from the standard or care (breach);
    and that such deviation was the proximate cause of the harm suffered. Hightower-
    
    Warren, 698 A.2d at 54
    .        Expert testimony in support of the plaintiff's claim is an
    indispensable requirement in establishing a plaintiff’s right of action, as the treatment and
    injury typically involved are such that the common knowledge or experience of a
    layperson is insufficient to form the basis for passing judgment. Collins v. Hand, 
    246 A.2d 398
    , 401 (Pa. 1968). We must therefore consider whether risks and complications
    evidence is probative of any of the above requirements.
    Initially, we note that, “a physician is neither a warrantor of a cure nor a guarantor
    of the result of his treatment.” 
    Collins, 246 A.2d at 400-01
    ; 40 P.S. § 1303.105 (“In the
    [J-77-2018] - 10
    absence of a special contract in writing, a health care provider is neither a warrantor nor
    a guarantor of a cure.”). Specifically, there is no “presumption or inference of negligence
    merely because a medical procedure terminated in an unfortunate result which might
    have occurred despite the exercise of reasonable care.”          
    Collins, 246 A.2d at 401
    ;
    
    Toogood, 824 A.2d at 1150
    (“There is no requirement that [a physician] be infallible, and
    making a mistake is not negligence as a matter of law. In order to hold a physician liable,
    the burden is upon the plaintiff to show that the physician failed to employ the requisite
    degree of care and skill.”). Indeed, the idea that complications may arise through no
    negligence of a physician is so ingrained in our jurisprudence that it is often included as
    part of the instructions to the jury. See Pennsylvania Suggested Civil Jury Instruction
    14.10, subcommittee note (“In the absence of a special contract, a physician is neither a
    warrantor of a cure, nor a guarantor of the result of his treatment” (citation omitted)).
    Furthermore, evidence of an individual’s consent to undergo surgery is not
    evidence of consent to a physician acting below the accepted standard of care: “It has
    long been the law in Pennsylvania that a physician must obtain informed consent from a
    patient before performing a surgical or operative procedure. . . . The rationale underlying
    requiring informed consent for a surgical or operative procedure and not requiring
    informed consent for a non-surgical procedure is that the performance of a surgical
    procedure upon a patient without his consent constitutes a technical assault or a battery
    because the patient is typically unconscious and unable to object.” Morgan v. MacPhail,
    
    704 A.2d 617
    , 619-20 (Pa. 1997). Thus, an action asserting a lack of informed consent
    is distinct from a claim of medical negligence. That being the case, admitting evidence
    that a patient is informed of certain risks in a pure negligence action can erroneously
    suggest to the jury that the patient has consented to negligence. Additionally, such
    [J-77-2018] - 11
    evidence can confuse the jury and cause it to stray from assessing the central question
    of whether the physician’s actions conformed to the applicable standard of care.
    Our Court addressed these legal principles in our 2015 opinion in Brady, authored
    by Chief Justice Saylor, and joined by all participating Justices. In Brady, Dr. William
    Urbas performed four operations on the second toe of Maria Brady’s right foot. The first
    surgery was successful; however, the three follow-up procedures resulted in her toe being
    significantly shorter. Brady later alleged that Dr. Urbas failed to determine the cause of
    her deformed toes and negligently treated her by performing improper procedures. In
    doing so, Brady asserted a claim of medical negligence, but did not sue for battery or for
    a lack of informed consent. Prior to trial, Brady filed a motion to exclude all evidence
    related to her informed consent to the surgery on the ground that it was irrelevant, unfairly
    prejudicial, or confusing. The trial court denied Brady’s motion, reasoning that the risks
    of the surgeries were relevant to the issue of negligence and admitting evidence regarding
    the risks was not unfairly prejudicial or confusing. The jury returned a defense verdict,
    finding that Dr. Urbas was not negligent.
    The Superior Court vacated and remanded for a new trial, adopting a per se rule,
    and reasoning that evidence of informed consent is always irrelevant to the issue of
    negligence and could suggest to the jury that consent to the surgery was tantamount to
    consent to the injury which resulted from that surgery, and that, in the alternative, such
    evidence could mislead the jury by leading it to believe that the plaintiff’s injuries were
    simply a risk of the surgeries, regardless of negligent conduct by Dr. Urbas. Dr. Urbas
    sought, and we granted, review.
    On appeal, we held that, although evidence of a patient’s informed consent to a
    procedure is generally irrelevant to the issues of standard of care and breach of duty and
    may confuse the jury, evidence of the risks of the procedure themselves may be relevant
    [J-77-2018] - 12
    and admissible. Specifically, our Court made a distinction between the admission of
    informed-consent evidence ― such as consent forms, or communications between a
    physician and a patient regarding the purpose, nature, and risks of surgery ― and the
    admission of evidence of the risks and complications of surgery:
    To prevail on a claim of medical negligence, the plaintiff must
    prove that the defendant's treatment fell below the appropriate
    standard of care. (“[M]edical malpractice can be broadly
    defined as the unwarranted departure from generally
    accepted standards of medical practice resulting in injury to a
    patient[.]”). We therefore consider whether informed-consent
    evidence is probative of that question. In undertaking this
    inquiry, it is important to recognize that such information is
    multifaceted: it reflects the doctor's awareness of possible
    complications, the fact that the doctor discussed them with the
    patient, and the patient's decision to go forward with treatment
    notwithstanding the risks.
    Some of this information may be relevant to the question of
    negligence if, for example, the standard of care requires that
    the doctor discuss certain risks with the patient. Evidence
    about the risks of surgical procedures, in the form of
    either testimony or a list of such risks as they appear on
    an informed-consent sheet, may also be relevant in
    establishing the standard of care. In this regard, we note
    that the threshold for relevance is low[.] Accordingly, we
    decline to endorse the Superior Court's broad
    pronouncement to the degree it may be construed to hold
    that all aspects of informed-consent information are
    always “irrelevant in a medical malpractice case.”
    Still, the fact that a patient may have agreed to a procedure in
    light of the known risks does not make it more or less probable
    that the physician was negligent in either considering the
    patient an appropriate candidate for the operation or in
    performing it in the post-consent timeframe. Put differently,
    there is no assumption-of-the-risk defense available to a
    defendant physician which would vitiate his duty to provide
    [J-77-2018] - 13
    treatment according to the ordinary standard of care. The
    patient's actual, affirmative consent, therefore, is
    irrelevant to the question of negligence. Moreover, and as
    the trial court observed, assent to treatment does not amount
    to consent to negligence, regardless of the enumerated risks
    and complications of which the patient was made aware. That
    being the case, in a trial on a malpractice complaint that
    only asserts negligence, and not lack of informed
    consent, evidence that a patient agreed to go forward
    with the operation in spite of the risks of which she was
    informed is irrelevant and should be excluded. . . .
    Evidence of the patient's consent also tends to confuse the
    issue because, . . . the jury might reason that the patient's
    consent to the procedure implies consent to the resultant
    injury, and thereby lose sight of the central question pertaining
    to whether the defendant's actions conformed to the
    governing standard of care. . . .
    Accordingly, we hold that evidence that a patient affirmatively
    consented to treatment after being informed of the risks of that
    treatment is generally irrelevant to a cause of action sounding
    in medical negligence.
    
    Brady, 111 A.3d at 1161-64
    (emphasis added) (citations omitted).
    As becomes evident from the above quoted passage, our Court in Brady spoke in
    terms of two discrete categories of evidence: (1) informed-consent evidence; and (2)
    risks and complications evidence. As to the first category, the Court plainly held that
    manifestations of a patient's actual, affirmative consent to surgery, and the risks thereof,
    are irrelevant to the question of negligence. 
    Brady, 111 A.3d at 1162
    . Thus, where a
    patient’s action is limited to medical negligence, and not a lack of informed consent, all
    evidence that a patient agreed to go forward with the operation, in spite of the risks of
    which she was informed, is irrelevant and should be excluded. 
    Id. at 1162-63.
    However, the Court contrasted this with other types of evidence, such as evidence
    of risks and complications. Indeed, the Brady Court specifically rejected the Superior
    [J-77-2018] - 14
    Court’s per se rule that “all aspects of informed-consent information are always ‘irrelevant
    in a medical malpractice case.’”      
    Id. at 1162.
       Rather, evidence of the risks and
    complications of a surgical procedure, “in the form of either testimony or a list of such
    risks as they appear on an informed-consent sheet” could be “relevant in establishing the
    standard of care.” Id.9
    The Superior Court’s approach in the matter sub judice is inconsistent with our
    decision in Brady, as it blurred the distinction between informed-consent evidence ―
    showing a patient's actual, affirmative consent to surgery ― and evidence regarding the
    risks and complications of medical procedures. Contrary to Brady, the Superior Court
    suggested that all evidence of the risks of a procedure is forbidden, and, in doing so,
    conflated Brady’s bar on evidence of informed consent to the risks of a procedure with a
    bar on evidence of the risks of a procedure itself. Thus, the Superior Court went beyond
    Brady’s limit on informed-consent evidence by barring evidence of complications known
    to be a risk even of non-negligent treatment. The Superior Court appropriately recited
    the core analysis in Brady – that evidence of the risks of a procedure may be relevant in
    particular cases.   Yet, the court nevertheless effectively set forth a bright-line rule,
    determining in this case that evidence that one of the risks of a laparoscopic hysterectomy
    is perforation of the colon, even if the surgery is performed with due care, is irrelevant to
    the issues of standard of care and breach of duty. See 
    Mitchell, 161 A.3d at 975
    (“The
    fact that one of the risks and complications of the laparoscopic hysterectomy, i.e., the
    9 While the Brady Court offered that a list of such risks “as they appear on an informed-
    consent sheet” may be relevant with respect to the standard of care, we interpret this to
    mean the generic offering of such risks, and not the informed-consent sheet itself. 
    Id. at 1161.
    Indeed, to offer into evidence the informed-consent sheet itself would undermine
    the clear distinction made in Brady between informed consent evidence and risks and
    complications evidence, and such a proffer, absent special justification, would
    unnecessarily risk the very dangers regarding a jury receiving irrelevant informed consent
    evidence warned of in Brady.
    [J-77-2018] - 15
    perforation of the bowel, was the injury suffered by Mitchell does not make it more or less
    probable that Dr. Shikora conformed to the proper standard of care for a laparoscopic
    hysterectomy and was negligent.”).
    The complex nature of the practice of medicine ― requiring, in the litigation realm,
    expert testimony for virtually all aspects of a plaintiff’s burden to prove negligence, as well
    as in defense to those allegations ― is central to our admissibility inquiry. Determining
    what constitutes the standard of care is complicated, involving considerations of anatomy
    and medical procedures, and attention to a procedure’s risks and benefits. Further, a
    range of conduct may fall within the standard of care. While evidence that a specific injury
    is a known risk or complication does not definitively establish or disprove negligence, it is
    axiomatic that complications may arise even in the absence of negligence.                  We
    emphasize that “[t]he art of healing frequently calls for a balancing of risks and dangers
    to a patient. Consequently, if injury results from the course adopted, where no negligence
    or fault is present, liability should not be imposed upon the institution or agency actually
    seeking to assist the patient.” 
    Toogood, 824 A.2d at 1150
    . As a result, risks and
    complications evidence may clarify the applicable standard of care, and may be essential
    to provide, in this area, a complete picture of that standard, as well as whether such
    standard was breached. Stated another way, risks and complications evidence may
    assist the jury in determining whether the harm suffered was more or less likely to be the
    result of negligence. Therefore, it may aid the jury in determining both the standard of
    care and whether the physician’s conduct deviated from the standard of care.               We
    recognized as much in Brady. See 
    Brady, 111 A.3d at 1161-62
    (“Evidence about the
    risks of surgical procedures, in the form of either testimony or a list of such risks as they
    appear on an informed-consent sheet, may also be relevant in establishing the standard
    [J-77-2018] - 16
    of care.”). As such, we hold that evidence of the risks and complications of a procedure
    may be admissible in a medical negligence case for these purposes.10
    Indeed, medical negligence cases involve a classic confrontation among experts,
    each testifying as to the appropriate standard of care, any breach of that standard, and
    whether such breach caused injury. The weighing of this evidence is for the jury, not the
    court. Such evidence, and, indeed, any evidence, is to be liberally admitted at trial, and
    is relevant if it has “any tendency to make a fact [of consequence] more or less probable
    than it would be without the evidence.” Pa.R.E. 401. Importantly, the process commands
    not that evidence be reliable, but that reliability be assessed in a particular manner: by
    “testing in the crucible of cross-examination.” Crawford v. Washington, 
    541 U.S. 36
    , 61
    (2004). Cross-examination, according to Professor John Henry Wigmore, is “beyond any
    doubt the greatest legal engine ever invented for the discovery of truth.” 5 Wigmore,
    Evidence, § 1367; Heddings v. Steele, 
    526 A.2d 349
    , 351 (Pa. 1987). Thus, the expert
    testimony, and any additional evidence, in a medical negligence case will be vetted
    10 Case law from our sister states supports our conclusion. See McDaniel v. UT Medical
    Group, 
    2018 WL 774770
    , *2 (W.D. Tenn. February 7, 2018) (“This order does not prevent
    UTMG from presenting evidence of the surgical and post-operative risks. . . . UTMG may
    present this evidence in the form of general testimony by the defendant[] or nonparty
    expert witnesses” (citations and internal quotations omitted)); Hillyer v. Midwest
    Gastrointestinal Associates, 
    883 N.W.2d 404
    , 416 (Neb. App. 2016) (“To avoid confusion
    and inappropriate prejudice, evidence of the risks of a procedure is instead properly
    admitted in the form of general testimony by the defendants or nonparty expert witnesses.
    The defendant or nonparty expert witnesses can testify about the risks of the relevant
    surgical procedures generally (e.g., that perforations are a risk of colonoscopies), but
    cannot testify that the patient was informed of such risks prior to the procedure.”); Hayes
    v. Camel, 
    927 A.2d 880
    , 890 (Conn. 2007) (“Thus, although evidence of the risks of a
    surgical procedure is relevant in the determination of whether the standard of care was
    breached, it was unduly prejudicial to admit such evidence in the context of whether and
    how they were communicated to the plaintiff.”); Waller v. Aggarwal, 
    688 N.E.2d 274
    , 276
    (Ohio App. 1996) (in addressing contention that bladder injuries may occur during
    laparoscopic procedures in the absence of negligence, court opined that “this theory could
    easily be demonstrated without confusion through the testimony of an expert, rather than
    through the introduction of the consent form.”).
    [J-77-2018] - 17
    through direct and cross-examination. Ultimately, it is for the jury to determine whether a
    patient’s injury is the result of negligence. We find that, without the admission of testimony
    of known risks or complications, where appropriate, a jury may be deprived of information
    that a certain injury can occur absent negligence, and, thus, would be encouraged to infer
    that a physician is a guarantor of a particular outcome.11 12 While we recognize that this
    determination allows for the potential that a jury might mistakenly conclude that an injury
    was merely a risk or complication of a surgery, rather than as a result of negligence, we
    believe that the significant consequences of a prohibition on such evidence tip the scales
    in favor of admissibility; moreover, we are confident that trial judges will serve their
    evidentiary gate-keeping function in this regard and, through instruction and comment,
    ensure that juries understand the proper role of such evidence at trial.
    The dissent takes a contrary view, first accusing the majority herein of enacting a
    per se rule that risks and complications evidence is always admissible in medical
    11 The Superior Court’s alternative view ― focusing solely on the injury, and deeming
    irrelevant to the negligence inquiry any consideration of whether the injury could have
    occurred in the absence of negligence, see 
    Mitchell, 161 A.3d at 973
    (“The evidence
    would tend to mislead and/or confuse the jury by leading it to believe that Mitchell’s
    injuries were simply the result of the risks and complications of the surgery.”) ― is
    inconsistent with the principle that certain injuries happen even in the absence of
    negligent conduct. While the occurrence of a known complication does not preclude a
    finding of negligence, conversely, negligence may not be inferred merely from the
    occurrence of a complication when such complication is known to occur without
    negligence.
    12 We reject Mitchell’s contention that defense expert testimony relying on studies
    regarding known risks and complications should be inadmissible because such studies
    may not distinguish between injury due to known risks and those caused by negligence.
    Any such challenges go to the weight, not the admissibility, of the evidence. It is for the
    jury to accept or reject a defendant’s testimony as credible, and the jury may believe all,
    part, or none of the testimony of any witness. In the Interest of: J.B., 
    189 A.3d 390
    , 408
    (Pa. 2018). If an expert’s testimony is based upon a flawed study, it will be subjected to
    cross-examination, impeached, and dismissed by a jury. Additionally, such testimony
    may be challenged under Frye v. United States, 
    293 F.2d 1013
    (D.C. Cir. 1923) where
    there is reason to believe that “an expert witness has not applied accepted scientific
    methodology in a conventional fashion in reaching his or her conclusions.” Betz v.
    Pneumo Abex, LLC, 
    44 A.3d 27
    , 53 (Pa. 2012).
    [J-77-2018] - 18
    malpractice cases. See Dissenting Opinion (Donohue, J.). Respectfully, this is not our
    determination. As noted above, such evidence may be admissible, subject to traditional
    concerns of relevancy, reliability, and disqualifying considerations such as undue
    prejudice.
    The dissent further claims that evidence of risks and complications is irrelevant in
    this case, as it does not speak to whether Dr. Shikora acted within the applicable standard
    of care. Respectfully, the dissent takes too circumscribed a view of such evidence and
    how it relates to the standard of care or breach thereof. First, the critical inquiry in a
    medical malpractice action is whether the physician’s treatment fell below the appropriate
    standard of care ― i.e., was there an unwarranted departure from generally accepted
    standards of medical practice resulting in injury to the patient. 
    Brady, 111 A.3d at 1161
    .
    In attempting to resolve these questions, evidence is freely admitted because, as we
    discussed, evidence is relevant if it has “any tendency to make a fact [of consequence]
    more or less probable than it would be without the evidence.” Pa.R.E. 401. Again, our
    decision in Brady fully supports our approach as we stressed the low threshold for
    relevance when discussing the admission of the risks of surgical procedures. 
    Brady, 631 A.3d at 1162
    . Here, evidence of the risks and complications of the initial incision in
    laparoscopic surgery, as conveyed by Appellants’ expert, is broader than suggested by
    the dissent. As set forth in greater length below, and distilled to its essence, Appellants’
    expert offered that: this type of incision is undertaken blind; as a result, it involves a
    known increased risk of cutting of the bowel; such injury can occur in the absence of
    negligence; and Appellants did all they could do to avoid the injury and acted within the
    applicable standard of care. Thus, as such risks and complications of this incision are
    well-recognized, and can occur in the absence of negligence, it would be less probable
    that the standard of care was breached in making such a first blind cut. This evidence
    [J-77-2018] - 19
    provides a fuller picture of the proper standard, and whether a physician’s conduct fell
    below that standard. While a plaintiff could refute such evidence and standard, ultimately,
    it would be for a jury, considering all relevant facts, to determine the standard of care and
    resolve whether such standard was breached.
    In support of its position, the dissent makes much of the expert testimony from
    Appellants’ expert, Dr. Ascher-Walsh, and specifically that he “admitted that the fact that
    Mitchell suffered a colon injury, which is a known risk of a laparoscopic hysterectomy,
    provides no insight into whether the surgeons who performed the procedure were
    negligent and breached the standard of care - the injury could happen as a result of
    negligence or not,” Dissenting Opinion (Donohue, J.) at 6-7, and that Dr. Ascher-Walsh
    agreed that the known risks of the surgery did not clarify the applicable standard of care,
    
    id. at 9.
    Making the point again, the dissent further presses that “Dr. Asher-Walsh testified
    that evidence of known risks in the case at bar was irrelevant to the standard of care.” 
    Id. Yet, despite
    the dissent’s repeated urgings, it fails to appreciate the exact question
    proffered to Dr. Asher-Walsh, his entire testimony, and the point that risks and
    complications evidence involves more than the injury itself.           In this exchange with
    Mitchell’s counsel, rather than speaking to specific conduct, or whether an injury could
    occur in the absence of negligence, Dr. Asher-Walsh was asked only about the injury
    itself:
    Q. [Mitchell’s Counsel] So, in fact, the injury, the bowel injury
    itself, doesn’t really tell us much about the standard of care,
    does it?
    A. [Dr. Asher-Walsh] That’s correct.
    N.T., 2/5/16, at 707.
    Based upon the specific question asked of him, Dr. Ascher-Walsh merely stated
    the obvious: that the exact injury suffered ― the cutting of Mitchell’s bowel ― may have
    [J-77-2018] - 20
    resulted from negligence, or not from negligence. This passage was not, as implied by
    the dissent, a “gotcha” moment on the stand. Rather, risks and complications evidence
    goes beyond the specific injury at issue and includes the conduct of the physician and
    circumstances surrounding that conduct, as exemplified by Dr. Ascher-Walsh’s
    testimony:
    Q. [Appellants’ Counsel] Would you just take it, if you will, from
    there. Explain to the jury, I'll interrupt you if I need to, why you
    hold that opinion to a reasonable degree of medical certainty?
    A. I think that really the only place in this case where one can
    find fault is in the initial incision into the abdomen, and during
    that incision is the one time during the surgery -- I think you
    have seen pictures of how narrow a site you are going down
    -- it is the one time in the surgery when you are making an
    incision into a space where you can't really see where you are
    going.
    You know, you are cutting through tissue that
    occasionally you can see through it, but very often you can't
    see through it at all. Everybody is very different. Most of the
    time, especially going through a little incision, the more fat, the
    deeper the longer that incision is. That initial incision, I've
    done over 8,000 case[s] and every time I make that incision, I
    hold my breath[] because you never know 100 percent that
    that is going to be okay. I feel much better once you are inside
    and seeing, but that initial incision is when you can't be sure.
    The benefit of doing it that way is that the patient will
    recover faster, have less pain, sort of both the surgeons and
    patients are happy to take that risk because it is going to
    benefit them in the long run; but there is going to be those
    times where that incision is going to cause a problem like in
    this case.
    N.T., 2/5/16, at 694-95.
    Indeed, Dr. Ascher-Walsh did not simply testify that a specific injury is a risk of
    laparoscopic surgery, but provided a full explanation regarding whether such injury may
    occur in the absence of negligence and why:
    [J-77-2018] - 21
    A. [Dr. Ascher-Walsh] Half the time that doesn't work, half the
    time you just have to make sure you are pulling up the thinnest
    amount of tissue you possibly can after you make that cut and
    you are hoping that there isn't anything on the other side.
    Q. [Appellants Counsel] Again, that's why the entry in the
    laparoscopic procedures, sometimes in the terminology they
    use is it is blind if you will?
    A. Correct.
    Q. It is not really that it is blind, it is just at that one stage the
    surgeon doesn't know exactly what is behind the peritoneum.
    Is that a fair statement?
    A. That's exactly correct.
    Q. And furthermore, if a structure were to be behind where it
    is not -- in a position where it's not supposed to be, is that
    when complications can occur unfortunately?
    A. Absolutely. Absolutely. I mean there's always something
    behind the peritoneum there. There's not like there is free
    space. There's not gas in your abdomen naturally. There's
    always bowel, there's always something right on the other
    side of that, whether it is large intestine or small intestine. It is
    always an incision where there can be injury.
    Q. In the best of possible care?
    A. Correct.
    N.T., 2/5/16, at 700-01. Dr. Ascher-Walsh continued in this vein tying the physician’s
    conduct to the standard of care, to the fact that an injury may occur in the absence of
    negligence.
    Q. [Appellants’ Counsel] In your review, Dr. Ascher-Walsh, did
    you see anything by way of Dr. Shikora and Dr. Hansen's
    approach that suggests to you that they did not proceed in this
    case, that is proceed down through those layers, proceed to
    the peritoneum, proceed with the entry that was at all below
    the standard of care?
    A. No.
    N.T., 2/5/16, at 702. He later added:
    A. It is a complication in this case.
    Q. [Mitchell’s Counsel] I see. And, doctor, as far as the
    literature is concerned -- well, strike that. I think you had
    [J-77-2018] - 22
    indicated in your report that the injury that Miss Mitchell
    sustained was unavoidable. That's what you said?
    A. Correct.
    Q. If it was unavoidable it would happen every time, wouldn't
    it?
    A. No.
    Q. Well, I don't understand if it is unavoidable, wouldn't it
    happen every time?
    A. Not necessarily. It is unavoidable in the sense that he did
    everything he could to avoid it, yet it still happened, so,
    therefore, it was unavoidable.
    N.T., 2/5/16, at 721.
    Indeed, Dr. Ascher-Walsh was entirely consistent in his ultimate conclusion, based
    upon the above, as to whether the standard of care was breached:
    Q. [Appellants’ Counsel] Now, with respect to those opinions,
    Dr. Ascher-Walsh, do you have an opinion as to whether on
    May 16th of 2012, Dr. Shikora, along with his assistant, Dr.
    Hansen met the standard of care?
    A. I do.
    Q. And what is your opinion in that regard?
    A. I feel like they absolutely met the standard of care.
    N.T. 2/5/16, at 694.
    In our view, the above expert testimony, taken in toto, concerning risks and
    complications was both relevant and admissible regarding the proper standard of care
    and whether there was a breach thereof. Related thereto, the difficulty with the dissent’s
    approach is that it would prevent a jury from obtaining a complete understanding of the
    applicable standard of care and the possible breach of that standard. Ultimately, the
    dissent’s approach undermines the foundational tenet that injuries may occur in the
    absence of negligence and would work a radical change in medical malpractice
    jurisprudence, making physicians virtual guarantors of a result or warrantors of a cure ―
    neither of which, as a matter of fact or law, is supportable.
    [J-77-2018] - 23
    Indeed, the dissent’s position ― that risks and complications evidence is
    inadmissible because it does not speak to the proper standard of care in this case, with
    respect to this physician ― proves too much. The dissent, after concluding such evidence
    was inadmissible in this matter, concedes that, in certain circumstances, such evidence
    is relevant, such as cases involving “new, experimental or developing surgeries, as such
    evidence would ‘establish the standard of care’ where one otherwise does not exist.”
    Dissenting Opinion (Donohue, J.) at 3 n.3. Yet, applying the dissent’s logic, even in this
    scenario, the risks and complications of a procedure would not make it more or less
    probable that the particular physician conformed to the proper standard of care in that
    case. The dissent does not explain how this approach regarding the admissibility of risks
    and complications evidence would be inadmissible in this matter, but potentially
    admissible in other instances. The inescapable conclusion is that faithful application of
    the dissent’s approach and logic would render such evidence inadmissible in all cases.
    Here, Mitchell’s expert testified that the proper standard of care for performing a
    laparoscopic hysterectomy included identification of the underlying body structures before
    making an incision by looking into the abdomen, and contended that cutting into the colon
    underneath the peritoneum without proper identification of the anatomy below the incision
    site violated the relevant standard of care. N.T., 2/1/16, at 183-85, 202-04, 245-46.
    Appellants’ expert testified that complications are often unavoidable; that the initial
    incision was the most dangerous part of the procedure; that, half the time, the abdominal
    tissue is too thick to see through; that when a patient’s bowel is in an unanticipated
    location an injury may occur while making the initial incision even with the best possible
    care; and, ultimately, that the manner in which Dr. Shikora and Dr. Hansen proceeded
    did not fall below the standard of care. N.T., 2/5/16, at 694, 697, 700-02. After the
    [J-77-2018] - 24
    introduction of this contrasting expert testimony, the jury found Appellants’ defense more
    credible and, thus, entered judgment in their favor.
    Accordingly, we find that the trial court herein properly distinguished between
    informed-consent evidence, which it did not admit, and surgical risks and complications
    evidence, which it admitted.    In finding this risks and complications evidence to be
    inadmissible, the Superior Court erred. Therefore, we reverse the Superior Court’s order,
    and reinstate the judgment on the verdict entered in favor of Appellants.
    Chief Justice Saylor and Justices Baer and Mundy join the opinion.
    Justice Wecht files a concurring opinion.
    Justice Donohue files a concurring and dissenting opinion in which Justice
    Dougherty joins.
    [J-77-2018] - 25