Jo Huskey v. Ethicon, Inc. , 848 F.3d 151 ( 2017 )


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  •                               PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 15-2118
    JO HUSKEY; ALLEN HUSKEY,
    Plaintiffs - Appellees,
    v.
    ETHICON, INC.; JOHNSON & JOHNSON,
    Defendants - Appellants.
    Appeal from the United States District Court for the Southern
    District of West Virginia, at Charleston.    Joseph R. Goodwin,
    District Judge. (2:12-cv-05201; 2:12-md-02327)
    Argued:   December 8, 2016                 Decided:   January 26, 2017
    Before MOTZ and DIAZ, Circuit Judges, and DAVIS, Senior Circuit
    Judge.
    Affirmed by published opinion. Judge Motz wrote the opinion, in
    which Judge Diaz and Senior Judge Davis joined.
    ARGUED: David B. Thomas, THOMAS COMBS & SPANN, PLLC, Charleston,
    West Virginia, for Appellants.   Edward Anthony Wallace, WEXLER
    WALLACE LLP, Chicago, Illinois; Fidelma Louise Fitzpatrick,
    MOTLEY RICE LLC, Providence, Rhode Island, for Appellees.     ON
    BRIEF: Charles C. Lifland, Los Angeles, California, Stephen D.
    Brody, David K. Roberts, O’MELVENY & MYERS LLP, Washington,
    D.C.; Philip J. Combs, THOMAS COMBS & SPANN, PLLC, Charleston,
    West Virginia; Christy D. Jones, BUTLER SNOW LLP, Ridgeland,
    Mississippi, for Appellants.    Mark R. Miller, WEXLER WALLACE
    LLP, Chicago, Illinois; Jeffrey Kuntz, Adam Davis, WAGSTAFF &
    CARTMELL LLP, Kansas City, Missouri, for Appellees.
    2
    DIANA GRIBBON MOTZ, Circuit Judge:
    After    Jo      Huskey     experienced          complications        from    the
    implantation of a transvaginal mesh medical device, she and her
    husband     Allen     Huskey    filed     this       products      liability     action
    against     Ethicon,     Inc.    and     Johnson       &    Johnson    (collectively
    “Ethicon”).         Following a nine-day trial, the jury returned a
    general verdict for the Huskeys on their design defect, failure
    to warn, and loss of consortium claims.                    Ethicon now appeals the
    denial of its post-trial renewed motion for judgment as a matter
    of law or, in the alternative, for a new trial.                            The Huskeys
    offered sufficient evidence to sustain the jury’s verdict and
    the district court committed no reversible error.                       Accordingly,
    we affirm.
    I.
    A.
    In    2008,    Mrs. Huskey    began      suffering      symptoms      of   Stress
    Urinary     Incontinence       (“SUI”).         In    January      2011,    after   her
    condition had worsened, she discussed treatment options with her
    doctor,     Dr. Gretchen       Byrkit.     By    this      time,    Mrs. Huskey     was
    regularly leaking urine while coughing, laughing, and sneezing,
    and   she     also     experienced       pain        during     intercourse.         At
    Dr. Byrkit’s suggestion, Mrs. Huskey agreed to have Dr. Byrkit
    3
    surgically         implant      a    medical         device    called     the        Tension-Free
    Vaginal Tape-Obturator (“TVT-O”).
    The TVT-O is a mid-urethral sling that uses a heavy-weight
    laser-cut mesh.            Ethicon received clearance from the Food and
    Drug    Administration           (“FDA”)        to    market     the    TVT-O        in     December
    2003.        Ethicon uses polypropylene for the TVT-O’s mesh.                                    The
    TVT-O        was   not    the        first       mid-urethral          sling     Ethicon         had
    manufactured; rather, it was a second-generation version of an
    earlier Ethicon device called the Gynecare TVT and is one of
    multiple slings that Ethicon has manufactured and sold.
    On     February     23,      2011,       Dr. Byrkit      performed        Mrs. Huskey’s
    implantation surgery.                  A few weeks later, Mrs. Huskey visited
    Dr. Byrkit’s        office       for      a    post-operative        check-up.              At   this
    visit, Dr. Byrkit examined Mrs. Huskey and found that some mesh
    on     her    right      side       had       eroded.         This     eroded        mesh    caused
    Mrs. Huskey to experience pelvic pain.
    On June 24, 2011, after various alternative treatments that
    Dr. Byrkit had recommended failed, Mrs. Huskey agreed to have a
    second surgical operation to cover the exposed mesh.                                   Dr. Byrkit
    performed this operation on June 29, 2011.                             Unfortunately, this
    operation was not successful and did not relieve Mrs. Huskey’s
    pain.         Dr. Byrkit         then         referred    Mrs. Huskey           to     Dr. Sohail
    Siddique, a urogynecologist, for further treatment.
    4
    On     November      18,   2011,   Dr. Siddique             performed    surgery    to
    excise Mrs. Huskey’s mesh.                He found that she had an infection
    and that the mesh on Mrs. Huskey’s right side had completely
    eroded.        He could not remove all the mesh because some had
    retracted behind Mrs. Huskey’s pubic bone.
    To this day, the remaining mesh and scar tissue from her
    operations          cause    Mrs. Huskey           to        experience      severe     pain,
    particularly         when    engaging     in       physical        activity    and    sexual
    intercourse.         Additionally, her SUI symptoms have returned.                        For
    the    rest    of    her    life,   she   will      require         medication    for   pain
    management; no surgical intervention can permanently cure her.
    B.
    On September 6, 2012, the Huskeys filed the operative Short
    Form Complaint in the Southern District of West Virginia in the
    instant       multidistrict       litigation,           In    Re   Ethicon    Inc.,   Pelvic
    Repair Sys. Prods. Liab. Litig., MDL No. 2327.                                The Huskeys,
    Illinois residents, brought all of their claims under Illinois
    law.    After the district court granted Ethicon partial summary
    judgment, five claims remained for trial:                          strict liability and
    negligent design defect; strict liability and negligent failure
    to warn; and Mr. Huskey’s loss of consortium.                                Beyond actual
    damages, Mrs. Huskey sought punitive damages for the substantive
    claims.
    5
    Trial began on August 22, 2014 and lasted nine days.                                   The
    Huskeys presented their case, which consisted of testimony from
    thirteen witnesses and the introduction of numerous documents,
    over the first six trial days.                 At the conclusion of their case,
    Ethicon    orally         moved   for   judgment      as     a    matter    of    law   under
    Federal Rule of Civil Procedure 50(a).                           The court granted the
    motion     as    to   Mrs. Huskey’s           claim    for       punitive    damages        but
    otherwise deferred ruling on the motion.                           Ethicon renewed its
    motion at the close of its case, and the court, again deferring
    a ruling, submitted the case to the jury.
    The       jury   returned      a   unanimous       general       verdict         for   the
    Huskeys on all five claims.               The jury awarded Mrs. Huskey $3.07
    million in total damages, allocated between past expenses for
    medical care, previous pain and suffering, and future pain and
    suffering.       The jury awarded Mr. Huskey an additional $200,000
    for his loss of consortium.
    After the jury returned its verdict, Ethicon again renewed
    its motion for judgment as a matter of law.                        In the alternative,
    Ethicon sought a new trial pursuant to Rule 59(a)(1)(A).                                    The
    court    issued       a    thorough     written       order       denying    the      motion.
    Huskey    v.    Ethicon,      Inc.,     No.    2:12-cv-05201,         
    2015 WL 4944339
    (S.D. W. Va. Aug. 19, 2015).                   Ethicon subsequently noted this
    timely appeal.
    6
    II.
    A.
    Ethicon initially contends that the district court erred in
    denying it judgment as a matter of law.                    We review de novo the
    denial of Ethicon’s motion.           Durham v. Jones, 
    737 F.3d 291
    , 298
    (4th Cir. 2013).       A court “may grant judgment as a matter of law
    only if, viewing the evidence in a light most favorable to the
    non-moving party and drawing every legitimate inference in that
    party’s favor, . . . the only conclusion a reasonable jury could
    have reached is one in favor of the moving party.”                       Saunders v.
    Branch Banking & Tr. Co. of Va., 
    526 F.3d 142
    , 147 (4th Cir.
    2008).      If, upon the conclusion of a party’s case, “a reasonable
    jury would not have a legally sufficient evidentiary basis to
    find for the party on that issue,” a court may grant a motion
    from the opposing party for judgment as a matter of law.                           Fed.
    R.   Civ.    P.   50(a).    When    the    court      defers    ruling   on   such    a
    motion, Rule 50(b) allows a party to renew it after the jury
    returns a verdict.
    Ethicon moved for judgment as a matter of law on all five
    of the Huskeys’ claims.            As Ethicon’s counsel conceded at oral
    argument,     since   the   jury    returned      a   general    verdict,     we    can
    reverse     the   court’s   denial    of       Ethicon’s    motion   only     if   the
    Huskeys failed, as a matter of law, to prove both their design
    defect and failure to warn claims.                Given our resolution of the
    7
    Huskeys’ design defect claims, we need not discuss their failure
    to warn claims.      Moreover, because their negligent design defect
    claim relies on the same facts and arguments as their strict
    liability design defect claim, we address those claims together.
    Similarly,     because     it    is    wholly      derivative   of   Mrs.   Huskey’s
    claims,   we   do   not    separately        consider    Mr.    Huskey’s    loss    of
    consortium claim.         See Blagg v. Ill. F.W.D. Truck & Equip. Co.,
    
    572 N.E.2d 920
    , 926 (Ill. 1991).
    B.
    To prevail on their design defect claims, the Huskeys had
    to   demonstrate:         1)    that    a   certain    condition     of   the    TVT-O
    resulted from Ethicon’s design, 2) that this condition made the
    product unreasonably dangerous, 3) that the dangerous condition
    existed when Mrs. Huskey’s TVT-O left Ethicon’s control, and 4)
    that the dangerous condition in the TVT-O proximately caused
    harm to Mrs. Huskey.             See Mikolajczyk v. Ford Motor Co., 
    901 N.E.2d 329
    , 345 (Ill. 2008).                 Ethicon makes two arguments in
    support of its contention that the court erred in denying it
    judgment as a matter of law:                    1) that the Huskeys failed to
    prove a specific flaw in the TVT-O’s design -- as opposed to a
    general   complication          flowing     from    implantation,     and   2)   that
    comment k of the Restatement (Second) of Torts § 402A shields it
    from liability.     We address these arguments in turn.
    8
    1.
    The    record      belies     Ethicon’s     assertion        that       the   Huskeys
    failed to prove that a specific defect of the TVT-O’s design
    caused harm         to    Mrs. Huskey.        As   the    district        court      properly
    held, the Huskeys offered sufficient evidence for a reasonable
    jury to find that Ethicon’s use of heavyweight polypropylene
    mesh in the TVT-O caused Mrs. Huskey’s injuries.
    First,       Dr. Scott       Guelcher,      an    associate            professor     of
    chemical engineering at Vanderbilt University and one of the
    Huskeys’ expert witnesses, testified about the body’s reaction
    to polypropylene and the consequences that ensue.                              He explained
    that “the body recognizes [the polypropylene mesh] as a foreign
    material, and . . . will continue to attack it in this way until
    it’s    removed      or    destroyed     or    it’s     gone.”          And    Dr. Guelcher
    testified, based on his research, that “it’s best to minimize
    the amount of polypropylene that’s present in the mesh,” because
    “the    more    polypropylene         surface      that’s    present,          the    greater
    those changes would be, [and] the more hazardous they could be.”
    Next, Dr. Bruce Rosenzweig, a urogynecologist and another
    of     the    Huskeys’      expert     witnesses,        bolstered        Dr. Guelcher’s
    testimony.           Dr. Rosenzweig         testified       that        Ethicon      used   a
    heavyweight mesh and “[t]he more mesh there is in the pelvis,
    the    more    of    a    foreign    body     response.”           He    explained        that
    heavyweight mesh can lead to a foreign body response in an area
    9
    near the inner thigh called the obturator space, and that these
    foreign bodies can “irritate the nerve [that passes nearby] and
    lead to pain.”
    Additionally,       Dr. Brigitte         Hellhammer,         a    former      Ethicon
    employee,   testified      that     she    had    no    reason         to   believe    that
    lightweight      mesh       could         not     effectively               treat      SUI.
    Dr. Hellhammer      explained     that      one    risk      of        implanting      mesh
    devices in patients was that the mesh would shrink, and that the
    weight of the mesh helps determine the likelihood of shrinkage.
    Dr. Hellhammer testified to a generally-recognized understanding
    that lightweight mesh “would help in reducing a foreign body
    response,     inflammatory        response,            and    would         reduce      the
    potentiation for scar plating.”
    Finally, Dr. Jerry Blaivas, a urologist and another expert
    witness for the Huskeys who had conducted a pelvic examination
    of Mrs. Huskey, testified that Mrs. Huskey had severe scarring
    and suffered from “chronic pelvic pain.”                     Dr. Blaivas believed
    Mrs. Huskey’s symptoms were “a reaction to the mesh” and that he
    did   not   “know    of    anything       else    that       can       cause . . . this
    particular constellation of symptoms.”
    Drawing all inferences in the Huskeys’ favor, a reasonable
    jury could conclude from this expert testimony that Ethicon’s
    use of a heavyweight quantity of polypropylene mesh in the TVT-O
    10
    constituted        a     design     defect        that      caused       Mrs. Huskey’s
    inflammation and pelvic pain.
    2.
    Ethicon next argues that an exception to strict liability
    found in comment k to § 402A of the Restatement (Second) of
    Torts, on which Illinois courts rely, nevertheless shields it
    from liability.          See Kirk v. Michael Reese Hosp. & Med. Ctr.,
    
    513 N.E.2d 387
    ,    392     (Ill.    1987)        (citing   comment       k    in     a
    recitation of applicable law).
    Comment     k,     which     is     captioned       “[u]navoidably            unsafe
    products,” recognizes that “some products . . . , in the present
    state of human knowledge, are quite incapable of being made safe
    for their intended and ordinary use.”                     Restatement (Second) of
    Torts § 402A cmt. k (Am. Law Inst. 1965).                      Comment k recommends
    that    such     products,      “with     the   qualification          that    they       are
    properly prepared and marketed, and proper warning is given,”
    not    trigger    strict     liability.           
    Id. This is
        because       “the
    marketing and the use of [unavoidably unsafe products] are fully
    justified, notwithstanding the unavoidable high degree of risk
    which    they    involve.”        
    Id. Such products,
         it    explains,         are
    neither “defective, nor . . . unreasonably dangerous.”                         
    Id. Although comment
    k notes that unavoidably unsafe products
    “are    especially       common    in     the   field     of   drugs,”        
    id., under Illinois
    law, courts determine “on a case by case basis” if a
    11
    particular product falls within comment k, Glassman v. Wyeth
    Labs., Inc., 
    606 N.E.2d 338
    , 342 (Ill. App. Ct. 1992).                     Whether
    a product is unavoidably unsafe is a question of fact on which
    the defendant bears the burden of proof.                   
    Id. at 343.
            If a
    reasonable jury could find that the TVT-O did not meet comment
    k’s parameters, Ethicon’s reliance on comment k fails.
    Much   of   the    trial    evidence      indicating   that    the    use   of
    heavyweight polypropylene mesh constituted a design defect also
    suggests    that       comment     k    provides     Ethicon       no     defense.
    Specifically,      the      jury       could      reasonably       infer       from
    Dr. Guelcher’s     testimony     that    the     greater    quantity      of   mesh
    Ethicon used in the TVT-O, the greater the chance that a patient
    would experience an adverse foreign body response.                        The jury
    could also reasonably infer from Dr. Hellhammer’s testimony that
    had Ethicon used lightweight mesh, the TVT-O would have remained
    effective and patients would have a reduced risk of an adverse
    foreign body response.           Taken together, the expert testimony
    allowed the jury to infer that Ethicon could have designed the
    TVT-O with lightweight mesh without sacrificing any performance.
    Consequently, the jury could reasonably conclude that the TVT-O
    was not unavoidably unsafe.            Comment k does not shield Ethicon
    from liability.
    12
    III.
    We    next   address    Ethicon’s       contention   that     the    district
    court should have granted it a new trial.                 Federal Rule of Civil
    Procedure 59(a)(1)(A) allows a court to grant a party’s motion
    for a new trial if the verdict is contrary to the clear weight
    of the evidence, rests upon false evidence, or will cause a
    miscarriage of justice.              Minter v. Wells Fargo Bank, N.A., 
    762 F.3d 339
    , 346 (4th Cir. 2014).
    We review a denial of a new trial for abuse of discretion.
    United States ex rel. Drakeford v. Tuomey, 
    792 F.3d 364
    , 375
    (4th Cir. 2015).          A court abuses its discretion if it relies on
    incorrect      legal     conclusions    or     clearly   erroneous     findings    of
    fact.       Belk, Inc. v. Meyer Corp., U.S., 
    679 F.3d 146
    , 161 (4th
    Cir. 2012).         Moreover, we can reverse even without such errors
    “if we have ‘a definite and firm conviction that the court below
    committed a clear error of judgment in the conclusion it reached
    upon    a     weighing    of   the    relevant     factors.’”        
    Id. (quoting Westberry
    v. Gislaved Gummi AB, 
    178 F.3d 257
    , 261 (4th Cir.
    1999)).
    Ethicon raises two grounds for a new trial.                         First, it
    contends that the district court improperly refused to instruct
    the    jury    on   comment    k.       Next,    it   asserts   that       the   court
    improperly excluded multiple pieces of evidence involving the
    FDA.
    13
    A.
    We turn first to the comment k instruction.                     Ethicon argued
    at   trial    that      comment    k   entitled      it   to    “at   a     minimum,   an
    appropriate jury instruction.”                   After considering briefing and
    oral argument on the question, the district court declined to
    include the requested comment k instruction. 1                   Instead, the court
    instructed the jury that it could find Ethicon liable on the
    design    defect     claim     only    if    it     found      that   the    TVT-O     was
    unreasonably dangerous.            The court then defined an “unreasonably
    dangerous” product as one in which the “risk of danger inherent
    in the design outweighs the benefits of the design when the
    product      is   put     to   a   use      that    is    reasonably        foreseeable
    considering the nature and function of the product.”
    1Ethicon titled the instruction it                        requested     “Inherent
    Risks,” and the proposed instruction read:
    Some useful products are inherently dangerous and
    cannot be made safe for their intended and ordinary
    use.     An example is a prescription drug.          A
    prescription drug is not defective simply because it
    . . . has unavoidable side effects.
    Products that contain inherent dangers are not
    defectively designed or unreasonably dangerous so long
    as they are accompanied by proper directions and
    warning.
    If you find that the risks that allegedly injured
    Mrs. Huskey . . . were unavoidable, inherent risks of
    the product, and that the product was accompanied by
    proper directions and warnings, you should find that
    the product is not defective.
    14
    We review the district court’s refusal to provide Ethicon’s
    proposed instruction for abuse of discretion.                       Rowland v. Am.
    Gen. Fin., Inc., 
    340 F.3d 187
    , 191 (4th Cir. 2003).                        We evaluate
    the jury charge as a whole, and an instructional error warrants
    a   new   trial     only    if   it   fails       to   inform    the     jury   of   the
    controlling legal principles.                
    Id. Any lack
    of clarity must
    prejudice the challenging party.                 
    Id. Again, to
       show    that     a    product     falls    within    comment    k’s
    protection, the defendant must prove that a product’s “marketing
    and . . . use . . . are          fully       justified,        notwithstanding       the
    unavoidable       high     degree     of     risk      which    [it]      involve[s].”
    Restatement (Second) of Torts § 402A cmt. k.                        We can discern
    only one difference between comment k and the jury instruction
    the court gave. 2        That difference is the burden of proof, which
    of course shifts to the defendant for comment k.                         Even assuming
    that Ethicon had produced sufficient evidence to justify the
    issuance of a comment k instruction, we cannot hold that it
    suffered prejudice from the absence of that instruction.                        As the
    district court correctly observed, the failure to provide an
    instruction that shifts the burden to Ethicon would not likely
    2 Ethicon   argues  that  the   district  court’s actual
    instruction did not capture “the policy rationale underlying
    comment k,” namely, that of encouraging medical innovations.
    This argument fails however, given that defendants must prove
    comment k’s applicability “on a case by case basis.” 
    Glassman, 606 N.E.2d at 342
    .
    15
    have provided Ethicon with a more favorable outcome.                          Without
    any prejudice, the district court did not abuse its discretion
    in denying Ethicon a new trial on that basis.
    B.
    We next address Ethicon’s evidentiary contentions.                     Ethicon
    posits that the district court’s exclusion of four pieces of FDA
    evidence warrants a new trial.                  Those four pieces of evidence
    are:     evidence of the TVT-O’s compliance with the FDA’s Section
    510(k) evaluation process; evidence that a 2011 FDA Advisory
    Committee      deemed    mesh    slings,    including      the    TVT-O,     safe    and
    effective;      a      2013   published     guidance,      which        reported    the
    Advisory Committee’s conclusions; and the regulatory history of
    the Prolene suture, an Ethicon product that contains the same
    polypropylene as the TVT-O’s mesh.
    The    court     relied    on    Federal    Rule    of     Evidence    403    in
    excluding this evidence.               That Rule allows a court to exclude
    relevant      evidence    when    its    “probative    value      is    substantially
    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.”      Fed. R. Evid. 403.          We review a decision to exclude
    evidence on this basis for abuse of discretion.                         United States
    v. Davis, 
    690 F.3d 226
    , 257 (4th Cir. 2012).                     Improper exclusion
    of evidence warrants a new trial only if it results in “a high
    16
    probability       that    the    error . . . affect[ed]            the      judgment.”
    
    Drakeford, 792 F.3d at 375
    .
    We will address each exclusion in turn.                   But before doing
    so,    we    consider     whether    Ethicon      has     waived      any   challenge
    pertaining to the latter three pieces of evidence.                       The Huskeys
    argue that Ethicon never sought to introduce these three pieces
    of    evidence,    and    that   Ethicon       thus    cannot   now    rely    on    the
    exclusion of this evidence to gain a new trial.                        To the extent
    this accurately represents the proceedings below -- a notion
    Ethicon      strongly    contests    --    the        Huskeys   have     waived     this
    argument.
    Ethicon’s memorandum in support of its post-trial motion
    contended that the exclusion of all of the evidence it invokes
    on appeal justified a new trial.                The Huskeys’ only response to
    this argument in their briefing was to incorporate by reference
    their pre-trial filing to exclude the 510(k) evidence.                        Nowhere
    did they contend that Ethicon had not sufficiently sought to
    introduce the other FDA evidence, or had otherwise waived its
    ability to assert that the exclusion of this evidence compelled
    a new trial.       The Huskeys thus waived this argument by omitting
    it    from    their     post-trial   briefing.           Cf.    United      States    v.
    Carthorne, 
    726 F.3d 503
    , 509 n.5 (4th Cir. 2013) (holding that
    the Government “waived the waiver argument” when it failed to
    argue that plain error review applied to a particular appellate
    17
    challenge).      Having   resolved     this   issue,   we    now    examine   the
    evidence in question.
    1.
    We begin with the evidence of the TVT-O’s compliance with
    the 510(k) process.       Under the Federal Food, Drug, and Cosmetic
    Act, a manufacturer seeking to market a new medical device may
    attempt to bypass the FDA’s normal premarket approval process by
    submitting a “§ 510(k) notification.”           Medtronic, Inc. v. Lohr,
    
    518 U.S. 470
    , 478 (1996).        The FDA then evaluates whether the
    new   device   is    “‘substantially    equivalent’     to    a     pre-existing
    device.”   
    Id. If the
    FDA finds substantial equivalence, the new
    device “can be marketed without further regulatory analysis.”
    
    Id. The district
    court refused to permit Ethicon to introduce
    evidence that it had cleared the 510(k) process and evidence
    explaining that process.
    We recently held in Cisson v. C.R. Bard, Inc. (In re C.R.
    Bard, Inc.), 
    810 F.3d 913
    , 919 (4th Cir. 2016), a bellwether
    case from a related MDL, that this same district judge did not
    abuse his discretion when he excluded evidence that the device
    in question had complied with the 510(k) process.                  We noted that
    the 510(k) process focuses mostly on the equivalence between the
    product in question and an older one, and only “tangentially”
    examines the safety of the product going through the process.
    
    Id. at 922
    (emphasis added).         We rejected the view that “[b]ald
    18
    assertions      by    the   FDA”    as    to    510(k)   compliance    are    highly
    probative of a product’s safety.                
    Id. at 921.
       Given its limited
    probative value and the risk of confusing the jury by, inter
    alia, causing a battle of the experts over the robustness of the
    510(k) process’s safety examinations, we held that exclusion of
    the 510(k) compliance evidence was not improper.                 
    Id. at 921-22.
    We   see        no   reason    to     distinguish     Cisson     here.       The
    information Ethicon sought to introduce would, at best, have had
    “tangential[]” relevance to the case.                    This relative lack of
    probative value, especially given a possible battle of experts
    over the 510(k) process, underscores the risks of confusion and
    wasted time that would follow the introduction of this evidence.
    Ethicon’s effort to distinguish Cisson on the ground that the
    TVT-O’s 510(k) compliance process actually did focus heavily on
    safety would only amplify the risk, as the trial would then
    likely face a substantial diversion into just how rigorous those
    safety considerations were, how forthcoming Ethicon was to the
    FDA, and how robust the 510(k) process is.                    The district court
    did not abuse its discretion in excluding this evidence.
    2.
    We next address the FDA Advisory Committee evidence.                          In
    2011, an Obstetrics and Gynecology Devices Advisory Committee
    (the “FDA Advisory Committee”) conducted an examination of the
    “risks    and    benefits      of        surgical   mesh . . . based         on   the
    19
    published       literature        and    adverse        event      data     from”    an    FDA
    database,       and   noted      that    “[a]        substantial     number    of    quality
    clinical       trials,      as    well    as     systematic        reviews,     have       been
    published       for   the    first      generation       minimally        invasive       slings
    that    provide       evidence     of     safety       and   effectiveness          of    these
    devices.”        FDA Advisory Committee, Surgical Mesh for Treatment
    of     Women     with    Pelvic         Organ        Prolapse      and     Stress    Urinary
    Incontinence:         FDA Executive Summary 1, 28 (2011).                     In 2013, the
    FDA issued a published guidance reiterating these conclusions.
    While the district court did not permit Ethicon to present
    evidence as to the FDA’s view of the underlying studies, it did
    permit Ethicon to introduce those studies themselves.                                The FDA
    did not use its own analysis of the TVT-O to reach a conclusion
    regarding the device’s safety and efficacy.                              Rather, it simply
    opined on the work others had done.                          The underlying studies
    themselves enabled Ethicon to obtain most of the probative value
    from    the     FDA   Advisory       Committee         evidence      without    risking       a
    usurpation of the jury’s essential role in determining if the
    Huskeys had adequately proven their claims.
    Additionally,        the    FDA’s        use     of   the    510(k)     process       to
    approve the TVT-O layers on another risk of introducing the FDA
    Advisory Committee evidence.                    As discussed above, the 510(k)
    process focuses on a particular device’s equivalence to an older
    device.        Thus, the FDA’s only original conclusion regarding the
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    TVT-O    did    not    address    its    safety.      This   dynamic   creates   a
    potentially confusing disjunction for the jury between what the
    FDA deems other literature has to say about the TVT-O’s safety
    and what the FDA itself found about the TVT-O’s equivalence to
    an earlier device.             This goes beyond the mere specter of too
    much jury deference to the FDA and tacks on the prospect of the
    jury     misunderstanding        the     FDA   Advisory      Committee’s     actual
    conclusions.          In these circumstances, therefore, the court did
    not abuse its discretion in excluding the FDA Advisory Committee
    evidence.
    3.
    Finally, we consider the evidence of the regulatory history
    of Prolene used in the Prolene sutures -- the same polypropylene
    used in the TVT-O’s mesh also makes up part of the Prolene
    suture.       Ethicon wanted to introduce evidence that the FDA had
    approved the Prolene suture not only in an initial application,
    but    also    in     over   thirty     subsequent    New    Drug   Applications.
    Ethicon also sought to introduce evidence that the “FDA approved
    language indicating that Prolene [in the suture] is not subject
    to degradation via tissue enzymes.”
    As     the     district   court     correctly      explained,      “evidence
    regarding       the      FDA     process       that    the      Prolene     suture
    underwent . . . says little about the safety and effectiveness
    of the final product, the TVT-O.”               Huskey, 
    2015 WL 4944339
    , at
    21
    *13    (emphasis     added).         The    jury     ultimately         had    to     make   a
    determination about the entire device that Mrs. Huskey received,
    not just a component of it.                Introducing the evidence regarding
    Prolene sutures alone could quite plausibly cause a diversion
    into how similar and integral the Prolene sutures are to the
    TVT-O end product and the role that other components of the TVT-
    O might play in triggering foreign body responses or interacting
    with the Prolene sutures to mitigate safeguards against such
    responses.     And that is to say nothing of the risk, also present
    with the FDA Advisory Committee evidence, that the jury might
    draw too strong a conclusion from the fact that the evidence of
    Prolene’s safety comes from the FDA.                  These drawbacks underscore
    that the court acted within its discretion.
    Moreover,     even    without       the     evidence        of    the    regulatory
    history of the Prolene sutures, the court permitted Ethicon to
    introduce evidence of their robust safety record.                                   On cross-
    examination,        Ethicon’s        counsel         elicited           testimony        from
    Dr. Guelcher       that    Prolene    sutures      have    an      identical         chemical
    composition    to    the    Prolene        Ethicon    uses      in      both   its     hernia
    meshes and in its TVT meshes to treat SUI.                      In that same line of
    questioning,       Dr. Guelcher      also    acknowledged            that     his    research
    had uncovered no “problem[s] with polypropylene mesh.”                                Ethicon
    was thus able to extract the same information that would have
    made    up   the    core    probative       value     of     the      Prolene        suture’s
    22
    regulatory history without bringing in the potential negative
    effects of introducing that evidence.   The court did not abuse
    its discretion in excluding evidence of that other product’s
    regulatory history.
    IV.
    Accordingly, for the reasons set forth above, the judgment
    of the district court is
    AFFIRMED.
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