Murphy v. United States , 383 F. App'x 326 ( 2010 )


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  •                             UNPUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 08-1918
    SHERITA MURPHY; JONATHAN MURPHY, JR., Individually; J.M.,
    an Infant, by and through Sherita Murphy and Jonathan
    Murphy, Jr., his Parents and Next Friends,
    Plaintiffs - Appellants,
    v.
    UNITED STATES OF AMERICA,
    Defendant - Appellee.
    Appeal from the United States District Court for the Eastern
    District of Virginia, at Norfolk.     Robert G. Doumar, Senior
    District Judge. (2:07-cv-00120-RGD-FBS)
    Argued:   March 23, 2010                   Decided:   June 17, 2010
    Before GREGORY and AGEE, Circuit Judges, and Eugene E. SILER,
    Jr., Senior Circuit Judge of the United States Court of Appeals
    for the Sixth Circuit, sitting by designation.
    Affirmed by unpublished per curiam opinion.
    ARGUED: Laurie Michelle Higginbotham, ARCHULETA, ALSAFFAR &
    HIGGINBOTHAM, Austin, Texas, for Appellants.    Anita Kay Henry,
    OFFICE OF THE UNITED STATES ATTORNEY, Norfolk, Virginia, for
    Appellee.    ON BRIEF: Michael Archuleta, ARCHULETA, ALSAFFAR &
    HIGGINBOTHAM, Austin, Texas, for Appellants.     Dana J. Boente,
    Acting   United  States  Attorney,  Alexandria,    Virginia, for
    Appellee.
    Unpublished opinions are not binding precedent in this circuit.
    2
    PER CURIAM:
    This      case       arises   from    a       defense    verdict     awarded     in   a
    medical    malpractice        case     filed       pursuant    to   the    Federal    Tort
    Claims Act against the United States on the basis of treatment
    received      at    the    Naval   Medical         Center    (“NMC”)     in   Portsmouth,
    Virginia. 1        The district court entered judgment in favor of NMC
    because it found the Murphys failed to prove causation.                          For the
    reasons set forth below we affirm the judgment of the district
    court.
    I.
    On December 3, 2003, plaintiff Sherita Murphy went to NMC
    reporting fever, cramping, vaginal bleeding and other serious
    symptoms.      A cursory examination of Murphy, who was twenty-six
    weeks pregnant, revealed an above normal heart rate and other
    symptoms       indicating          a      bacterial           infection       known        as
    chorioamnionitis, a diagnosis that was subsequently confirmed.
    About         four    hours   after       her     arrival      at    NMC,   Murphy’s
    contractions were occurring every two to four minutes.                           Despite
    the seriousness of her symptoms, however, NMC staff failed to
    conduct a pelvic exam until almost seven hours after she arrived
    1
    For simplicity, we shall refer to the defendant as NMC
    even though the named defendant is the United States.
    3
    at the hospital.         It was at this time that hospital personnel
    discovered Murphy’s baby was delivering at the perineum with a
    prolapsed umbilical cord.           Shortly thereafter, J.M. was born —
    limp, blue and without respiration or heart rate.
    Despite the long wait and Murphy’s classification as high-
    risk, NMC medical personnel failed to prepare adequately for the
    baby’s delivery.        No radiant warmer was present in the birthing
    room (and one was not available until 10 minutes after J.M. was
    born),   no   oxygen     equipment    had    been    laid   out   for   use   and
    resuscitation personnel were not present.
    J.M. was born with an omphalocele, a defect in which the
    bowel partly forms outside the body.                His “APGAR score was one
    at one minute, five at five minutes, and six at ten minutes.”
    J.A. 1058.         At one to one-and-a-half minutes post-birth oxygen
    was delivered to J.M. via a manually operated positive pressure
    bag-valve     mask.       Medical    personnel       encountered    difficulty
    intubating J.M. because, a staff anesthesiologist noted, J.M.’s
    airway was “very anterior and extremely difficult to intubate.”
    J.A. 1058.         It is unclear if or when the bag-valve mask was
    connected     to    mechanical   oxygen     though    mechanical   oxygen     was
    administered at the time J.M. was finally intubated on the third
    attempt.      After intubation, J.M. experienced good chest wall
    rise and equal breath sounds bilaterally.                   At two-and-a-half
    4
    minutes J.M. had a heart rate of 60 beats per minute (“bpm”),
    which increased to 120 bpm at four to five minutes post-birth.
    J.M.    suffers     from    cerebral       palsy       and    has     significant
    developmental delays.           Sherita Murphy and her husband, Jonathan
    Murphy, filed     suit    individually         and    as    next    friends       of    J.M.
    alleging that multiple breaches in the standard of care by NMC
    personnel caused J.M.’s cerebral palsy. 2                    At trial, the Murphys
    focused on NMC’s alleged “failure to deliver the infant in an
    appropriate clinical setting; i.e., in a room with appropriate
    personnel and appropriate equipment for resuscitation.”                                 J.A.
    1063.     NMC did not seriously contest that the hospital and its
    staff breached various standards of care.                      Indeed, even NMC’s
    expert, Dr. Dillard, agreed that the medical providers “were not
    ready for this baby.”            J.A. 907.       Significantly, however, the
    Murphys conceded that NMC medical personnel did not contribute
    to   J.M.’s    prematurity       or   to   his    condition         at    the     time    of
    delivery.
    Although     the      parties        essentially          agreed           that     an
    intraventricular        brain    hemorrhage      most       likely       caused     J.M.’s
    cerebral      palsy,    they     disagreed       as    to     the        cause    of     the
    hemorrhage.       The    Murphys      asserted        that    NMC’s       post-delivery
    2
    The Murphys sought damages for J.M.’s physical injuries
    and their own damages for mental anguish and expenses resulting
    from the birth of a child with cerebral palsy.
    5
    breaches in the standard of care triggered an intraventricular
    hemorrhage which caused injury to J.M.’s brain.                                   Specifically,
    the       Murphys       argued        that    J.M.        suffered     from       hypoxia     and
    hypothermia brought about by negligent resuscitation and that
    these two conditions caused his injuries.
    NMC maintained throughout the case that despite the various
    breaches of care with respect to Sherita Murphy and J.M., the
    breaches did not cause J.M.’s injuries.                            At trial NMC maintained
    that J.M. suffered neither significant hypoxia nor hypothermia
    as    a     result      of      the    resuscitative           event       and     that     J.M.’s
    prematurity         combined      with       Mrs.       Murphy’s    chorioamnionitis          most
    likely caused the hemorrhage and the cerebral palsy.
    After         a    three-day           bench       trial,      the    district         court
    determined “that [NMC] breached the standard of care by failing
    to    have     appropriate            resuscitation           equipment          and     personnel
    immediately available upon the delivery of J.M.”                                       J.A. 1064.
    However, the district court also agreed with NMC’s expert, Dr.
    Dillard,      that        (1)     J.M.       did        not   suffer       from        significant
    hypothermia, (2) J.M. did not suffer a hypoxic injury, and (3)
    NMC’s lack of preparation for J.M.’s delivery did not result in
    6
    inadequate      resuscitation. 3          Accordingly,          the    district       court
    concluded       that    the     Murphys         “have     failed      to     prove     that
    defendant’s negligence was more likely than not the cause of
    J.M.’s injuries.”         Id.     Based on these findings, the district
    court entered judgment for NMC.
    The Murphys filed a timely appeal, alleging multiple errors
    by the district court.            Specifically, they argue the district
    court:    (1) reached a verdict that is against the clear weight
    of the evidence, (2) displayed bias and impermissibly restricted
    their    experts’      testimony,     (3)       improperly      relied       on   evidence
    outside    of    the   trial     record,        (4)     erred   in    excluding      NMC’s
    policies and procedures from evidence, (5) erroneously applied
    Virginia law on the burden of proof of causation, and (6) failed
    to award damages and incorrectly ruled that the Murphys were not
    eligible for an award of damages in excess of the cap on damages
    under    Virginia      law.      We   have       jurisdiction         over   the     appeal
    pursuant to 
    28 U.S.C. § 1291
    .
    3
    The district court also determined that even assuming J.M.
    suffered from these conditions as a result of negligent
    resuscitation, the Murphys “have not proved that application of
    the standard of care would have prevented injury in this child,
    thus clearly not meeting the ‘but for’ requirement.” J.A. 1065.
    7
    II.
    A.
    The    Murphys      presented    three    experts   on    causation.        Dr.
    Leichtman,         a     board   certified       pediatrician      and     clinical
    geneticist,        testified     that    J.M.’s    injuries      were    caused     by
    several minutes of hypoxia and hypothermia that J.M. suffered
    during       the   resuscitation.          Dr.    Katz,    a     board    certified
    pediatrician       and     pediatric    neurologist,   testified        that   J.M.’s
    injuries were caused by a “confluence of factors” around the
    time of birth, including the delayed resuscitation event.                         J.A.
    1065.    Finally, Dr. Edwards-Brown, a board-certified radiologist
    and neuroradiologist testified that the hemorrhaging was most
    likely caused by hypoxia and hypothermia, but her opinions were
    confined to the cause of the hemorrhaging, not the cause of the
    hypoxia.       NMC presented the testimony of Dr. Dillard, who is
    board-certified in pediatrics and neonatal/perinatal medicine.
    Dr. Dillard testified that J.M.’s injuries most likely resulted
    from     two           causes:   prematurity        and        Sherita     Murphy’s
    chorioamnionitis.
    The Murphys assert the district court’s judgment is against
    the clear weight of the evidence and on appeal they attack Dr.
    Dillard’s credibility and the scientific basis for his opinions.
    In essence, the Murphys complain that the testimony of their
    three expert witnesses outweighs Dr. Dillard’s testimony.                           We
    8
    disagree and, having reviewed the record as a whole, are of the
    opinion that the district court's findings are neither clearly
    erroneous, see Fed. R. Civ. P. 52(a)(6), nor against the weight
    of the evidence.
    Applying a clear error standard, we “will not
    reverse a lower court's finding of fact simply because
    we would have decided the case differently.”      Easley
    v. Cromartie, 
    532 U.S. 234
     (2001) (internal quotation
    marks omitted).    According to the Supreme Court, we
    can find clear error only if, “‘on the entire
    evidence,’ [we are] ‘left with the definite and firm
    conviction that a mistake has been committed.’”      
    Id.
    (quoting United States v. U.S. Gypsum Co., 
    333 U.S. 364
    , 395 (1948)). We have identified clear error when
    we have determined that, “without regard to what the
    actual facts may be, the findings under review . . .
    are not supported by substantial evidence.”     Stanley
    v. Hejirika, 
    134 F.3d 629
    , 633 (4th Cir. 1998)
    (internal quotation marks omitted); see United States
    v. Whorley, 
    550 F.3d 326
    , 338 (4th Cir. 2008)
    (defining “substantial evidence” as “evidence that a
    reasonable finder of fact could accept as adequate and
    sufficient to support” the finding under review).
    United States v. Manigan, 
    592 F.3d 621
    , 631 (4th Cir. 2010)
    (alteration     in    original).       “We   review    rulings    on     the
    admissibility    of   scientific   evidence    .   .   .   for   abuse    of
    discretion.”     United States v. Prince-Oyibo, 
    320 F.3d 494
    , 497
    (4th Cir. 2003).
    The district court concluded that
    [p]laintiffs’ experts provided scant explanation for
    their conclusions that hypoxia and hypothermia caused
    J.M.’s cerebral palsy.      In contrast, defendant’s
    expert, Dr. Dillard, gave detailed reasoning for his
    conclusion that J.M. suffered neither a hypoxic injury
    nor a hypothermic injury from the resuscitative event.
    Moreover, even assuming that resuscitation-related
    9
    hypoxia and hypothermia caused J.M.’s brain injury,
    plaintiffs have not proved that application of the
    standard of care would have prevented injury in this
    child, thus clearly not meeting the “but for”
    requirement.
    J.A. 1065.
    The   district     court      found      Dr.   Dillard’s    “testimony       in
    explaining      the     bases   for   his     conclusions   .   .   .   to   be     more
    credible and reliable than those of the [Murphys’] experts.”
    J.A. 1066.        “[W]hen a district court's factual finding in a
    bench trial is based upon assessments of witness credibility,
    such finding ‘is deserving of the highest degree of appellate
    deference.’” 4 Evergreen Int’l., S.A. v. Norfolk Dredging Co., 
    531 F.3d 302
    , 308 (4th Cir. 2008) (quoting U.S. Fire Ins. Co. v.
    Allied Towing Corp., 
    966 F.2d 820
    , 824 (4th Cir. 1992)).
    On appeal, the Murphys reiterate on several occasions the
    claim    that    they    presented     “uncontroverted      testimony        that    the
    delayed resuscitation of J.M. caused his hypoxia, which resulted
    in his Grade 4 intraventricular hemorrhage.”                    Br. of Appellant
    at 14.        The testimony cited by the Murphys, however, does not
    4
    We note that Dr. Dillard was the only expert whose
    training and experience focused extensively on the care of sick
    newborn infants with birth defects and that he has published
    articles on the relationship between cerebral palsy and
    prematurity. Dr. Dillard has also been involved in researching
    the association between cerebral palsy and chorioamnionitis.
    Clearly, we cannot say the district court erred in affording Dr.
    Dillard’s testimony significant weight.
    10
    support     this    conclusion.      Dr.   Dillard   testified    on   cross-
    examination as follows:
    Q.     And correct me if       I’m wrong, but I believe
    you testified on        direct examination that
    when a baby has a        Grade 4 intraventricular
    hemorrhage, that’s      caused by low oxygen and
    low blood pressure?
    A.    I think those are two things             that could
    definitely be associated with            a Grade 4
    hemorrhage.
    J.A. 899 (emphasis added).           This testimony by Dr. Dillard does
    not   address       the   Murphys’     contention    that   a      delay   in
    resuscitation by NMC personnel caused hypoxia and J.M.’s brain
    hemorrhage.        To the contrary, Dr. Dillard explicitly testified
    on direct examination as follows:
    Q.    In your opinion did J.M. sustain any injury
    — well, first of all did J.M. have hypoxia?
    A.    No.   Well, let me put it another way.  I’m
    sure, just as most babies did, he had
    hypoxia at birth which is almost universal,
    but the big question is did he have hypoxia
    to the extent that it caused injury.
    Q.    Did he?
    A.    No, he did not.
    J.A. 880.
    Dr. Dillard reiterated this point on cross-examination:
    Q.    And you agree that hypoxia          makes it    more
    likely    that     a    baby          will      have
    intraventricular hemorrhage?
    A.    Again, it’s a matter of degree of hypoxia.
    As I explained earlier, all babies have some
    11
    degree of hypoxia at birth, but of course
    all babies who are born prematurely and have
    hypoxia     at     birth     don’t    develop
    intraventricular hemorrhage.      It takes a
    significant degree of hypoxia to result in
    interventricular     hemorrhage,    and    my
    contention is that this baby did not have
    significant hypoxia.
    J.A. 902-03.
    Dr. Dillard’s conclusion that J.M. did not suffer a lack of
    oxygen significant enough to cause his brain hemorrhage and his
    resulting deficits is fully supported by the record.       As the
    district court explained:
    Plaintiffs have not proved by a preponderance of
    the evidence that application of the standard of care
    would have prevented any hypoxic injury that J.M. may
    have had.    Plaintiffs experts testified that medical
    providers breached the standard of care by failing to
    have oxygen available at the moment of birth and
    failing to have “adequate” resuscitation personnel and
    equipment present at birth.         Oxygen was however
    available at approximately one minute of life and the
    medical   record   discloses   that   positive  pressure
    ventilation with bag-valve mask was begun immediately
    thereafter.    The Court is troubled that plaintiffs’
    experts glossed over this early access to oxygen as if
    it could be ignored, indicating that four to five
    minutes passed before oxygen of sufficient quantity
    was administered.    Given that the plaintiffs’ experts
    did not address the bag-valve provision of oxygen,
    there is no testimony that this early provision of
    oxygen was insufficient for the purposes of preventing
    brain damage.    Importantly, there is no evidence in
    the testimony or expert reports of the plaintiffs
    regarding the period of time that a neonate can
    sustain hypoxia without suffering brain injury.
    J.A. 1076.
    12
    Although the Murphys acknowledge on appeal that “[o]xygen
    was not available to the baby until one minute of life, and was
    not provided via bag-valve-mask until 1½ to 2 minutes of life,”
    they nonetheless draw the conclusion, entirely unsupported by
    their experts’ testimony, that “[s]ince no oxygen was getting to
    his brain during this time period, J.M.’s brain hemorrhaged and
    was   permanently   damaged.”    Br.       of    Appellant     at    5   (internal
    citation    omitted).    Only   one    of       the    Murphys’     experts,   Dr.
    Leichtman, broached the subject by testifying that “we generally
    like to get a resuscitation event over by one to three minutes.”
    J.A. 611.     As the district court explained, Dr. Leichtman did
    not testify that this threshold was significant enough to cause
    injury to a baby generally or to J.M. in particular.                     Moreover,
    Dr. Dillard stated that while adults can sustain brain injury
    after “just a minute or two or three,” premature infants like
    J.M. could withstand injury from a lack of oxygen for “somewhat
    longer.”    J.A. 880.
    In addition to countering the Murphys’ experts’ conclusions
    that hypoxia and hypothermia caused J.M.’s injuries, Dr. Dillard
    testified extensively about the causes of J.M.’s impairments.
    With considerable explanation Dr. Dillard concluded that “[a]
    variety of complications that are related to prematurity were
    significantly   additive   in   the    causation        of   [J.M.’s]     cerebral
    palsy.”     J.A. 854.   He also offered               his opinion that “[t]he
    13
    mother’s     chorioamnionitis          is    strongly      associated     with     the
    development of . . . Grade 4 hemorrhage[s] . . . .”                       J.A. 838.
    According to Dr. Dillard, various studies demonstrate that the
    association    is    “very     statistically        significant;       meaning    that
    there’s    less     than   a    one-in-20        chance   of   there   being,     this
    occurring by chance alone.”            J.A. 838.
    Not only did Dr. Dillard offer his own causation testimony
    with      respect     to       prematurity         and    chorioamnionitis,         he
    specifically      rebutted     the    causation      testimony    offered    by    the
    Murphys’    experts.       The       district     court   found   this    testimony
    credible and persuasive.
    Our system of justice rests on the general
    assumption that the truth is not to be determined
    merely by the number of witnesses on each side of a
    controversy. In gauging the truth of conflicting
    evidence, [the factfinder] has no simple formulation
    of weights and measures upon which to rely. The
    touchstone is always credibility; the ultimate measure
    of testimonial worth is quality and not quantity.
    Triers of fact in our fact-finding tribunals are, with
    rare exceptions, free in the exercise of their honest
    judgment, to prefer the testimony of a single witness
    to that of many.
    Weiler v. United States, 
    323 U.S. 606
    , 608 (1945).
    In short, the record contains ample evidence to support the
    district court’s factual, legal and credibility determinations.
    Accordingly, we find no error.
    14
    B.
    The Murphys next assert that the district court harbored a
    bias    in   favor        of    NMC    and    against        them,      their     experts,        and
    medical      malpractice          suits      generally.               In    support     of     this
    assertion     they        cite     various        rulings         and      statements     by      the
    district court as evidence of bias.                         As NMC points out, however,
    the    Murphys   never          made    a    motion        for   recusal      pursuant       to    
    28 U.S.C. § 455
    , which requires a judge to “disqualify himself in
    any proceeding in which his impartiality might reasonably be
    questioned”      or       “[w]here      he    has      a   personal        bias   or    prejudice
    concerning       a        party,       or     personal           knowledge        of     disputed
    evidentiary facts concerning the proceeding.”                               28 U.S.C. 455(a)-
    (b)(1).
    “The rule that an objection must be timely raised with the
    trial    court       to    preserve         the     right        of   appellate        review     is
    elementary,      and       it    is    of    long      standing.”           United     States      v.
    Godwin, 
    272 F.3d 659
    , 672 (4th Cir. 2001).                                  In this case, the
    Murphys failed to raise most of these issues with the district
    court and made no motion for recusal based on any alleged bias.
    Therefore, except for evidentiary rulings subject to a proper
    objection, any alleged errors are subject to plain-error review.
    See, e.g., United States v. Berger, 
    375 F.3d 1223
    , 1227 (11th
    Cir. 2004) (“Ordinarily, we review a judge's decision not to
    recuse him or herself for an abuse of discretion.                                        However,
    15
    because [appellant] failed to seek recusal of the district judge
    in   the    proceedings       below,      we    review       his    recusal      request      for
    plain      error.”)    (internal       citation        omitted);          United    States     v.
    Cruz-Mercado,         
    360 F.3d 30
    ,    36       (1st    Cir.     2004)    (“[Appellant]
    neither objected to the[] comments nor sought recusal of the
    trial      judge   based       on   partiality,             limiting       our      review     to
    assessing only whether plain error occurred.”).
    Aside from several instances in which the district court
    restricted their admission of evidence or dealt with Murphys’
    counsel in what the Murphys consider a brusque, impatient or
    sarcastic manner (unreasonably in the Murphys’ view), they offer
    only    one     specific       statement         by        the     district        court     that
    demonstrates a potential bias.                      In that instance the district
    court expressed its awareness of several doctors who had left
    the profession because of rising medical malpractice premiums.
    During a conversation with the Murphys’ counsel concerning the
    court’s      refusal    to    admit    NMC’s        policies        and    procedures        into
    evidence, the district court made the following statement:
    The Court:            And     consequently     in     that
    particular case, the trial judge
    felt under his discretion that he
    could admit that particular rule.
    So far as it’s discretionary I
    wouldn’t admit it, because what I
    think is the standard is going to
    have    to    be     the    standard
    established for all the particular
    profession or the industry itself.
    If we start on this, then what we
    16
    do is we actually get — I think
    oftentimes   we   get    so    often
    enmeshed in these things, I think
    it’s important to understand that
    if you establish such a thing,
    what you do is decry people from
    making rules that are beneficial
    and   you   decry   industries    or
    companies from doing it.         And
    it’s, there is no question you do.
    Because once a lawyer’s [sic] get
    ahold of it they say don’t make a
    rule, don’t do this, don’t do
    that, you’re going to get sued.
    As it is right now, where are we
    with obstetricians?    I think at
    least three of them I know have
    quit the profession because of the
    cost on the malpractice coverage
    which is 90-some thousand dollars
    a year.
    J.A. 748 (emphasis added).   The district court’s statement does
    not constitute plain error for several reasons.
    The Supreme Court explained in Liteky v. United States, 
    510 U.S. 540
     (1994), that
    judicial rulings alone almost never constitute a valid
    basis for a bias or partiality motion.      See United
    States v. Grinnell Corp., 384 U.S., at 583. In and of
    themselves (i.e., apart from surrounding comments or
    accompanying opinion), they cannot possibly show
    reliance upon an extrajudicial source; and can only in
    the rarest circumstances evidence the degree of
    favoritism or antagonism required (as discussed below)
    when no extrajudicial source is involved.       Almost
    invariably, they are proper grounds for appeal, not
    for recusal.   Second, opinions formed by the judge on
    the basis of facts introduced or events occurring in
    the course of the current proceedings, or of prior
    proceedings, do not constitute a basis for a bias or
    partiality motion unless they display a deep-seated
    favoritism or antagonism that would make fair judgment
    impossible.   Thus, judicial remarks during the course
    17
    of a trial that are critical or disapproving of, or
    even hostile to, counsel, the parties, or their cases,
    ordinarily do not support a bias or partiality
    challenge.  They may do so if they reveal an opinion
    that derives from an extrajudicial source; and they
    will do so if they reveal such a high degree of
    favoritism or antagonism as to make fair judgment
    impossible.
    Id. at 555 (emphasis added).
    The district court’s statement was made in the context of
    explaining     its      ruling    refusing      to       admit    NMC’s      policies      and
    procedures.       According to the district court, such materials do
    not constitute the standard of care in the industry but instead
    reflect    the     aspirational         goals       of    the     organization.             In
    explaining its ruling to counsel, the district court was stating
    its belief that hospitals would not adopt such policies for fear
    of    having   them     used     at   trial    to    establish         a    breach    in   the
    standard of care when, in fact, the standard of care reflects
    the    standard    in    the     medical      community      as    a       whole,    not   the
    standard at a particular institution.
    Immediately after making the statement the district court
    elaborated that
    the question here in my mind is simple:       Has the
    Portsmouth Naval Hospital violated the standards that
    are generally acceptable among the medical profession
    at the time and place of the incident in question?
    And did it cause the injuries of the plaintiff?   And
    if so, to what extent? That’s what we’re really doing
    here.
    18
    J.A. 749.     This statement by the district court makes clear that
    it   was   mindful       of   its      duties       and     was    entirely    capable    of
    rendering fair judgment.                There is simply nothing in the record
    indicating        that     the        district       court        held   “a    deep-seated
    favoritism or antagonism [towards the Murphys] that would make
    fair judgment impossible.”               Liteky, 
    510 U.S. at 555
    .
    Our review of the record also leads to the conclusion that
    no error occurred with respect to the remaining conduct cited by
    the Murphys as examples of bias.                       Though some comments by the
    district court might be considered “stern and short-tempered,”
    they fall     within       the       categories       of    statements      that   will   not
    constitute bias.         Liteky, 
    510 U.S. at 556
    ; see also 
    id.
     at 555-
    56   (“Not        establishing          bias     or        partiality,      however,      are
    expressions of impatience, dissatisfaction, annoyance,                             and even
    anger, that are within the bounds of what imperfect men and
    women,     even    after      having     been       confirmed       as   federal    judges,
    sometimes    display.            A    judge's       ordinary      efforts     at   courtroom
    administration-even a stern and short-tempered judge's ordinary
    efforts at courtroom administration-remain immune.”).
    C.
    The Murphys also claim they are entitled to a new trial
    because the district court relied on evidence outside the trial
    record.
    19
    We have granted a new trial “only in the most extreme
    of cases” where a judge demonstrated personal bias
    against   a    litigant   because   of   reliance    on
    extrajudicial sources.    Aiken County v. BSP Div. of
    Envirotech Corp., 
    866 F.2d 661
    , 678 (4th Cir. 1989);
    see generally Crandell v. United States, 
    703 F.2d 74
    ,
    75-76 (4th Cir. 1983). And a court's consideration of
    material outside the record does not generally raise
    issues of constitutional magnitude.        See    Aiken
    County, 
    866 F.2d at 678
     (“We do not think, however,
    that the two memoranda received by the judge and the
    ancillary ex parte contacts in this case approach the
    magnitude of constitutional error.”).
    ePlus    Tech.,   Inc.   v.   Aboud,    
    313 F.3d 166
    ,   178–79     (4th   Cir.
    2002).
    As with the Murphys’ previous allegations of bias by the
    district court, the record shows that they did not object when
    the trial judge informed them that he would be looking up the
    experts on the Internet to see “[w]hat their field of expertise
    is, what they have written, what they have not written.”                      J.A.
    95.     Having failed to object, the question becomes whether the
    trial court’s doing so (or at least saying it was going to do
    so) constitutes plain error.            It does not.         The most obvious
    reason no substantial error occurred is because, as NMC notes,
    the district court indicated it was going to review information
    on all the experts, not just the Murphys’ witnesses.                   Moreover,
    the Murphys have made no showing of any prejudice by virtue of
    the district court’s research, if indeed it occurred.
    The Murphys also object to various other statements by the
    district    court   indicating     an    effort      to   read   the   materials
    20
    provided by the parties and referenced by the experts.                                 Having
    reviewed these statements, we conclude they indicate little more
    than a diligent effort by the district court to absorb the vast
    amounts of medical information referenced or relied upon by the
    parties’ experts.             Conduct the Murphys consider “prejudicial,”
    we believe illustrates conscientious attention to the district
    court’s duties.         Indeed, the Murphys concede that “[w]hen a fact
    finder      relies    on     outside     evidence,        for   the    alleged      bias   and
    prejudice        to    be      disqualifying,             it    must     stem       from    an
    extrajudicial source and result in an opinion on the merits on
    some     basis       other     than     what        the    judge      learned       from   his
    participation in the case.”                 Br. of Appellant at 35 (emphasis
    added).       The Murphys do not cite one statement in the district
    court’s opinion as an example of “misconduct” and our review of
    the record reveals that the district court undertook its role as
    fact-finder quite seriously.                   Regardless of what materials it
    may    have    considered,         its    opinion         falls       easily    within     the
    confines of the evidence presented at trial.
    D.
    The Murphys further contend the district court erred in
    refusing to admit excerpts of NMC’s labor and delivery manuals
    on    the    limited       issue   of     causation.            Relying        on   Riverside
    Hospital,      Inc.    v.     Johnson,     
    636 S.E.2d 416
        (Va.     2006),     they
    assert that Virginia law allows the admission of a hospital’s
    21
    written policies and procedures for such a limited purpose.              We
    disagree.
    In 1915 the Supreme Court of Virginia held that
    [a] person cannot, by the adoption of private rules,
    fix the standard of his duty to others. That is fixed
    by law, either statutory or common. Private rules may
    require of employ[e]es less or more than is required
    by law; and whether a given course of conduct is
    negligent, or the exercise of reasonable care, must be
    determined by the standard fixed by law, without
    regard to any private rules of the party.
    Virginia Ry. & Power Co. v. Godsey, 
    83 S.E. 1072
    , 1073 (Va.
    1915); see also Pullen v. Nickens, 
    310 S.E.2d 452
    , 457 (Va.
    1983)       (reaffirming   Godsey   and   holding   that   State    Highway
    Department’s internal rules were inadmissible).            This Court has
    previously      recognized   Virginia’s    longstanding    rule    in   this
    regard and determined that “the Virginia rule is sufficiently
    bound-up with state policy so as to require its application in
    federal court.”       Hottle v. Beech Aircraft Corp., 
    47 F.3d 106
    ,
    110 (4th Cir. 1995). 5
    5
    The Murphys argue that we should review the district
    court’s refusal to admit the policies and procedures de novo.
    NMC asserts that the district court’s refusal to admit the
    material constitutes a ruling on the admissibility of evidence
    that is reviewed for an abuse of discretion.   Because we have
    already determined that Virginia’s preclusion of “policies and
    procedures,” albeit evidentiary in nature, is substantive, our
    “review of a district court's interpretation or application of
    state law is de novo.”   Bryte ex rel. Bryte v. Am. Household,
    Inc., 
    429 F.3d 469
    , 475 (4th Cir. 2005) (citing       James v.
    Circuit City Stores, Inc., 
    370 F.3d 417
    , 421-22 (4th Cir.
    2004)).
    22
    Even     though      the     Murphys     allege      that    they      sought      to
    introduce NMC’s policies and procedures “for the limited purpose
    of establishing causation,” they admit seeking the introduction
    of such evidence “because these manuals clearly establish that
    Government providers knew the standard of care would prevent the
    injury suffered by J.M.”              Br. of Appellants at 39.               The Murphys
    also   assert       that   in     Riverside    the    Supreme      Court     of   Virginia
    “ruled    that      the    defendant    hospital’s         policies    and    procedures
    were admissible over the same objection offered by [NMC] in this
    case.”    Br. of Appellants at 43.
    As an initial matter, because the procedure manuals cannot
    be introduced to establish the standard of care, we fail to see
    how the information could show the “providers knew the standard
    of care” in the community as a whole would have prevented J.M.’s
    injuries.           Moreover,        Riverside       does    not      stand       for    the
    proposition asserted by the Murphys because that case did not
    involve       the   hospital’s       “policies       and    procedures.”           As    the
    Supreme Court of Virginia plainly stated, “the evidence of the
    staff orientation instruction and nursing curriculum, although
    dealing with the issue of fall-risk assessment and prevention,
    were not hospital policies or procedures of the type involved in
    Godsey and Pullen.”             Riverside, 636 S.E.2d at 422.              In this case
    the Murphys sought to introduce excerpts from NMC’s labor and
    delivery       policy      manuals     which     they      admit    constitute          NMC’s
    23
    “policy    and    procedure   manuals.”         Br.   of   Appellants   at   39.
    Accordingly, the district court correctly interpreted Virginia
    law and did not err by excluding this evidence.
    E.
    The final claim of error we must consider is the Murphys’
    claim that the district court erroneously applied Virginia law
    on the burden of proof of causation.                  They stress that under
    Virginia law they were only required to prove it was more likely
    than not that NMC’s negligence was a cause of J.M.’s injuries,
    not that it was the sole cause.                In other words, the Murphys
    argue they were “not required to prove that hypoxia was ‘the
    only’ cause of J.M.’s injuries, [but] rather ‘a’ cause of J.M.’s
    injuries.”       Br. of Appellants at 50.        The parties agree that our
    review of the district court’s application of state law is de
    novo.   See note 5, supra.
    The    obvious    problem    for    the    Murphys    is   that,   in   the
    district court’s view, they failed even to prove that hypoxia
    was “a” cause of J.M.’s deficits, much less “the” cause.                As the
    district court explained:         “Dr. Dillard concluded that J.M. was
    not exposed to a significant enough deprivation of oxygen during
    the resuscitation event to cause a hypoxic injury in the brain.”
    J.A. 1072 (emphasis added).           According to the district court, it
    “believed    the    testimony    of   Dr.    Dillard    while   rejecting    the
    24
    conclusions of the [Murphys’] experts.”      Id.   Based on these
    factual findings, the district court concluded that
    [t]he reports and testimony [of the Murphys’ experts]
    provided little in the way of any explanation or basis
    for their opinions that hypoxia and hypothermia
    resulted from defendant’s failure to follow the
    standard   of  care   for  resuscitations,  ultimately
    causing J.M.’s cerebral palsy. The Court hereby finds
    that [the Murphys’] experts’ conclusions on the
    standard of care are credible, but further finds their
    conclusions on causation not credible.
    J.A. 1078.
    We agree with NMC that “[a]bsent credible proof of this
    essential factual predicate, any discussion of Virginia law on
    causation is irrelevant.”   Br. of Appellee at 54.    We therefore
    conclude the district court did not err. 6
    III.
    Having reviewed the record, the parties' briefs, and the
    applicable law, and having had the benefit of oral argument, we
    find no error and, for the reasons stated herein, affirm the
    judgment of the district court.
    AFFIRMED
    6
    The Murphys make two final challenges to the district
    court’s verdict in favor of NMC. They assert the district court
    erred by (1) failing to award damages and (2) ruling that their
    claims were subject to Virginia’s cap on damages for medical
    malpractice awards.     In light of our conclusion that the
    district court did not err in entering judgment for NMC, we need
    not address these issues.
    25