Charles Ly v. Rodney Schmidt, M.D. ( 2007 )


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  •       TEXAS COURT OF APPEALS, THIRD DISTRICT, AT AUSTIN
    NO. 03-06-00435-CV
    Charles Ly, Appellant
    v.
    Rodney Schmidt, M.D., Appellee
    FROM THE DISTRICT COURT OF TRAVIS COUNTY, 200TH JUDICIAL DISTRICT
    NO. D-1-GN-06-001242, HONORABLE STEPHEN YELENOSKY, JUDGE PRESIDING
    MEMORANDUM OPINION
    Charles Ly appeals from the district court’s grant of summary judgment in favor of
    Rodney Schmidt, M.D. Ly asserts that the evidence presents fact issues regarding standard of care
    and causation. We affirm the judgment.
    BACKGROUND
    On June 1, 2001, Ly sued Seton Medical Center, Albert Horn, M.D., Sam S. Roberts,
    M.D., Sara Austin, M.D., Kent Ellington, M.D., and Rodney Schmidt, M.D., alleging negligence
    “during the course of medical treatment provided by the above named Defendants . . . beginning on
    or about March 8, 1999 through March 14, 1999” after Ly suffered a stroke. Dr. Schmidt is a board-
    certified neuroradiologist who interpreted a CT scan of Ly’s head taken on March 8. Ly alleged that
    Dr. Schmidt misinterpreted the results of this scan and/or failed to properly communicate his
    interpretation of the scan to Ly’s emergency room physicians. Ly contended that Dr. Schmidt’s acts
    or omissions resulted in the administration of anti-coagulation medicine that Ly alleges caused him
    to suffer a brain hemorrhage on March 14, 1999.
    On October 3, 2005, Dr. Schmidt filed a motion for summary judgment under rule
    166a(c), alleging that the evidence conclusively establishes that Dr. Schmidt did not breach the
    applicable standard of care in his interpretation of or communications regarding Ly’s CT scan and
    that any alleged breach of the standard of care was not a proximate cause of Ly’s injuries. On
    January 19, 2006, the district court granted Dr. Schmidt summary judgment without specifying the
    grounds1 and subsequently overruled a motion for rehearing. The court later severed out Ly’s claims
    against Dr. Schmidt, making the judgment final. Ly appeals from this summary judgment.2
    1
    The district court initially granted Dr. Schmidt’s summary judgment motion on January 16.
    At the time, Ly, who was acting pro se, had not filed a response, although Dr. Schmidt’s motion had
    been pending since October. The record also reflects that the district court had previously denied
    Ly’s motion for continuance of the summary judgment hearing and that Ly had obtained several prior
    postponements of dispositive proceedings in the litigation due in part to his difficulties in retaining
    counsel. Following the district court’s summary judgment order, Dr. Schmidt’s counsel received
    a copy of Ly’s summary-judgment response and motion for extension of time, and furnished a copy
    to the district court. On January 19, the district court signed a first amended order granting
    Dr. Schmidt’s summary judgment motion in which it acknowledged having considered Ly’s response
    and motion for extension of time.
    2
    This is Ly’s third appeal arising from this litigation. See Ly v. Austin, No. 03-05-00516-
    CV, 2007 Tex. App. LEXIS 5475 (Tex. App.—Austin July 13, 2007, no pet. h.) (mem. op.)
    (affirming district court’s dismissal of Ly’s claims against defendants Austin and Ellington); Ly
    v. Seton Medical Center, No. 03-05-00515-CV (Tex. App.—Austin Mar. 8, 2007) (granting joint
    motion to dismiss appeal pursuant to settlement agreement).
    2
    DISCUSSION
    Standard of review
    We review the district court’s summary judgment de novo. Valence Operating Co.
    v. Dorsett, 
    164 S.W.3d 656
    , 661 (Tex. 2005); Provident Life & Accident Ins. Co. v. Knott,
    
    128 S.W.3d 211
    , 215 (Tex. 2003). When reviewing a summary judgment, we take as true all
    evidence favorable to the non-movant, and we indulge every reasonable inference and resolve any
    doubts in the non-movant’s favor. Valence Operating 
    Co., 164 S.W.3d at 661
    ; 
    Knott, 128 S.W.3d at 215
    . Summary judgment is proper when there are no disputed issues of material fact and
    the movant is entitled to judgment as a matter of law. Tex. R. Civ. P. 166a(c); Shell Oil Co. v. Khan,
    
    138 S.W.3d 288
    , 291 n.4 (Tex. 2004) (citing 
    Knott, 128 S.W.3d at 215
    -16). A movant who
    conclusively negates at least one essential element of a cause of action is entitled to summary
    judgment on that claim. Southwestern Elec. Power Co. v. Grant, 
    73 S.W.3d 211
    , 215 (Tex. 2002).
    Because the district court’s order does not specify the grounds for its summary judgment, we must
    affirm the summary judgment if any of the theories presented to the district court are meritorious.
    
    Knott, 128 S.W.3d at 216
    .
    Summary judgment grounds
    To establish negligence in a medical malpractice case, a plaintiff must show (1) a
    legal duty, (2) a breach of that duty, and (3) damages proximately caused by the breach. IHS Cedars
    Treatment Ctr. v. Mason, 
    143 S.W.3d 794
    , 798 (Tex. 2003); Columbia Med. Ctr. Subsidiary, L.P.
    v. Meier, 
    198 S.W.3d 408
    , 414 (Tex. App.—Dallas 2006, pet. denied). In his motion for summary
    judgment, Dr. Schmidt contended that the evidence conclusively established that he did not breach
    3
    the applicable standard of care and that, even if he did, such breach was not the proximate cause of
    Ly’s hemorrhage. We agree with the district court that Dr. Schmidt is entitled to summary judgment
    as to both elements.
    Standard of care
    The threshold question in a medical malpractice case is the standard of care. Jones
    v. Miller, 
    966 S.W.2d 851
    , 854 (Tex. App.—Houston [1st Dist.] 1998, no pet.). In determining
    that standard, the court must be guided solely by expert opinion. Armbruster v. Memorial Sw. Hosp.,
    
    857 S.W.2d 938
    , 941 (Tex. App.—Houston [1st Dist.] 1993, no writ). A summary judgment may
    be based on the uncontroverted affidavit of an interested witness if the testimony is clear, positive,
    direct, otherwise credible, free from contradictions and inconsistencies, and capable of being readily
    controverted. Tex. R. Civ. P. 166a(c); Trico Techs. Corp. v. Montiel, 
    949 S.W.2d 308
    , 310
    (Tex. 1997); Republic Nat’l Leasing Corp. v. Schindler, 
    717 S.W.2d 606
    , 607 (Tex. 1986); First
    Nat’l Bank v. Lubbock Feeders, L.P., 
    183 S.W.3d 875
    , 881 (Tex. App.—Eastland 2006, pet. denied).
    In Dr. Schmidt’s affidavit, which he attached as evidence to his motion for summary
    judgment, Dr. Schmidt explained the standard of care applicable to a neuroradiologist interpreting
    CT studies of the head:
    Specifically, in reviewing a head CT scan such as that performed upon Charles Ly
    on March 8, 1999, the standard of care required a neuroradiologist to evaluate the
    entire film study for imaging abnormalities which may represent a possible cerebral
    vascular accident (i.e. stroke), and to timely report such findings to the patient’s
    treating physician. . . . The standard of care also requires the neuroradiologist to
    evaluate the entire film study for any signs of acute or ongoing hemorrhages or bleeds
    in the patient’s brain, and to timely report such findings to the patient’s treating
    physician.
    4
    In diagnosing a potential hemorrhage, the standard of care requires a neuroradiologist
    to differentiate a potential hemorrhage in the patient’s brain from other benign
    findings such as dystrophic calcification which also shows up as a high brain density
    or white area on the head CT scan.
    To summarize, Dr. Schmidt averred that the standard of care requires a neuroradiologist to evaluate
    the entire CT scan, identify and investigate imaging abnormalities which might represent a stroke
    or hemorrhage, and timely communicate any relevant findings to the patient’s treating physicians.
    Ly does not dispute that this is the applicable standard of care for neuroradiologists.
    Dr. Schmidt’s affidavit shows that he followed this standard of care. Dr. Schmidt
    stated that he examined the entire film, noted on his report the “absence of edema, mass effect, or
    sulcal effacement,” and focused the computer onto an area of high density, performing measurements
    on that critical area. Dr. Schmidt concluded:
    Based upon my review of the entire March 8, 1999 head CT film series . . . I made
    a determination and timely communicated to the emergency room physicians the
    following: “[s]ome high density in the basal ganglia favors dystrophic type
    calcification over petechial hemorrhage.” It is thus my expert opinion that my review
    and interpretation of Charles Ly’s head CT scan from March 8, 1999 met all
    applicable standards of care, and that I was not negligent in my care of Charles Ly.
    It is this interpretation, “favor[ing] dystrophic type calcification over petechial
    hemorrhage,” that serves as the basis of Ly’s complaint against Dr. Schmidt. Ly asserts that the
    results of the scan actually favored a hemorrhage, and that if Dr. Schmidt had properly interpreted
    and/or communicated the results to Ly’s treating physicians, they would not have prescribed Ly the
    anti-coagulation medication that Ly alleges caused him to suffer a hemorrhage.
    5
    However, Dr. Schmidt provided summary judgment evidence conclusively
    establishing that his interpretation was proper. During his deposition, Dr. Albert Horn, M.D., a
    board-certified neurologist who was also a defendant in the original action, was asked if he believed
    that the area of high density favored calcification over hemorrhage. Dr. Horn testified that he was
    “absolutely 100 percent certain” that it did. Furthermore, Dr. Sara Austin, M.D., another board-
    certified neurologist and also a defendant, testified during her deposition that the area of high density
    identified by Dr. Schmidt was consistent with what she had visualized in Ly’s previous radiological
    films.3 Dr. Austin also testified that she agreed that the area of high density was not an acute
    hemorrhage and “would have had to have been there for at least two more years.”
    Additionally, Ly’s own neuroradiological expert, Dr. Philip Shalen, M.D., testified
    during his deposition that although he disagreed with Dr. Schmidt’s interpretation of the CT scan,
    he thought that Dr. Schmidt’s interpretation was reasonable and satisfied the applicable standard of
    care:
    Q:      Do you disagree with the interpretation that Dr. Schmidt made in that March
    8, 1999 CT scan?
    A:      Yes.4
    3
    As will be discussed in more detail below in our discussion of proximate cause, Ly was
    treated for a brain injury at Brackenridge Hospital in January 1997. The previous films were related
    to the 1997 injury.
    4
    In his deposition, Dr. Shalen originally said, “No.” However, he amended his deposition
    to reflect that he did disagree with Dr. Schmidt’s interpretation. Dr. Shalen made other amendments
    to his deposition, none of which are relevant to this appeal. There is some dispute about whether
    Dr. Shalen’s amended deposition answers were admissible. We need not resolve that dispute,
    because even if the amended answers were admissible, they do not change Dr. Shalen’s ultimate
    conclusion that, even though he disagreed with Dr. Schmidt’s interpretation of the CT scan, he
    thought that Dr. Schmidt’s interpretation was reasonable and met the standard of care.
    6
    Q:      Okay. Do you think his interpretation was reasonable and met the standard
    of care?
    A:      Yes.
    Q:      And that’s for a neuroradiologist practicing in Austin, Texas in 1999; would
    that be correct?
    A:      Yes.
    ....
    Q:      Let me back up to a few things you’ve said. One is you said there’s more on
    these images than he’s put in the report.
    A:      Correct.
    Q:      But you do not feel that it was a breach of the standard of care, correct?
    A:      No, because people disagree as to what’s on a scan.
    ....
    Q:      My question to you, though, is are you going to say at the time of trial or at
    the time of the hearing in this case that it was a breach of the standard of care
    for Dr. Schmidt to have not included additional information that you feel
    exists on those images in the report?
    A:      I don’t think it’s the breach of the standards of care [sic].
    Ly further asserts that even if Dr. Schmidt’s interpretation of the scan did not breach
    the standard of care, Dr. Schmidt’s failure to communicate the possibility of a hemorrhage to Ly’s
    treating physicians did. However, Dr. Schmidt provided summary judgment evidence that he
    communicated that possibility to the emergency room doctors. Again, Ly’s own expert, Dr. Shalen,
    provided testimony that actually supports Dr. Schmidt’s position:
    7
    A:      My only issue with this case is the reporting of the possibility that
    hemorrhage might exist.
    Q:      And you agree that was reported in the dictated report?
    A:      It was in the dictated report.
    Q:      And if normal practice had been followed - or strike that. You don’t have
    any evidence to contradict Dr. Schmidt’s testimony that that’s also what he
    would have communicated to the emergency room doctor?
    A:      No, I don’t have any evidence that, you know, he wouldn’t communicate the
    same thing that he typed.
    Q:      That’s - that’s normally the way it goes?
    A:      That’s normally the way we do it.
    Dr. Shalen further testified that oral communication of the findings was important:
    Q:      . . . [Y]ou’ve testified earlier you feel the standard would have been met if Dr.
    Schmidt had reported the findings on his radiology report to the emergency
    room physician?
    A:      Right. And I’d - if you’d allow me. You know, I put that in writing and said
    if a determined attempt was made by the neuroradiologist to orally
    communicate the CT findings, then no breach in the standard of medical care
    occurred.
    Q:      And do you still agree with that?
    A:      I still agree with that.
    Dr . Shalen concluded that if Dr. Schmidt made a telephone call and communicated with the ER
    doctor, there would be no breach:
    8
    Q:      Okay. But we can agree, can we not, that what’s important is that the call
    was made?
    A:      It is important that the call was made.
    Q:      Well, that - No. That’s everything because if Dr. Schmidt made that call and
    spoke to an ER doctor, then you’ve told me he has met his standard of care.
    A:      If Dr. Schmidt made the call and spoke to the ER doctor, then he’s, you
    know, he’s done the right thing as far as I’m concerned.
    The evidence further established that Dr. Schmidt indeed made that call and spoke
    to an emergency room physician. In his affidavit, Dr. Schmidt testified:
    Following my interpretation of Charles Ly’s head CT scan on March 8, 1999, and
    prior to dictating my report herein, I made a contemporaneous telephone call to the
    emergency room to discuss the pertinent findings on Charles Ly’s head CT scan. In
    reference to Charles Ly’s March 8, 1999 head CT scan, I communicated the pertinent
    findings to either Dr. Roberts or another emergency room physician. Specifically,
    my communications to such physician included all pertinent portions of my dictated
    report including, but not limited to the following: (a) I communicated my differential
    diagnosis favoring dystrophic calcification over hemorrhage; (b) I communicated the
    fact I could not absolutely rule out a hemorrhage in Charles Ly; and (c) I
    recommended further MRI imaging to follow up on this patient.
    Dr. Shalen’s testimony confirms that Dr. Schmidt made the call:
    Q:      The report specifically says “Preliminary results of this study were telephoned
    to the ER upon its completion contemporaneously,” correct?
    A:      That’s what it says.
    ....
    Q:      Okay. Can you point to any evidence in this case that indicates the statement
    “Preliminary results of this study were telephoned to the ER” was incorrect?
    A:      No.
    9
    Ly provided no competent summary judgment evidence to controvert the above
    evidence establishing that Dr. Schmidt satisfied the applicable standard of care. Ly attached to
    his response to the motion for summary judgment Dr. Shalen’s affidavit. The affidavit identifies
    the applicable standard of care for a neuroradiologist, but it does not state that the standard of care
    was breached. Dr. Shalen states that “there is no indication in the ER notes that either doctors
    Roberts or Austin were aware that the CT findings included the possibility of hemorrhage,” but this
    is not evidence of Dr. Schmidt’s negligence. In fact, Dr. Shalen does not even refer to Dr. Schmidt
    in the affidavit.
    Ly also attached to his response to the motion for summary judgment (and to his
    appellate brief) copies of his CT scans and medical articles, essentially asking the district court and
    now this Court to independently determine that Dr. Schmidt’s interpretation of the results of the CT
    scan was incorrect. However, we are judges, not doctors, and we cannot make such a determination
    in the absence of expert testimony. See Williams v. Huber, 
    964 S.W.2d 84
    , 86 (Tex. App.—Houston
    [14th Dist.] 1997, no pet.) (“In a medical malpractice case, both the establishment and preclusion
    of summary judgment are dependent upon expert testimony.”).
    Ly also attached to his response an affidavit by Ralph Lilly, M.D., a board-certified
    neurologist.5 However, rule 166a requires affidavits to conform to section 312.011(1) of the
    government code. Hall v. Rutherford, 
    911 S.W.2d 422
    , 425 (Tex. App.—San Antonio 1995,
    writ denied). Section 312.011(1) defines an affidavit as “a statement in writing of a fact or facts
    5
    Prior to the summary judgment hearing, Dr. Schmidt objected to the qualifications of
    Dr. Lilly. The district court sustained Dr. Schmidt’s objection and excluded any testimony by
    Dr. Lilly regarding the standard of care.
    10
    signed by the party making it, sworn to before an officer authorized to administer oaths, and
    officially certified to by the officer under his seal of office.” Tex. Gov’t Code Ann. § 312.011(1)
    (West 2005). Dr. Lilly’s affidavit is unsworn. Thus, it is not proper summary judgment evidence
    and is not to be considered. See Bernsen v. Live Oak Ins. Agency, Inc., 
    52 S.W.3d 306
    , 310
    (Tex. App.—Corpus Christi 2001, no pet.) (holding that “an unsworn statement that purports to be
    an affidavit” will not support summary judgment); Coastal Cement Sand v. First Interstate Credit
    Alliance, 
    956 S.W.2d 562
    , 567 (Tex. App.—Houston [14th Dist.] 1997, pet. denied) (“Without the
    notarization or jurat, the unsworn statement is not an affidavit, and it is not proper summary
    judgment evidence.”).6
    In the absence of any controverting evidence, we hold that Dr. Schmidt’s evidence
    conclusively establishes that he did not breach the applicable standard of care. Accordingly,
    Dr. Schmidt was entitled to summary judgment on that ground.
    Proximate cause
    The evidence also conclusively establishes that Dr. Schmidt’s actions were not
    the proximate cause of Ly’s injury. The two elements of proximate cause are cause in fact and
    6
    We also note that in his brief, Ly for the first time makes allegations concerning a
    conversation between his daughter and Dr. Roberts, one of the emergency room physicians. We will
    not consider these allegations as they were not raised in the trial court and the alleged conversation
    is not competent summary judgment evidence. See City of Houston v. Clear Creek Basin Auth.,
    
    589 S.W.2d 671
    , 676 (Tex. 1979); Four Bros. Boat Works v. S & SF, Inc., 
    55 S.W.3d 12
    , 17-18
    (Tex. App.—Houston [1st Dist.] 2001, pet. denied); see also Tex. R. Civ. P. 166a(c) (“Issues not
    expressly presented to the trial court by written motion, answer or other response shall not be
    considered on appeal as grounds for reversal.”). Additionally, any statements made by Dr. Roberts
    to Ly’s daughter are inadmissible hearsay. See Tex. R. Evid. 802.
    11
    foreseeability. IHS Cedars Treatment 
    Ctr., 143 S.W.3d at 798
    . These elements cannot be satisfied
    by mere conjecture, guess, or speculation. 
    Id. at 799.
    Cause in fact is established when the act or
    omission was a substantial factor in bringing about the injuries, and without it, the harm would
    not have occurred. 
    Id. In a
    medical malpractice case, plaintiffs are required to show evidence of
    a “reasonable medical probability” or “reasonable probability” that their injuries were proximately
    caused by the negligence of one or more defendants. Park Place Hosp. v. Estate of Milo,
    
    909 S.W.2d 508
    , 511 (Tex. 1995).
    Furthermore, “[t]o raise a fact issue on causation . . . . if there are other plausible
    causes of the injury or condition that could be negated, the plaintiff must offer evidence excluding
    those causes with reasonable certainty.” Merrell Dow Pharms. v. Havner, 
    953 S.W.2d 706
    ,
    720 (Tex. 1997); see Lette v. Baptist Health Sys., 
    82 S.W.3d 600
    , 601-02 (Tex. App.—San Antonio
    2002, no pet.); Gillie v. Boulas, 
    65 S.W.3d 219
    , 224 (Tex. App.—Dallas 2001, pet. denied).
    In other words, if Schmidt’s evidence established that there were other plausible causes of
    Ly’s brain hemorrhage, or that Ly was simply “one of the unlucky patients” who was going to
    suffer a hemorrhage no matter what his treating physicians did, in order to survive summary
    judgment, Ly needed to offer controverting evidence that excluded with reasonable certainty
    Dr. Schmidt’s alternative theories of causation. See Helm v. Swan, 
    61 S.W.3d 493
    , 497-98
    (Tex. App.—San Antonio 2001, pet. denied).
    Ly alleges that he suffered a brain hemorrhage because his treating physicians
    administered anti-coagulation medicine to him based on Dr. Schmidt’s interpretation of Ly’s CT
    scan. However, Dr. Schmidt produced summary judgment evidence establishing that the hemorrhage
    12
    could have occurred whether or not Ly was prescribed anti-coagulation medicine. The defendants
    deposed Ly’s neurology expert, Michael Katz, M.D. In his deposition, Dr. Katz testified as follows:
    Q:      An ischemic stroke can transform into a hemorrhagic process, can it not?
    A:      A very well-known phenomena [sic].
    Q:      And typically it transforms into that and bleeds into generally the area that
    there were ischemic problems originally. Right, sir?
    A:      Not all the time, but in general that’s true.
    ....
    Q:      We already established a person with an ischemic stroke can develop a
    hemorrhage or hemorrhagic component to that stroke. Is that right, sir?
    A:      That is correct.
    Q:      And that can happen whether or not a patient is on anticoagulants. Right, sir?
    A:      Yes, that is true.
    The defendants also obtained similar testimony from Dr. Shalen:
    Q:      In other words, a patient can come in and have an ischemic infarct [a stroke]
    and can have studies, a CT study done which shows no evidence of
    hemorrhage or anything else that would contraindicate the giving of Heparin;
    Heparin can be given to the patient appropriately under those circumstances,
    but the patient can have this hemorrhagic transformation where the blood
    brain barrier breaks down over time and you end up with a bleed four, five,
    six days later, correct?
    A:      Okay.
    Q:      Do you agree or not?
    A:      Yes.
    13
    Q:      Okay. And there is just an unfortunate set of patients that, regardless of what
    the physicians do, that this hemorrhagic transformation is going to occur;
    would you agree with that?
    A:      I’d agree.
    Q:      And Heparin can be given or Heparin cannot be given, but the hemorrhagic
    transformation can still happen?
    A:      Correct.
    Q:      And would you agree with me that in this case, based on the evidence that we
    have and everything we know about it today, that Mr. Ly could have been one
    of those unfortunate individuals that even if he had ischemic infarct
    beginning or even if he had hemorrhagic infarct at the beginning, that this
    hemorrhagic transformation could have occurred and he would have had the
    same injury he had on the 14th, regardless of what the doctors did?
    A:      It’s possible.
    Q:      In other words, everything could have been done by the book as - under your
    opinion in this case when Mr. Ly came in, and Heparin would have been
    withheld or MRI studies would have been done, and on the basis of those
    Heparin would have been withheld and the result still could have been the
    same?
    A:      It’s possible.
    Q:      Yes, sir. And there’s no way for you to rule that out sitting here today, is
    there?
    A:      No.
    Ly offered no summary judgment evidence controverting this testimony. Thus,
    this evidence conclusively establishes that Ly’s injury plausibly could have occurred regardless
    of whether or not he was prescribed anti-coagulation medicine as a result of Dr. Schmidt’s
    interpretation of Ly’s CT scan.
    14
    Additionally, Dr. Schmidt offered summary judgment evidence indicating that even
    if the anti-coagulation medicine was the cause of Ly’s hemorrhage, one of Ly’s treating physicians
    would have prescribed the medicine regardless of what information Dr. Schmidt may have
    communicated about the results of the CT scan. The neurologist who ordered the anti-coagulation
    therapy was board-certified neurologist Dr. Sara Austin, M.D., another one of the doctors whom Ly
    sued. Dr. Austin was also deposed and testified that it was her standard practice to independently
    review the results of a patient’s CT scan prior to ordering anti-coagulation therapy:
    Q:      Okay. What was the routine practice back in March or so of 1999 . . . . for
    communicating the information and results of a CT scan?
    A:      You know, often when the emergency room doctor would call me to admit
    a patient, they would say, you know, we have a patient with a stroke. The CT
    scan shows this; you know would you come see him. That was part of it. But
    my routine practice is to go find the scan and look at it, and I do that 90 or 95
    percent of the time, look at the scan. Almost always. . . .
    Q:      So, if I understand you, in terms of getting a communication from the
    neuroradiologist, you rarely talked directly to the neuroradiologist?
    A:      Yeah.
    ....
    Q:      All right. And so take it one step further than that. . . . Is it your standard
    practice 90 to 95 percent of the time to personally review a patient’s head CT
    scans before you would prescribe Heparin for that patient?
    A:      Yes.
    Q:      And do you have any reason to believe that you deviated from your standard
    practice in Mr. Ly’s case on March 8, 1999?
    A:      No.
    15
    Q:      Okay. And kind of as a background, are you qualified to review head CT
    scans? Is that something you’ve had training and experience doing?
    A:      Yes.
    Dr. Austin went on to testify that although it was her standard practice to do so, she
    could not recall if she had examined Dr. Schmidt’s report prior to ordering the anti-coagulation
    therapy. After reviewing the report during the deposition, Dr. Austin acknowledged that Dr. Schmidt
    had recommended follow-up MRI studies. Dr. Austin further testified that she would have ordered
    anti-coagulation therapy regardless of Dr. Schmidt’s recommendation regarding an MRI:
    Q:      Okay. So do you understand this [Dr. Schmidt’s report] to suggest that an
    MRI would be helpful?
    A:      Dr. Schmidt thinks it would be helpful, yes.
    ....
    Q:      Going back to the MRI, the recommendation or the suggestion, I suppose, of
    an MRI in Dr. Schmidt’s dictation on Page 70 of these Seton records, if you
    had known that Dr. Schmidt suggested an MRI, would that have changed at
    all your decision to go forward with Heparin therapy?
    A:      No.
    Assuming that the anti-coagulation therapy was the cause of Ly’s hemorrhage, the
    above testimony, which was uncontroverted, establishes that Dr. Austin’s independent decision to
    order anti-coagulation therapy was a superseding cause of Ly’s injury. See Phan Son Van v. Pena,
    
    990 S.W.2d 751
    , 754 (Tex. 1999) (listing factors that are to be considered in determining whether
    16
    intervening force rises to level of superseding cause, including “the fact that the intervening force
    is operating independently of any situation created by the actor’s negligence”).
    Finally, Dr. Schmidt provided summary judgment evidence indicating that, in his
    expert opinion, the hemorrhage that Ly suffered was not related to and/or proximately caused by the
    stroke for which Ly was treated. Instead, the hemorrhage may have been the result of a brain injury
    suffered two years prior to Ly’s stroke. In his affidavit, Dr. Schmidt averred:
    In reviewing the head CT scan of Charles Ly dated March 8, 1999, a crescent-shaped
    area of high density was identified in the putamen of the basal ganglia. . . .
    Since the beginning of this litigation, I have had the opportunity to review several
    previous radiological studies performed upon Charles Ly. Specifically, I have
    reviewed the films and report of a head CT scan performed upon Charles Ly at
    Brackenridge Hospital on January 5, 1997. The report from this study indicated “[a]
    streak of increased attenuation is seen along the right lateral margin of the basal
    ganglia that could be parenchymal hemorrhage from a shearing type injury. A thick
    streak of calcium could also produce this appearance.” This “streak” of increased
    density brain matter reported in January 1997 is located in the exact same portion of
    the brain in which the high density area was noted on Charles Ly’s March 8, 1999
    head CT scan.
    ....
    Based upon the age of the crescent-shaped high density area of calcification, as well
    as its far-removed location in the putamen of the patient’s basal ganglia, it is my
    expert opinion that Charles Ly’s hemorrhage in the right front intraparenchymal
    region of his brain on March 14, 1999 was not related to and / or not proximately
    caused by the aforementioned crescent-shaped high density area of calcification.
    Specifically, the high density area in the patient’s basal ganglia was still present and
    not contiguous to the area of hemorrhage on March 14, 1999. This would lead me
    to conclude the crescent-shaped area of high density was not indeed a hemorrhage,
    and was not a proximate cause of Charles Ly’s eventual hemorrhage on March 14,
    1999.
    17
    This evidence establishes a plausible alternative cause of Ly’s hemorrhage, and
    although Ly disputed some of the conclusions in Dr. Schmidt’s affidavit, Ly did not provide any
    summary judgment evidence controverting this alternative theory of causation.7
    For these reasons, we hold that the summary judgment evidence conclusively negates
    the essential element of proximate cause. Therefore, Dr. Schmidt was also entitled to summary
    judgment on that ground.
    CONCLUSION
    We affirm the judgment of the district court.
    ____________________________________________
    Bob Pemberton, Justice
    Before Justices Patterson, Pemberton and Waldrop
    Affirmed
    Filed: August 28, 2007
    7
    In fact, the only evidence concerning proximate cause that Ly provided in his response to
    Dr. Schmidt’s motion for summary judgment was the statement of Dr. Ralph Lilly, who concluded
    that “the initial and continued application of [the anti-coagulation medicine] caused the extension
    of a pre-existing hemorrhagic infarct.” However, as we discussed earlier, Dr. Lilly’s affidavit
    is unsworn and is not competent summary judgment evidence. See Coastal Cement Sand v. First
    Interstate Credit Alliance, 
    956 S.W.2d 562
    , 567 (Tex. App.—Houston [14th Dist.] 1997,
    pet. denied).
    18