STEELE, Justice:
In this appeal, consolidated with Eskin v. Carden, 842 A.2d 1222 (Del.Supr.2004), we again address the nature and scope of the admissibility of biomechanical expert testimony related to a motor vehicle accident alleged to have caused personal injuries to a particular plaintiff.
We find that the trial judge did not abuse her discretion, either when she barred the biomechanical expert testimony nor when she allowed Plaintiff/Appellee's medical experts to testify. We, therefore, affirm her rulings on the proffered evidence. We further find that the record supports her conclusion that there was no genuine issue of material fact regarding the existence or cause of a soft-tissue injury, even when the evidence is examined in the light most favorable to the Defendant/Appellant. Therefore, the trial judge correctly removed this issue from among those to be considered by the jury. Accordingly, we affirm the judgment of the Superior Court.
On May 8, 1998, Defendant/Appellant Judith Mason rear-ended Plaintiff/Appellee Maria Rizzi's car. The accident occurred while both were stopped at a red light and Mason's foot came off the brake pedal. There was no damage to either vehicle.
At the time of the accident, Rizzi had a pre-existing medical condition dating back to 1990 that included a disc herniation and degenerative changes to her cervical spine. In April 2001, almost three years after the accident, Dr. Bruce Rudin operated on Rizzi's spine.
Rizzi brought suit, and the trial took place beginning on March 11, 2002. Mason admitted liability before trial, leaving the issues of proximate cause and damages for the jury at trial. Rizzi claimed two types of injury — a soft-tissue injury to her neck and back evidenced by pain and muscle spasm, and pain associated with trauma requiring surgery on her spine in 2001. On March 13, 2002 the jury returned a verdict in favor of Rizzi in the amount of $340,680.29. Mason filed an unsuccessful Motion for a New Trial or Remittitur, and now appeals the trial judge's evidentiary rulings and denial of a new trial.
Before trial, Rizzi moved to exclude Mason's proffered biomechanical expert testimony. Mason's expert would have testified that:
The trial judge excluded the testimony at trial and then expanded upon her bases for doing so in her Post-trial Memorandum Opinion.
Accordingly, the trial judge identified two reasons that supported her decision to exclude the biomechanical expert's testimony:
(1) The proffered testimony was "irrelevant, highly prejudicial and should be excluded" because Defendant's medical expert did not testify about the forces involved in the accident and whether they could or could not have caused injuries as severe as those allegedly suffered by Rizzi;
(2) Defendant's biomechanical expert proffered an opinion based on studies that analyzed the effect of impact forces on normal spines, not on previously injured spines, like Rizzi's. That factor alone, the trial judge concluded, would result in juror confusion, even if the proffer had some "relevance and probative value." The trial judge explained:
The trial judge's reasoning and ruling gives us an opportunity to elaborate further our views on biomechanical expert opinion discussed in the companion case of Eskin v. Carden.
First, where there is an objection, we reaffirm the necessity for our trial judges to examine carefully the purpose for which a biomechanical expert opinion is offered in a particular case. Like many difficult issues in the law, the question of whether biomechanical expert testimony should be admitted is highly contextual. As we stated
In this context, we reject the notion, suggested by the term "medical causation," that biomechanical expert opinion can never be admitted unless the opinion is seconded by or relied upon by a physician in forming that physician's opinion about whether an accident caused physical injury to a person. There may well be circumstances where a biomechanical expert's views will be both relevant and reliable. For example, a patient tells a physician: "My head struck the dash during the accident." The physician concludes that the statement, in part, confirms the existence of or helps explain the severity of the patient's head injury. A trial judge might find relevant and reliable a biomechanical expert's view that no person meeting the plaintiff's physical description could have struck the dash with his or her head, given the forces generated by the accident. The biomechanical expert's opinion, thus, may reliably establish the improbability of a factual assumption upon which a medical doctor relied in order to form an opinion about the causation or severity of an injury. The biomechanical expert opinion would be relevant because it contradicts an essential fact actually relied upon by a medical expert accepting the credibility of a patient's oral history.
The trial judge would, of course, in determining the reliability of the opinion, consider the error rate of the supporting tests. If the statistical margin of error was within reason, the trial judge could allow the testimony because its trustworthiness had been established through validated testing, and the particular issue on which it had a bearing could be focused in a way unlikely to mislead or confuse the jury. The opinion could aid the jury in determining whether it was more likely than not that the plaintiff's head could have struck the dash given the forces at work in the accident. If believed, the expert's opinion would address whether the jury should rely upon the physician's expert opinion which was based, in part, on the assumption that the plaintiff's head did strike the dash. No juror would be in danger of drawing an inference beyond the reliable limits of the purpose for which the opinion was offered — namely, that this person did fit into a measurable category of average persons reflected in the biomechanical testing reported in "the literature." Based on such expert testimony, the jury could reasonably conclude that the plaintiff's head probably did not, just like the average person's probably would not, strike the dash.
There also can be little doubt that a case will arise where no medical history or contemporaneous examination reveals a plaintiff's unique susceptibility to injury. Medical history, under these circumstances, would have no bearing upon the biomechanical expert opinion's reliability, provided that a reasonable margin of error in testing average people had been established. The plaintiff would fit into a statistically measurable category. The trial judge could accept studies with error rates within an acceptable marginal range and conclude that they validate the reliability of the opinion, since it applies to persons having the same general characteristics as the plaintiff. Since the opinion would be clearly relevant under these circumstances, no rational 403 analysis would likely result in a conclusion that the jury would be misled or confused about the
Second, to conclude that the trial judge's role as the gatekeeper for scientific or technical expert opinion testimony is fulfilled by concluding, without more, that an individual who is properly credentialed in a recognized field of expertise will present a reliable expert opinion, is entirely too facile. The U.S. Circuit Court for the Third Circuit has highlighted an equally important inquiry:
Before cross-examination attacks the persuasiveness of expert opinion, the trial judge is obliged to satisfy herself that the expert opinion testimony is relevant, reliable, validated, and, therefore, trustworthy. Then, and only then, can it be juxtaposed against other relevant, reliable, validated, trustworthy expert opinion for the purpose of the parties contesting, and then the jury evaluating, its persuasiveness.
The current controversy over biomechanical expertise and its relationship to medical expertise tends to blur the focus upon the trial-judge-as-gatekeeper. In an appropriate case, expertise in each field might assist the jury in resolving a fact in controversy by allowing the jury to weigh what the expertise of each field brings to the table in the form of a trustworthy opinion. The opinion of neither field is necessarily dependent upon the other. The essential inquiry, given the particular facts of the case, should be whether the expert opinion is sufficiently reliable, as well as relevant, so that the trial judge can fairly conclude that it is trustworthy. Will the opinion actually assist the trier of fact in fairly resolving the underlying factual dispute, or will it confuse the issue by shifting the fact finders' attention from the particular to the universal?
Here, as in Eskin, we again confront biomechanical expert opinion that does not reliably support its proponent's argument. Absent a showing that the biomechanical literature demonstrated its applicability to a person with Rizzi's medical history, the proffer failed to establish the: ... "[an]other aspect of relevancy ... whether [it] is sufficiently tied to the facts of the case that it will aid the jury in resolving a factual dispute."
The trial judge correctly concluded that the biomechanical expert's supporting studies failed to account for the effect of the forces at impact on a spine which had earlier undergone disc surgery. Allowing the jury to consider the biomechanical expert's generalized opinion could easily have misled the jurors to believe that this "one-size-fits-all" biomechanical expert opinion could be relied upon to assist them in a fair and objective consideration of the cause or severity of the injury to Rizzi. In this case, the proffered biomechanical expert testimony would have misled the jury or confused the issues they were being asked to resolve.
In summary, just as Davis v. Maute
Mason further contends that the trial judge erred by granting partial judgment as a matter of law, thereby removing from the jury the issue of whether the accident caused Rizzi's soft-tissue injury. We review entry of judgment as a matter of law to determine whether the evidence and all reasonable inferences drawn therefrom raise an issue of material fact when viewed in a light most favorable to the party against whom the judgment is entered.
After the close of her case-in-chief, Plaintiff moved for a Directed Verdict under Superior Court Rule 50(a).
The record confirms the trial judge's conclusion that the record supports no inference other than the conclusion that the accident caused Rizzi's soft-tissue injuries. Despite the general deference of our courts to the findings of a jury, this Court has held that a jury, as a matter of law, must find some quantum of damages where uncontradicted medical testimony establishes a causal link between an accident and the injuries sustained.
Mason suggests that the trial judge improperly relied on Amalfitano v. Baker
Accordingly, Mason's argument finds no support in the record and is patently without merit.
Finally, we address Mason's contention that the trial judge's ruling was improper because Plaintiff's motion sought only a ruling on the issue of the causation of the surgical injury. Our reading of the motion does not support that assertion. The trial judge properly understood that the parties were disputing two separate and distinct injuries. After the close of Mason's case, it became clear that the only injury genuinely disputed was that which led to the subsequent back surgery. The trial judge correctly noted that: "Had the Court simply instructed the jury that the collision caused injury to the Plaintiff, the jury may have improperly concluded that they were required to find that the collision caused both the soft-tissue injury and the surgical injury."
Here, uncontradicted medical evidence confirmed objective findings supporting Rizzi's soft-tissue injuries. Mason's own medical expert concluded that the accident caused Rizzi's soft-tissue injuries. The trial judge correctly ruled that even when viewed in a light most favorable to Mason, the evidence and all reasonable inferences drawn from it raised no genuine issue of material fact regarding the existence and cause of Plaintiff's soft-tissue injury.
Our system of justice relies on trial judges to fashion careful and thorough legal rulings that take into account both the complicated nature of personal injury disputes,
Mason lastly argues that the trial judge erred by denying a Motion in limine that sought to exclude the expert testimony of Drs. Rosenfeld and Rudin. Alternatively, Mason claims the trial judge erred by not granting a requested curative jury instruction.
Specifically, Mason contends that a letter dated April 3, 1990, addressed to Plaintiff's attorney, and allegedly signed by a Dr. Bose, was not produced in a timely fashion in response to properly served interrogatories. Dr. Bose, who performed Rizzi's pre-accident back surgery, opines in that letter that Rizzi "may" require future surgery. Mason claims that she was unfairly prejudiced when Rizzi's counsel failed to produce the letter before the trial so that it could be used to cross-examine Drs. Rosenfeld and Rudin's in their trial depositions. Mason insists that the Court should have excluded the trial deposition testimony of Dr. Rosenfeld and Dr. Rudin altogether because of this alleged discovery violation. Alternatively, Mason believes that the discovery violation could have been appropriately addressed by an instruction advising the jury that they could draw an adverse inference against Rizzi for failing to present critical evidence that raised a question about whether the accident itself necessitated her 2001 surgery or whether Rizzi would have needed the surgery in any event for reasons unrelated to the accident.
We review a trial judge's refusal to bar evidence or to provide a curative instruction for abuse of discretion.
The trial judge found no evidence to support a conclusion that Rizzi's counsel intentionally misled Mason's counsel by failing to produce the Bose letter before the trial depositions of Rizzi's medical experts. The trial judge set forth a lengthy explanation of the discovery "deficiency":
As found by the trial judge, Mason could have cured any prejudice caused by Rizzi's counsel's failure to find and forward the Bose letter before the trial depositions of Drs. Rosenfeld and Rudin, by taking the opportunity to review Rizzi's counsel's complete medical file before those depositions.
To grant Mason's Motion in limine, which sought to exclude altogether the expert testimony of Drs. Rosenfeld and Rudin, would have been an extreme, and therefore, unlikely remedy in any event. The trial judge attempted, quite properly, to weigh the harm to both parties. She mitigated any prejudice Mason may have suffered at trial because of the late receipt of the Bose letter, as follows:
Thus, the trial judge's remedy was to give Mason her "best shot" at maximizing the impact of the Bose statement without the risk that Drs. Rosenfeld and Rudin may have discredited Mason's interpretation of the Bose letter had they been confronted with it. Given that remedy, we conclude that Mason was not unfairly prejudiced by not having the Bose letter available to her at the time of the trial depositions. Accordingly, the trial judge acted appropriately within her discretion in denying the motion in limine.
Finally, because there is no support in the record for the contention that Plaintiff's counsel intentionally ignored Mason's discovery requests, the trial judge acted appropriately within her discretion by denying the requested curative instruction.
For the foregoing reasons, the judgment of the Superior Court is Affirmed.
(1) If during a trial by jury a party has been fully heard on an issue and there is no legally sufficient evidentiary basis for a reasonable jury to find for that party on that issue, the Court may determine the issue against the party and may grant a motion for judgment as a matter of law against that party with respect to a claim or defense that cannot under the controlling law be maintained or defeated without a favorable finding on that issue.
(2) Motions for judgment as a matter of law may be made at any time before submission of the case to the jury. Such a motion shall specify the judgment sought and the law and the facts on which the moving party is entitled to the judgment.