Can qualified expert testimony establish medical causation on summary judgment? Kerby v. Moab Valley Healthcare Explained

In Kerby v. Moab Valley Healthcare, the Utah Court of Appeals addressed whether equivocal expert testimony can establish medical causation as a matter of law on summary judgment. The case arose from a wrongful death claim following a patient’s discharge from Allen Memorial Hospital while still under the influence of medications.

Background and Facts

The patient underwent medical procedures at Allen Memorial Hospital and received multiple medications including morphine, Valium, and promethazine. Despite being observed as drowsy and incoherent, she was discharged and found dead at home hours later. The medical examiner attributed death to combined effects of asthma, chronic bronchitis, drug toxicity, and obesity. Plaintiffs filed suit alleging the hospital breached the standard of care by discharging a pharmaceutically inebriated patient prematurely.

Key Legal Issues

The central issue was whether plaintiffs could establish proximate cause as a matter of law through the testimony of defendant’s toxicologist expert. Plaintiffs moved for partial summary judgment on causation, arguing the expert’s testimony established that the patient would more likely have survived if kept in the hospital overnight.

Court’s Analysis and Holding

The court examined the toxicologist’s deposition testimony in detail. While the expert stated it was “more likely that she would have survived in the hospital,” he repeatedly qualified this opinion as being “outside the scope of [his] expertise” and acknowledged he “don’t know the percentages” and “can’t answer that” regarding survival odds. The court held that such qualified and equivocal testimony was insufficient to establish causation as a matter of law, noting that “causation cannot be resolved as a matter of law” because it is a “highly fact-sensitive element.”

Practice Implications

This decision reinforces that medical malpractice causation requires definitive expert testimony to support summary judgment. Practitioners should ensure expert witnesses provide unqualified opinions within their expertise when seeking judgment as a matter of law. The court’s analysis also demonstrates the difficulty of disposing of causation issues on summary judgment, particularly when expert testimony contains qualifications or expressions of uncertainty about key causal relationships.