Background
Peggy Stith underwent neck surgery and was transferred to Bella Vita Health & Rehabilitation Center for post-operative care. While nursing staff transferred her to a bed, her head struck a wall. The staff examined her and found no visible injury but did not contact her physician or perform neurological checks. They administered pain medication and allowed her to sleep. The next morning, staff found Stith unresponsive; she was transported to a hospital and diagnosed with a subdural hematoma (brain bleed). She underwent emergency surgery and survived but suffered permanent brain damage.
Stith sued Bella Vita for medical malpractice, alleging the facility breached the standard of care by failing to conduct neurological checks and notify her physician after the head injury. At trial, Stith’s expert witness, nurse Eleanor Tache, testified that the failure to perform neurological checks violated the applicable standard of care. Stith also presented expert testimony that her subdural hematoma was an acute event, not a pre-existing condition. However, during her case-in-chief, Stith presented no expert testimony establishing that the failure to conduct neurological checks caused her subdural hematoma or that she would have had a better outcome if proper checks had been performed.
After Stith rested her case-in-chief, Bella Vita moved for judgment as a matter of law (JMOL) under Arizona Rule of Civil Procedure 50(a), arguing insufficient evidence of causation. The trial court denied the motion. During rebuttal, after Bella Vita presented its defense, Stith recalled expert Dr. Woodcock, who testified that neurological checks were “designed specifically” to detect subdural hematoma symptoms and that earlier detection would have resulted in a better neurological outcome. The jury returned a verdict for Stith, awarding $10 million in damages. Bella Vita renewed its JMOL motion post-verdict, which was also denied.
The Court’s Holding
The Arizona Court of Appeals reversed the trial court and granted JMOL in favor of Bella Vita. The court established two critical procedural rulings. First, the court held that the denial of a Rule 50(a) JMOL motion is reviewable on appeal when preserved by a post-verdict Rule 50(b) motion, rejecting Stith’s argument that such denials are unreviewable under Unitherm Food Systems, Inc. v. Swift-Eckrich, Inc., 546 U.S. 394 (2006). The court reasoned that while Unitherm held that failure to renew a Rule 50(a) motion via Rule 50(b) precludes appellate review, post-Unitherm federal courts regularly review Rule 50(a) denials when parties properly preserve the issue through a Rule 50(b) motion.
Second, the court held that when reviewing a denied Rule 50(a) motion, appellate courts are limited to evidence presented at the time the plaintiff rested her case-in-chief—not evidence presented later in rebuttal. The court concluded a plaintiff is “fully heard” for Rule 50(a) purposes upon resting her case-in-chief, analogizing to federal practice and the principle that a plaintiff must establish all elements of her prima facie case during case-in-chief. The court rejected the dissent’s argument that “fully heard” means fully heard after all evidence, including rebuttal.
Applying Arizona law on medical malpractice causation, the court reaffirmed that juries cannot infer causation in medical malpractice cases without expert testimony when the cause is disputed and not obvious to ordinary persons. The court cited Sampson v. Surgery Center of Peoria, LLC, 251 Ariz. 308 (2021), holding that a plaintiff must present expert testimony establishing a causal connection between the defendant’s breach and the injury. Here, Stith’s experts testified only about breach of the standard of care; they did not testify during case-in-chief that failure to conduct neurological checks caused her subdural hematoma or would have altered her outcome. This omission was fatal. Because Stith failed to establish the essential causation element by the close of her case-in-chief, no reasonable jury had a legally sufficient evidentiary basis to find for her. Bella Vita was entitled to JMOL.
Key Takeaways
- Rule 50(a) JMOL motions are appealable when properly preserved via Rule 50(b), and appellate review is limited to evidence at the time the plaintiff rested her case-in-chief.
- In medical malpractice cases, expert testimony on causation is mandatory—a jury cannot infer causation from breach of standard of care alone when the cause is not obvious.
- A plaintiff bears the burden of proving all prima facie elements, including causation, during her case-in-chief and cannot rely on rebuttal to supply missing essential elements.
- A plaintiff who fails to present causation evidence by the close of her case-in-chief is vulnerable to JMOL, regardless of evidence presented in rebuttal.
Why It Matters
This decision significantly impacts medical malpractice litigation in Arizona. It clarifies that healthcare defendants can move for JMOL mid-trial after the plaintiff rests, and Arizona courts will review such motions on appeal using de novo review. More critically, it reinforces that plaintiffs cannot cure deficient causation evidence through rebuttal testimony—causation must be adequately established during case-in-chief through competent expert testimony. This places substantial pressure on plaintiffs to fully develop their causation theory before resting, as adding causation testimony later will not save an otherwise deficient verdict.
The decision also has procedural significance for trial management. It establishes that while Rule 50(a) uses permissive language (“may” grant JMOL), a trial court commits legal error by denying a JMOL motion when the plaintiff has failed to establish an essential element. This ruling may encourage more mid-trial motions by defense counsel and heighten the need for careful case planning by plaintiffs’ counsel. The dissent’s concern—that reversing a jury verdict based on evidence limitations at an earlier trial stage, rather than on the full record, produces harsh results—reflects a genuine tension in the law, but the majority’s approach prioritizes procedural fairness and the principle that plaintiffs must carry their burden at the right time in trial.