When is expert medical testimony required to establish causation in personal injury cases? Beard v. K-Mart Explained

The Utah Court of Appeals decision in Beard v. K-Mart clarifies when expert medical testimony is required to establish causation between an accident and subsequent medical treatment, particularly complex surgical procedures.

Background and Facts

Darlene Beard was struck in the head by a K-Mart employee’s elbow while he attempted to start a lawnmower. Following the accident, Beard experienced pain in her head, neck, wrists, knee, and ankle. She subsequently underwent three surgeries on her neck and wrists performed by Dr. Robert Peterson. At trial, Beard testified that her neck and wrist problems began when she was struck at K-Mart. Dr. Peterson testified there was a “chronologic association” between the incident and the onset of symptoms, but crucially stated he could not say to a degree of reasonable medical probability that the K-Mart accident caused the need for either the neck or wrist surgeries.

Key Legal Issues

The central issue was whether Beard presented sufficient evidence to permit the jury to find that her neck and wrist surgeries were the proximate result of the injuries she suffered at K-Mart. K-Mart argued that expert medical testimony establishing causation was required, while Beard contended that her testimony and general medical testimony about the chronological relationship was sufficient.

Court’s Analysis and Holding

The court distinguished between injuries within common experience and complex medical determinations. While lay testimony can establish that an accident caused immediate pain and injury, determining whether such injuries necessitated complex neurological surgery requires expert medical opinion. The court emphasized that expert medical testimony merely establishing a chronological relationship between an accident and symptoms is insufficient—the testimony must establish that the treatment was probably necessitated by the accident. The court reversed and remanded for a new trial, finding that without proper expert medical testimony linking the injury to the necessity of surgery, the jury would be impermissibly speculating.

Practice Implications

This decision reinforces the importance of securing strong expert medical testimony in personal injury cases involving complex medical treatment. Practitioners must ensure their medical experts can testify that treatment was probably caused by the defendant’s negligence, not merely that there was a temporal relationship. The decision also provides defendants with a roadmap for challenging weak causation evidence through directed verdict motions when expert testimony falls short of establishing probable causation.