During a medical malpractice trial concerning an ulnar nerve injury sustained during orthopedic surgery, the defendants objected to the plaintiffs' expert orthopedic surgeon testifying on causation and standard of care issues not expressly stated in his written reports.
The court ruled that under Rule 53.03, an expert cannot testify on matters that open up a new field not mentioned in their report, nor can the court be left to infer opinions.
The expert was precluded from offering opinions on causation and the standard of care for the initial consultation, as these were not clearly articulated in his reports.
