Philadelphia, PA personal injury attorney Leon Aussprung M.D., ESQ. talks about the biggest challenges faced in handling medical malpractice cases. He notes that one of the most challenging aspects of medical malpractice cases is proving causation. It is not enough to show that a hospital, doctor, or nurse acted negligently; the plaintiff must demonstrate that the negligence directly caused the injury, or that the injury would not have occurred but for the mistake. Establishing this requires expert testimony from professionals in the relevant fields—such as neurology, rehabilitation, infectious disease, emergency medicine, or cardiology—depending on the circumstances. For example, an infectious disease expert may be needed to show that earlier diagnosis and treatment with the appropriate antibiotic would have prevented a complication. Similarly, in an emergency medicine or cardiology case, expert testimony may establish that timely intervention—such as administering aspirin or performing an EKG—would have changed the outcome. Proving that the injury or complication could have been avoided is often the most difficult part of a medical malpractice claim.