Phrenic nerve injury expert witnesses practice in a variety of fields, including thoracic surgery, neurology, pulmonology, anesthesiology, and critical care. Some of the most common specialties include nerve conduction studies, diaphragm paralysis, ventilator dependence, and post-surgical complications. They can opine on the effects of phrenic nerve damage on breathing capacity, disability, causation, prognosis, and standard of care.