A medical malpractice attorney will need to review the facts of your case to establish where standard of care was breached. In a courtroom, a more concrete definition of standard of care is typically given by an expert medical witness.
Qualified expert witnesses provide testimony to help determine the standard of care for any given medical malpractice case. Attorneys on both sides can call witnesses to give examples of what an average physician in the same field and similar circumstances would do, helping to establish the standard of care for that case.