Case law relating to surgical consent is fairly well settled. A review of the numerous decisions on this question can be summed up with a general statement: If the patient freely consults the physician, understands the operation contemplated, enters the hospital, and submits to the operation, consent is implied. This consent to a surgical operation is a privilege that the patient extends to the surgeon to commit trespass to the person.
Carl E. Wasmuth, Consent to Surgical Procedures, 6 Clev.-Marshall L. Rev. 235 (1957)