Ed, a 21-year-old Olympic gold medalist, has ruptured his ACL and surgery is offered as treatment. The surgeon explains to Ed that the surgery requires his consent. Consent is grounded in principles of patient autonomy, beneficence, non-maleficence, and justice. For consent to be valid, it must be informed - the patient must understand the nature of the procedure, risks involved, and alternatives. The recent Montgomery ruling established that doctors must take reasonable care to ensure patients understand any material risks or reasonable alternatives.