The nurse notes that an advance directive is on a patient's medical record. Which statement represents the best description of an advance directive guideline the nurse will follow? [23]
1. A living will allows an appointed person to make health care decisions when the patient is in an incapacitated state.
2. A living will is invoked only when the patient has a terminal condition or is in a persistent vegetative state.
3. The patient can not make changes in the advance directive once admitted to the hospital.
4. A durable power of attorney for health care is invoked only when the patient has a terminal condition or is in a persistent vegetative state.