The Medical Directive records the medical treatments you wish to have or not have should you become unable to express your wishes.

	Record your wishes regarding various types of medical treatments, such as resuscitation and artificial feedings
	Appoint a proxy, someone to make medical decisions on your behalf should you become unable to make them on your own
	Record your wishes regarding donating your organs for transplantation

Only if you become mentally incompetent and unable to make medical decisions on your own.