You can actually designate the person you want to step in on your behalf, to make medical decisions; in Michigan this person is called a "Patient Advocate".
If prepared and executed properly, under Michigan's "Estate & Protected Individuals Code", a "Patient Advocate Designation" (or PAD) can be effective to carry out your wishes, and can spare your family and loved ones a lot of unnecessary heartache. Talk to Richmond/St. Clair County attorney Jon Frank about preparing a "Patient Advocate Designation" to make sure your medical care wishes are carried out, whatever your condition.
On a related issue, Michigan statutory law has provided for the scenario, in which the patient can establish and execute a "Do Not Resuscitate Order" (DNR), instructing health care professionals not to attempt life-resuscitating efforts. For obvious reasons, a person covered by such an order must have documentation of a DNR Order (often, by means of a hospital-type bracelet worn by the patient, with certain information made visible to anyone looking at it).
Again, because of the sensitivity of the issue, DNR Orders must be executed in strict compliance with Michigan law. We will be glad to assist you with anyquestions you might have about preparing a Patient Advocate Designation, or DNR Order.