Organ Donor - Healthcare Information ← Knowledge Base Will my decision to donate affect the quality of my medical care? What is an advance directive for health care choices? Do I have to have an advance directive for health care choices to be a donor? I have an advance directive that includes organ donation. Do I need to register in Missouri's Organ and Tissue Donor Registry? I have a person serving as my health care proxy with a signed power of attorney. Can this person approve donation for me? If I am a registered donor and I also have an Out-of-Hospital Do Not Resuscitate (DNR) Order, how will emergency medical staff handle the situation? What is brain death? What is cardiac death? What are tissue transplants? What is the cornea? What is corneal blindness? What is a corneal transplant? When are organs recovered? What is a living related kidney donor? What is a living unrelated kidney donor? What is an altruistic kidney donor? Does a chronic health problem keep me from being a donor? What medical conditions prohibit donation? Can I be an organ, eye and tissue donor if I use medical marijuana? Can I receive an organ transplant if I use medical marijuana? If I would like to donate a kidney to someone I know who is in need, how can I be tested to see if I am a match?