Anyone over 20 years old with full capacity can be assigned as a medical surrogate agent when both agreed to and signed in written form. However, when you are the beneficiary for the patient’s organ, it is not legal for you to be patient’s medical surrogate agent.
The medical surrogate agent you appoint will represent you to make every medical decision, and it is very important that you appoint a person who both understands your thoughts and values of life and is physically close to you so as to stay by your side when needed. Your relationship with your medical surrogate agent will need to be managed as well. For instance, you can review whether your medical surrogate agent still has your trust and share the same values with you or not, or you can always terminate your proxy at any time.