A medical power of attorney is a document in which an individual designates another individual who may make medical decisions for him or her in the event of a medical emergency. Such a document is an important part of an estate plan. The individual designated to serve in that capacity should be someone familiar with your opinions on medical issues and an individual who feels that they will be able to be make decisions in accordance with your wishes. It is important to talk with the person you are considering making your medical power of attorney prior to doing so, as that individual will be vested with a lot of power and responsibility. When planned accordingly, designating a medical power of attorney can assist in making sure that your medical decisions are carried out.