An advance directive is a legal document that allows individuals to outline their preferences for medical treatment in case they become unable to communicate their wishes. This document can specify the types of medical interventions a person does or does not want, such as life support or resuscitation efforts. It helps ensure that healthcare providers and family members understand the individual's desires regarding end-of-life care. There are two main types of advance directives: a living will and a durable power of attorney for healthcare. A living will details specific medical treatments a person wishes to receive or avoid, while a durable power of attorney designates someone to make healthcare decisions on their behalf. Both documents are important for ensuring that a person's healthcare preferences are respected.