Advance Directives

An 85 year old man who has diabetes, COPD, and heart failure was having difficulty breathing and his family called 911 for assessment. The EMT's determined that he must be taken to the Emergency Department for treatment. During transportation, he became unconscious and required intubation. When his family arrived in the ED, they explained that their father had an advanced directive that stated that he did not want to be intubated. They were confused and upset. The nurse explains to the family that...

The two forms of advance directives are

A patient just got admitted to the oncology unit and the nurse asks the patient if he has advanced directives. He indicates he does. What is the nurses responsibility in this situation?