"a young adult is brought to the emergency department with his fiancée after being involved in a serious motor vehicle accident. his glasgow coma scale score is 7, and he demonstrates evidence of decorticate posturing. which action is appropriate for obtaining permission to place a catheter for intracranial pressure (icp) monitoring? "

Asking authorization to the patient's fiancee.

Explanation:

In an emergency, if the patient is unconscious. The closest relative is the one that will be in charge of the decisions in regards to the patient's well-being. In case that there aren't any relatives, decisions will be made by the doctor in charge of the case or the person who is in charge of the ER-department.