A man finds his wife unconscious and unresponsive after she has not eaten for 24 hours. What should you do first?

In a scenario where a person is found unconscious and unresponsive, the primary concern is ensuring the patient's airway is open and that they are breathing adequately. Opening and maintaining the airway allows for the prevention of choking and ensures that if the patient is capable of breathing, they can do so without obstruction.

In this situation, the man should first assess if his wife is breathing and if her airway is clear. If she is not breathing or her airway is obstructed, immediate intervention is required to establish proper ventilation. This step is vital to preserve brain function and prevent further injury due to lack of oxygen.

While administering oral glucose could be useful if the patient is hypoglycemic, she is unconscious and cannot safely swallow. Administering oxygen may be indicated later once the airway is secured, and assessing for a medical identification tag is an important step, but it is secondary to ensuring the patient can breathe effectively. Therefore, the priority should always be the airway and breathing in unconscious patients.