You have been called to a residence for a patient with alter…

You have been called to a residence for a patient with altered mental status and shortness of breath. On scene, an Emergency Medical Responder meets you and states that he believes the patient had a stroke and is unresponsive. As you enter the room, you see the patient lying in bed with snoring respirations. Oxygen at 15 liters per minute has been applied. Your immediate action when you reach the patient’s side would be to: