1) A patient was admitted to the hospital with chronic obstructive pulmonary disease. His PO2 was 55 and PCO2 was 65. A new resident orders 54% oxygen via the venturi mask. One hour later, after the oxygen was placed, the nurse finds the patient with no respiration or pulse. She calls for a Code Blue and begins cardiopulmonary resuscitation (CPR). Explain why the patient stopped breathing. 2) After a long scuba diving session on a Caribbean reef, Carl boards a plane to Dallas. He begins to feel pain in his elbow on the flight back to Dallas. What is happening to him? 3 While dining out in a restaurant a man suddenly chokes on a piece of meat. The waitress is also a student nurse and comes to the man’s aid. She asks him if he can talk.The man responds by shaking his head no and grabbing at his neck. What is the significance of the man’s inability to talk?