ATL S10 2019/2022 POST-TEST with complete solutions

A 24-year-old male pedestrian, struck by an automobile, is admitted to the emergency department 1 hour after injury. His blood pressure is 80/60 mmHg, heart rate 140 beats per minute and respiratory rate is 36 per minute. He is lethargic. Oxygen is delivered via face mask, and two large-caliber IVs are initiated. Arterial blood gases are obtained. His PaO2 is 118 mmHg (15.7 kPa), PaCO2 is 30 mmHg (4.0 kPa), and pH is7.21. The treatment of his acid-base disorder is best accomplished by: a. Hyperventilation b. Restoration of normal perfusion c. Initiation of low-dose dopamine d. Administration of sodium bicarbonate e. Initiation of phenylepinephrine infusion 2. The highest priority in managing a patient whose injuries include closed extremity fractures is: a. Assesing limb perfusion b. Preventing necrosis of the skin c. Decompressing compartment syndrome d. Addressing respiratory insufficiency Identifying crush syndrome