Five hours after intramuscular administration of morphine 15 mg to a healthy 80-kg man, residual effects are best demonstrated by measuring the
(A) resting tidal volume
(B) resting PaC02
(C) functional residual capacity
(D) ventilatory response to rebreathing
(E) alveolar ventilation
D
Which of the following is the most likely cause of rapid oxygen desaturation during laryngoscopy In a pregnant woman?
(A) Airway edema
(B) Anemia
(C) Decreased functional residual capacity
(D) Fetal oxygen consumption
(E) Increased cardiac output
C
A 68-year-old man has signs of a coagulopathy after receiving 10 units of packed erythrocytes during emergency repair of a leaking abdominal aortic aneurysm. The most likely cause is
A 50-year-old patient undergoes subtotal thyroidectomy for Graves' disease. In the immediate postoperative period, he has marked hoarseness but no stridor. The most likely cause of the hoarseness is trauma to the
(A) external branch of the superior laryngeal nerve
(B) internal branch of the superior laryngeal nerve
A patient is undergoing exploration of a stab wound to the left side of the neck. On awake laryngoscopy, the left vocal cord is in midposition and the right vocal cord is abducted during inspiration. The most likely cause of these findings is trauma to which of the following structures on the left?
During laser microsurgery of the larynx, a rubber endotracheal tube wrapped with aluminum-foil tape starts to smolder and give off smoke. The first step is to
(A) suction the endotracheal tube
(B) add helium to the inspired gas mixture
(C) remove the endotracheal tube
(D) turn off the fresh gas flow
(E) pack a saline-soaked gauze sponge into the hypopharynx
C
Each of the following values is associated with acute tubular necrosis EXCEPT
A 30-year-old woman has an abrupt change from sinus to nodal rhythm with unchanged heart rate on ECG during induction of halothane anesthesia. Which of the following is the most likely result of this change?