Following axillary block for insertion of an arteriovenous fistula in the forearm, a patient has pain on surgical incision. Which of the following nerves should be blocked to relieve this pain?
A moderately obese 38-year-old woman is using patient-controlled morphine analgesia one day after open cholecystectomy. While breathing room air, oxygen saturation is 85%, Pa02 is 48 mmHg, PaC02 is 42 mmHg, and pH is 7.36. In addition to administration of oxygen, the most effective management is to
Each of the following is associated with an increased alveolar-arterial oxygen tension difference EXCEPT
A 25-year-old man requires exploratory laparotomy following a motor vehicle accident. He is acutely intoxicated with alcohol. Which of the following is the most likely result of the alcohol ingestion?
Which the following findings is most hazardous in premature infants?
A patient has palpitations, flushing, and light-headedness after gingival injection of a local anesthetic. This reaction is most likely caused by
A patient has severe hypotension, bronchospasm, and edema of the upper airway after injection of radiocontrast medium during cerebral angiography. The most appropriate immediate treatment is administration of
A 26-year-old woman has weakness on extension of the right knee one day after uneventful vaginal delivery under spinal anesthesia with lidocaine. The most likely cause is
During induction of anesthesia in a 70-year-old man with aortic stenosis, the blood pressure decreases from 140/ 80 to 70/45 mmHg as the cardiac rhythm changes from normal sinus at 70 bpm to junctional at 120 bpm. The most appropriate initial therapy would be
A 15-year-old previously healthy boy is scheduled for a celiotomy to relieve an acute intestinal obstruction. A rapid sequence induction is used. Anesthesia is maintained with a balanced technique including nitrous oxide and oxygen (5L:2L), meperidine, and pancuronium. Because of abdominal distention and the high pressure required for inflation of the lungs, a nasogastric tube is inserted. The abdomen remains distended, but compliance improves dramatically. At this time the patient is cyanotic, PaO2 is 48 mmHg, PaCO2 is 52 mmHg, and pH is 7.29. Nitrous oxide is discontinued. The most important therapeutic measure is to