Forty-eight hours after thoracotomy, a patient's T6-7 epidural catheter is removed and the distal 2 cm is noted to be missing. The patient felt no pain during removal and neurologic examination shows no abnormalities. After informing the patient, which of the following is the most appropriate next step in management?
A healthy 60-kg 52-year-old woman undergoing reduction mammoplasty is anesthetized with isoflurane and oxygen, and deliberate hypotension to 80/40 mmHg is induced with nitroprusside. Urine output through an indwelling urethral catheter has been 10 mL during the past hour. You should now
(A) administer furosemide 40 mg intravenously
(B) infuse normal saline solution until urine output reaches 35 mL/hr
(C) administer dopamine at 3 mcg/kg/min
(D) expect normal urine flow with restoration of normal blood pressure
A 40-year-old woman has continuous nondermatomal burning pain of the distal foot four weeks after sustaining a metatarsal fracture. On examination, the foot is mildly swollen, tender, and cool. Which of the following statements concerning this condition is true?
(A) A radiograph of the distal bones of the painful foot will show severe osteoporosis
(B) A technetium scan of the distal joints of the painful foot will show decreased uptake
(C) Early use of opioid analgesia will prevent progression of the symptoms
(D) Intravenous phentolamine will relieve the pain
(E) The chance of spontaneous recovery within eight weeks is greater than 80%
A 32-year-old patient with end-stage renal failure has irreversible neuromuscular blockade two hours after tracheal intubation with a muscle relaxant. Which of the following is the most likely cause?
A 46-year-old man is scheduled for repair of an inguinal hernia. Six years ago, he had an episode of malignant hyperthermia during cholecystectomy. Which of the following is the most appropriate perioperative management?
(A) Administration of a regional anesthetic
(B) Administration of dantrolene orally for two days prior to surgery
(C) Avoidance of all inhalational anesthetics except isoflurane
(D) Avoidance of ester local anesthetics
(E) Flushing the anesthesia machine with oxygen 10 L/min for a minimum of 12 hours