Which of the following drugs increases gastric pH while decreasing gastric volume?
(A) Glycopyrrolate
(B) Magnesium trisilicate
(C) Metoclopramide
(D) Ranitidine
(E) Sodium citrate
D
Addition of 20 cmH2O positive end-expiratory pressure to a patient receiving controlled mechanical ventilation decreases cardiac output and left ventricular function by
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
Which of the following is the most common cause of peroneal nerve damage?
(A) Crossed legs in the supine position
(B) Lateral decubitus position
(C) Prone position
(D) Reverse Trendelenburg position
(E) Improper placement of a pelvic retractor
B
In a patient who is receiving nitroglycerin intravenously after a coronary artery operation, peripheral oxygen saturation is 85% and PaO2 is 200 mmHg. The most appropriate management is administration of
A 26-year-old woman has headache, nausea, and photophobia 36 hours after cesarean delivery for chorioamnionitis using subarachnoid block. Temperature is 38.8°C and leukocyte count is 14,200/mm3. Which of the following is the most appropriate next step in management?
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?
An anesthesia machine is set to deliver oxygen 2 L/min, nitrous oxide 2 L/min, and sevoflurane. After 30 minutes of stable anesthesia, which of the following, is the most likely cause of a decrease in the oxygen analyzer reading from 50% to 30%?
(A) A leak in the ventilator bellows
(B) Accumulation of water on the oxygen sensor membrane
(C) Calibration at 100% oxygen using less than 100% oxygen
(D) Disconnection of the wall oxygen hose
(E) Presence of the oxygen analyzer in the expiratory limb