10 Random Questions
A 37-year-old woman with pregnancy-induced hypertension develops oliguria two hours after cesarean delivery during epidural .anesthesia. Despite infusion of 2000 mL of crystalloid solution, urine output remains 10 mL/hr. Which of the following laboratory findings is most suggestive of acute tubular necrosis?
- (A) Blood urea nitrogen level of 30 mg/dL
- (B) Serum creatinine level of 1.2 mg/dL
- (C) Urinary/plasma osmolality of 1:1
- (D) Urinary sodium level of 10 mEq/L
- (E) Urinary specific gravity of 1.024
Which of the following must be considered during perioperative management of a patient on long-term lithium therapy?
- (A) Intravenous fluids should include sodium
- (B) Therapy should be discontinued for 14 days prior to anesthesia
- (C) The requirement for succinylcholine is increased
- (D) The requirement for volatile anesthetics is increased
- (E) Urine output should be maintained with furosemide
A 50-year-old woman notes loss of sensation in the medial lower leg 24 hours after vaginal hysterectomy in the lithotomy position. Which of the following nerves is most likely to be injured?
- (A) Lateral femoral cutaneous
- (B) Obturator
- (C) Peroneal
- (D) Saphenous
- (E) Tibial
In a patient taking a beta-adrenergic blocker, the drug most likely to produce atrioventricular junctional block is
- (A) diltiazem
- (B) fentanyl
- (C) halothane
- (D) nifedipine
- (E) verapamil
The tracing indicates that the pacemaker generator is
- (A) malfunctioning
- (B) VVT sensing and capturing normally
- (C) VOO sensing and capturing normally
- (D) DVI sensing and capturing normally
- (E) VVI sensing and capturing normally
The most likely explanation for the intraoperative capnographic tracing shown is
- (A) cardiac oscillation
- (B) exhaustion of soda lime
- (C) kinking of the endotracheal tube
- (D) partial recovery from vecuronium
- (E) presence of water droplets in the analyzer
A newly developed inhalational anesthetic has a blood-gas partition coefficient of 0.2. Which of the following statements best describes this drug compared with isoflurane?
- (A) MAC is lower
- (B) The difference between Fa and Fl during maintenance of anesthesia is greater
- (C) Time to emergence is shorter
- (D) Rapid induction requires greater overpressure
- (E) Equilibrium in a circle system with the same flow of fresh gas is slower
Depression of cerebral oxygen requirements below the level required to create an isoelectric EEG can be achieved by
- (A) administration of isoflurane
- (B) administration of nimodipine
- (C) barbiturate coma
- (D) hyperventilation
- (E) hypothermia
A patient sustains cardiac arrest while being mechanically ventilated. Which of the following is the most likely effect on PetCO2?
- (A) Gradual increase with the duration of asystole
- (B) Maintenance of the prearrest value
- (C) Abrupt decrease below the prearrest value
- (D) Decrease when thoracic compression is started
- (E) Gradual decrease independent of the ventilator cycle
A direct 5-joule shock is unsuccessful in converting ventricular fibrillation occurring after discontinuation of cardiopulmonary bypass. The most appropriate next step is to
- (A) administer calcium chloride
- (B) administer bretylium
- (C) administer regular insulin
- (D) administer sodium bicarbonate
- (E) increase shock energy