10 Random Questions
A healthy, 18-year-old, 65-kg woman undergoing diagnostic laparoscopy is being monitored with a properly functioning and calibrated capnograph. The end-tidal carbon dioxide concentration is 6%, and the inspired carbon dioxide concentration is 1%. This may be caused by each of the following EXCEPT
- (A) malfunction of the expiratory valve in a circle system
- (B) low gas inflow with a Bain circuit
- (C) exhausted soda lime within a circle system
- (D) absorption of carbon dioxide from carbon dioxide laparoscopy
- (E) carbon dioxide in the fresh gas flow
Which of the following perioperative interventions decreases the risk for renal insufficiency in patients undergoing aortic aneurysm repair?
- (A) Administration of furosemide
- (B) Administration of mannitol
- (C) Administration of renal-dose dopamine
- (D) Epidural anesthesia
- (E) Preoperative volume expansion
The best indication that a patient is ready for discharge from an outpatient facility after spinal anesthesia is return of
- (A) pinprick sensation to the S4-5 dermatome
- (B) micturition
- (C) plantar flexion
- (D) proprioception of the big toe
- (E) knee extension
When succinylcholine is administered intravenously to infants, intragastric pressure
- (A) is usually unchanged
- (B) increases to a peak of 30 cmH20 within two minutes
- (C) increases because of abdominal muscle fasciculations
- (D) increases because of an acetylcholine-like effect on the vagus nerve
- (E) peaks and subsides within five minutes
After the first 70 minutes of a transurethral resection of the prostate, a 70-year-old man becomes confused and has tachycardia, hypertension, and shortness of breath. Serum sodium concentration is 116 mEq/L. After informing the surgeon that the procedure should be terminated as soon as possible, the most appropriate next step would be to
- (A) administer furosemide
- (B) administer labetalol
- (C) administer 3% sodium chloride
- (D) change the irrigating solution to normal saline
- (E) induce general endotracheal anesthesia
Compared with a patient without liver disease, a patient with cirrhosis will have
- (A) greater accumulation of vecuronium with infusion
- (B) increased unbound plasma vecuronium concentration
- (C) more frequent occurrence of phase II block after succinylcholine administration
- (D) prolonged elimination half-life of atracurium
- (E) unchanged volume of distribution for pancuronium
A middle-aged, 70-kg man with a brain tumor is scheduled for an elective craniotomy. Preoperatively, he is alert but papilledema is present. Anesthesia is induced with thiopental 300 mg and succinylcholine 100 mg, followed by tracheal intubation. Immediately following intubation vigorous bucking occurs. The best immediate management would be to
- (A) administer succinylcholine 100 mg intravenously
- (B) administer fentanyl 500 jug intravenously
- (C) hyperventilate with isoflurane 2%
- (D) administer thiopental 400 mg intravenously
- (E) hyperventilate and administer lidocaine 1 mg/kg intravenously
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 beneficial effect of continuous positive airway pressure in a newborn with respiratory distress syndrome is
- (A) increased functional residual capacity
- (B) decreased airway resistance
- (C) promotion of surfactant formation
- (D) increased alveolar PO2
- (E) maintenance of functional closure of the foramen ovale
An elderly man has an acute dissection of the descending thoracic aorta. Which of the following antihypertensive therapies is most likely to extend the dissection?
- (A) Esmolol infusion
- (B) Nitroglycerin infusion
- (C) Nitroprusside infusion
- (D) Nitroprusside infusion combined with a beta-adrenergic blocker
- (E) Trimethaphan infusion