10 Random Questions
Which of the following statements best describes testing for susceptibility to malignant hyperthermia (MH)?
- (A) Live skeletal muscle cells are required for testing
- (B) The MH gene is located on the X chromosome
- (C) Muscle biopsy is appropriate in children younger than 1 year
- (D) A normal serum creatine phosphokinase concentration eliminates the need for muscle biopsy
- (E) Succinylcholine is used to stimulate muscle obtained on biopsy for MH
A 70-year-old patient has absence of the left radial pulse one month after repair of an aortic aneurysm. Arterial pressure was monitored perioperatively with a 20-gauge left radial artery catheter. Which of the following statements concerning this complication is true?
- (A) A preoperative Allen's test would have predicted this complication
- (B) Stellate ganglion block should be performed
- (C) This complication would have been less likely with an 18-gauge catheter
- (D) This patient has poor collateral circulation in the hand
- (E) The pulse will likely return
The trend plot shows end-tidal gases measured during a radical neck dissection. The event occurring at A is most likely
- (A) acute hypotension
- (B) endobronchial intubation
- (C) kinking of the endotracheal tube
- (D) rupture of the endotracheal cuff
- (E) venous air embolism
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 normal adult is receiving general anesthesia via a standard circle system and controlled ventilation. Mass spectrometer data are shown. Which event is most compatible with these data?
- (A) Endobronchial intubation
- (B) Hemorrhagic shock
- (C) Incompetent expiratory valve
- (D) Substantial decrease in fresh gas flow
- (E) Venous air embolism
Which of the following remains normal in an otherwise healthy patient with obesity?
- (A) Alveolar PO2
- (B) Expiratory reserve volume
- (C) Functional residual capacity
- (D) Lung compliance
- (E) Static lung volumes
A 45-year-old woman undergoes aortic valve replacement for aortic stenosis. Two minutes after removal of the venous cannulae, air is noted in the arterial inflow cannula. Heart rate is 80 bpm, blood pressure is 95/60 mmHg, and cardiac index is 1.5 L/min/m2. ST-segment elevation is noted in EKG leads II, III, and aVF. The most appropriate next step is to
- (A) administer thiopental
- (B) decrease left ventricular afterload
- (C) increase arterial blood pressure
- (D) replace the left ventricular vent
- (E) resume cardiopulmonary bypass
Halothane anesthesia is usually associated with an increase in
- (A) cardiac contractility
- (B) venous capacitance
- (C) arterial pressure
- (D) venous return
- (E) heart rate
The most likely cause of bilateral fixed and dilated pupils after clipping of a basilar artery aneurysm is
- (A) preoperative administration of atropine
- (B) intraoperative infusion of trimethaphan
- (C) naloxone antagonism of opioid
- (D) persistent hypothermia
- (E) brain stem ischemia
An infant with congenital lobar emphysema is scheduled for thoracotomy. Which of the following should be included in the anesthetic management of this infant?
- (A) Helium-oxygen inspired gas mixture
- (B) Nitrous oxide administration
- (C) Positive pressure ventilation
- (D) Prophylactic placement of a chest tube
- (E) Spontaneous ventilation until the chest is opened