10 Random Questions
Which of the following is the most reliable indicator of antagonism of nondepolarizing neuromuscular block sufficient for airway protection?
- (A) Clinically assessed ulnar nerve train-of-four ratio of 0.75
- (B) Peak negative pressure of 25 cmH2O
- (C) End-tidal PC02 of 40 mmHg during spontaneous ventilation
- (D) Sustained head lift for 5 seconds
- (E) Vital capacity of 15 ml/kg
Six months after repair of a lacerated peroneal nerve, a patient has electric-shock-like pain when pressure is applied to the middle of the gastrocnemius muscle. The most appropriate initial management is
- (A) administration of carbamazepine
- (B) epidural injection of morphine
- (C) local infiltration with bupivacaine
- (D) lumbar sympathetic blockade
- (E) peroneal nerve blockade
A patient undergoes differential spinal block for evaluation of persistent foot pain. If the pain returns coincident with a decrease in skin temperature, which of the following is the most appropriate conclusion?
- (A) A somatic origin is ruled out
- (B) The patient has causalgia
- (C) The patient has peripheral vascular disease
- (D) The pain is caused by central neuropathy
- (E) Lumbar sympathetic blocks are indicated
A 10-week-old infant born at 28 weeks gestation is scheduled for elective repair of bilateral inguinal hernias. It is most appropriate to
- (A) delay the operation until the infant is 6 months old
- (B) transfuse blood preoperatively if hemoglobin concentration is 9 g/dl
- (C) avoid tracheal intubation
- (D) limit inspired oxygen concentration to less than 50%
- (E) monitor for apnea for 24 hours postoperatively
The ECG rhythm shown developed during cholecystectomy in a 62-year-old man who had a myocardial infarction and is taking atenolol. The drug of choice for treating this dysrhythmia is
- (A) atropine
- (B) bretylium
- (C) isoproterenol
- (D) lidocaine
- (E) procainamide
A 55-year-old man is undergoing craniotomy in the sitting position. Mean arterial pressure is 75 mmHg; arterial blood gas values are PaCO2 41 mmHg and pH 7.37. End-tidal CO2 is 7 mmHg. Which of the following is the most likely cause of the increased PaCO2 to PetCO2 gradient?
- (A) Decreased cardiac output
- (B) Endobronchial intubation
- (C) Hyperinflation of the lungs
- (D) Partial disconnect of the capnograph sample tubing
- (E) Venous air embolism
Phantom limb pain is an example of which of the following types of pain?
- (A) Central pain
- (B) Nociceptive pain
- (C) Psychosomatic pain
- (D) Sympathetically mediated pain
- (E) Vasospastic pain
Which of the following statements about the standard error of the mean (SE) is true?
- (A) Sample mean SE has approximately a 95% chance of containing the population mean
- (B) The SE describes the precision of the population mean
- (C) The SE describes the range of the sample values
- (D) The SE is greater than the standard deviation
- (E) The SE is obtained by multiplying the sample standard deviation by the square root of the sample size
A 62-year-old man is scheduled for coronary artery bypass grafting. During induction of anesthesia with fentanyl, high peak inspiratory pressures occur with manual ventilation, and peripheral oxygen saturation decreases from 100% to 94%. The most appropriate management is administration of
- (A) albuterol
- (B) isoflurane
- (C) midazolam
- (D) nitroglycerin
- (E) succinylcholine
A 25-year-old woman undergoes a difficult open cholecystectomy during anesthesia with isoflurane, nitrous oxide, fentanyl, and vecuronium. Five units of blood are administered intraoperatively. Two days later, the patient has mildly increased serum transaminase concentrations and markedly increased alkaline phosphatase and direct bilirubin concentrations. Which of the following is the most likely cause?
- (A) Acute viral hepatitis
- (B) Hemolysis
- (C) Isoflurane-induced liver dysfunction
- (D) Retained common duct stone
- (E) Sepsis