10 Random Questions
A 65-year-old patient receiving long-term clonidine therapy fails to take it one day before surgery. This would most likely
- (A) be beneficial, since clonidine decreases cardiac output
- (B) be of no consequence due to the long half-life of clonidine
- (C) produce a lower anesthetic requirement than if the drug had been continued
- (D) produce rebound hypertension
- (E) result in seizure activity
Phase II neuromuscular block is characterized by
- (A) depressed twitch height, sustained tetanus, post-tetanic potentiation
- (B) depressed twitch height, tetanic fade, post-tetanic potentiation
- (C) depressed twitch height, tetanic fade, no post-tetanic potentiation
- (D) normal twitch height, tetanic fade, post-tetanic potentiation
- (E) normal twitch height, tetanic fade, no post-tetanic potentiation
A previously healthy 28-year-old man is admitted to the emergency department with a probable opioid overdose. Arterial blood gas values are: PaO2 49 mmHg, PaCO2 76 mmHg, and pH 7.12 while breathing room air. Which of the following statements is true?
- (A) Aspiration of gastric contents must have occurred
- (B) Hypoventilation alone can explain the acidosis and hypoxemia
- (C) The hypoxemia is probably due to noncardiogenic pulmonary edema
- (D) Naloxone should be administered only if the patient is normothermic
- (E) Pure oxygen is contraindicated
A 60-kg, 17-year-old girl with severe idiopathic scoliosis is scheduled for Harrington rod fixation. Which of the following respiratory parameters is compatible with this disorder?
- (A) Alveolar-to-arterial oxygen tension difference (A-aDO2) less than 100 mmHg while breathing pure oxygen
- (B) FEV1/FVC ratio less than 50%
- (C) Forced vital capacity less than 2000 ml
- (D) Intrapulmonary shunt less than 10%
- (E) Normal pulmonary vascular resistance
Each of the following is associated with an increased alveolar-arterial oxygen tension difference EXCEPT
- (A) advanced age
- (B) atelectasis
- (C) decreased cardiac output
- (D) decreased Fl02
- (E) right-to-left intracardiac shunt
Which of the following time concentration curves would be expected in arterial blood following intravenous injection of indocyanine green dye in a 3-year-old child with a small ventricular septal defect?
Compared with labetalol for induction of hypotension, nitroprusside is associated with
- (A) greater cerebral vasodilation
- (B) greater dependence on hepatic metabolism
- (C) less activation of the renin-angiotensin system
- (D) less intrapulmonary shunt
- (E) less venodilation
The mortality rate of patients given drug A is 12% (8 of 66) and the mortality rate of patients given drug B is 15% (10 of 66). Which of the following tests is most appropriate to compare these mortality rates?
- (A) t-Test for paired data
- (B) t-Test for unpaired data
- (C) Wilcoxon rank test
- (D) Chi-square test
- (E) Analysis of covariance
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
Following completion of an ankle block, the patient reports intact sensation on the tips of the toes. Which of the following nerves was blocked inadequately?
- (A) Deep peroneal
- (B) Posterior tibial
- (C) Saphenous
- (D) Superficial peroneal
- (E) Sural