10 Random Questions
Which of the following is a side effect of beta-adrenergic blockade?
- (A) Cerebral vasodilation
- (B) Decreased left ventricular filling pressures
- (C) Hypokalemia
- (D) Increased airway resistance
- (E) Uterine relaxation
Desflurane is delivered using a vaporizer that contains internal heaters because
- (A) heat decreases the drug's viscosity
- (B) heat reduces thermal loss in the patient
- (C) heat increases the drug's oil-gas partition coefficient
- (D) heat prevents fluctuations of vapor pressure
- (E) it does not vaporize adequately at room temperature
A patient is bleeding excessively after routine transurethral resection of the prostate. Re-exploration discloses diffuse oozing. The most appropriate management is administration of
- (A) platelets
- (B) fresh frozen plasma
- (C) desmopressin
- (D) epsilon-aminocaproic acid
- (E) cryoprecipitate
Anesthesia is induced with halothane in a 3-year-old girl. Sixty seconds after administration of succinylcholine 1 mg/kg intravenously, heart rate decreases rapidly from 120 to 60 bpm. The most likely cause is
- (A) acute hyperkalemia
- (B) failure to pretreat with a nondepolarizing relaxant
- (C) halothane overdose
- (D) muscarinic activity
- (E) sympathetic ganglionic blockade
The most effective treatment of severe carbon monoxide poisoning in a 2-year-old child is
- (A) intravenous administration of methylene blue
- (B) intravenous administration of thiocyanate
- (C) intravenous administration of thiosulfate
- (D) exchange transfusion
- (E) hyperbaric oxygenation
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
The five curves shown represent the uptake of enflurane, desflurane, halothane, isoflurane, and nitrous oxide. Which uptake curve best depicts desflurane?
- (A) Curve A
- (B) Curve B
- (C) Curve C
- (D) Curve D
- (E) Curve E
Pulmonary artery diastolic pressure increases acutely from 10 to 20 mmHg in a 28-year-old man undergoing cervical laminectomy in the sitting position. The most appropriate first step in the management of this patient is to
- (A) administer furosemide
- (B) aspirate from the proximal port of the pulmonary artery catheter
- (C) inflate the balloon on the pulmonary artery catheter
- (D) place the patient in the left lateral decubitus position
- (E) start an infusion of nitroglycerin
A 65-year-old man undergoes prostatectomy in the lithotomy position under spinal anesthesia using bupivacaine 12 mg. Ten hours later, he reports that his left foot is numb. Examination shows decreased pinprick sensation over the lateral dorsal aspect of the left foot; dorsiflexion is limited. Which of the following is the most likely cause?
- (A) Cauda equina syndrome
- (B) Compression of the common peroneal nerve
- (C) Compression of the posterior tibial nerve
- (D) L5 nerve root damage
- (E) Stretching of the sciatic nerve
Which of the following statements concerning relationships among alveolar pressure, volume, and surface tension is true?
- (A) Surface tension of surfactant decreases as alveolar volume decreases
- (B) Surface tensions of water and of surfactant behave similarly as volume decreases
- (C) Changes in alveolar surface tension with volume are the same during expansion as during contraction
- (D) Pressure in the alveolus is inversely related to surface tension
- (E) Pressure in the alveolus is directly related to alveolar radius