10 Random Questions
Six hours after coronary artery bypass grafting, a pulmonary artery catheter oximeter shows a mixed venous hemoglobin oxygen saturation of 50%. This value may result from each of the following EXCEPT
(A) anemia
(B) fever
(C) hypovolemia
(D) respiratory alkalosis
(E) shivering
Reveal Answer
ADVANCED
General
Compared with intermittent positive pressure ventilation (IPPV), intermittent mandatory ventilation (IMV)
(A) better maintains cardiac output
(B) provides less than full mechanical ventilatory support
(C) requires a greater level of sedation
(D) requires a higher FlO2
(E) requires a lower inspiratory flow rate
Reveal Answer
BASIC
Respiratory & Critical Care
Each of the following would be expected in an otherwise healthy 165-kg woman undergoing cholecystectomy EXCEPT
(A) decreased functional residual capacity
(B) decreased ventilatory response to carbon dioxide
(C) increased cardiac output
(D) increased gastric fluid volume
(E) increased metabolism of volatile anesthetics
Reveal Answer
ADVANCED
General
In which of the following clinical circumstances does down-regulation of beta-adrenergic receptors occur?
(A) Chronic congestive heart failure
(B) Hypothyroidism
(C) Long-term clonidine administration
(D) Long-term metoprolol administration
(E) Stable angina
Reveal Answer
The Bain circuit
(A) provides nearly identical delivered and inspired anesthetic concentrations
(B) has the fresh gas flow inlet near the reservoir bag
(C) is a nonrebreathing circuit at any fresh gas flow rate
(D) is most efficient during spontaneous ventilation
(E) has a time constant greater than 1 minute for change in inspired anesthetic concentrations
Reveal Answer
BASIC
Equipment & Physics
If a patient with excessive bleeding during exploratory laparotomy has a normal activated clotting time, the LEAST likely cause of the bleeding is
(A) antithrombin III deficiency
(B) dilutional thrombocytopenia
(C) fibrinolysis
(D) administration of heparin 5000 units
(E) preoperative ingestion of aspirin
Reveal Answer
ADVANCED
Cardiac
A patient with end-stage renal disease has prolonged ventilatory depression after administration of morphine. The most likely cause is increased
(A) serum concentration of morphine-6-glucuronide
(B) elimination half-life of morphine
(C) opioid receptors
(D) receptor affinity
(E) volume of distribution
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
The most important cause of hypotension that occurs normally at initiation of cardiopulmonary bypass is
(A) hemodilution
(B) acidosis
(C) decreased flow rate
(D) vasodilation
(E) hypothermia
Reveal Answer
During induction of anesthesia for cesarean delivery, pancuronium is inadvertently substituted for succinylcholine. The neonate shows no clinical signs of muscle relaxation because pancuronium is
(A) highly ionized
(B) highly protein bound
(C) a large molecule
(D) lipid soluble
(E) unaffected by "ion trapping"
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
The induction dose of thiopental should be decreased in each of the following situations EXCEPT
(A) age greater than 70 years
(B) cardiogenic shock
(C) decreased hepatic blood flow
(D) hypoalbuminemia
(E) hypothyroidism
Reveal Answer
ADVANCED
Pharmacology & Pharmacokinetics