10 Random Questions
Preoperative administration of alpha-adrenergic inhibitors will usually reverse ECG changes due to
- (A) catecholamine myocarditis
- (B) Preoperative administration of alpha-adrenergic inhibitors decreases operative mortality
- (C) Beta-adrenergic inhibitors should be administered preoperatively only in conjunction with alpha-adrenergic
- inhibitors
- (D) Vasopressor therapy may be necessary postoperatively for treatment of hypotension
In a patient with surgically significant aortic insufficiency, cardiac output measured by thermodilution will
- (A) be greater than right ventricular output
- (B) be less than left ventricular output
- (C) be less than cardiac output measured by the Fick method
- (D) be inaccurate because of decreased signal-to-noise ratio
- (E) underestimate net systemic arterial blood flow
During application of continuous positive airway pressure, lung compliance increases because of
- (A) decreased airway resistance
- (B) decreased lung water
- (C) decreased venous return
- (D) increased intercostal muscle tone
- (E) increased resting lung volume
A 40-year-old woman with Graves' disease is undergoing thyroidectomy with 1% isoflurane, 60% nitrous oxide, and oxygen. During surgical manipulation of the thyroid, temperature increases to 38.5°C, heart rate to 160 bpm, and blood pressure to 150/100 mmHg. The most appropriate initial treatment is to
- (A) administer dantrolene sodium
- (B) administer potassium iodide
- (C) administer propranolol
- (D) administer propylthiouracil
- (E) increase the concentration of isoflurane
Each of the following is a recognized complication during a transurethral resection for which glycine is used as an irrigant EXCEPT
- (A) disseminated intravascular coagulopathy
- (B) hemolysis
- (C) hyperammonemia
- (D) shoulder pain
- (E) transient blindness
Which of the following shaded areas most accurately represents the dead space of a properly functioning circle system?
When the inspired gas is changed from air to 20% oxygen and 80% nitrous oxide, PaO2 increases because
- (A) increased pulmonary artery pressure perfuses alveoli that previously enhanced dead space
- (B) nitrous oxide stimulates the respiratory center
- (C) rapid absorption of nitrous oxide increases alveolar oxygen concentration
- (D) replacement of nitrogen by nitrous oxide expands atelectatic alveoli
- (E) respiratory depression from nitrous oxide shifts the oxyhemoglobin dissociation curve
Which of the following statements concerning the cardiovascular effects of intravenous bupivacaine is true?
- (A) Intralipid is effective in treating bupivacaine-induced ventricular arrhythmias
- (B) Cardiovascular toxicity is decreased during pregnancy
- (C) Cardiovascular toxicity occurs at lower blood levels than central nervous system toxicity
- (D) Systemic vascular resistance is unchanged
- (E) The rate of impulse conduction through the heart is increased
If the low-pressure alarm of an anesthesia circuit is broken, which of the following monitors will provide the earliest indication of a disconnected ventilator hose?
- (A) Fail-safe system
- (B) Infrared capnograph
- (C) Nitrogen analyzer
- (D) Oxygen analyzer
- (E) Pulse oximeter
A 64-year-old, 70-kg woman treated with lithium for manic-depressive psychosis is given methohexital 90 mg and succinylcholine 35 mg intravenously for electroconvulsive therapy. Ten minutes later she remains sedated and the peripheral nerve stimulator shows a decreased twitch response. The most likely explanation is
- (A) cerebral hypoxia
- (B) postictal depression
- (C) relative overdose of methohexital
- (D) unrecognized atypical pseudocholinesterase
- (E) residual lithium effects