10 Random Questions
The accuracy of oxyhemoglobin saturation determined by digital pulse oximetry is affected significantly by each of the following EXCEPT
- (A) movement of the patient
- (B) isovolemic hemodilution to a hematocrit of 23%
- (C) position of the operating room light
- (D) intravenous administration of methylene blue
- (E) infusion of phenylephrine
A 55-year-old man who is scheduled to undergo carotid endarterectomy (CEA) has a persistent myocardial filling defect at three hours on a dipyridamole-thallium scan. Which of the following statements is correct?
- (A) Coronary autoregulation is effective in this segment
- (B) Coronary revascularization should precede CEA
- (C) Isoflurane is contraindicated
- (D) Myocardial infarction is impending
- (E) There is a segment of nonviable myocardium
With long-term administration, which of the following drugs produces the most prolonged sedative effect of diazepam?
- (A) Cimetidine
- (B) Famotidine
- (C) Metoclopramide
- (D) Ranitidine
- (E) Warfarin
Inhibition of labor by terbutaline causes each of the following maternal side effects EXCEPT
- (A) hyperkalemia
- (B) hypotension
- (C) ventricular dysrhythmias
- (D) hyperglycemia
- (E) pulmonary edema
As part of a preoperative evaluation, a patient had a thallium scan showing a "cold spot" over the left ventricle that occurs with moderate exercise and disappears at rest. This most likely indicates
- (A) moderate-sized aneurysm of the left ventricle
- (B) acute myocardial ischemia
- (C) recent myocardial infarction
- (D) old myocardial infarction
- (E) Prinzmetal's variant angina
Mivacurium-induced neuromuscular blockade is prolonged for the greatest period of time in patients who have which of the following conditions?
- (A) Ethanol-induced hepatitis
- (B) Hemiplegia
- (C) Pseudocholinesterase deficiency
- (D) Renal insufficiency
- (E) Thermal burns
Which of the following is the most likely cause of the coronary steal phenomenon?
- (A) Idiopathic hypertrophic subaortic stenosis (IHSS)
- (B) Decreased cardiac contractility
- (C) Dilation of coronary arterioles
- (D) Dilation of epicardial coronary arteries
- (E) Increased systemic vascular resistance
The most likely explanation for the intraoperative capnographic tracing shown is
- (A) cardiac oscillation
- (B) exhaustion of soda lime
- (C) kinking of the endotracheal tube
- (D) partial recovery from vecuronium
- (E) presence of water droplets in the analyzer
Which of the following is an advantage of a circle system over a Mapleson D system?
- (A) Better anesthetic conservation
- (B) Lower dead space
- (C) Lower circuit resistance
- (D) More efficient scavenging
- (E) More rapid changes in inspired gas concentration
Which of the following premedicant drug combinations is most effective in preventing passive regurgitation during anesthesia?
- (A) Cimetidine and glycopyrrolate
- (B) Metoclopramide and atropine
- (C) Metoclopramide and ranitidine
- (D) Metoclopramide, atropine, and ranitidine
- (E) Metoclopramide and sodium bicitrate