A 22-year-old woman with preeclampsia has undergone emergency cesarean delivery during general anesthesia. At the completion of the surgery, attempts at reversal of vecuronium are unsuccessful. Each of the following could be a cause of this failure EXCEPT
(A) hypoalbuminemia
(B) hypothermia
(C) perioperative administration of gentamicin
(D) perioperative administration of magnesium sulfate
(E) respiratory acidosis
A
The drug that causes dose-dependent EEG evidence of both central nervous system excitation and depression is
A decreased dose of sodium thiopental is administered to patients in hypovolemic shock primarily because
(A) acidosis increases the fraction of unionized drug
(B) delivery of the drug to the brain is increased
(C) hepatic clearance is decreased
(D) thiopental is a myocardial depressant
(E) thiopental is a venous dilator
E
When antagonizing neuromuscular block produced by pancuronium, the combination of simultaneously administered anticholinergic and anticholinesterase drugs that is most likely to produce bradycardia is
An oxygen-driven anesthesia ventilator with a bellows that ascends during exhalation develops a small hole in the bellows. Which of the following is the most likely effect?
(A) Alveolar hyperinflation
(B) Decreased inspiratory flow rate
(C) Decreased inspired oxygen concentration
(D) Increased concentration of inhalational agent
(E) Rebreathing of exhaled gases
A
Which of the following statements concerning pressure support ventilation is true?
(A) It augments gas inflow in response to spontaneous inspiration
(B) It increases inspiratory airway pressure during controlled mandatory ventilation
(C) It requires the use of positive end-expiratory pressure
(D) It functions independently of airway resistance/lung compliance
(E) It correlates linearly with spontaneously achieved tidal volume
A 70-kg 78-year-old man undergoing small-bowel resection during anesthesia with isoflurane in oxygen becomes hypotensive and develops frothy pink sputum in the endotracheal tube. Heart rate is 50 bpm, blood pressure is 75/60 mmHg, pulmonary artery occlusion pressure is 22 mmHg, and cardiac output is 1.7 L/min. The most appropriate initial step in management is administration of which of the following?