Two hours after coronary artery bypass grafting, a 60-year-old man has a heart rate of 140 bpm and blood pressure of 80/60 mmHg. Cardiac index is 1.5 L/min/m2. Central venous pressure is 23 mmHg with large a-waves in the right atrial pressure tracing. A pulsus paradoxus of 6 mmHg is noted. Which of the following is the most likely diagnosis?
A newly developed volatile anesthetic has a MAC of 10% in oxygen for adults. Which of the following statements concerning this anesthetic is true?
A patient is undergoing exploration of a stab wound to the left side of the neck. On awake laryngoscopy, the left vocal cord is in midposition and the right vocal cord is abducted during inspiration. The most likely cause of these findings is trauma to which of the following structures on the left?
A 60-kg, 38-year-old woman undergoes laparoscopic tubal ligation. Paralysis is maintained for one hour with infusion of succinylcholine at a rate of 10 mg/min. At the end of the procedure, respirations are shallow and tetanic fade is noted on neuromuscular stimulation. In addition to continued mechanical ventilation, which of the following is the most appropriate next step in management?
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?
Following blunt trauma to the chest, a patient has tachycardia, hypotension, and markedly distended neck veins. Each of the following is expected EXCEPT
A 60-year-old obese man who has an antithrombin III deficiency is scheduled for radical prostatectomy. Prior to the operation this patient should receive
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?
In a normally functioning circle anesthesia system, if the length of the inspiratory and expiratory hose is doubled, the mechanical dead space will be
A 66-year-old woman with essential hypertension has a preoperative blood pressure of 160/95 mmHg despite receiving the usual dose of labetalol on the morning of surgery. Following endotracheal intubation, blood pressure increases to 220/120 mmHg. Which of the following is the most likely explanation?