In an adult undergoing laparotomy, which of the following is the most effective means of maintaining body temperature during the first hour of anesthesia?
During anesthesia with nitrous oxide and isoflurane in a 70-kg, 25-year-old patient, airway resistance would be decreased by
A patient being mechanically ventilated in the ICU requires wound debridement twice daily. Each of the following agents would be appropriate for induction of brief general anesthesia EXCEPT
An obese patient and a lean patient receive halothane for the same duration and at the same inspired tension. Postoperatively, the obese patient would demonstrate
An otherwise healthy 70-year-old man receives 12 units of packed red blood cells for persistent diffuse bleeding during suprapubic prostatectomy. Hemoglobin concentration is 11 g/dL, platelet count is 55,000/mm3, plasma fibrinogen concentration is 180 mg/dL, protime is 14 sec, and partial thromboplastin time is 35 sec. The most appropriate therapy is administration of
During a craniotomy for a supratentorial tumor, a 28-year-old man receives isoflurane 0.75% in nitrous oxide 70% and oxygen. Ventilation is controlled to maintain PaCO2 at 25 mmHg. Nasopharyngeal temperature is 35.8°C. While the dura mater is open, the surgeon complains that the brain is bulging. The most appropriate management at this time is to
A 70-kg, 20-year-old athlete receives nitrous oxide and oxygen, thiopental, and fentanyl 1.25 mg (25 ml) during a knee reconstruction procedure lasting three hours. Postoperatively, he does not awaken or resume spontaneous breathing for three hours. The most likely explanation for the prolonged effect of fentanyl is
Mivacurium-induced neuromuscular blockade is prolonged for the greatest period of time in patients who have which of the following conditions?
A healthy, spontaneously breathing, supine, anesthetized patient has an arterial to end-tidal carbon dioxide tension difference of 3 mmHg. Following institution of mechanical ventilation the value increases to 12 mmHg. The most likely cause of this change is
Severe nausea and vomiting in the PACU is most effectively treated with a drug that acts as an antagonist at which of the following receptors?