A 70-kg, 46-year-old man is undergoing clipping of a cerebral aneurysm with nitrous oxide, opioid, relaxant anesthesia. He is otherwise healthy. As the surgeons are about to enter the dura, the brain is noted to be tense and bulging. Heart rate is 100 bpm and mean arterial pressure is 90 mmHg. PaO2 is 120 mmHg, PaCO2 is 23 mmHg, and pH is 7.50. Which of the following should be done immediately?
(A) Hyperventilation to a PaCO2 of 15 to 20 mmHg
(B) Administration of furosemide 20 mg intravenously
(C) Administration of mannitol 0.5 g/kg
(D) Administration of thiopental 250 mg in increments
Three hours prior to induction of anesthesia for elective laparotomy, a 40-kg 8-year-old boy is anxious and clings to his parents. Which of the following preanesthetic medications is most appropriate?
A 31-year-old man received an uneventful epidural anesthetic for arthroscopy of the knee and meniscectomy. Twenty-four hours later he still has painless flaccid paralysis in both legs. This clinical presentation is most consistent with
A patient with chronic obstructive pulmonary disease is undergoing spinal anesthesia to a T6 sensory level. The most pronounced effect on pulmonary function will be a decrease in