During frontal craniotomy for removal of an astrocytoma, the surgeon notes that the brain is "tight." The patient is receiving nitrous oxide 50% in oxygen, isoflurane 0.5%, fentanyl, and pancuronium. Heart rate is 92 bpm, blood pressure is 110/60 mmHg, end-tidal carbon dioxide tension is 31 mmHg, and oxygen saturation is 98%. The most appropriate initial treatment is to
(A) administer a beta-adrenergic blocker
(B) administer thiopental
(C) decrease isoflurane concentration
(D) decrease mean arterial pressure to 60 mmHg
(E) increase alveolar ventilation
E
Which of the following remains normal in an otherwise healthy patient with obesity?
A 34-year-old man has hyperkalemia-induced asystole. After initiating cardiopulmonary resuscitation, which of the following is the most appropriate next step in management?
(A) Administration of atropine
(B) Administration of calcium chloride
(C) Administration of sodium bicarbonate
(D) Transcutaneous pacing
(E) DC countershock at 200 joules
B
Failure of contrast material to enter the duodenum following intraoperative cholangiography is most likely related to administration of
(A) butorphanol
(B) fentanyl
(C) halothane
(D) nalbuphine
(E) naloxone
B
A 19-year-old woman has severe nausea and vomiting following laparoscopy. After intramuscular administration of prochlorperazine 10 mg, she has muscle spasms in the face, neck, and tongue. Which of the following is the most appropriate management?