A 50-year-old patient is undergoing craniotomy for clipping of a cerebral aneurysm with isoflurane, nitrous oxide, and fentanyl anesthesia. At the time of aneurysm exposure, the EEG shows burst suppression. Which of the following is the most likely cause?
A 68-year-old man has a permanent DVI pacemaker that has been functioning appropriately. Which of the following is most likely to cause conversion to VOO pacing?
(A) Electroconvulsive therapy
(B) Insertion of a pulmonary artery catheter
(C) Placement of a magnet over the pulse generator
A patient who is scheduled for a parathyroidectomy for a parathyroid adenoma has a preoperative serum calcium concentration of 13.5 mg/dl. The ECG shows no acute changes. The most appropriate preoperative management is administration of
(A) calcitonin
(B) hydrocortisone
(C) intravenous saline solution
(D) mannitol
(E) potassium phosphate
C
A parturient received 1000 ml of dextrose 5% in lactated Ringer's solution 20 minutes prior to delivery. Ten minutes later her blood glucose concentration is 580 mg/dl. In this situation
(A) the risk for fetal intraventricular hemorrhage is increased
(B) the risk for neonatal hypoglycemia is increased
(C) placental glucose transport is insulin dependent
(D) the neonate should be given dextrose 50% in water if depressed at delivery
(E) the mother should be given insulin prior to delivery
Immediately after a retrobulbar block for cataract surgery, the eye grossly protrudes and the patient has the sensation of pressure in the eye. The most appropriate initial intervention is
Which of the following changes in pulmonary function best explains the more rapid rate of rise of alveolar concentration of volatile anesthetics in pregnant women than in nonpregnant women?