Prolonged respiratory depression following administration of morphine is more likely in patients with chronic renal faillure than in patients with normal kidney function because of
A 22-year-old woman with preeclampsia has undergone emergency cesarean delivery during general anesthesia. At the completion of the surgery, attempts at reversal of vecuronium are unsuccessful. Each of the following could be a cause of this failure EXCEPT
(A) hypoalbuminemia
(B) hypothermia
(C) perioperative administration of gentamicin
(D) perioperative administration of magnesium sulfate
(E) respiratory acidosis
A
A rapid shallow ventilatory pattern is most energy efficient for a patient who
(A) has a low ratio of forced expiratory volume in one second to vital capacity (FEV^VC)
(B) has a high ratio of tidal volume to vital capacity, and diminished vital capacity
(C) has increased pulmonary compliance
(D) is using the accessory muscles of respiration
(E) has increased airway resistance
B
Which of the following statements concerning the effects of glycopyrrolate is true?
(A) It decreases gastric pH
(B) It causes bronchoconstriction
(C) It decreases lower esophageal sphincter tone
(D) It does not prevent succinylcholine-induced bradycardia
After brachial plexus block via an axillary approach, a patient has sensation on the dorsum of the second and third digits and is able to extend the distal phalanx of the thumb. To block the unaffected nerve, anesthetic should be injected at which of the following sites?
(A) 2 Cm lateral to the biceps tendon at the level of the elbow
(B) At the radial border of the palmaris longus tendon
(C) Between the medial epicondyle and the olecranon
(D) Between the radial artery and the styloid process
(E) Just medial to the brachial artery at the elbow
A
Forty-eight hours after thoracotomy, a patient's T6-7 epidural catheter is removed and the distal 2 cm is noted to be missing. The patient felt no pain during removal and neurologic examination shows no abnormalities. After informing the patient, which of the following is the most appropriate next step in management?
Preoperative evaluation shows a serum sodium concentration of 140 mEq/L, serum chloride concentration of 90 mEq/L, PaCO2 of 46 mmHg, and arterial pH of 7.50. These findings are most indicative of prior treatment with