During cardiopulmonary bypass, the perfusionist notes that the mixed venous oxygen saturation has decreased from to 55%. Which of the following is the most likely cause?
(A) Administration of a nitroprusside bolus
(B) Administration of a thiopental bolus
(C) Decrease in rectal temperature from 34°C to 28°C
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 patient receiving propranolol and nifedipine is scheduled for elective coronary artery bypass surgery. During induction with fentanyl and oxygen, heart rate decreases from 52 to 36 bpm and blood pressure decreases from 130/85 to 80/50 mmHg. Administration of atropine 2 mg intravenously has no effect. The most appropriate treatment at this time is administration of
A 75-year-old woman with significant carotid artery stenosis is scheduled for general anesthesia for repair of a fractured hip. Which of the following is the greatest disadvantage of using propofol as an induction agent in this patient?
Failure to block the musculocutaneous nerve adequately during the axillary approach to brachial plexus block will result in inadequate anesthesia of the
(A) thumb and index finger
(B) dorsum of the wrist
(C) lateral aspect of the forearm
(D) lateral aspect of the elbow
(E) medial aspect of the upper arm
C
Immediately following radical prostatectomy, ketorolac administered for analgesia
(A) aggravates ileus and bladder spasm
(B) increases platelet adhesion
(C) is ideally suited for patient-controlled analgesia
(D) mediates its effects via kappa opioid receptors
(E) produces cyclooxygenase inhibition
E
A 69-year-old woman with mitral stenosis and atrial fibrillation is scheduled for mitral valve replacement and removal of a left atrial thrombus. After administration of pancuronium, heart rate increases to 140 bpm and blood pressure decreases to 70/40 mmHg. Which of the following is the LEAST appropriate treatment?