Which of the following is more likely to occur with use of trimethaphan to induce hypotension than with use of nitroprusside?
(A) A predictable decrease in mean arterial pressure
(B) Increased mixed venous P02
(C) Increased serum lactate concentration
(D) Mydriasis
(E) Reflex tachycardia
D
A 75-year-old man with aortic stenosis and coronary artery disease has a preinduction heart rate of 68 bpm and blood pressure of 125/70 mmHg. After induction of anesthesia with fentanyl, midazolam, and pancuronium, heart rate is 90 bpm and blood pressure is 85/45 mmHg. ECG shows a new ST-segment elevation in lead II. Which of the following is the most appropriate initial management?
Which of the following statements concerning use of temperature-corrected blood gas measurement (pH-stat) during hypothermic cardiopulmonary bypass is true?
(A) Blood gas analysis is performed at the patient's temperature
(B) Carbon dioxide should not be added to the bypass circuit
(C) The carbon dioxide content of the patient's blood is greater than it would be without temperature correction
(D) The incidence of postoperative neurologic deficits is increased compared with the alpha-stat method
(E) The patient's temperature should be maintained above 25°C
During an otherwise uneventful nitrous oxide-sevoflurane anesthetic in a spontaneously breathing patient, 85% nitrous oxide is accidently administered, resulting in a PO2 of 48 mmHg. Which of the following would be expected?
Which of the following is most likely to occur during mediastinoscopy?
(A) Chylothorax
(B) Compression of the innominate artery
(C) Injury to the superior laryngeal nerve
(D) Tracheal tear
(E) Venous air embolism
B
Preoperative parenteral administration of vitamin K is LEAST likely to decrease a prolonged prothrombin time in a patient with
(A) end-stage hepatocellular disease
(B) malabsorption associated with ulcerative colitis
(C) obstructive jaundice
(D) long-term antibiotic therapy
(E) warfarin-induced prothrombin deficiency
A
In a patient with ventricular fibrillation refractory to repeated attempts at defibrillation and epinephrine administration, the most appropriate management is administration of
A 65-year-old man is disoriented and has a headache and nausea in the recovery room 30 minutes after transurethral resection of the prostate with glycine irrigation performed under spinal anesthesia. Heart rate is 50 bpm and blood pressure is 180/110 mmHg. Which of the following is LEAST likely?
A 35-year-old woman with severe myasthenia gravis is scheduled for thymectomy. Which of the following preoperative pulmonary function tests is most likely to be normal?