After brachial plexus block, a patient has sensation over the inner aspect of the upper arm. Block of which of the following nerves would obtund this sensation?
A 20-year-old man is scheduled for emergency laparotomy for an abdominal stab wound. Ten minutes after induction with oxygen, thiopental, and succinylcholine, blood pressure is 220/120 mmHg and esophageal temperature is 39°C. ST-segment depression of 4 mm is noted in ECG lead V5. Which of the following is the most likely cause?
(A) Adrenal laceration
(B) Cocaine intoxication
(C) Inadequate anesthesia
(D) Malignant hyperthermia
(E) Small cardiac puncture
B
Pulmonary artery diastolic pressure increases acutely from 10 to 20 mmHg in a 28-year-old man undergoing cervical laminectomy in the sitting position. The most appropriate first step in the management of this patient is to
(A) administer furosemide
(B) aspirate from the proximal port of the pulmonary artery catheter
(C) inflate the balloon on the pulmonary artery catheter
(D) place the patient in the left lateral decubitus position
(E) start an infusion of nitroglycerin
B
Tingling in the fifth finger during spinal anesthesia is associated with anesthesia at which of the following dermatomes?
A 68-year-old man with severe depression is scheduled for electroconvulsive therapy. He had a myocardial infarction two years ago and continues to have angina on exertion. Pretreatment with which of the following drugs is most likely to maintain stability during the procedure?
(A) Esmolol
(B) Fentanyl
(C) Hydralazine
(D) Lidocaine
(E) Midazolam
A
Six hours after coronary artery bypass grafting, a pulmonary artery catheter oximeter shows a mixed venous hemoglobin oxygen saturation of 50%. This value may result from each of the following EXCEPT