In an Infant, spinal anesthesia to a sensory level of T8 is achieved with tetracaine administered at the L2-3 interspace. Compared with spinal anesthesia to the same sensory level in an adult, this anesthetic is associated with a
A 66-year-old woman with essential hypertension has a preoperative blood pressure of 160/95 mmHg despite receiving the usual dose of labetalol on the morning of surgery. Following endotracheal intubation, blood pressure increases to 220/120 mmHg. Which of the following is the most likely explanation?
(A) Decreased arteriolar compliance
(B) Increased circulating blood volume
(C) Increased receptor sensitivity to norepinephrine
Which of the following is LEAST likely to decrease myocardial oxygen supply?
(A) Administration of enflurane
(B) Epidural anesthesia to a sensory level of T6
(C) Increased pulmonary artery occlusion pressure
(D) Hypocarbia (PaCO, 25 mmHg)
(E) Metabolic acidosis (pH 7.20)
E
A patient is bleeding excessively after routine transurethral resection of the prostate. Re-exploration discloses diffuse oozing. The most appropriate management is administration of
A patient receives 1.5% bupivacaine 40 ml and epinephrine 1:200,000 for axillary brachial plexus block for reduction of a forearm fracture. The tourniquet is inflated to 300 mmHg; 45 minutes later, the patient has pain that radiates to the posteromedial elbow. Which of the following nerves is NOT adequately blocked?
A 62-year-old man is scheduled for coronary artery bypass grafting. During induction of anesthesia with fentanyl, high peak inspiratory pressures occur with manual ventilation, and peripheral oxygen saturation decreases from 100% to 94%. The most appropriate management is administration of