With long-term administration, which of the following drugs produces the most prolonged sedative effect of diazepam?
(A) Cimetidine
(B) Famotidine
(C) Metoclopramide
(D) Ranitidine
(E) Warfarin
A
When using apneic oxygenation during endoscopy in a normothermic patient, PaC02
(A) increases at a rate inversely proportional to oxygen flow rate
(B) increases at a rate of 8 + 0.5 mmHg per minute
(C) increases at the same rate that Pa02 decreases
(D) equals mixed venous PC02 after one minute
(E) is increased by airway obstruction
D
During active labor, 10 ml of bupivacaine 0.5% with epinephrine 1:200,000 is administered epidurally. Fifteen minutes later, maternal blood pressure is 70/50 mmHg and heart rate is 70 bpm; fetal heart rate is 90 bpm for 45 seconds, with loss of beat-to-beat variability. The most likely explanation for the fetal vital signs is
As part of a preoperative evaluation, a patient had a thallium scan showing a "cold spot" over the left ventricle that occurs with moderate exercise and disappears at rest. This most likely indicates
A 3-day-old infant is comatose 18 hours after surgical correction of transposition of the great vessels. Tracheal suctioning produces only a tachycardic response. Anesthesia included midazolam 0.5 mg/kg, fentanyl 60 mcg/kg, and pancuronium 0.3 mg/kg. Which of the following is the most appropriate first step in evaluation of this infant?
An infant is delivered by forceps following labor in which variable decelerations were noted. Amniotic fluid was clear. Initial evaluation shows a cyanotic, limp infant with a heart rate of 80 bpm, poor respiratory efforts, and grimacing in response to suctioning. The most appropriate method of resuscitation for this newborn is
(A) vigorous tactile stimulation
(B) bag and mask ventilation with oxygen
(C) immediate endotracheal intubation
(D) administration of sodium bicarbonate 1 mEq/kg
(E) volume expansion with normal saline solution 10 mL/kg
Massive venous air embolism occurs in a patient who is undergoing craniotomy in the sitting position with nitrous oxide, oxygen, fentanyl anesthesia. Which of the following changes in end-tidal (ET) concentrations of carbon dioxide, nitrogen, and nitrous oxide are most likely in this patient? (ETCO2, ETN2, ETN2O)
A 55-kg, 70-year-old woman with mild chronic renal failure is unresponsive 20 hours after an uneventful coronary artery bypass grafting procedure. Anesthetic drugs included fentanyl 3000 mcg, diazepam 35 mg, and pancuronium 20 mg. Which of the following is the most appropriate next step in management?