10 Random Questions
A sedative/hypnotic drug is administered prior to electroconvulsive therapy to do which of the following?
- (A) Potentiate the effect of succinylcholine
- (B) Provide amnesia for the electrical stimulus
- (C) Decrease the current required to produce a grand mal seizure
- (D) Increase seizure duration
- (E) Control postictal sympathetic response
Intraoperatively, the occurrence of prominent "a" waves on the central venous pressure waveform can be explained by each of the following EXCEPT
- (A) acute right ventricular failure
- (B) atrial flutter
- (C) complete heart block
- (D) onset of junctional tachycardia
- (E) ventricular pacing
Which of the following decreases dead space in an anesthetic circle system?
- (A) Larger surface area of the expiratory unidirectional valve
- (B) Placing a septum in the Y-piece
- (C) Shorter expiratory limb tubing
- (D) Smaller carbon dioxide absorber
- (E) Smaller reservoir bag
Postoperatively, a patient is being mechanically ventilated by a constant-flow, pressure-cycled ventilator with the following initial settings: inspiratory/expiratory (I/E) ratio of 1:2, peak inspiratory pressure (PIP) of 25 cmH2O, and rate of 10/min. One hour later, the I/E ratio is 1:4. Which of the following would ensure that the minute ventilation is the same as that initially set?
- (A) Inflate the endotracheal tube cuff to prevent leakage
- (B) Double the respiratory rate
- (C) Decrease the expiratory pause until the I/E ratio is 1.0
- (D) Increase the PIP until the I/E ratio is 1:2
- (E) Increase the PIP to 50 cmH20
A celiac plexus block effectively relieves pain at which of the following sites?
- (A) Abdominal viscera above the pelvis
- (B) Parietal peritoneum above the pelvis
- (C) Pelvic parietal peritoneum
- (D) Pelvic viscera
- (E) Visceral pleura
A 58-year-old man with a history of angina is undergoing resection of an abdominal aortic aneurysm under morphine, nitrous oxide, d-tubocurarine anesthesia. Just before removal of the aortic cross-clamp, heart rate is 74 bpm, blood pressure is 115/70 mmHg, and pulmonary artery occlusion pressure is 7 mmHg. Immediately after removal of the cross-clamp, heart rate increases to 120 bpm, blood pressure decreases to 80/55 mmHg, and pulmonary artery occlusion pressure decreases to 3 mmHg. The V5 lead on the EKG demonstrates sudden ST-segment depression and T-wave inversion. Initial therapy should be
- (A) reapplication of the aortic cross-clamp
- (B) intravenous administration of sodium bicarbonate
- (C) initiation of a phenylephrine infusion
- (D) rapid expansion of blood volume by transfusion
- (E) initiation of a nitroglycerin infusion
Which of the following perioperative interventions decreases the risk for renal insufficiency in patients undergoing aortic aneurysm repair?
- (A) Administration of furosemide
- (B) Administration of mannitol
- (C) Administration of renal-dose dopamine
- (D) Epidural anesthesia
- (E) Preoperative volume expansion
In the diagram, point "X" represents a patient with severe left ventricular dysfunction. The points labeled 1, 2, and 3 each represent the results of a different therapeutic intervention. Which of the following represents the most likely intervention at each point?
- (A) 1-Dopamine, 2-Furosemide, 3-Nitroprusside
- (B) 1-Dopamine, 2-Nitroprusside, 3-Furosemide
- (C) 1-Furosemide, 2-Dopamine, 3-Nitroprusside
- (D) 1-Nitroprusside, 2-Dopamine, 3-Furosemide
- (E) 1-Nitroprusside, 2-Furosemide, 3-Dopamine
When performed with identical doses, which of the following types of regional block is associated with the highest plasma concentration of the drug?
- (A) Brachial plexus
- (B) Caudal
- (C) Intercostal
- (D) Subcutaneous infiltration
- (E) Thoracic epidural
Which of the following statements concerning nalbuphine is true?
- (A) It causes partial reversal of morphine-induced ventilatory depression
- (B) Analgesia is partially mediated by delta receptor agonism
- (C) Its antagonist effects are mediated at kappa receptors
- (D) Duration of action is significantly shorter than that of morphine
- (E) Ventilatory drive is not depressed