10 Random Questions
Metoclopramide
- (A) decreases gastric acid secretion
- (B) decreases gastroesophageal sphincter tone
- (C) is contraindicated in patients with Parkinson's disease
- (D) is most effective when administered in combination with atropine
- (E) requires an intact vagus nerve for gastrointestinal effects
A 55-year-old man who is scheduled to undergo carotid endarterectomy (CEA) has a persistent myocardial filling defect at three hours on a dipyridamole-thallium scan. Which of the following statements is correct?
- (A) Coronary autoregulation is effective in this segment
- (B) Coronary revascularization should precede CEA
- (C) Isoflurane is contraindicated
- (D) Myocardial infarction is impending
- (E) There is a segment of nonviable myocardium
A patient receives remifentanil 25 mcg just before retrobulbar block with 0.25% bupivacaine 4 mL. Over the next 10 minutes, he develops apnea and loses consciousness. Which of the following is the most likely explanation?
- (A) Effects of remifentanil
- (B) Injection of local anesthetic into cerebrospinal fluid
- (C) Intravascular injection of local anesthetic
- (D) Oculocardiac reflex
- (E) Systemic absorption of local anesthetic
A pulmonary artery catheter is placed in an awake patient breathing room air. Typical right ventricular and pulmonary artery pressure tracings are obtained. With the catheter balloon inflated, blood drawn from the distal port has a PaO2 of 100 mmHg, while a simultaneous radial artery sample has a PaO2 of 90 mmHg. These data indicate that the
- (A) shunt fraction is greater than 10%
- (B) catheter is in the wedged position
- (C) catheter has entered a pulmonary vein
- (D) cardiac output is abnormally high
- (E) oxygen electrode is malfunctioning
Fresh frozen plasma is indicated in each of the following situations EXCEPT
- (A) after rapid transfusion of 1.5 L CPD-stored red blood cells
- (B) antithrombin III deficiency
- (C) replacement of factor VIII
- (D) reversal of warfarin effect
- (E) thrombotic thrombocytopenic purpura
A 32-year-old patient with end-stage renal failure has irreversible neuromuscular blockade two hours after tracheal intubation with a muscle relaxant. Which of the following is the most likely cause?
- (A) Atracurium
- (B) Doxacurium
- (C) Mivacurium
- (D) Pancuronium
- (E) Vecuronium
Transcutaneous electrical nerve stimulation is LEAST likely to be effective in which of the following pain syndromes?
- (A) Acute postoperative pain
- (B) Chronic pancreatitis
- (C) Myofascial syndrome
- (D) Phantom limb pain
- (E) Reflex sympathetic dystrophy
Each of the following landmarks is used in performing wrist block to remove a cystic mass on the fourth digit EXCEPT the
- (A) extensor pollicis longus tendon
- (B) ulnar artery
- (C) palmaris longus tendon
- (D) flexor carpi radialis tendon
- (E) flexor carpi ulnaris tendon
Which of the following statements best describes testing for susceptibility to malignant hyperthermia (MH)?
- (A) Live skeletal muscle cells are required for testing
- (B) The MH gene is located on the X chromosome
- (C) Muscle biopsy is appropriate in children younger than 1 year
- (D) A normal serum creatine phosphokinase concentration eliminates the need for muscle biopsy
- (E) Succinylcholine is used to stimulate muscle obtained on biopsy for MH
The ECG tracing shows
- (A) aberrant intraventricular conduction
- (B) acceleration of phase 4 depolarization of the sinus node
- (C) a compensatory pause
- (D) initiation of re-entrant supraventricular tachycardia
- (E) paroxysmal atrial fibrillation