10 Random Questions
Which of the following correctly describes the anatomic location of the stellate ganglion?
- (A) Anterior to the transverse process of C5
- (B) Anterior to the transverse process of C7
- (C) Posterior to the prevertebral fascia
- (D) Posterior to the vertebral artery
- (E) Lateral to the carotid artery
In a patient who is breathing spontaneously, the work of breathing increases with each of the following EXCEPT
- (A) decreased compliance
- (B) decreased vital capacity
- (C) increased carbon dioxide production
- (D) increased respiratory rate
- (E) increased dead space
Anesthesia is induced with halothane in a 3-year-old girl. Sixty seconds after administration of succinylcholine 1 mg/kg intravenously, heart rate decreases rapidly from 120 to 60 bpm. The most likely cause is
- (A) acute hyperkalemia
- (B) failure to pretreat with a nondepolarizing relaxant
- (C) halothane overdose
- (D) muscarinic activity
- (E) sympathetic ganglionic blockade
One hour after an open cholecystectomy, a 42-year-old patient is hemodynamically stable and breathing spontaneously (rate 10/min and regular) at an FiO2 of 0.4. Fentanyl, isoflurane, nitrous oxide, and pancuronium were used during the procedure. Analysis of arterial blood gases (pH, pCO2, pO2) is most likely to show:
- (A) 7.18 40 100
- (B) 7.18 60 140
- (C) 7.28 50 85
- (D) 7.40 26 220
- (E) 7.40 40 40
Postoperatively a 70-kg patient has a serum sodium value of 130 mEq/L. To increase this value to 140 mEq/L would require the administration of how much sodium in mEq?
- (A) 140
- (B) 250
- (C) 420
- (D) 600
- (E) 740
Monitoring sensory evoked potentials may be useful in detecting functional derangement of each of the following EXCEPT
- (A) cranial nerve pathways during posterior fossa operations
- (B) motor pathways during anterior cervical discectomy
- (C) dorsal column pathways during operations for spinal tumors
- (D) visual pathways during operations on the sphenoid wing
- (E) cortical pathways during carotid artery operations
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
Which of the following relationships is indicated by the curve illustrated in the graph shown?
- (A) Intracranial blood volume (X) and intracranial pressure (Y)
- (B) PaCO2 (X) and minute ventilation (Y)
- (C) PaO2 (X) and hemoglobin saturation (Y)
- (D) Preload (X) and stroke volume (Y)
- (E) Systemic arterial pressure (X) and cerebral blood flow (Y)
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
During frontal craniotomy for removal of an astrocytoma, the surgeon notes that the brain is "tight." The patient is receiving nitrous oxide 50% in oxygen, isoflurane 0.5%, fentanyl, and pancuronium. Heart rate is 92 bpm, blood pressure is 110/60 mmHg, end-tidal carbon dioxide tension is 31 mmHg, and oxygen saturation is 98%. The most appropriate initial treatment is to
- (A) administer a beta-adrenergic blocker
- (B) administer thiopental
- (C) decrease isoflurane concentration
- (D) decrease mean arterial pressure to 60 mmHg
- (E) increase alveolar ventilation