10 Random Questions
During induction of anesthesia for cesarean delivery, pancuronium is inadvertently substituted for succinylcholine. The neonate shows no clinical signs of muscle relaxation because pancuronium is
- (A) highly ionized
- (B) highly protein bound
- (C) a large molecule
- (D) lipid soluble
- (E) unaffected by "ion trapping"
The EEG begins to flatten during carotid endarterectomy when regional cerebral blood flow (in ml/min/100 g brain) decreases to
- (A) 55
- (B) 45
- (C) 30
- (D) 20
- (E) 10
A conscious patient has an acute subdural hematoma that will require surgical evacuation. Which of the following interventions to be carried out in the emergency department is most likely to decrease intracranial pressure?
- (A) Having the patient hyperventilate
- (B) Intravenous administration of an opioid
- (C) Intravenous administration of a corticosteroid
- (D) Intravenous administration of nitroprusside
- (E) Intravenous administration of furosemide
A 54-year-old woman who is scheduled to undergo emergency exploratory laparotomy takes warfarin sodium for anticoagulation. Prothrombin time is 19 sec (control 12 sec). Which of the following agents is most appropriate to reverse the effects of warfarin?
- (A) Cryoprecipitate
- (B) Desmopressin (DDAVP)
- (C) Factor IX concentrate
- (D) Fresh frozen plasma
- (E) Pooled factor VIII
The plasma concentration of an intravenously administered drug follows the two-compartment kinetic model shown in the graph. Which of the following events is illustrated by the decline in plasma concentration shown at Time #2?
- (A) Decreasing activity of the drug at its receptor site
- (B) Distribution from plasma to tissue
- (C) Elimination of the drug from plasma
- (D) Increasing volume of distribution
- (E) Redistribution from vessel-rich groups to vessel-poor groups
Volume-cycled flow generators are preferred over pressure-cycled ventilators in critical care units because they
- (A) have a lower compression volume
- (B) limit peak airway pressure
- (C) maintain constant ventilatory volume with changes in lung compliance
- (D) more readily compensate for gas leaks
- (E) permit more accurate measurement of the patient's minute volume
After inserting a left-sided double-lumen endotracheal tube, both cuffs are inflated. When the right (tracheal) lumen is clamped, breath sounds are heard only in the lower right lung field. When the left (bronchial) lumen is clamped, breath sounds are heard over the entire left lung field. Where is the tube positioned?
- (A) Tracheal orifice above the carina and bronchial limb in the right bronchus
- (B) Tracheal orifice above the carina and bronchial limb in the left bronchus
- (C) Tracheal orifice and bronchial limb both above the carina
- (D) Tracheal cuff and bronchial limb both in the right bronchus
- (E) Tracheal orifice and bronchial limb both in the left bronchus
A patient suddenly makes a respiratory effort during craniotomy for clipping of a cerebral aneurysm in a 15-degree head-up position with controlled ventilation. The most likely cause is
- (A) air embolism
- (B) cerebral hypoxia
- (C) direct stimulation of the respiratory center
- (D) intraventricular hemorrhage
- (E) stimulation of the motor cortex
The two E oxygen cylinders on an anesthesia machine have pressure readings of 1100 psi each. At an oxygen flow of 3 L/min, there will be sufficient oxygen for approximately
- (A) 2.5 hours
- (B) 3.5 hours
- (C) 5.5 hours
- (D) 7 hours
- (E) 8 hours
Which of the following is true of both the neonatal and adult airways?
- (A) Epiglottic innervation is primarily vagal
- (B) Sniffing position requires placement of a pillow under the occiput
- (C) The cricoid ring is the narrowest part of the airway
- (D) The epiglottis has a relatively similar size and shape
- (E) The glottis is located at C3-4