10 Random Questions
Prilocaine is NOT recommended for obstetric regional anesthesia because it
- (A) causes fetal methemoglobinemia
- (B) has a very short duration of action
- (C) is not metabolized by the newborn
- (D) is the most toxic of the amide local anesthetics
- (E) produces a longer motor block than sensory block
Which of the lines shown in the graph illustrates the relationship of hematocrit and oxygen transport?
- (A) Line A
- (B) Line B
- (C) Line C
- (D) Line D
- (E) Line E
A 45-year-old man is scheduled for appendectomy under general anesthesia. He reports that for many years he has occasionally felt his heart "skip a beat." The ECG tracing shown was obtained one hour ago. Which of the following is the most appropriate next step?
- (A) Proceeding with induction of anesthesia
- (B) Administration of a loading dose of digoxin
- (C) Carotid sinus massage
- (D) Intravenous administration of atropine
- (E) Placement of a temporary pacemaker
During isoflurane anesthesia, a 45-year-old patient with chronic asthma has wheezing, prolonged expiration, sinus tachycardia of 120 bpm, and premature ventricular contractions. Preoperative medication included cromolyn and theophylline (serum level 20 jag/ml). The most appropriate treatment is to administer
- (A) albuterol aerosol
- (B) aminophylline by intravenous infusion
- (C) cromolyn aerosol
- (D) halothane
- (E) hydrocortisone by intravenous bolus
Which of the following laboratory studies is the best indicator of reversal of the effects of warfarin?
- (A) Activated clotting time
- (B) Activated partial thromboplastin time
- (C) Bleeding time
- (D) Plasma fibrinogen concentration
- (E) Prothrombin time
After tracheal extubation, a healthy 21-year-old man has a 30-second episode of laryngospasm with marked intercostal and sternal retractions, which are corrected with continuous positive airway pressure administered by mask. He now has dyspnea and tachypnea, and a roentgenogram of the chest shows diffuse bilateral interstitial edema. The most likely cause is increased
- (A) airway reactivity
- (B) intrapleural pressure
- (C) left ventricular afterload
- (D) right ventricular preload
- (E) transpulmonary vascular pressure
Compared with adults, neonates are more likely to become hypoxemic following anesthesia and extubation because of a relatively
- (A) higher rate of oxygen consumption
- (B) greater sensitivity to neuromuscular blockade
- (C) larger Vd/Vt ratio
- (D) lower blood pressure
- (E) smaller functional residual capacity
On routine inspection of an anesthesia machine, the nitrous oxide E cylinder pressure is 360 psi. This indicates that the
- (A) pressure in the cylinder is 16 atm
- (B) cylinder contains no liquid nitrous oxide
- (C) cylinder is half full
- (D) cylinder contains enough nitrous oxide for one hour of anesthesia at a flow rate of 3 L/min
- (E) reducing valve is malfunctioning
Retrobulbar block for ophthalmologic surgery can be administered safely to patients with which of the following conditions?
- (A) Agitation
- (B) Bleeding disorder
- (C) Frequent coughing spasms
- (D) Increased intraocular pressure
- (E) Perforated globe
Compared with halothane, desflurane has which of the following characteristics?
- (A) Greater potency
- (B) A higher boiling point
- (C) Increased blood solubility
- (D) Less airway irritability
- (E) Less biodegradation