10 Random Questions
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
Hypothermia to 29°C will decrease
- (A) hematocrit
- (B) plasma fibrinogen concentration
- (C) plasma pH
- (D) plasma protein concentration
- (E) platelet function
A patient is undergoing exploration of a stab wound to the left side of the neck. On awake laryngoscopy, the left vocal cord is in midposition and the right vocal cord is abducted during inspiration. The most likely cause of these findings is trauma to which of the following structures on the left?
- (A) C7-8 nerve root
- (B) Stellate ganglion
- (C) Glossopharyngeal nerve
- (D) Superior laryngeal nerve
- (E) Vagus nerve
Coughing that occurs during awake intubation is prevented by local anesthetic block of which of the following nerves?
- (A) Glossopharyngeal
- (B) Hypoglossal
- (C) Recurrent laryngeal and glossopharyngeal
- (D) Recurrent laryngeal and superior laryngeal
- (E) Superior laryngeal and glossopharyngeal
A patient who had liver transplantation two years ago now requires general anesthesia for ENT surgery. Minimal rejection has occurred on a regimen of cyclosporine and prednisone. Which of the following is most likely?
- (A) Hypoalbuminemia
- (B) Hypocalcemia
- (C) Episodic hypoglycemia
- (D) Increased serum creatinine concentration
- (E) Prolonged prothrombin time
A 50-year-old patient is undergoing craniotomy for clipping of a cerebral aneurysm with isoflurane, nitrous oxide, and fentanyl anesthesia. At the time of aneurysm exposure, the EEG shows burst suppression. Which of the following is the most likely cause?
- (A) Cerebral ischemia
- (B) Cerebral vasospasm
- (C) Fentanyl effect
- (D) Isoflurane effect
- (E) Petit mal seizure activity
One hundred children who are to have strabismus surgery are enrolled in a research protocol. Fifty receive a new antiemetic and 50 receive a placebo preoperatively. Fifteen children in the treatment group and 37 children in the control group have nausea and vomiting postoperatively. Which of the following analyses is most appropriate for determining the statistical significance of the group differences?
- (A) Analysis of variance
- (B) Chi-square analysis
- (C) Linear regression and correlation coefficient
- (D) Student's t-test
- (E) Wilcoxon's rank sum test
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
Following transfusion of packed red blood cells during general anesthesia, the patient's blood pressure decreases, heart rate and temperature increase, and hemoglobinuria and diffuse oozing are observed. Which of the following is the most appropriate first step in management?
- (A) Administration of hydrocortisone
- (B) Administration of fresh frozen plasma
- (C) Administration of epsilon-aminocaproic acid
- (D) Rapid infusion of crystalloid
- (E) Transfusion of platelet concentrates
During laparotomy for a ruptured spleen, unexplained oozing occurs after infusion of 2 liters of crystalloid and 3 units of blood. The most likely cause is
- (A) citrate toxicity
- (B) dilutional thrombocytopenia
- (C) hemolytic transfusion reaction
- (D) labile clotting factor deficiency
- (E) leukoagglutinin reaction