10 Random Questions
Which of the following processes is primarily responsible for the decrease in core body temperature that occurs during the first hour of general anesthesia?
- (A) Decreased production of heat
- (B) Convective heat loss caused by cutaneous vasodilation
- (C) Evaporative heat loss during skin preparation
- (D) Heat loss from the respiratory tract
- (E) Redistribution of core body heat to the periphery
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
Which of the following postoperative treatments decreases the risk for deep venous thrombosis?
- (A) Blood transfusion
- (B) Epidural anesthesia
- (C) Etomidate
- (D) Ketorolac
- (E) Patient-controlled analgesia
A 68-year-old man has a permanent DVI pacemaker that has been functioning appropriately. Which of the following is most likely to cause conversion to VOO pacing?
- (A) Electroconvulsive therapy
- (B) Insertion of a pulmonary artery catheter
- (C) Placement of a magnet over the pulse generator
- (D) Use of electrocautery near the pacemaker
- (E) Shivering
Which of the following is a known effect of propofol?
- (A) Decreased amplitude of somatosensory evoked potentials
- (B) Induction of malignant hyperthermia
- (C) Inhibition of cytochrome P450
- (D) Initiation of porphyria
- (E) Suppression of adrenocortical function
The tracing indicates that the pacemaker generator is
- (A) malfunctioning
- (B) VVT sensing and capturing normally
- (C) VOO sensing and capturing normally
- (D) DVI sensing and capturing normally
- (E) VVI sensing and capturing normally
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
Which of the following statements concerning use of temperature-corrected blood gas measurement (pH-stat) during hypothermic cardiopulmonary bypass is true?
- (A) Blood gas analysis is performed at the patient's temperature
- (B) Carbon dioxide should not be added to the bypass circuit
- (C) The carbon dioxide content of the patient's blood is greater than it would be without temperature correction
- (D) The incidence of postoperative neurologic deficits is increased compared with the alpha-stat method
- (E) The patient's temperature should be maintained above 25°C
A 38-year-old woman with B-positive blood requires immediate blood transfusion during abdominal hysterectomy. No B-positive blood is available; O-negative blood is used. Three minutes after starting transfusion of packed red blood cells, the patient develops tachycardia, bronchospasm, and hypotension. Which of the following is the most likely cause?
- (A) Anaphylactic reaction to donor IgA
- (B) Bacterial contamination of transfused blood
- (C) Hemolysis resulting from ABO incompatibility
- (D) Hypocalcemia
- (E) IgG-mediated reaction to Rh antigens
An 18-year-old patient with hemophilia A is scheduled for inguinal hernia repair. Preoperatively, factor VIII concentration is 60% of normal. The most appropriate management is administration of
- (A) fresh frozen plasma
- (B) cryoprecipitate
- (C) factor VIII concentrate
- (D) vitamin K
- (E) none of the above