10 Random Questions
Which of the following statements best describes testing for susceptibility to malignant hyperthermia (MH)?
- (A) Live skeletal muscle cells are required for testing
- (B) The MH gene is located on the X chromosome
- (C) Muscle biopsy is appropriate in children younger than 1 year
- (D) A normal serum creatine phosphokinase concentration eliminates the need for muscle biopsy
- (E) Succinylcholine is used to stimulate muscle obtained on biopsy for MH
In pregnant patients, which of the following is an effect of the long-term use of cocaine?
- (A) Decreased uterine tone
- (B) Decreased thiopental requirement
- (C) Increased isoflurane MAC
- (D) Increased sensitivity to ephedrine
- (E) Lower than expected level of block with tetracaine spinal analgesia
The hemodynamic changes shown would most likely result from infusion of
- (A) dopamine
- (B) epinepherine
- (C) dobutamine
- (D) norepinepherine
- (E) isoproterenol
Following cardiopulmonary bypass, right ventricular distention is noted after infusion of protamine 40 mg. Pulmonary artery pressure has increased from 25/18 to 50/30 mmHg and systemic arterial pressure has decreased from 110/65 to 0 mmHg. Which of the following is the most appropriate treatment?
- (A) Administration of amrinone
- (B) Administration of nitroglycerin
- (C) Administration of phenylephrine
- (D) Initiation of intra-aortic balloon pump assist
- (E) Reheparinization and resumption of cardiopulmonary bypass
Which of the following statements concerning nalbuphine is true?
- (A) It causes partial reversal of morphine-induced ventilatory depression
- (B) Analgesia is partially mediated by delta receptor agonism
- (C) Its antagonist effects are mediated at kappa receptors
- (D) Duration of action is significantly shorter than that of morphine
- (E) Ventilatory drive is not depressed
The Mapleson A system (Magill circuit) illustrated
- (A) is functionally equivalent to the Bain circuit
- (B) prevents rebreathing more effectively during controlled ventilation than during spontaneous ventilation
- (C) provides better humidification than the Mapleson D system
- (D) requires a fresh gas flow equal to minute ventilation to prevent rebreathing during spontaneous ventilation
- (E) results in less rebreathing during controlled ventilation than the Mapleson C system
A patient with a fasting blood glucose concentration of 100 mg/dL undergoes a four-hour operation under general anesthesia without intraoperative administration of glucose. On emergence the most likely finding will be
- (A) marked hypoglycemia
- (B) mild hypoglycemia
- (C) normoglycemia
- (D) mild hyperglycemia
- (E) marked hyperglycemia
Cardiac output measured by thermodilution with a pulmonary artery catheter most accurately reflects systemic blood flow in a patient with
- (A) aortic regurgitation
- (B) atrial septal defect
- (C) patent ductus arteriosus
- (D) tricuspid insufficiency
- (E) ventricular septal defect
A 62-year-old patient undergoes resection of a descending thoracic aneurysm under anesthesia with morphine, nitrous oxide, oxygen, and pancuronium. In spite of normal somatosensory evoked potentials (SSEP) during the procedure, the patient has paraplegia postoperatively. The factor most likely responsible for failure to note the deficit intraoperatively is
- (A) the effect of nitrous oxide on SSEP
- (B) the effect of morphine on SSEP
- (C) failure to test motor pathways
- (D) hyperventilation to a PaC02 of 30 mmHg
- (E) unintentional hypothermia to 34°C
In a patient with peripheral vascular disease, the most likely result of lumbar sympathetic block is
- (A) increased blood flow to skin and decreased blood flow to muscle
- (B) increased blood flow to skin and unchanged blood flow to muscle
- (C) increased blood flow to skin and muscle
- (D) decreased blood flow to skin and muscle
- (E) decreased blood flow to skin and unchanged blood flow to muscle