10 Random Questions
A 67-year-old man undergoes spinal anesthesia with hyperbaric tetracaine 10 mg for transurethral resection of the prostate. At the end of the 50-minute procedure, the level of anesthesia is T6 and blood pressure is 120/70 mmHg. Within two minutes after transfer to a stretcher, the patient has nausea and blood pressure decreases to 76/42 mmHg. Which of the following is the most likely cause of the acute hypotension?
- (A) Acute congestive heart failure
- (B) Decreased venous return
- (C) Dilutional hyponatremia
- (D) Progression of sympathetic block
- (E) Unrecognized bladder perforation
A patient with cirrhosis presenting for liver transplantation is likely to exhibit each of the following EXCEPT
- (A) decreased cardiac output
- (B) decreased serum glucose concentration (0 decreased serum sodium concentration
- (D) decreased systemic vascular resistance
- (E) increased alveolar-arterial oxygen tension difference
A 66-year-old man with chronic obstructive pulmonary disease who underwent colectomy 12 hours ago has been receiving an epidural infusion of fentanyl at a rate of 100 mcg/hr. Which of the following is LEAST likely to develop?
- (A) Hypotension
- (B) Nausea
- (C) Pruritus
- (D) Respiratory depression
- (E) Urinary retention
Which of the following additives accelerates the onset of lidocaine axillary block without shortening duration?
- (A) Carbon dioxide
- (B) Dextran
- (C) Dextrose
- (D) Epinephrine
- (E) Hyaluronidase
A woman is in labor at 40 weeks' gestation and the fetus is in breech presentation. Which of the following will provide adequate uterine relaxation for vaginal delivery?
- (A) Spinal anesthesia
- (B) Epidural anesthesia
- (C) Halothane anesthesia
- (D) Pudendal nerve block
- (E) Magnesium sulfate
Which of the following factors is the LEAST important determinant of postdural puncture headache?
- (A) Age of the patient
- (B) Gauge of the spinal needle
- (C) Gender of the patient
- (D) Pregnancy
- (E) Time until ambulation
Which of the following is most responsible for the duration of action of local anesthetics?
- (A) Concentration
- (B) Metabolism
- (C) Molecular weight
- (D) Tissue protein binding
- (E) Volume injected
During application of continuous positive airway pressure, lung compliance increases because of
- (A) decreased airway resistance
- (B) decreased lung water
- (C) decreased venous return
- (D) increased intercostal muscle tone
- (E) increased resting lung volume
During induced hypotension for clipping of a cerebral aneurysm in a 20-degree head-up position, the arterial pressure transducer should be zero referenced at which level?
- (A) External auditory meatus
- (B) Midaxillary line at the fifth intercostal space
- (C) Sternal notch
- (D) Thyroid cartilage
- (E) Top of the cranium
The illustration depicts flow-volume loops for the same person at two different times in his life. Which of the following is indicated by the dotted loop?
- (A) Bronchial tumor
- (B) Chronic asthmatic bronchitis
- (C) Morbid obesity
- (D) Paralysis of a vocal cord
- (E) Subglottic stenosis