10 Random Questions
A multiparous 24-year-old woman sustains an amniotic fluid embolism during general anesthesia. The LEAST likely clinical finding is
- (A) increased end-tidal carbon dioxide tension
- (B) increased uterine bleeding
- (C) jugular venous distention
- (D) ST and T wave abnormalities on ECG
- (E) wheezing
Compared with morphine, a single epidural administration of fentanyl is associated with
- (A) delayed onset of analgesia
- (B) increased incidence of pruritus
- (C) increased incidence of respiratory depression
- (D) longer duration of action
- (E) more restricted segmental spread
Which Mapleson breathing circuit shown in the illustration permits the LEAST amount of fresh gas inflow to prevent rebreathing during spontaneous ventilation?
- (A) A
- (B) B
- (C) C
- (D) D
- (E) E
A 14-month-old child has tetralogy of Fallot with dynamic obstruction to right ventricular outflow. Which of the following is most likely to decrease cyanosis in this child?
- (A) Calcium
- (B) Epinephrine
- (C) Nitroglycerin
- (D) Nitroprusside
- (E) Propranolol
A patient is bleeding excessively after routine transurethral resection of the prostate. Re-exploration discloses diffuse oozing. The most appropriate management is administration of
- (A) platelets
- (B) fresh frozen plasma
- (C) desmopressin
- (D) epsilon-aminocaproic acid
- (E) cryoprecipitate
Which of the following muscle relaxants has a prolonged duration of action in a patient who is homozygous for atypical plasma cholinesterase?
- (A) Atracurium
- (B) Doxacurium
- (C) Mivacurium
- (D) Pipecuronium
- (E) Vecuronium
During carotid endarterectomy, blood pressure suddenly decreases from 140/90 to 80/50 mmHg. The EKG shows a heart rate of 42 bpm, with normal sinus rhythm and occasional premature ventricular contractions. The most appropriate therapy is intravenous administration of
- (A) atropine
- (B) epinephrine
- (C) isoproterenol
- (D) lidocaine
- (E) phenylephrine
A 60-kg, 70-year-old man requires open reduction and internal fixation of an intertrochanteric fracture sustained 24 hours ago. Serum creatinine concentration is 1 mg/dl and blood urea nitrogen concentration is 40 mg/dl. The most likely cause of these findings is
- (A) acute tubular necrosis
- (B) chronic renal insufficiency
- (C) dehydration
- (D) obstruction of the bladder outlet
- (E) recent gastrointestinal hemorrhage
An otherwise healthy 20-year-old man undergoes laser surgery for vocal cord polyp removal. During jet ventilation with 100% oxygen, arterial blood gas analysis shows PaO2 90 mmHg, PaCO2 40 mmHg, and pH 7.40. Which of the following is the most likely explanation?
- (A) Aspiration of gastric contents
- (B) Atelectasis
- (C) Pneumothorax
- (D) Pulmonary embolism
- (E) Room air entrainment
A 55-year-old man who is scheduled to undergo carotid endarterectomy (CEA) has a persistent myocardial filling defect at three hours on a dipyridamole-thallium scan. Which of the following statements is correct?
- (A) Coronary autoregulation is effective in this segment
- (B) Coronary revascularization should precede CEA
- (C) Isoflurane is contraindicated
- (D) Myocardial infarction is impending
- (E) There is a segment of nonviable myocardium