10 Random Questions
Which of the following best reflects findings of inadequate cerebral perfusion during carotid cross clamping?
- (A) Decreased frequency on EEG
- (B) Increased latency of brain stem auditory evoked potentials
- (C) Increased spectral edge frequency
- (D) Jugular bulb oxygen tension of 27 mmHg
- (E) Stump pressure of 50 mmHg
An elderly man has an acute dissection of the descending thoracic aorta. Which of the following antihypertensive therapies is most likely to extend the dissection?
- (A) Esmolol infusion
- (B) Nitroglycerin infusion
- (C) Nitroprusside infusion
- (D) Nitroprusside infusion combined with a beta-adrenergic blocker
- (E) Trimethaphan infusion
A 57-year-old man who weighs 150 kg and is 170 cm (67 in) tall is scheduled for cholecystectomy. He has a 100 pack-year smoking history. Which of the following findings on pulmonary function testing are most likely?
A 4-month-old child undergoing a craniectomy for craniosynostosis is anesthetized with nitrous oxide and halothane. Suddenly the systolic blood pressure decreases from 75 to 30 mmHg, and the PetCO2 decreases from 35 to 6 mmHg. Which of the following maneuvers is LEAST likely to have a beneficial effect?
- (A) Administration of a fluid bolus
- (B) Administration of a vasopressor
- (C) Application of positive end-expiratory pressure
- (D) Discontinuation of nitrous oxide
- (E) Flooding the surgical wound with saline solution
Brain death following prolonged barbiturate coma is best confirmed by
- (A) electroencephalography
- (B) cerebral angiography
- (C) neurologic examination
- (D) physostigmine trial
- (E) measurement of cortical evoked potentials
Which of the following is most reliable for treatment of cerebral artery vasospasm associated with subarachnoid hemorrhage?
- (A) Antifibrinolytic therapy
- (B) Hyperventilation
- (C) Mannitol infusion
- (D) Nitroprusside infusion
- (E) Volume expansion
After inserting a left-sided double-lumen endotracheal tube, both cuffs are inflated. When the right (tracheal) lumen is clamped, breath sounds are heard only in the lower right lung field. When the left (bronchial) lumen is clamped, breath sounds are heard over the entire left lung field. Where is the tube positioned?
- (A) Tracheal orifice above the carina and bronchial limb in the right bronchus
- (B) Tracheal orifice above the carina and bronchial limb in the left bronchus
- (C) Tracheal orifice and bronchial limb both above the carina
- (D) Tracheal cuff and bronchial limb both in the right bronchus
- (E) Tracheal orifice and bronchial limb both in the left bronchus
A 26-year-old woman is hospitalized in early labor at 38 weeks' gestation. Vaginal bleeding occurred prior to admission. Systemic blood pressure remains 140/80 mmHg during intravenous infusion of fluids. Which of the following factors would contraindicate epidural anesthesia for labor at this time?
- (A) Early fetal heart rate decelerations
- (B) Hematocrit of 29%
- (C) Blood pressure of 110/75 mmHg when sitting
- (D) Platelet count of 100,000/mm3
- (E) Increased respiratory rate
Which of the following complications of caudal anesthesia with 0.25% bupivacaine is more likely in children than in adults?
- (A) Intravascular injection
- (B) Neurotoxicity
- (C) Profound motor block
- (D) Systemic toxicity
- (E) Total spinal block
Block of the superficial cervical plexus is performed at which location?
- (A) At the midposterior border of the sternocleidomastoid muscle
- (B) In the interscalene groove
- (C) Over the mastoid process
- (D) Over the transverse process of C4
- (E) Over Chassaignac's tubercle