10 Random Questions

Equipment & Physics  

Arterial pressure in the radial artery is 155/70 mmHg measured by a correctly calibrated catheter-transducer system. At the same time, aortic pressure is 140/75 mmHg using a high-fidelity catheter tip transducer. The most likely cause of this discrepancy is


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A 66-year-old patient with aortic stenosis is scheduled for aortic valve replacement. Examination shows blood pressure of 110/60 mmHg and sinus rhythm at a rate of 75 bpm. Pulmonary artery occlusion pressure (PAOP) is 20 mmHg with a prominent a-wave on the tracing. Which of the following is the most appropriate management?


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Pediatric  

A 22-year-old woman with severe preeclampsia vaginally delivers a 3-kg infant after 12 hours of treatment with magnesium sulfate and continuous epidural infusion of bupivacaine 0.0625% and fentanyl 1 mcg/ml at 10 ml/hr. The infant is pink and hypotonic; heart rate is 110 bpm and blood pressure is 35/25 mmHg. Which of the following is the most appropriate initial management of the infant?


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Pharmacology & Pharmacokinetics   Pediatric  

A 16-year-old girl is receiving isoflurane, nitrous oxide, oxygen, and pancuronium for insertion of a Harrington rod. In order to perform a "wake-up test" the muscle relaxant was antagonized with neostigmine 2.5 mg and atropine 1 mg. The patient abruptly moved all extremities and was given thiopental 100 mg and succinylcholine 100 mg rapidly. Forty-five minutes later no twitch could be elicited with a nerve stimulator. The most likely explanation is


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Regional & Pain  

In performing a diagnostic left lumbar sympathetic block for lower extremity claudication, the tip of the needle ideally should lie at point

1990a 15

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A programmable DVI pacemaker can be inhibited or inactivated by each of the following EXCEPT


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General  

Each of the following values is associated with acute tubular necrosis EXCEPT


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General  

During transurethral resection of the prostate, intravascular absorption of glycine irrigant most commonly produces


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General  

A 28-year-old patient has severe laryngospasm after extubation of the trachea following general anesthesia. Administration of 100% oxygen using continuous positive airway pressure does not improve symptoms. SpO2 is 75%. Which of the following is the most appropriate immediate management?


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Pediatric  

A delay in surgery for 24 to 48 hours for preoperative stabilization and preparation is acceptable in each of the following neonatal conditions EXCEPT


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