10 Random Questions


If the oxygen supply pressure of an anesthesia machine exceeds a set value, which of the following safety devices maintains a constant oxygen flowmeter output?


Which of the following is the best initial treatment of anaphylaxis that occurs during general anesthesia?

BASIC Pharmacology & Pharmacokinetics General

The test dose of local anesthetic administered through an epidural needle or catheter should be sufficient to produce

BASIC OB Regional & Pain

The hemodynamic changes shown would most likely result from infusion of

BASIC Respiratory & Critical Care Pharmacology & Pharmacokinetics

An endobronchial Robertshaw tube is inserted for resection of a midesophageal tumor under isoflurane, oxygen, pancuronium anesthesia. Forty minutes into a planned two-hour resection, arterial blood gas values are reported as PO2 45 mmHg, PCO2 45 mmHg, and pH 7.33. Ten minutes earlier, the values were PO2 210 mmHg, PCO2, 41 mmHg, and pH 7.39. The first action should be to

ADVANCED General

A 62-year-old man is in the intensive care unit after successful craniotomy for excision of a meningioma. Blood volume is normal; laboratory studies show serum sodium concentration of 120 mEq/L, serum osmolality of 260 mOsm/L, urine sodium concentration of 50 mEq/L, and urine osmolality of 820 mOsm/L. Which of the following is the most likely explanation?

ADVANCED Neuro

Alveolar and inspired anesthetic concentrations equilibrate more rapidly with nitrous oxide than with desflurane because nitrous oxide

BASIC Pharmacology & Pharmacokinetics

A 68-year-old man with stable angina treated with propranolol and nifedipine is scheduled for coronary artery bypass grafting. After induction with fentanyl and tracheal intubation, heart rate decreases to 40 bpm and blood pressure decreases to 70/40 mmHg. The ECG is shown. Which of the following is the most appropriate first step in management?


Three hours after undergoing coronary artery bypass grafting, an elderly man develops severe hypotension after intravenous administration of morphine 4 mg. Pulmonary artery occlusion pressure is 27 mmHg and central venous pressure is 30 mmHg. Transesophageal echocardiography shows decreased end-diastolic ventricular volumes. Which of the following is the most likely diagnosis?

ADVANCED Cardiac

Which of the following statements about pulmonary function testing is true?

ADVANCED Respiratory & Critical Care