10 Random Questions
Which of the following is the most appropriate treatment of methemoglobinemia prior to emergency surgery?
- (A) Hydroxocobalamin
- (B) Methylene blue
- (C) Oxygen by face mask
- (D) Packed red blood cells
- (E) Thiosulfate
A radial artery catheter is to be used for blood pressure measurement during a sitting craniotomy. When zeroing the transducer, which of the following describes the best levels for placement of the transducer and opening of the system to air? (Transducer, Opening to Air)
- (A) Head Wrist
- (B) Head Head
- (C) Head Heart
- (D) Heart Heart
- (E) Heart Wrist
Compared with a normal child, which of the following is expected during inhalation induction in a child with a 2:1 left-to-right intracardiac shunt?
- (A) Decreased rate of rise of alveolar anesthetic tension
- (B) Decreased anesthetic concentration in pulmonary artery blood
- (C) Decreased cerebral blood flow
- (D) Increased anesthetic concentration in vena cava blood
- (E) No difference in time for anesthetic induction
After receiving excessive intraoperative blood replacement, a patient anesthetized with fentanyl, diazepam, and nitrous oxide develops acute pulmonary edema. The drug most likely to help him acutely is
- (A) isoflurane
- (B) nitroprusside
- (C) digoxin
- (D) nitroglycerin
- (E) furosemide
A 33-year-old primigravid woman with myasthenia gravis, well-controlled with pyridostigmine, is in labor with the cervix dilated 7 cm. She has a headache and feels very nervous. Blood pressure is 160/115 mmHg, she has 3+ pitting edema, and urinalysis shows 4+ protein. Appropriate management of her labor should include
- (A) lumbar epidural block with bupivacaine 8 ml of 0.5% solution
- (B) chlorpromazine 2.5 mg administered intravenously
- (C) avoidance of narcotics
- (D) lumbar epidural block with 2-chloroprocaine 8 ml of 3% solution
- (E) chlorpromazine 10 mg administered intramuscularly
The cardiovascular effects of an inhalational anesthetic are evaluated in 10 normal volunteers in the awake resting state and after 15 minutes of constant inspired concentration. Results were analyzed by t-test for paired data and are presented below as mean +/- standard deviation. Based on these data, which of the following conclusions is most valid?
- (A) A decrease in cardiac output would have been evident if more subjects were included in the study
- (B) The anesthetic decreases mean arterial pressure
- (C) The anesthetic does not cause cardiac depression
- (D) The anesthetic is unsafe for patients with coronary after disease
- (E) There is a 95% to 100% chance that the anesthetic increases heart rate
A 40-year-old woman with chronic renal failure is undergoing revision of an arteriovenous shunt with general anesthesia. The capnographic waveform was obtained during spontaneous ventilation 20 minutes after administration of succinylcholine and tracheal intubation. Which of the following is the most likely cause of these findings?
- (A) Leaking endotracheal cuff
- (B) Channeling of soda lime
- (C) Light anesthesia
- (D) Metabolic acidosis
- (E) Residual neuromuscular block
A 13-year-old African American boy has severe abdominal pain after debridement of an open fracture of the lower extremity. His hemoglobin concentration is 10 g/dl and a peripheral blood smear shows elongated crescent-shaped erythrocytes. The most appropriate initial therapy is
- (A) sodium bicarbonate administration
- (B) dopamine infusion
- (C) blood transfusion
- (D) volume loading with crystalloid
- (E) high-dose corticosteroid administration
Which of the following is the most appropriate action after an anesthetic vaporizer is tipped?
- (A) Return to the manufacturer for recalibration
- (B) Flush the vaporizer with oxygen at 5 L/min for 24 hours
- (C) Store the vaporizer for 24 hours at room temperature
- (D) Set the vaporizer at low concentration and flush with oxygen at 10 L/min for 30 minutes
- (E) Verify the vaporizer output with mass spectrography
A 45-year-old woman undergoes aortic valve replacement for aortic stenosis. Two minutes after removal of the venous cannulae, air is noted in the arterial inflow cannula. Heart rate is 80 bpm, blood pressure is 95/60 mmHg, and cardiac index is 1.5 L/min/m2. ST-segment elevation is noted in EKG leads II, III, and aVF. The most appropriate next step is to
- (A) administer thiopental
- (B) decrease left ventricular afterload
- (C) increase arterial blood pressure
- (D) replace the left ventricular vent
- (E) resume cardiopulmonary bypass