10 Random Questions
Pulmonary artery diastolic pressure is an unreliable indicator of left ventricular end-diastolic pressure in patients with
- (A) acute cardiogenic pulmonary edema
- (B) aortic stenosis
- (C) acute mitral regurgitation
- (D) myocardial ischemia
- (E) severe emphysema
Which of the following abnormalities in serum is most likely to result from intraoperative discontinuation of parenteral hyperalimentation?
- (A) Hypocalcemia
- (B) Hypocarbia
- (C) Hypoglycemia
- (D) Hypokalemia
- (E) Hyponatremia
A 28-year-old woman undergoes total thyroidectomy. The left recurrent laryngeal nerve is transected during the procedure. Which of the following findings is most likely postoperatively?
- (A) Normal voice
- (B) Aphonia
- (C) Hoarseness
- (D) Expiratory stridor
- (E) Inspiratory stridor
In a patient with surgically significant aortic insufficiency, cardiac output measured by thermodilution will
- (A) be greater than right ventricular output
- (B) be less than left ventricular output
- (C) be less than cardiac output measured by the Fick method
- (D) be inaccurate because of decreased signal-to-noise ratio
- (E) underestimate net systemic arterial blood flow
A 50-year-old woman notes loss of sensation in the medial lower leg 24 hours after vaginal hysterectomy in the lithotomy position. Which of the following nerves is most likely to be injured?
- (A) Lateral femoral cutaneous
- (B) Obturator
- (C) Peroneal
- (D) Saphenous
- (E) Tibial
During anesthesia with nitrous oxide and isoflurane in a 70-kg, 25-year-old patient, airway resistance would be decreased by
- (A) a decrease in lung volume
- (B) insertion of a 9-mm endotracheal tube
- (C) administration of atropine
- (D) neuromuscular block with d-tubocurarine
- (E) movement of the patient from the supine to the sitting position
The tracing shown is from a femoral artery catheter. Which of the following is the most likely explanation?
- (A) An air bubble greater than 1 ml is in the tubing
- (B) The diastolic pressures is factitiously high
- (C) Mean blood pressure is inaccurate
- (D) The monitoring system is underdamped
- (E) Systolic pressure in the aortic arch exceeds 200 mmHg
As part of a preoperative evaluation, a patient had a thallium scan showing a "cold spot" over the left ventricle that occurs with moderate exercise and disappears at rest. This most likely indicates
- (A) moderate-sized aneurysm of the left ventricle
- (B) acute myocardial ischemia
- (C) recent myocardial infarction
- (D) old myocardial infarction
- (E) Prinzmetal's variant angina
Following blunt trauma to the chest, a patient has tachycardia, hypotension, and markedly distended neck veins. Each of the following is expected EXCEPT
- (A) cardiac output of 2.1 L/min
- (B) mixed venous oxygen saturation of 75%
- (C) pulmonary artery occlusion pressure of 25 mmHg
- (D) pulmonary artery diastolic pressure of 25 mmHg
- (E) right atrial pressure of 25 mmHg
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