10 Random Questions
Each of the following statements about pheochromocytoma is true EXCEPT:
- (A) Preoperative administration of alpha-adrenergic inhibitors will usually reverse EKG changes due to catecholamine myocarditis
- (B) Preoperative administration of alpha-adrenergic inhibitors decreases operative mortality
- (C) Beta-adrenergic inhibitors should be administered preoperatively only in conjunction with alpha-adrenergic inhibitors
- (D) Vasopressor therapy may be necessary postoperatively for treatment of hypotension
- (E) Nasal congestion is a sign of inadequate alpha-adrenergic block
The figure describes the uptake of nitrous oxide 75% by individual tissue groups (VRG = vessel-rich group, MG = muscle group, FG = fat group) and their sum (total uptake, TU). Which set of labels accurately describes the curves?
- (A) 1- MG, 2- FG, 3- VRG, 4- TU
- (B) 1- VRG, 2- MG, 3- FG, 4- TU
- (C) 1- FG, 2- MG, 3- TU, 4- VRG
- (D) 1- TU, 2- FG, 3- MG, 4- VRG
- (E) 1- TU, 2- VRG, 3- MG, 4- FG
The two E oxygen cylinders on an anesthesia machine have pressure readings of 1100 psi each. At an oxygen flow of 3 L/min, there will be sufficient oxygen for approximately
- (A) 2.5 hours
- (B) 3.5 hours
- (C) 5.5 hours
- (D) 7 hours
- (E) 8 hours
Which of the following phenomena is primarily responsible for the decrease in core body temperature that commonly occurs during the first hour of general anesthesia?
- (A) Convective heat loss from cutaneous vasodilation
- (B) Decreased heat production
- (C) Evaporative heat loss during skin preparation
- (D) Heat loss from the respiratory tract
- (E) Redistribution of core body heat to the periphery
Each of the following drugs is a cause of central anticholinergic syndrome EXCEPT
- (A) amitriptyline
- (B) atropine
- (C) diphenhydramine
- (D) promethazine
- (E) ranitidine
Acute epiglottitis usually
- (A) requires a lateral radiograph of the neck for diagnosis
- (B) occurs in children 2 to 4 years of age
- (C) is treated effectively with racemic epinephrine
- (D) has a viral etiology
- (E) requires immediate awake intubation by direct laryngoscopy in the emergency department
A patient who is scheduled for a parathyroidectomy for a parathyroid adenoma has a preoperative serum calcium concentration of 13.5 mg/dl. The ECG shows no acute changes. The most appropriate preoperative management is administration of
- (A) calcitonin
- (B) hydrocortisone
- (C) intravenous saline solution
- (D) mannitol
- (E) potassium phosphate
During induction of general anesthesia in a patient with a supraglottic tumor, both intubation and subsequent ventilation via a face mask are impossible. A cricothyroidotomy is performed with a 16-gauge intravenous catheter. Which of the following statements is true?
- (A) Application of pressures greater than 35 cmH2O to the catheter will increase the risk for pulmonary barotrauma
- (B) PaC02 can be maintained at a normal level using a standard circle system attached to the catheter
- (C) PaO2 greater than 100 mmHg can be maintained indefinitely using transtracheal jet ventilation with pure oxygen through the catheter
- (D) Emergency surgical tracheostomy would have improved the likelihood of survival
- (E) The presence of this tumor contraindicates jet ventilation via cricothyroidotomy
The plasma concentration of equal doses of a local anesthetic is highest when the site of administration is
- (A) axillary brachial plexus
- (B) caudal
- (C) intercostal
- (D) lumbar epidural
- (E) subcutaneous
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