Anesthesia Hub -

10 Random Questions

A 30-year-old woman underwent emergency cesarean delivery under general anesthesia at 36 weeks' gestation because of preeclampsia. Two hours after the operation, she is still intubated and apneic and cannot be aroused. Deep tendon reflexes are 1+. With mechanical ventilation at an FiO2 of 0.4, PaO2 is 130 mmHg, PaCO2 is 32 mmHg, pH is 7.45, and base excess is -0.6. The most likely cause is

(A) hypovolemic shock
(B) intracerebral hemorrhage
(C) nitroprusside toxicity
(D) overdose of magnesium sulfate
(E) pituitary necrosis

ADVANCED OB

Which of the following is the most important function of temperature compensation in anesthetic vaporizers?

(A) Compensation for changes in the specific heat of the anesthetic during vaporization
(B) Delivery of diluent gas at a constant temperature regardless of flow rate
(C) Increase of bypass flow when the vaporizer is cooled by high fresh gas flow
(D) Maintenance of constant anesthetic vapor output over a range of vaporizer temperatures
(E) Maintenance of constant vapor concentrations at low flow rates

BASIC Equipment & Physics

During carotid endarterectomy, which of the following EEG patterns is most suggestive of cerebral ischemia?

(A) Ipsilateral spike-and-wave activity
(B) Bilateral change from beta to alpha rhythm
(C) Ipsilateral increase in beta activity
(D) Ipsilateral decrease in the spectral edge frequency from 10 to 4 Hz
(E) Bilateral increase in the spectral edge frequency from 8 to 15 Hz

Which of the following premedicant drug combinations is most effective in preventing passive regurgitation during anesthesia?

(A) Cimetidine and glycopyrrolate
(B) Metoclopramide and atropine
(C) Metoclopramide and ranitidine
(D) Metoclopramide, atropine, and ranitidine
(E) Metoclopramide and sodium bicitrate

BASIC Pharmacology & Pharmacokinetics

Pulmonary artery occlusion pressure is NOT a reliable estimate of left ventricular end-diastolic pressure when

(A) junctional cardiac rhythm is present
(B) mitral insufficiency is present
(C) pulmonary compliance is decreased
(D) pulmonary hypertension is present
(E) the catheter tip is in zone 1 of the lung

In clinical anesthesia practice, the term "informed consent" is best described as a legal concept in which patients

(A) agree to anesthesia care based on full disclosure of facts needed to make the decision intelligently
(B) are told of all possible risks of anesthesia and anesthetic procedures
(C) delegate all decisions regarding anesthesia care to the anesthesiologist
(D) release the physicians from liability
(E) sign global consent forms for surgical procedures that cover the administration of anesthesia care

BASIC General

Compared with intermittent positive pressure ventilation (IPPV), intermittent mandatory ventilation (IMV)

(A) better maintains cardiac output
(B) provides less than full mechanical ventilatory support
(C) requires a greater level of sedation
(D) requires a higher FlO2
(E) requires a lower inspiratory flow rate

BASIC Respiratory & Critical Care

A 66-year-old man with aortic regurgitation is brought to the operating room for aortic valve replacement after having received morphine, scopolamine premedication. PO2 is 40 mmHg in a sample of pulmonary artery blood drawn 10 minutes after the patient started breathing pure oxygen. This finding is compatible with

(A) wedging of the catheter tip
(B) left-to-right intracardiac shunt
(C) increased intrapulmonary shunting
(D) excessively depressed ventilation
(E) normal cardiac output

ADVANCED Cardiac

Which of the following attenuates the most common cardiovascular side effect of protamine administration?

(A) Pretreatment with a diuretic
(B) Pretreatment with a prostaglandin inhibitor
(C) Pretreatment with a pulmonary vasodilator
(D) Injection via the distal lumen of the pulmonary artery catheter
(E) Slow peripheral intravenous injection

A middle-aged, 70-kg man with a brain tumor is scheduled for an elective craniotomy. Preoperatively, he is alert but papilledema is present. Anesthesia is induced with thiopental 300 mg and succinylcholine 100 mg, followed by tracheal intubation. Immediately following intubation vigorous bucking occurs. The best immediate management would be to

(A) administer succinylcholine 100 mg intravenously
(B) administer fentanyl 500 jug intravenously
(C) hyperventilate with isoflurane 2%
(D) administer thiopental 400 mg intravenously
(E) hyperventilate and administer lidocaine 1 mg/kg intravenously

BASIC General Neuro