Anesthesia Hub -

10 Random Questions

A newly developed inhalational anesthetic has a blood-gas partition coefficient of 0.2. Which of the following statements best describes this drug compared with isoflurane?

(A) MAC is lower
(B) The difference between Fa and Fl during maintenance of anesthesia is greater
(C) Time to emergence is shorter
(D) Rapid induction requires greater overpressure
(E) Equilibrium in a circle system with the same flow of fresh gas is slower

BASIC Pharmacology & Pharmacokinetics

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

ADVANCED General Cardiac

Which of the following anesthetic techniques is most appropriate for a woman in the second stage of labor?

(A) Epidural opioids
(B) Local infiltration of the perineum
(C) Lumbar sympathetic block
(D) Paracervical nerve block
(E) Pudendal nerve block

ADVANCED OB Regional & Pain

A patient has severe hypotension, bronchospasm, and edema of the upper airway after injection of radiocontrast medium during cerebral angiography. The most appropriate immediate treatment is administration of

(A) diphenhydramine
(B) epinephrine
(C) methylprednisolone
(D) phenylephrine
(E) ranitidine

BASIC Pharmacology & Pharmacokinetics General

Which of the following vaporizer filling errors is most likely to result in inadvertent anesthetic overdose?

(A) Sevoflurane in a halothane vaporizer
(B) Sevoflurane in an isoflurane vaporizer
(C) Halothane in an sevoflurane vaporizer
(D) Halothane in an isoflurane vaporizer
(E) Isoflurane in an sevoflurane vaporizer

BASIC Equipment & Physics

A patient has decreased lung compliance and hypoxemia after a 30-minute episode of laryngospasm following extubation. The most likely cause is

(A) allergic reaction to the anesthetic
(B) altered alveolar-capillary membrane permeability
(C) anesthetic-induced lymphatic dysfunction
(D) increased pulmonary capillary pressure
(E) negative pulmonary interstitial hydrostatic pressure

BASIC Respiratory & Critical Care General

A patient spontaneously breathes nitrous oxide 60%, oxygen 40%, and enflurane for one hour. The nitrous oxide is then replaced with oxygen, and the inspired enflurane concentration is increased from 1% to 2%. Over 10 minutes, the end-tidal carbon dioxide tension increases from 30 to 40 mmHg. The most likely cause is

(A) discontinuation of nitrous oxide
(B) decreased alveolar-arterial carbon dioxide tension gradient
(C) increased metabolic rate
(D) increased physiologic dead space
(E) decreased central ventilatory response to carbon dioxide

Which of the following is more likely to occur with use of trimethaphan to induce hypotension than with use of nitroprusside?

(A) A predictable decrease in mean arterial pressure
(B) Increased mixed venous P02
(C) Increased serum lactate concentration
(D) Mydriasis
(E) Reflex tachycardia

In a spontaneously breathing patient, each of the following increases the work of breathing EXCEPT

(A) an increase in respiratory rate by 10/min
(B) a decrease in lung-thorax compliance by 10 cmH2O
(C) an increase in carbon dioxide production by 1 ml/kg/min
(D) a decrease in PaO2 from 80 to 65 mmHg
(E) a 0.1 increase in the ratio of dead space to tidal volume

BASIC Respiratory & Critical Care

A 39-year-old patient with insulin-dependent diabetes mellitus receives thiopental 250 mg and succinylcholine 80 mg and is ventilated with 0.75% isoflurane in oxygen. Arterial pressure decreases abruptly from 140/100 to 80/50 mmHg while heart rate remains unchanged at 70 bpm. Failure of heart rate to increase most likely results from

(A) acute hypoglycemia
(B) autonomic neuropathy
(C) depression of sinus node function by thiopental
(D) depression of the baroreflex response by isoflurane
(E) ganglionic stimulation by succinylcholine

ADVANCED General