Anesthesia Hub -

10 Random Questions

Following a right lower lobectomy, a patient develops a bronchopleural fistula and becomes hypoxic. He is orally intubated and mechanically ventilated with pure oxygen. PaO2 is 65 mmHg, PaCO2 is 70 mmHg, and pH is 7.25. Which of the following will produce the most favorable change in the blood gases?

(A) Increasing ventilatory frequency
(B) Increasing suction on the chest tube
(C) Applying 10 cmH2O positive end-expiratory pressure
(D) Using a double-lumen tube for differential ventilation
(E) Starting negative-pressure ventilation

ADVANCED Respiratory & Critical Care General

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

During emergency laparotomy, a patient who has been taking a monoamine oxidase inhibitor for six months develops hypotension despite adequate fluid therapy. The most appropriate management is administration of

(A) amrinone
(B) ephedrine
(C) epinephrine
(D) isoproterenol
(E) phenylephrine

Fetal distress is noted after administration of an epidural local anesthetic during labor. Fetal scalp pH is 7.0. Compared with a fetus with a scalp pH of 7.3, in this fetus the local anesthetic is present in

(A) a higher concentration, with a larger fraction in the ionized form
(B) a higher concentration, with a larger fraction in the unionized form
(C) the same concentration, with a larger fraction in the ionized form
(D) the same concentration, with a larger fraction in the unionized form
(E) a lower concentration, with a larger fraction in the ionized form

ADVANCED OB

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

Which of the following is most likely to increase hepatic blood flow during general anesthesia?

(A) Addition of positive end-expiratory pressure
(B) Discontinuation of isoflurane and administration of enflurane
(C) Increased PaCO2
(D) Moderate controlled hypotension
(E) Subarachnoid administration of morphine

BASIC General

A subarachnoid block to a sensory level of the second thoracic dermatome is associated with each of the following EXCEPT

(A) total sympathetic block
(B) decreased gastrointestinal smooth muscle tone
(C) bradycardia
(D) relaxation of gastrointestinal sphincters
(E) decreased renal blood flow

BASIC Regional & Pain

In the elderly, scopolamine-induced delirium is

(A) absent with doses less than 0.4 mg
(B) decreased by physostigmine
(C) reversible with diazepam
(D) reversible with pyridostigmine
(E) similar to that produced by glycopyrrolate

An otherwise healthy 16-year-old girl is undergoing posterior spinal fusion for thoracolumbar scoliosis. During the procedure, the most likely cause of a marked decrease in the amplitude of the somatosensory evoked potentials after stimulation of the posterior tibial nerve is

(A) administration of fentanyl 30 jag /kg for induction
(B) administration of isoflurane 1.3 MAC for maintenance
(C) administration of vecuronium 0.15 mg/kg
(D) a decrease in body temperature from 37 to 35°C
(E) a decrease in cerebrospinal fluid pressure

ADVANCED Equipment & Physics Pediatric Neuro

Recognized side effects of magnesium sulfate used for the treatment of preeclampsia that would be of anesthetic concern include each of the following EXCEPT

(A) maternal pulmonary edema
(B) neonatal hypotonia
(C) increased maternal sensitivity to succinylcholine
(D) increased maternal sensitivity to vecuronium
(E) maternal hypokalemia

ADVANCED OB