Anesthesia Hub -

10 Random Questions

Neostigmine administered intravenously without atropine can produce each of the following EXCEPT

(A) arousal
(B) bradycardia
(C) bronchoconstriction
(D) increased gastric motility
(E) increased urinary bladder tone

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

Which of the following is a characteristic of the Bain breathing circuit?

(A) Condensation of moisture in inspired gases is facilitated by the circuit design
(B) Fresh gas flows coaxially around the exhalation limb
(C) Fresh gas flows need not exceed minute ventilation
(D) The circuit eliminates the possibility of rebreathing
(E) The circuit is functionally similar to the Jackson-Rees system

BASIC Equipment & Physics

A 30-year-old man has had burning pain, allodynia, and edema of the hand for six weeks after sustaining a forearm fracture. Appropriate treatment includes each of the following EXCEPT

(A) physical therapy, employing stress loading
(B) oral prazosin
(C) intravenous regional sympathetic block with guanethidine
(D) stellate ganglion block with 6% phenol
(E) transcutaneous electrical nerve stimulation

ADVANCED Regional & Pain

A 55-year-old man is undergoing craniotomy in the sitting position. Mean arterial pressure is 75 mmHg; arterial blood gas values are PaCO2 41 mmHg and pH 7.37. End-tidal CO2 is 7 mmHg. Which of the following is the most likely cause of the increased PaCO2 to PetCO2 gradient?

(A) Decreased cardiac output
(B) Endobronchial intubation
(C) Hyperinflation of the lungs
(D) Partial disconnect of the capnograph sample tubing
(E) Venous air embolism

BASIC Equipment & Physics Respiratory & Critical Care

Which of the following is the most likely cause of the rapid onset of local anesthesia when sodium bicarbonate is added to lidocaine?

(A) Decreased extracellular calcium ion concentration
(B) Increased extracellular pH
(C) Increased intracellular pH
(D) Increased ionized lidocaine diffusion
(E) Increased nonionized lidocaine concentration

BASIC Pharmacology & Pharmacokinetics

Halothane anesthesia is usually associated with an increase in

(A) cardiac contractility
(B) venous capacitance
(C) arterial pressure
(D) venous return
(E) heart rate

BASIC Pharmacology & Pharmacokinetics

In a patient with chronic renal failure, which of the following statements concerning muscle relaxants is true?

(A) Duration of action of vecuronium is prolonged
(B) The elimination half-life of atracurium is tripled
(C) Reversal with neostigmine is con train dicated
(D) The onset of action of mivacurium is delayed
(E) Succinylcholine is contraindicated

BASIC Pharmacology & Pharmacokinetics

DC shocks of 200 joules applied directly to the heart are likely to

(A) worsen coronary perfusion
(B) prevent postshock arrhythmias
(C) produce myocardial contractile abnormalities
(D) increase myocardial impedance
(E) decrease myocardial temperature

ADVANCED General

Which of the following is the most appropriate initial management of a patient with hypotension secondary to sepsis?

(A) Calcium chloride
(B) Corticosteroids
(C) Crystalloid infusion
(D) Dopamine
(E) Fresh frozen plasma

BASIC Respiratory & Critical Care General