Anesthesia Hub -

10 Random Questions

Halothane

(A) has no effect on reflex hypoxic pulmonary vasoconstriction
(B) protects the myocardium from beta-adrenergic stimulation
(C) has a direct, negative chronotropic effect on the sinoatrial node
(D) metabolites decrease renal concentrating ability
(E) is unsafe for use with epinephrine-containing local anesthetics

A 32-year-old man with acute aortic regurgitation is scheduled to undergo emergency aortic valve replacement. Heart rate is 110 bpm, blood pressure is 90/35 mmHg, and pulmonary artery occlusion pressure is 14 mmHg. Cardiac index is 2.2 L/min/m2. Which of the following is the most appropriate management?

(A) Administration of esmolol
(B) Administration of a fluid bolus before induction
(C) Infusion of dobutamine
(D) Infusion of phenylephrine
(E) Induction of anesthesia

During anesthesia with nitrous oxide 65% in oxygen, fentanyl, and pancuronium, nitroprusside is administered to decrease arterial pressure to 85/50 mmHg. A decrease in PaO2 from 120 to 65 mmHg is most likely caused by

(A) cyanide toxicity
(B) depressed cardiac output
(C) mild hypercarbia
(D) metabolic acidosis
(E) pulmonary vasodilation

BASIC Pharmacology & Pharmacokinetics

Each of the following drugs is a cause of central anticholinergic syndrome EXCEPT

(A) amitriptyline
(B) atropine
(C) diphenhydramine
(D) promethazine
(E) ranitidine

Which of the following will result in the largest change in oxygen content?

(A) Increased hemoglobin (Hgb) concentration from 10 to 15 g/dl
(B) Increased PaO2 from 40 to 50 mmHg (Hgb 15 g/dl)
(C) Increased PaO2 from 60 to 70 mmHg (Hgb 15 g/dl)
(D) Increased P50 of Hgb from 27 to 37 mmHg (Hgb 15 g/dl)
(E) Increased pH from 7.20 to 7.40

BASIC General

Which of the following is most likely to decrease uterine tone?

(A) Administration of isoflurane 1%
(B) Administration of nitrous oxide 50%
(C) Intravascular injection of 5 ml of 0.5% bupivacaine
(D) Intravenous administration of ketamine 2 mg/kg
(E) Paracervical block with 20 ml of 1% lidocaine

ADVANCED OB

Compared with the adult airway, the airway of an infant is characterized by

(A) greater narrowing at the cricoid ring
(B) a less rigid epiglottis
(C) a more caudad laryngeal opening
(D) a relatively smaller tongue
(E) relatively larger tonsils

ADVANCED Pediatric

Each of the following indicates a hemolytic transfusion reaction in an anesthetized patient EXCEPT

(A) bleeding diathesis
(B) wheezing
(C) hypotension
(D) hemoglobinuria
(E) decreased serum haptoglobin concentration

ADVANCED Transfusions & Fluids

Which property of oxygen is detected by the fail-safe device on the anesthesia machine?

(A) Concentration
(B) Flow
(C) Pressure
(D) Partial pressure
(E) Reserve volume

BASIC Equipment & Physics

A 14-year-old girl with status asthmaticus is receiving oxygen 3 L/min through nasal prongs. Heart rate is 110 bpm. Arterial blood gas values are PaO2 90 mmHg, PaCO2 32 mmHg, and pH 7.46. If ventilation appears unchanged, which of the following is the most reliable sign of impending respiratory failure?

(A) PaO2 of 80 mmHg
(B) PaCO2 of 39 mmHg
(C) Heart rate of 140 bpm
(D) Increased wheezing
(E) Deterioration of mental status

ADVANCED Respiratory & Critical Care Pediatric