Anesthesia Hub -

10 Random Questions

A healthy patient is receiving general endotracheal anesthesia with nitrous oxide 4 L/min, oxygen 2 L/min, and isoflurane 1% with spontaneous ventilation. The inspiratory breathing hose becomes disconnected from the inspiratory valve. The earliest alarm will be produced by

(A) a pulse oximeter with finger probe set to alarm at 60% saturation
(B) a mass spectrometer set to alarm when no breath is detected for 30 seconds
(C) an oxygen analyzer mounted on the inspiratory valve outlet and set to alarm at 25% oxygen concentration
(D) a capnograph sensor at the Y-piece that alarms when end-tidal carbon dioxide tension is greater than 60
mmHg

BASIC Equipment & Physics

Which of the following is the best method of pacing to improve cardiac output in a patient with third-degree heart block?

(A) VOO
(B) AOO
(C) VVI
(D) DVI
(E) Transcutaneous

ADVANCED General Cardiac

A 56-year-old woman with pulmonary fibrosis is scheduled for pneumonectomy. Which of the following parameters best predicts potential postoperative functional impairment?

(A) Exercise tolerance
(B) Flow-volume loop
(C) Resting arterial blood gas values
(D) Unilateral pulmonary artery occlusion pressure
(E) Vital capacity and FEV,

ADVANCED Respiratory & Critical Care General

A 1100-g, 10-day-old infant is to undergo ligation of a patent ductus arteriosus after unsuccessful medical treatment. Within three minutes of intravenous administration of atropine 20 mcg, fentanyl 20 mcg, and pancuronium 0.1 mg, systemic blood pressure decreases from 80 to 30 mmHg, heart rate from 180 to 140 bpm, and arterial oxygen saturation from 90% to 80%. The most appropriate management is to

(A) increase FiO2
(B) administer additional atropine
(C) infuse crystalloid
(D) infuse prostaglandin E1
(E) administer phenylephrine

ADVANCED Pediatric Cardiac

Which of the following is decreased by alkalinization of a 1.5% lidocaine solution?

(A) Concentration of free base
(B) Dose required for anesthesia
(C) Duration of anesthesia
(D) Intracellular concentration of ionized lidocaine
(E) Time to onset of anesthesia

BASIC Pharmacology & Pharmacokinetics Regional & Pain

A patient is undergoing exploration of a stab wound to the left side of the neck. On awake laryngoscopy, the left vocal cord is in midposition and the right vocal cord is abducted during inspiration. The most likely cause of these findings is trauma to which of the following structures on the left?

(A) C7-8 nerve root
(B) Stellate ganglion
(C) Glossopharyngeal nerve
(D) Superior laryngeal nerve
(E) Vagus nerve

BASIC General

A 66-year-old man with chronic obstructive pulmonary disease who underwent colectomy 12 hours ago has been receiving an epidural infusion of fentanyl at a rate of 100 mcg/hr. Which of the following is LEAST likely to develop?

(A) Hypotension
(B) Nausea
(C) Pruritus
(D) Respiratory depression
(E) Urinary retention

BASIC Pharmacology & Pharmacokinetics

Which of the following statements concerning hyperkalemia after succinylcholine administration to a patient with a spinal cord injury is true?

(A) It is unlikely to occur if the lesion is located below T6
(B) It is unlikely to occur within 24 hours of the injury
(C) It is unlikely to occur more than 60 days after the initial injury
(D) It is prevented by pretreatment with small doses of a nondepolarizing agent
(E) It is decreased in magnitude by pretreatment with calcium chloride

BASIC Pharmacology & Pharmacokinetics

Compared with adults, neonates are more likely to become hypoxemic following anesthesia and extubation because of a relatively

(A) higher rate of oxygen consumption
(B) greater sensitivity to neuromuscular blockade
(C) larger Vd/Vt ratio
(D) lower blood pressure
(E) smaller functional residual capacity

ADVANCED Pediatric

A patient receiving monoamine oxidase inhibitor therapy for depression undergoes an emergency cholecystectomy. Which of the following is the best means of providing postoperative analgesia in this patient?

(A) Epidural analgesia using 0.25% bupivacaine
(B) Intravenous meperidine
(C) Epidural analgesia using meperidine
(D) Epidural analgesia using 1% lidocaine with epinephrine
(E) Intercostal analgesia using 1% lidocaine with epinephrine

ADVANCED Pharmacology & Pharmacokinetics Regional & Pain