Effects of gas flow management on postintubation end-tidal anesthetic concentration and operating room pollution

Journal of Clinical Anesthesia
D SikerM Vukcevich

Abstract

To study how different anesthetic practices during the transition from anesthetic delivery by mask to endotracheal intubation affect end-tidal postintubation anesthetic concentration and operating room (OR) pollution. Prospective study. Anesthesia research laboratory. We studied four gas flow management practices: practice vaporizer off, only the anesthetic vaporizer was turned off; all off, oxygen (O2), nitrous oxide (N2O), and the vaporizer were turned off; gas off: O2 and N2O were turned off; and all on: neither the gas flows nor the vaporizer were turned off. A model of inhalational anesthetic induction was simulated by using an adult circle system attached to a reservoir bag ("artificial lung"). By using a fixed gas flow, we achieved an end-tidal N2O (ETN2O) concentration of 70% and end-tidal halothane (ETHal) concentration of 3%, then stopped mechanical ventilation and performed the four practices for a 30-second "intubation" period. During this time, the reservoir bag was disconnected from the circuit, and the gas volume exiting the circuit (pollution volume) was measured. After this 30-second disconnect period, the bag was reconnected to the anesthetic circuit, and the original ventilation, gas flows, and vaporizer sett...Continue Reading

References

Jul 1, 1978·British Journal of Anaesthesia·E N Cohen
Oct 27, 1978·JAMA : the Journal of the American Medical Association·J Elliott
Sep 1, 1992·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·C WoodS Sheppard
Sep 1, 1990·Anaesthesia·V J Sarma, J Leman
Mar 1, 1985·Anesthesiology·J E BuringT Colton
Oct 1, 1985·Anesthesiology·J B Brodsky, E N Cohen
Mar 1, 1984·The Annals of Otology, Rhinology, and Laryngology·E OstfeldJ Dagan
Jul 1, 1980·The Journal of the American Dental Association·E N CohenJ B Brodsky

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