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Anesth Analg 1983; 62:758-763
© 1983 International Anesthesia Research Society
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Laboratory Investigation of Six Artificial Noses for Use during Endotracheal Anesthesia

Duke B. Weeks, MD, and Fredric M. Ramsey, MD

Department of Anesthesia, Bowman-Gray School of Medicine of Wake Forest University, Winston-Salem, North Carolina.

Abstract

The performances of six commercially available heat and moisture exchangers (HMEs) or "artificial noses," were evaluated in the laboratory. Each HME was studied with both a semiclosed anesthesia circuit (SCAC) and a nonrebreathing anesthesia system (NRS). Our results suggest that the Servohumidifier 150 and the Engström Edith are suitable for replacing nasopharyngeal humidification mechanisms bypassed during endotracheal ventilation in all patients because they provided at least 20 mg of water per liter of minute ventilation (mg/L) in an NRS and 28 mg/L in an SCAC during inspiration. While the other four units were suitable for small tidal volumes, they only marginally satisfied minimal suggested humidity levels in the presence of larger tidal volumes.

Key Words: EQUIPMENT: humidifiers.




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S. Schumann, C. A. Stahl, K. Moller, H.-J. Priebe, and J. Guttmann
Moisturizing and mechanical characteristics of a new counter-flow type heated humidifier
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[Abstract] [Full Text] [PDF]


Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 1983 by the International Anesthesia Research Society.