The Anesthesia Gas Machine

Michael P. Dosch CRNA PhD
University of Detroit Mercy Graduate Program in Nurse Anesthesiology
This site is

Revised July 2012


About this site

The purpose of this site is to teach and illustrate the current anesthesia gas machine, and related topics such as vaporization. The site is intended to benefit students, nurse anesthetists (CRNAs), physicians in anesthesiology, or anyone with an interest in anesthesia life-support equipment.

History of site

This site has been in existence since 2000, originating as lecture notes for a graduate course in nurse anesthesia at the University of Detroit Mercy. These documents are copyright Michael P Dosch. You may use them for any non-profit purpose.

The author

Michael Dosch CRNA PhD is Associate Professor and Chair of Nurse Anesthesia at the University of Detroit Mercy. His interests include anesthesia equipment, physics as related to monitors and equipment, and statistics. He has taught anesthesia equipment for almost 20 years, as well as spoken at professional conferences, written book chapters and published research on the topic.

Author's Disclosure Statement & Disclaimer

The author has no ongoing financial relationship with the manufacturers of any devices mentioned here. Some of this material has been presented (sponsored on some occaisions by Datex-Ohmeda) at state and national meetings of the AANA. The author has served as an invited consultant to Dräger Medical on one occaision.

The clinical recommendations made here are the author's personal opinions based on clinical practice, consultation with published materials and colleagues, and published research. Like all such clinical recommendations, they should be subjected to local peer review before adoption in other clinical settings.


The author gratefully acknowledges the assistance of Jeffery Feldman MD, Robert Clark and others at Dräger Medical, Telford Pennsylvania. Patrick Choate, Ann Marie Preece, and others from GE Healthcare (Madison Wisconsin) have been most helpful.

Finally, my gratitude to the nurse anesthesia students, CRNAs and physician colleagues at the University of Detroit Mercy, St Joseph Mercy Oakland, and Oakwood Hospital (Dearborn) who constantly challenge and inspire me.

Other resources for learning

Internet resources:

Resources in print which are helpful

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