Has anyone found a commercially available nitrous oxide delivery machine that 
does not require modification and

1. Does NOT have a demand valve (i.e., is a continuous circuit), and

2. Allows attachment of a full face mask, and

3. Provides scavenging of waste gases?

Joseph D. Gunn, MD
Division of Emergency Medicine
Department of Pediatrics
Washington University School of Medicine
Office 314-454-5442
Fax 314-454-4345

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