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Clinical study of diffusion hypoxia after nitrous oxide analgesia
F C Quarnstrom1, P Milgrom, M J Bishop
1Department of Dental Public Health Sciences, School of Dentistry, University of Washington, Seattle.
Anesthesia Progress
|January 1, 1991
Abstract:
In order to estimate the incidence of diffusion hypoxia, arterial oxygen saturation was measured in 104 healthy adult dental patients who were administered nitrous oxide-oxygen analgesia and who did not receive postcessation oxygen. Pretreatment saturation levels as determined by pulse oximetry ranged from 93% to 100%. When the nitrous oxide-oxygen administration ceased, the saturation levels were from 95% to 100%. The mean saturation dropped about 2% over the next 4 min and then stabilized. No patient had a posttreatment oxygen saturation of less than 92%.