Measurement of Waste Gas Contamination during Nitrous Oxide Sedation in a Non-Ventilated Dental Operatory.

摘要

The concentration of waste gas in the ambient air during administration of N2O/O2 analgesia is dependent upon many factors. Three of these--distance from the nosepiece escape valve, position in relation to the direct line of waste gas dissemination and the deviation of the analgesia--were studied. Analysis of the data indicates that all three factors were significant in affecting gas concentration at any given point. Angulation or position in relation to the direction of waste gas dissemination was shown to be the most dominant factor.