A comparison of waste gas concentrations during xenon or nitrous oxide anaesthesia
M Coburn1, J-H Baumert, A Zühlsdorff
1University Hospital Aachen, RWTH Aachen, Department of Anaesthesiology, Pauwelsstrasse 30, D-52074 Aachen, Germany. mcoburn@ukaachen.de
Background And Objective:
The aim of this study was to compare waste gas concentrations during xenon or nitrous oxide anaesthesia.
Methods:
A total of 64 patients were included in this study. Gas concentrations were measured with a mass spectrometer during anaesthesia. The probes were taken beside the patient's head and thorax and at a height of 180 cm above and at the floor level.
Results:
In both groups, waste gas concentrations peak after intubation and extubation. Waste gas levels during xenon anaesthesia are low compared with nitrous oxide.
Conclusions:
The low waste gas levels of xenon seem to be beneficial compared to nitrous oxide.
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Inhalational Anesthetics: Overview
Noble Gases
The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
Stages of General Anesthesia

