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Open Scavenging Systems
Author(s) -
Paloheimo M.,
Salanne S. O.
Publication year - 1979
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1979.tb01492.x
Subject(s) - medicine , scavenging , biochemistry , antioxidant , chemistry
A mathematical model was developed to cover the dynamic characteristics of open scavenging systems. The performance of such a device depends on the expiratory tidal volume (V T ), the scavenging flow (V S ) and the mode of exhalational voliimc build‐up. A widely used open scavenging system was tested by using carbon dioxide in oxygen as a marker gas. Capnography revealed gross turbiilence in the expiratory reservoir, which tends to increase the polluted gas volumrs and loads extra requirements onto the scavenging equipment. Increases in the scavenging flow or the expiratory reservoir volume are the aids in obtaining satisfactory safety margins for pollution‐free scavenging of surplus anaesthetic gases. The tliroretical basis of a new method to determine the expiratory time constant of the respiratory system is also presented.