A system for respiratory flow proportional sampling

There is a method described for determination the amount of air pollutants incorporated by breathing. The method is based on the non-invasive and continuous sampling of air contents. In contrary to common methods there is no need for any assumptions about the retention rate. Working principle: The b...

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Bibliographic Details
Published in:	Zeitschrift fur die gesamte Hygiene und ihre Grenzgebiete Vol. 35; no. 7; p. 426
Main Authors:	Bytel, H, Keitel, J, Seifert, M, Schmidt, P
Format:	Journal Article
Language:	German
Published:	Germany 01-07-1989
Subjects:	Air Pollutants, Occupational - analysis Breath Tests - instrumentation Hazardous Substances - analysis Humans Microcomputers Pulmonary Ventilation Signal Processing, Computer-Assisted Spirometry - instrumentation
Online Access:	Get more information
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Summary:	There is a method described for determination the amount of air pollutants incorporated by breathing. The method is based on the non-invasive and continuous sampling of air contents. In contrary to common methods there is no need for any assumptions about the retention rate. Working principle: The breathing flow drives two pneumatic circuits related to inspiration and respiration respectively. The respirometer signal controls the two membrane pumps and delivers the respiration volume. In every moment a little but fixed percentage of breathing air is sucked by a pump through one of the two charcoal tubes. After the quantitative analysis of the probes you know the mass difference of the pollutant and because of the choice relation to respiration volume you can calculate the incorporated dose.
ISSN:	0049-8610