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End tidal carbon dioxide measurement using an electro acoustic sensor

Authors:

Mia Folke, Bertil Hök, Mikael Ekström, Ylva Bäcklund

Research group:

Biomedical Engineering

Publication Type:

Conference/Workshop Paper

Venue:

Proceedings of the 26th Annual International Conference of the IEEE EMBS

Abstract

—End tidal carbon dioxide measurement with an electro-acoustic sensor is demonstrated. The sensor consists of an acoustic resonator coupled to a low cost electro-acoustic element. By simultaneous measurements with a reference sensor, the new device was tested on subjects performing exercise, hypo- and hyperventilation whereby the CO2 concentration ranged from 2.1 to 7.0 kPa. The output from the experimental device correlated well with the reference CO2 readings with a correlation coefficient of 0.976. Response time for expiration less than 0.8 seconds was noted. The new device could be useful in situations where selectivity to other gases is not important.

Bibtex

@inproceedings{Folke737,
author = {Mia Folke and Bertil H{\"o}k and Mikael Ekstr{\"o}m and Ylva B{\"a}cklund},
title = {End tidal carbon dioxide measurement using an electro acoustic sensor},
pages = {3452--3455},
month = {September},
year = {2004},
booktitle = {Proceedings of the 26th Annual International Conference of the IEEE EMBS},
url = {http://www.es.mdu.se/publications/737-}
}