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Influence from breathing pattern on alcohol and tracer gas expirograms: Implications for alcolock use
Mälardalen University, School of Innovation, Design and Engineering. (ISS)
Hök Instrument AB.
Mälardalen University, School of Innovation, Design and Engineering. (ISS)ORCID iD: 0000-0002-5832-5452
Uppsala University.
2011 (English)In: Forensic Science International, ISSN 0379-0738, E-ISSN 1872-6283, Vol. 206, no 1-3, p. 52-57Article in journal (Refereed) Published
Abstract [en]

Measurement of breath alcohol concentration is strongly influenced by timing and the breathing pattern. In particular, shallow expiration and hyperventilation leads to underestimation of the breath alcohol concentration. In the present study, expirograms of alcohol, water and carbon dioxide were recorded in 30 healthy individuals at various breathing manoeuvres (tidal volume, slow maximum and vital capacity expiration, breath holding, and hyperventilation). Estimation of the end expiratory alcohol concentration with the use of simultaneously measured carbon dioxide was shown to reverse the tendency of underestimation at shallow expiration and hyperventilation. These findings indicate that breath alcohol estimations can be performed at shorter expiration time and reduced expired volume compared to existing alcolocks. This is believed to improve their usability and to prevent a possible route for manipulation.

Place, publisher, year, edition, pages
Elsevier, 2011. Vol. 206, no 1-3, p. 52-57
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mdh:diva-10111DOI: 10.1016/j.forsciint.2010.06.016ISI: 000288200400033PubMedID: 20619980Scopus ID: 2-s2.0-79952444245OAI: oai:DiVA.org:mdh-10111DiVA, id: diva2:343256
Available from: 2010-08-12 Created: 2010-08-12 Last updated: 2017-12-12Bibliographically approved

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Ekström, Mikael

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