Citation

Schuff A, Dettling A, Jeske A, Zappe HA, Graw M, Haffner HT. Blutalkohol 2002; 39(4): 244-251.

Affiliation

Inst. fur Rechtsmedizin/Verkehrsmed., Universitat Heidelberg, Sektion Verkehrsmedizin, D-69115 Heidelberg, Germany.

Copyright

(Copyright © 2002, International Committee on Alcohol, Drugs and Traffic Safety and Bund gegen Alkohol und Drogen im Straßenverkehr, Publisher Steintor Verlag)

DOI

unavailable

PMID

unavailable

Abstract

The influence of the breathing technique (hypo- and hyperventilation) used in breath alcohol measurement using the Alcotest(registered trademark) 7110 MKIII Evidential is significantly reduced if not ruled out altogether by correcting the breath alcohol concentration (BrAC) to a standard temperature of 34(degrees)C (hyperventilation from - 11% to - 2%; hypoventilation from + 13% to + 7%). The BrAc deviation on hypoventilation correlates significantly with the time of hypoventilation (p lt 0.001). Besides temperature related alteration of alcohol saturation in breath, the time of alveolar contact seems to play an additional role. In hyperventilation compared to normoventilation the time of alveolar contact is only marginally reduced, therefore being of secondary importance in this context.