Assessing blood concentration of a volatile constituent,申请号GB20050021502-传众专利搜索

Assessing blood concentration of a volatile constituent

申请公布号：GB2431470(A)

申请号：GB20050021502

申请日期：2005.10.21

申请公布日期：2007.04.25

申请人：

AUTOLIV DEVELOPMENT AB

发明人：BERTIL HOEK;GERT ANDERSSON;H¨KAN PETTERSSON

分类号：G01N33/497

主分类号：G01N33/497

摘要：A method of assessing the blood concentration level in a human or animal subject, of a volatile blood constituent (preferably alcohol) is disclosed. The method comprises steps of positioning a sensor within the expiratory gas flow of the subject, wherein the sensor is configured to detect the presence of the constituent and provide a first output signal representative of the concentration of said constituent in air, and also to detect a presence of carbon dioxide and to provide a second output signal representative of the concentration of carbon dioxide in air. The flow of expiratory gases from the subject is sampled to provide a first signal and second signal in respect of the expiratory gases substantially simultaneously and these signals are processed according to an algorithm which is configured so as to make the second signal representative of the degree of dilution of the expiratory air flow. Also claimed is apparatus for carrying out the method, preferably being provided in a motor vehicle.