The Use of Oral Fluid and Sweat Wipes for the Detection of Drugs of Abuse in Drivers

    Volume 47, Issue 6 (November 2002)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 1 November 2002

    Page Count: 8


    Verstraete, AG
    Laboratory of Clinical Biology-Toxicology, Ghent University, Ghent,

    De Boeck, G
    National Institute of Criminalistics and Criminology, section Toxicology, Brussels,

    Samyn, N
    National Institute of Criminalistics and Criminology, section Toxicology, Brussels,

    (Received 20 June 2002; accepted 12 June 2002)

    Abstract

    Blood, urine, oral fluid (by spitting or with a Salivette®), and sweat samples (by wiping the forehead with a fleece moistened with isopropanol) were obtained from 180 drivers who failed the field sobriety tests at police roadblocks. With quantitative GC-MS, the positive predictive value of oral fluid was 98, 92, and 90% for amphetamines, cocaine, and cannabis respectively. The prevalence of opiate positives was low. The SAMHSA cut-off values for oral fluid testing at the workplace, proved their usefulness in this study. The positive predictive value of sweat wipe analysis with GC-MS was over 90% for cocaine and amphetamines and 80% for cannabis. The accuracy of Drugwipe® was assessed by comparing the electronic read-out values obtained on-site after wiping the tongue and the forehead, with the corresponding GC-MS results in plasma, oral fluid, and sweat. The accuracy was always less than 90% except for the amphetamine-group in sweat.


    Paper ID: JFS15579J

    DOI: 10.1520/JFS15579J

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    Title The Use of Oral Fluid and Sweat Wipes for the Detection of Drugs of Abuse in Drivers
    Symposium , 0000-00-00
    Committee E30