@article{ref1,
title="A two-year study of ∆ 9 tetrahydrocannabinol concentrations in drivers; Part 2: physiological signs on drug recognition expert (DRE) and non-DRE examinations",
journal="Journal of forensic sciences",
year="2018",
author="Declues, Kari and Perez, Shelli and Figueroa, Ariana",
volume="63",
number="2",
pages="583-587",
abstract="Whole blood samples were examined for ∆(9) -Tetrahydrocannabinol (THC) over 2 years in drivers suspected of driving under the influence. Part one of the study examined the link between [THC] and performance on field sobriety tests. This portion examined objective signs, eye examinations and physiological indicators; and their relationship to the presence of THC. Several objective signs were excellent indicators of the presence of THC: red eyes (94%), droopy eyelids (85.6%), affected speech (87.6%), tongue coating (96.2%), and odor of marijuana (82.4%). About 63.6% of THC positive subjects had dialted pupils (room light). THC positive subjects had either rebound dilation or hippus in 88.8% of cases. Pulse and blood pressure (BP) were evaluated to determine any correlation with [THC]. An increased pulse rate correlated well to the presence of THC (88.5%), but not [THC]. BP did not correlate to [THC] and was also a poor indicator of THC in the blood (50% high).<br><br>© 2017 American Academy of Forensic Sciences.   Keywords: Cannabis impaired driving <p /> <p>Language: en</p>",
language="en",
issn="0022-1198",
doi="10.1111/1556-4029.13550",
url="http://dx.doi.org/10.1111/1556-4029.13550"
}