TY  - JOUR
PY  - 2018//
TI  - A two-year study of ∆ 9 tetrahydrocannabinol concentrations in drivers; Part 2: physiological signs on drug recognition expert (DRE) and non-DRE examinations
JO  - Journal of forensic sciences
A1  - Declues, Kari
A1  - Perez, Shelli
A1  - Figueroa, Ariana
SP  - 583
EP  - 587
VL  - 63
IS  - 2
N2  - 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>
LA  - en
SN  - 0022-1198
UR  - http://dx.doi.org/10.1111/1556-4029.13550
ID  - ref1
ER  -