Are blood or saliva concentrations of delta-9 THC metabolites predictive of impairment? That’s what a recent article in the Neuroscience and Biobehavioral Reviews journal sought to determine. The article published data from a meta-regression analysis of 28 studies involving 824 participants. The biggest takeaway is that neither THC nor THC metabolite concentrations are consistent predictors […]
There is a growing trend in Iowa when it comes to OWI investigations, particularly those involving drugs other than alcohol. Peace officers are bypassing the standard implied consent procedures and seeking search warrants for blood instead. It’s not just for situations involving deaths or potentially fatal injuries. Yes, there’s a law authorizing search warrants in […]
The February 5, 2021 issue of Traffic Injury Prevention published results from an Australian study assessing the relationship between THC levels and driving performance. Volunteers consumed vaporized cannabis samples of varying potencies containing THC, CBD and a placebo. Blood and saliva samples were collected 30 minutes after inhalation and 3.5 hours later. Researchers evaluated driving […]
According to data recently published in the journal Drug and Alcohol Dependence, THC remained detectable in blood at levels greater than 2.0 ng/ml during several days of abstinence. Investigators affiliated with the University of British Columbia reviewed the relevant literature assessing residual THC plasma levels in those who regularly consume cannabis. They reported: “[I]n all […]
I recently came across a little-known study published in the Journal of Analytical Toxicology that raises serious questions regarding whether the gold standard in forensic urine testing could mistake hemp-derived CBD for THC. Many laboratories include derivatization as a part of their sample preparation for analysis by gas chromatography – mass spectroscopy (GC-MS). Derivatization is the […]
Polk County, Iowa- Client’s breath test was thrown out of court when it was determined that the officer violated the client’s rights to an independent blood test. The client’s driver’s license was spared and he avoided an OWI conviction.