“Preliminary clinical reports suggest anywhere above 1 to 15 nanograms of THC per milliliter of blood is considered a level of impairment.”
Developed by researchers from the University of Texas, THC sensor strips and an electronic reader could help kick some persistent misperceptions to the curb, including that driving after smoking cannabis is safer than driving drunk.
As legalization increases around the globe, more and more regions are in need of proper testing options for drivers potentially impaired by cannabis.
Blood tests for THC are accurate, but time-consuming and invasive, while trying to measure THC levels in breath are error-prone, according to Dr. Shalini Prasad.
Another hurdle is that the accuracy of current devices is outside the range of the established baseline for impairment. “This is an emerging field, but preliminary clinical reports suggest that anywhere above 1 to 15 nanograms of THC per milliliter of blood is considered a level of impairment,” Prasad says.
However, researchers in Texas found that their device, which requires less than five minutes to complete, was accurate for THC levels ranging from 100 picograms per millilitre to 100 nanograms per millilitre.
Published: April 02, 2020
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