Show Notes
Dr. Riley Kirk has Dr. Denise Valenti on the podcast to discuss cannabis and driving, cannabis impairment, THC testing, and the challenges of determining whether someone is actually too impaired to drive. They explore why THC levels in the body do not necessarily correspond to impairment and how cannabis can affect vision, peripheral vision, contrast sensitivity, eye movement, balance, and pupil response.
They also discuss the limitations of current roadside cannabis testing compared with alcohol testing, including the challenges of using blood THC levels, cognitive tests, and field sobriety tests to determine cannabis impairment. Dr. Valenti explains her work developing technology that could combine multiple sensory measurements to identify impairment more accurately.
The conversation also explores how dose, tolerance, consumption method, individual differences, medical conditions, and baseline function can influence impairment and why there is no universal rule for how long someone should wait before driving after consuming cannabis. They discuss Drug Recognition Experts, the need for stronger scientific validation and national standards, and the importance of developing impairment-testing technology that is accurate and free from racial bias.
Finally, they discuss cannabis and driving research, harm reduction, the challenges of funding cannabis impairment studies, and why controlled, dose-specific research is needed to better understand the relationship between cannabis, impairment, and road safety.
Chapters
00:00 Cannabis Driving Question 01:08 Denise Valenti Background 03:57 Vision Loss and Driving Research 05:49 Dopamine Retina Link 07:34 Building Impairment Tests 09:38 Why THC Levels Fail 14:39 Courtroom Ready Tech 17:45 Four Part Roadside Goggle 19:56 Crash Data and Medical Use 23:33 How Long Impairment Lasts 28:41 Microdosing and Self Awareness 34:39 DREs and Legal Standards 37:05 Bias In New Tech 39:19 Glassy Eyes Mystery 39:48 Smell Changes And Munchies 41:46 THC In Tears Study 46:35 Roadside Vs Workplace Testing 48:04 Cannabis Vs Alcohol Risks 50:01 Road Design Harm Reduction 51:40 Road Rage And Crutches 53:31 Grant Funding Reality 56:30 Why This Work Matters 58:11 Health Risks And Research Limits 01:00:24 Final Safety Takeaways 01:01:25 Wrap Up And Next Topics
Connect with Dr. Denise Valenti Dr. Denise A. Valenti, OD, FAAO Founder & President, IMMAD LLC Impairment Measurement Marijuana and Driving 🔗 Connect with Denise on LinkedIn: https://www.linkedin.com/in/denise-a-valenti-53b72516/ 🔬 Learn more about IMMAD: www.immadroadside.com IMMAD is focused on the development of objective technologies for identifying marijuana-related impairment, including visual functions relevant to safe driving.
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