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zakkaz
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More useless drug tests
#26412506 - 01/02/20 01:10 PM (4 years, 27 days ago) |
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https://phys.org/news/2019-11-bioengineers-quick-saliva-based-marijuana.html
"Do we have technologies that, if you do a rapid screen at a roadside stop, can determine THC levels accurately?"
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theRealrollforever
I DID-DENT



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Re: More useless drug tests [Re: zakkaz] 1
#26412594 - 01/02/20 01:59 PM (4 years, 27 days ago) |
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Pointless but not useless. They will use them to make thc duis a regular thing and make mad $$$ I hope they can’t figure it out it’s bad enough they can get blood if you aren’t careful on the road
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Holybullshit
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Cutoff levels will probably be based around a zero tolerance mindset and garnished from tests involving THC naive individuals...there is a not small chance that when this technology comes to fruition that chronic/heavy cannabis users will fail the test 24/7 regardless of their recent use or their preparedness to drive.
I think this is a much harder thing to accomplish in good faith than people might think...cannabis has much different effects on ones ability to drive than alcohol and the way time and dose relate to motor skills is hardly linear. If they do go with a "zero tolerance" limit in mind, I have no doubt that people will fail many hours after consumption despite having returned to a state where they can drive capably some time ago.
Detecting THC levels accurately is not the same thing as accurately detecting its impact on ones ability to drive. Given the complicated pharmacokinetics of active THC, its far from linear effect on motor skills, large impact of tolerance on ones susceptibility to it, and the ability, if not requirement, to use it chronically...I don't really see any possible way this can be applied fairly in a way resembling vapor based BAC tests.
Perhaps it could be used as an investigative tool, but it should hardly be the determining factor in an arrest...if allowed to be used as evidence at all.
Edited by Holybullshit (01/03/20 09:04 AM)
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Tiberjuggaligger
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This is not nearly as promising as this:
https://www.today.com/video/see-a-1st-look-at-the-marijuana-breathalyzer-71058501749
When comparing the two, the saliva based test seems like a step backwards or perhaps forward in the same direction as testing has always went. The breathalyzer has a 2-4hr window of detection, of recent use, not the metabolites in your blood. A much superior tool.
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Kirk: What does God need with a starship? McCoy: Jim, what are you doing? Kirk: I'm asking a question. "God": Who is this creature? Kirk: Who am I? Don't you know? Aren't you God? Sybok: He has his doubts. "God": You doubt me? Kirk: I seek proof. McCoy: Jim! You don't ask the Almighty for his ID
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Doc9151
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Quote:
Holybullshit said: Cutoff levels will probably be based around a zero tolerance mindset and garnished from tests involving THC naive individuals...there is a not small chance that when this technology comes to fruition that chronic/heavy cannabis users will fail the test 24/7 regardless of their recent use or their preparedness to drive.
I agree, I've tested positive 3 months after quitting, doc said that I was off the scale on the first test.
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Holybullshit
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Quote:
Tiberjuggaligger said: The breathalyzer has a 2-4hr window of detection, of recent use, not the metabolites in your blood. A much superior tool.
I just wonder how that will work with tolerance. As with alcohol we have determined that tolerance does not have enough of an affect to enable someone to be more prepared to drive after consuming, this problem is more straightforward because of the way alcohol affects ones motor skills, reaction times, and decision making(one can not accurately judge their own ability to drive after alcohol consumption due to lowering of inhibition, cannabis does not have this effect to nearly the same degree); and that tolerance so alcohol is not as concrete as to cannabis and does not widen the gap of active dosage between chronic and irregular user nearly as much as with cannabis.
So with alcohol we have correctly decided to ignore tolerance, and disregard ones ability to self-assess. And since alcohol is purely a recreational substance we can do this worry free.
Cannabis doesn't affect ones ability to drive in quite the same way, and tolerance builds in a way where a dose which could have a cannabis naive person stupidly stoned will do absolutely nothing to someone with a tolerance. And due to the way the body eliminates said compounds(half-life), a 2-4hr detection window for a cannabis naive individual based around threshold dosing....could mean a high tolerance user could ingest enough to receive the same perceptual changes yet still fail the test 8-10 hours later.
Basically, with alcohol no one is going to have a tolerance where they can ingest 4-6x the amount of someone who rarely imbibes before impairment becomes measurable...with cannabis 1-2 puffs is enough to sideline a cannabis naive, or low tolerance, individual for 2-4 hours...whereas 6 puffs may just get a high tolerance individual buzzed, yet it could triple the detection window.
For oral consumption the problem is even trickier, one could be taking (relatively)low oral doses medicinally in the morning, to the point where their ability to drive is not impacted, or before bed, and due to the pharmacokinetics fail said test 12-16+ hours later.
Edited by Holybullshit (02/01/20 09:52 AM)
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Doc9151
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tolerance has nothing to do with it, it's based on blood concentrations. They could care less if you can drink a 1/5th and walk a line if your blood alcohol levels are above .08
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Edited by Doc9151 (02/10/20 12:48 PM)
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valiant
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Re: More useless drug tests [Re: Doc9151]
#26477960 - 02/10/20 04:34 AM (3 years, 11 months ago) |
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There's not enough ganja in the world to stop me from driving, but if I misplace my glasses I'm staying in. Based on known strains, I'm not familiar with train wreak though. I'm sure there's strains that improve driving.
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Edited by valiant (02/10/20 04:38 AM)
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