To Milo / FlyBoy / Tools.....There is a common thread among all of us here. The way the dry spot blood test is being administered by the lab employee is skewing the test. The fact that on these past 2 separate occasions (the only 2 conducted here in the states), my husband had to walk the lab tech on how to administer the dry blood spot (DBS) test is troubling. Each time he got blowback on it by the tech. Mind you, these were USDTL recommended facilities administering their Peth test.
So it begs the question, is USDTL doing an audit of these labs they contract with and ensuring that lab techs are following the procedures and administering USDTL'S DBS test properly? If they are auditing, how often is it happening? Is there faulty manufacturing of the DBS cards?
Is the actual Peth test too sensitive to begin with? When will there by FDA approval?
Are there problems with storage and / or transport?
The complete laisse faire attitude by the lab tech about doing the test properly is sickening. They clearly do not understand the ramifications of a positive test or in ALL our instances here a False-positive test.
Should my husband need to do yet another one of these in the states, I will go with him as an eye witness, and film the procedure being done, if possible. People's careers and children are at stake over the inaccuracy of this test.
I truly believe that people's testimony here is only the microscopic tip of the iceberg to a much larger problem with this test, and many other alcohol tests.

Where are the studies of control groups in an isolated and monitored setting that enter rehab, do an initial Peth test upon entry, then repeat the Peth test at 2, 4, 6 weeks subsequently. Plus make sure both methods are used, a blood draw and the DBS, and in addition, send out to labs other than USDTL. I have yet to come across any such research. This certainly would be worth a warranted request to USDTL to see peer review if a study like this has been done.

Wish there was a way to reach out to all unions and general public who must take this test for compliance reasons and hear other testimonials about dealing with false positive on the Peth tests. How do we report labs that are not doing procedures correctly? How do you hold labs / labs tech accountable for not doing a test properly, that can ultimately be disastrous for the individual? Apparently YES you can!!! It's called clinical laboratory malpractice.
https://www.natlawreview.com/article/drug-testing-laboratories-may-be-sued-negligence-south-carolina
The above article also references other states. "Finally, the Court was persuaded by the fact that courts in New York, Pennsylvania and Wyoming have all determined that a drug testing facility owes a duty of care to the person subject to testing."
https://www.mlo-online.com/home/article/13009490/legal-liability-in-urine-drug-testing-could-your-lab-be-exposed
My apologies for the long post.