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This table summarizes information useful in the interpretation of drugs-of-abuse assays. It was originally developed by the late Daniel M. Baer, MD, and updated by Richard A. Paulson, MT(ASCP), supervisor of Chemistry and Toxicology, VA Medical Center, Portland, OR.
CUTOFF AND TOXICITY LEVELS FOR DRUGS-OF-ABUSE TESTING. Th is table summarizes information for the interpretation of drugs-of-abuse assays; originally developed by the late Daniel M. Baer, MD, and updated by Richard A. Paulson, MT(ASCP), supervisor of Chemistry and Toxicology, VA Medical Center, Portland, OR. Th e table is updated annually and ...
Urine, blood, hair, saliva, sweat, and nails (toenails and fingernails) are some biological specimens used to perform laboratory drug testing, and they provide different levels of specificity, sensitivity, and accuracy. Urine is most often the preferred test substance because of ease of collection.
18 mar 2017 · Although urine pH fluctuates throughout the day, it generally ranges between 4.5 and 8. Specific gravity normally ranges between 1.002 and 1.030. In normal human urine, creatinine concentrations should be greater than 20 mg/dL.
Urine drug testing generally requires a minimum of 30 mL of urine (depending on the kit type) collected in a private restroom. In the authors’ experience, the sample collection most often is unobserved in clinical practice. Most laboratories keep urine samples for a limited time, often 7 days.
Analysis for a wide range of opioids is now required in the context of the prescription opioid epidemic. Testing methods have also been primarily based upon urine screening; however, methods for analyzing alternative samples such as saliva, sweat, and hair are available.
§ 26.163 Cutoff levels for drugs and drug metabolites. (a) Initial drug testing. (1) HHS-certified laboratories shall apply the following cutoff levels for initial testing of specimens to determine whether they are negative or positive for the indicated drugs and drug metabolites, except as specified in paragraph (a)(2) of this section or the ...
