The MRO

What is an MRO? The position of Medical Review Officers was first outlined in 1988 within the US Federal Department of Transportation’s drug testing regulations.1 Since then, it has become an integral and necessary part of workplace drug testing procedures across the...

Understanding Lab Results – Part 2

Part II: Interpreting Results What happens once the sample has been tested? While the measurement of compounds found in samples can be a precise science, the interpretation of those results is ultimately decided by clinicians in consult with a laboratory toxicologist....

Understanding Lab Results – Part 1

Part I: Definitions and Uses What is a cut-off? Cut-offs are used in drug testing as a measure to determine a positive or negative result. If the drug being tested is present in amounts above the predetermined cut-off level, it is considered positive, and if below,...