What distinguishes a screening sequence from reflex testing in drug analysis?

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Multiple Choice

What distinguishes a screening sequence from reflex testing in drug analysis?

In drug analysis workflows, screening sequences use a broad, sensitive test to cast a wide net and flag potential positives quickly, typically an immunoassay. When this initial screen yields a positive result, laboratories automatically perform reflex testing with a highly specific confirmatory method, such as GC-MS or LC-MS/MS, to identify the exact drug and verify its presence. This two-step approach minimizes false positives and provides results that are reliable for reporting. Choosing to perform reflex testing before screening would miss the purpose of the initial broad screen. Treating reflex testing as replacing the initial screen ignores the need for wide detection, and treating screening and reflex testing as the same step misrepresents their distinct roles in detection versus confirmation.

In drug analysis workflows, screening sequences use a broad, sensitive test to cast a wide net and flag potential positives quickly, typically an immunoassay. When this initial screen yields a positive result, laboratories automatically perform reflex testing with a highly specific confirmatory method, such as GC-MS or LC-MS/MS, to identify the exact drug and verify its presence. This two-step approach minimizes false positives and provides results that are reliable for reporting.

Choosing to perform reflex testing before screening would miss the purpose of the initial broad screen. Treating reflex testing as replacing the initial screen ignores the need for wide detection, and treating screening and reflex testing as the same step misrepresents their distinct roles in detection versus confirmation.

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