Mislabeling a specimen falls under which phase of laboratory testing?

• A. Analytical phase
• B. Post-analytical phase
• C. Quality control phase
• D. Pre-analytical phase

Answer: (D)

Mislabeling a specimen happens in the pre-analytical phase, the stage before any testing is performed. This phase covers patient identification, proper specimen collection, labeling, transport, and handling. If a specimen is mislabeled, the test results can be linked to the wrong patient or the wrong test, leading to potentially dangerous outcomes and often requiring recollection. The analytical phase is where the actual measurement or analysis of the specimen occurs, and the post-analytical phase covers reporting and interpreting the results. Quality control is a set of procedures within the workflow to ensure accuracy, not a separate testing phase.