Overview
Calibration aligns instrument or assay measurement response to a known standard or reference. Verification confirms that performance still meets defined acceptance criteria. Neither term should be used as a loose synonym for daily QC or full method validation.
Classification
| Term | Core question |
|---|---|
| Calibration | Is the measurement aligned to a known standard? |
| Verification | Does performance still meet expected criteria? |
| Routine QC | Did today's controls/run checks pass? |
| Method verification | Does this established method perform as expected in our lab? |
| Validation (intro) | What is the performance of this new/modified method? |
Morphologic Features
Not applicable, this entry covers calibration/verification concepts, not morphologic identification.
Laboratory Characteristics
- Schedules and materials are SOP- and manufacturer-defined
- Controls are not automatic substitutes for calibrators
- Failed or overdue calibration/verification → hold affected testing
Reference Intervals
Not a patient reference interval. Acceptance limits for calibration and verification checks are device-, assay-, and SOP-specific.
Clinical and Laboratory Significance
Uncalibrated measuring systems and skipped assay calibrations can bias quantitative molecular results or reaction setup volumes even when a single QC set appears acceptable.
Differential Considerations
If a quality gap is found, decide whether the missing activity was calibration, performance verification, routine QC, method verification, or validation, then follow the matching SOP path.
Comparison Tables
Calibration language checkpoints
| Statement | Safe understanding | Unsafe shortcut |
|---|---|---|
| Controls passed | Today's QC may be acceptable | Treat as completed calibration |
| Pipette sticker expired | Remove from patient use until cleared | Keep using because runs look fine |
| New/modified method | Validation pathway (intro) per institutional process | Call daily QC 'validation' |
Classification Frameworks
Not applicable . WHO disease classifications do not define molecular calibration terminology.
Laboratory Notes
- Use the SOP's exact activity name
- QC ≠ calibration ≠ verification ≠ validation
- Hold testing when required calibration/verification is unmet
References
Authoritative textbooks, guidelines, and reviews supporting this reference entry. Verify reference intervals, critical limits, and reflex criteria against institutional protocols and current guideline editions.
Textbooks
- McPherson RA, Pincus MR. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Elsevier; 2021. (Molecular diagnostics chapters, verify current edition.)
- Buckingham L. Molecular Diagnostics: Fundamentals, Methods, and Clinical Applications. 3rd ed. F.A. Davis; 2019. (Verify current edition.)
CLSI and Professional Guidelines
- Clinical and Laboratory Standards Institute (CLSI). Consult current CLSI molecular method documents available through your laboratory, document numbers and editions change; do not treat any single CLSI title as universal.
- Institutional molecular laboratory SOPs, assay manufacturer instructions for use (IFU), and locally adopted accreditation requirements. Always verify current local practice.
Frequently Asked Questions
Common questions about using this Calibration and Verification additional test references Medical Laboratory Library reference in Medical Laboratory Science education.
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Calibration and Verification is a Additional Test References entry in the LabPedia Medical Laboratory Library, written for Medical Laboratory Science reference lookup.
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