Overview
Clinical chemistry workflow is the controlled sequence of activities from test order through specimen handling, analysis, verification, and result communication.
Classification
| Phase | Starts | Ends |
|---|---|---|
| Preanalytical | Order / collection | Specimen ready for analysis |
| Analytical | Assay measurement | Raw/instrument result available |
| Postanalytical | Verification decisions | Reported/notified/corrected result |
Morphologic Features
Workflow reference, not morphologic.
Laboratory Characteristics
- Barcode custody and pending queues
- QC and verification holds
- Critical notification documentation
- Corrected report pathways
Reference Intervals
Workflow does not define intervals, but postanalytical systems must apply the correct interval set during verification.
Clinical and Laboratory Significance
Reliable workflow delivers timely, correctly identified chemistry results that clinicians can act on safely.
Differential Considerations
When results are late or wrong, classify the defect by phase before assigning blame to a single instrument.
Comparison Tables
Delay classification
| Delay type | Example | Acceptable? |
|---|---|---|
| Quality-required | QC 1-3s investigation | Yes, required |
| Process bottleneck | Centrifuge queue | Improve process |
| Unsafe shortcut | Release despite QC fail | Never |
Classification Frameworks
Not applicable.
Laboratory Notes
- Timestamp handoffs when investigating TAT failures
- Respect analyte stability for add-on testing
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
- Rifai N, Horvath AR, Wittwer CT, eds. Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. 8th ed. Elsevier; 2022.
- McPherson RA, Pincus MR. Henry's Clinical Diagnosis and Management by Laboratory Methods. 24th ed. Elsevier; 2021.
- Bishop ML, Fody EP, Schoeff LE. Clinical Chemistry: Principles, Techniques, and Correlations. 9th ed. Jones & Bartlett; 2022.
CLSI and Professional Guidelines
- Clinical and Laboratory Standards Institute. Defining, Establishing, and Verifying Reference Intervals in the Clinical Laboratory; Approved Standard. CLSI document EP28-A3c. CLSI; 2010.
- Clinical and Laboratory Standards Institute. Collection of Diagnostic Venous Blood Specimens. CLSI standard GP41. CLSI.
Frequently Asked Questions
Common questions about using this Chemistry Laboratory Workflow foundational topics Medical Laboratory Library reference in Medical Laboratory Science education.
What is the Chemistry Laboratory Workflow laboratory reference?
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Can reference details vary between laboratories?
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