Overview
A mislabeled specimen is one where the identifying information on the label does not match the accompanying requisition, order, or other identity source, meaning the laboratory cannot currently confirm whose specimen it is. It must be resolved through verification or recollection, never by editing the label to match a request.
Classification
| Decision checkpoint | Action |
|---|---|
| Label/requisition identity mismatch found | Stop processing immediately |
| Verbal request to relabel received | Decline; identity cannot be verified this way |
| Recollection possible | Request new specimen with correct identification |
| Recollection not possible | Follow local SOP discrepancy pathway exactly |
| Event resolved | Document as an identification incident or near miss |
Morphologic Features
Not applicable, this entry covers a specimen identification process, not cell or tissue morphology.
Laboratory Characteristics
- Usually originates at collection (label, bedside verification, or paperwork step)
- May involve one tube or a batch collected in the same round
- Requires escalation and often a supervisor or patient-safety contact per SOP
Reference Intervals
Not applicable as a patient reference interval. Discrepancy handling and rejection criteria are defined by local laboratory identification procedures.
Clinical and Laboratory Significance
A mislabeled specimen has no diagnostic value by itself, its significance is the risk of attaching a result to the wrong patient, which can drive an incorrect clinical decision for one patient while leaving another without a needed result.
Differential Considerations
Distinguish a likely transcription or spelling error from a genuine wrong-patient collection, and distinguish an isolated mismatch from a broader batch labeling mix-up, all require verification through SOP, not assumption of which is more likely.
Comparison Tables
Identification mismatch checkpoints
| Pressure point | Safe response | Unsafe shortcut |
|---|---|---|
| Ward asks to relabel to save time | Decline; explain why identity must be verified, not assumed | Relabel the tube to match the request |
| Patient discharged or unavailable | Follow SOP discrepancy pathway; escalate as needed | Skip recollection because it's inconvenient |
| Testing already partly done | Halt and review; do not release affected results | Finish testing and release results anyway |
Classification Frameworks
Not applicable . WHO disease classifications do not define specimen identification incident handling.
Laboratory Notes
- Stop processing; never relabel on a verbal request
- Escalate per SOP and request recollection whenever possible
- Document as an identification incident or near miss
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. (Laboratory quality and management chapters, verify current edition.)
CLSI and Professional Guidelines
- Institutional laboratory SOPs, locally adopted quality policies, and manufacturer instructions for use (IFU). Always verify current local practice.
Frequently Asked Questions
Common questions about using this Mislabeled Specimen additional test references Medical Laboratory Library reference in Medical Laboratory Science education.
What is the Mislabeled Specimen laboratory reference?
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