Overview
Auditing is the structured internal or external process of sampling records or observed practice, comparing them against current SOP, classifying any discrepancy as a documentation gap or a genuine process failure, and routing every finding, regardless of severity, into a documented corrective action with an owner and a planned effectiveness check.
Classification
| Audit type | Driven by | Typical predictability |
|---|---|---|
| Internal audit | Laboratory's own quality program | Scheduled, self-initiated |
| External audit | Accreditation body or regulator | Often less predictable; may be unannounced |
Morphologic Features
Not a cell-morphology topic, this is a quality-audit process reference.
Laboratory Characteristics
- Every audit step (planning, sampling, comparison, classification, reporting) matters, skipping reporting for a minor finding breaks the cycle
- Classification should follow available evidence, not a default assumption that documentation issues are always low-risk
- Every finding gets a documented corrective action with an owner and target date, not just an informal same-day fix
- A planned effectiveness check closes the loop; without it, the finding is not fully resolved
Reference Intervals
Not applicable, qualitative process reference. Specific sample sizes, audit frequencies, and accrediting/regulatory audit triggers are institution- and framework-specific; verify against current SOP and applicable standards.
Clinical and Laboratory Significance
Internal auditing catches drifting practice and outdated procedures between external assessments, problems that could otherwise persist unnoticed for a long time and directly affect patient safety.
Differential Considerations
Distinguish a documentation gap (corroborating evidence shows the task was actually performed) from a genuine process failure (no evidence the task was performed as required), each requires a different corrective-action target: recording practice versus the underlying process itself.
Comparison Tables
Classifying an audit discrepancy
| Evidence pattern | Likely classification | Corrective-action focus |
|---|---|---|
| Corroborating log/record confirms task was done | Documentation gap | Recording practice / form design |
| No corroborating evidence task was ever done | Genuine process failure | The underlying process itself |
Classification Frameworks
Not applicable, quality-audit process reference, not a disease classification.
Laboratory Notes
- Do not default every discrepancy to 'just paperwork', check for corroborating evidence before classifying
- Document and route every finding, however minor, into the corrective-action process
- Plan the effectiveness check at the time the corrective action is assigned, not as an afterthought
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
- Cohn CS, Delaney M, Johnson ST, Katz LM, eds. Technical Manual. 21st ed. AABB; 2023.
- Harmening DM. Modern Blood Banking & Transfusion Practices. 7th ed. F.A. Davis; 2019.
CLSI and Professional Guidelines
- AABB. Standards for Blood Banks and Transfusion Services (verify current edition and institutional adoption).
- U.S. Food and Drug Administration. Code of Federal Regulations Title 21 . Blood and Blood Components (verify current institutional adoption).
- Clinical and Laboratory Standards Institute. Related immunohematology and specimen identity standards (verify current documents and institutional adoption).
Frequently Asked Questions
Common questions about using this Blood Bank Auditing foundational topics Medical Laboratory Library reference in Medical Laboratory Science education.
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