Overview
Hemovigilance is the quality-system surveillance loop that captures confirmed reactions, near misses, donor-side lookback triggers, and product recalls, aggregates them across patients and time, and analyzes them for shared root causes and trends that feed corrective and preventive action, distinct from the case-level reaction investigation and reporting covered in Module 7.
Classification
| Input type | Typical trigger |
|---|---|
| Confirmed reaction | Completed workup and report |
| Near miss | Error caught before reaching the patient |
| Donor-side lookback | Post-donation infectious-marker or health finding |
| Product recall | Supplier/manufacturer-identified issue |
Morphologic Features
Not a cell-morphology topic, this is a quality-surveillance systems reference.
Laboratory Characteristics
- Aggregates events across patients, donors, products, and time, does not replace single-case workup or reporting
- Near misses are a required input, not an optional add-on, because they reveal hazards before harm occurs
- The aggregate-review step (analyzing events together) is distinct from and additional to individual event closure
- Identified patterns are meant to feed forward into CAPA, not stop at analysis
Reference Intervals
Not applicable, qualitative surveillance-systems reference. Specific reporting frameworks, review schedules, and national/international hemovigilance program structures are institution- and jurisdiction-specific; verify current adoption.
Clinical and Laboratory Significance
Aggregate hemovigilance review is what allows a shared root cause, a recurring identification error, a problematic donor, a defective lot, to be detected and corrected before it produces the next patient's reaction, protecting patients who have not yet been affected.
Differential Considerations
Distinguish reporting (case-level classification and disposition of one completed workup, Module 7) from hemovigilance (aggregate, multi-event surveillance for patterns), the two are connected but perform different functions and should not be conflated on an exam or in practice.
Comparison Tables
Reporting vs. hemovigilance
| Function | Level | Output |
|---|---|---|
| Reaction workup and reporting (Module 7) | Single case | Classification, disposition, filed report |
| Hemovigilance surveillance (this lesson) | Aggregate, system-level | Pattern/trend signal feeding CAPA |
Classification Frameworks
Not applicable, quality-surveillance systems reference, not a disease classification.
Laboratory Notes
- Log near misses with the same seriousness as confirmed reactions, both are hemovigilance inputs
- Perform aggregate review on a defined schedule, not only after a dramatic event
- Treat an identified pattern as incomplete until it has fed forward into CAPA
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).
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