Quality Control Failure in a Platelet Inventory
A hospital blood bank receives a shipment of 6 apheresis platelet units. On receipt, the technologist notes that one unit's label shows an expiration date 5 days after collection, but the unit was collected 6 days ago and shipped at 20-24°C. Another unit has a small clot visible at the port. A third unit's bacterial culture bottle from the supplier is negative at 24 hours but the supplier's policy requires a 24-hour hold before release. The blood bank's SOP requires visual inspection and verification of shipping temperature. The clinician wants to transfuse the oldest unit today to a neutropenic patient with a platelet count of 5 × 10^9/L.
1. Which units, if any, are acceptable for transfusion, and what is the disposition of the unacceptable units?
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Evaluate each:
- Unit collected 6 days ago with a 5-day expiration label: Apheresis platelets stored at 20-24°C with agitation have a 5-day shelf life (FDA allows 7 days only with approved bacterial detection systems and specific labeling). A unit collected 6 days ago is expired and must not be transfused. Quarantine and discard per SOP; notify the supplier.
- Unit with a visible clot: Visual inspection is a release criterion. A clot indicates poor processing or activation; the unit is not acceptable and should be quarantined, investigated, and reported to the supplier. Do not transfuse.
- Unit with negative culture at 24 hours but supplier requires 24-hour hold: If the supplier's validated bacterial detection system requires a 24-hour hold and the unit has met that hold with a negative result, it is acceptable per the supplier's release criteria, provided shipping temperature and visual inspection are satisfactory. Verify the hold was completed before shipment.
Bottom line: Only units that are within date, clot-free, shipped at 20-24°C, and released per the supplier's bacterial detection policy are acceptable. The expired and clotted units are quarantined.
2. What shipping and storage documentation must be verified, and what regulatory/quality actions follow a temperature or dating deviation?
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Verification:
- Shipping temperature: Must be documented as 20-24°C for platelets; verify with a validated temperature indicator or data logger. If the temperature excursion is documented and outside range, the unit is quarantined pending medical director review.
- Dating: Confirm collection date, expiration date, and that the unit is within the 5-day (or 7-day with approved testing) window.
- Bacterial detection: Confirm the supplier's culture result and hold time meet the release criteria.
- Visual inspection: Document absence of clots, discoloration, or leaks.
Regulatory/quality actions:
- Quarantine deviating units and document the deviation.
- Notify the supplier and complete a product deviation report as required by FDA (biological product deviation reporting, 21 CFR 606.171) if the deviation occurred under the supplier's control.
- Internal deviation/CAPA if the issue occurred in the blood bank (e.g., receiving or storage).
- Review whether the deviation affected other units in the shipment.
- Medical director review and sign-off; consider look-back if a unit was transfused.
- CAP/AABB compliance: maintain records per retention requirements and include in quality indicator tracking.