Positive Biological Indicator with Implants Already Released
At 09:10, the microbiology report shows a positive biological indicator (BI) for load 4471, processed at 06:00 in pre-vacuum steam sterilizer #3 at 270 F for 4 minutes with a 20-minute dry time. The load contained 12 trays; three trays included loaner implants. By 09:30, the OR has already opened two trays from load 4471, and two later loads (4472 and 4473) have been processed and moved to sterile storage. The sterilizer log shows all physical parameters in range, a passing Bowie-Dick test at 05:30, and the BI control is negative. The implant trays were released at 07:00 because 'the chemical indicator turned black.'
1. What immediate recall and notification steps are required?
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A positive BI means the load is not sterile. Immediately quarantine load 4471 and notify the OR to stop using any items from it. Retrieve all trays from the load, including the two opened trays and the implant trays. Notify infection prevention, risk management, and the sterilizer supervisor. Place sterilizer #3 out of service. Do not release any implant from that load. Because two later loads were processed, quarantine 4472 and 4473 as well until the scope is determined. Document notifications, times, and item disposition.
2. What is the scope of the recall, and how should the implant trays be handled?
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The recall scope should include load 4471 and all loads processed since the last negative BI for that sterilizer, plus any load that could have been affected by the same fault. Retrieve items from the OR, sterile storage, and distribution. Implant trays from a positive BI load require special follow-up; they should not be implanted. If an implant was already implanted, notify the surgeon and infection prevention immediately and follow facility policy. Do not rely on the chemical indicator; a passing CI does not override a positive BI. Quarantine all recalled items and reprocess only after the sterilizer is cleared.
3. What root-cause investigation and release criteria should be applied before the sterilizer returns to service?
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Investigate the sterilizer, steam supply, air removal, loading pattern, packaging, BI lot, incubator, and test controls. Verify the Bowie-Dick test, physical parameters, and maintenance records. Repeat the BI with a control; the sterilizer should remain out of service until a negative BI and a satisfactory mechanical and chemical check are obtained. Review whether the implant load was released improperly and correct the release policy. Document corrective actions and retraining. Return to service only per facility policy and manufacturer recommendations.