Key Takeaways
- A failed sterilization test requires an immediate and structured response, but it does not automatically mean the entire sterilization program has failed.
- The practice should stop using affected equipment or instruments when required and follow its written procedures, provincial guidance, and applicable manufacturer instructions.
- Sterilization records help the team determine what happened, which loads may be affected, and what corrective action to take.
- The team should document every unexpected result, investigation, retest, and corrective action.
Introduction
Few situations create more stress in a dental practice than discovering a failed sterilization test. Questions arise immediately. Can the sterilizer still be used? Were any instruments affected? Does the team need to recall anything? How quickly can the problem be resolved?
In that moment, the practice does not need assumptions or improvised decisions. It needs a clear process.
A failed biological indicator, chemical indicator, or mechanical monitoring result always requires attention. However, an unexpected result does not necessarily mean every instrument processed through the sterilizer is unsafe. The appropriate response depends on what failed, the results of the other monitoring methods, the equipment involved, and the requirements that apply to the practice.
The team should first slow the process down, protect patients, and follow the practice’s written procedures. Staff should also review provincial guidance and the applicable manufacturer’s instructions for use.
1. Stop and Follow the Practice’s Written Procedure
When a monitoring result suggests that sterilization conditions may not have been achieved, the team should stop affected instruments from moving through the normal workflow.
The practice may need to remove the sterilizer from service while staff investigate the result. The team may also need to identify, separate, or quarantine packages associated with the affected load. These steps help prevent accidental use.
The exact response should follow the practice’s written procedure, provincial regulatory guidance, and the manufacturer’s instructions for the sterilizer and monitoring products.
This is why practices should establish corrective action procedures before a failure occurs. Staff should already know who to notify, how to identify affected loads, where to hold instruments, and who will manage the investigation.
A documented process prevents the team from making important decisions under pressure.
2. Confirm What Type of Monitoring Failed
Not every monitoring failure means the same thing.
Mechanical monitoring confirms whether the sterilizer reached the required time, temperature, and pressure. Chemical indicators show whether packages were exposed to specific processing conditions. Biological indicators test the sterilization process with highly resistant bacterial spores.
The team should confirm which result was unexpected and review the other monitoring information from the same cycle. A positive biological indicator with acceptable mechanical and chemical results may require a different response than a load that never reached the required temperature or pressure.
Staff should also confirm that they used the correct monitoring product, placed it properly, selected the correct cycle, and interpreted the result according to the manufacturer’s instructions.
Understanding what failed helps the practice determine what to do next.
3. Identify and Contain Potentially Affected Items
The practice should use its load records to identify which instruments or packages may be connected to the unexpected result.
Clear package labels and sterilization records make this process easier. The records should identify the sterilizer, load or cycle number, processing date, and items included in the load.
Implantable devices require particular attention. Staff should not use an implantable item from a load that has not received an acceptable biological monitoring result unless the applicable guidance and manufacturer instructions allow it.
Whether the team needs to recall, quarantine, or reprocess other instruments depends on the circumstances and the requirements that apply to the practice. Staff should not make that decision from memory or rely on a general assumption.
The written corrective action procedure, provincial guidance, and manufacturer instructions should direct the response.
4. Review the Complete Reprocessing Workflow
Once the team has controlled affected items, the investigation should look beyond the sterilizer itself.
Equipment malfunction may have caused the failure. However, incorrect cycle selection, overloading, improper package placement, unsuitable packaging, missed maintenance, or incorrect use of a monitoring product may also contribute.
The team should review the workflow from beginning to end. Was the sterilizer loaded according to its instructions? Did staff arrange packages to allow proper circulation? Did they select the correct cycle? Were the monitoring products compatible with the sterilizer and cycle? Did the practice complete maintenance on schedule?
The goal is not to reach a quick conclusion. The goal is to find evidence that explains what occurred and determine the correct response.
5. Review the Records and Document the Investigation
Sterilization records create the timeline needed to understand the event.
The team may need to review the cycle printout or digital record, physical parameters, chemical indicator results, biological monitoring history, equipment maintenance records, service reports, and staff training records.
The practice should also document the investigation itself. The record should explain what result was received, when staff identified it, which loads or instruments may have been affected, and what immediate actions the team took.
It should also describe the potential causes reviewed and how the practice resolved the issue.
If an inspector, regulator, or practice leader reviews the event later, the documentation should clearly show that the team took the result seriously and followed an organized corrective action process.
6. Retest Before Returning the Sterilizer to Service
The practice should not return a sterilizer to normal use simply because the team did not find a visible equipment problem.
Staff should complete retesting according to the applicable provincial guidance and the manufacturer’s instructions. If the procedure requires a repeat biological indicator, the team should use the correct cycle and monitoring products. Staff should also confirm that the mechanical and chemical results are acceptable.
If repeat testing remains positive or another monitoring problem continues, the practice should keep the sterilizer out of service. A qualified technician may need to inspect or repair the equipment before the team tests it again.
The practice should add all service, repair, and retesting activity to its records.
7. Review the Event With the Team
Once the immediate issue has been resolved, the practice should review the event with everyone involved in reprocessing.
The discussion should focus on what occurred, how the response procedure worked, and whether any part of the process needs clarification or improvement. If the investigation identifies a gap in training, loading, documentation, monitoring, or maintenance, the practice should provide and document refresher training.
The purpose is not to assign blame. It is to make sure every team member understands and follows the correct process.
A failed test may reveal weaknesses that would otherwise remain unnoticed. Addressing those weaknesses helps the practice build a more reliable sterilization program.
How Sowingo Helps Practices Respond With Confidence
A failed sterilization test becomes much harder to investigate when cycle records, monitoring results, maintenance documents, and corrective actions live in different places.
Sowingo’s sterilization and compliance software centralizes sterilization documentation in one digital system. Practices can maintain organized cycle records, connect monitoring information to sterilization activity, and retrieve historical documentation during an investigation.
Digital records also make it easier to identify affected loads, review previous results, document corrective actions, and provide clear information during an inspection or internal review.
Sowingo reduces dependence on paper logs and fragmented recordkeeping. This gives the team a more consistent process to follow before, during, and after a sterilization issue.
Conclusion
A failed sterilization test should always be taken seriously, but it does not have to become a crisis.
The strongest response is immediate, structured, and supported by documentation. The practice should control potentially affected items, review all monitoring results, investigate the complete workflow, and follow provincial guidance and manufacturer instructions.
The team should also document every corrective action and retesting result.
The best time to prepare for a failed test is before one occurs. When responsibilities, procedures, and records are already organized, the team can focus on solving the problem instead of trying to determine what to do next.
Compliance Tip
Review the practice’s failed sterilization test procedure with the team before it is needed. Confirm that staff know who to notify, how to identify and quarantine affected loads, where current manufacturer instructions are stored, and how to document the investigation and corrective action.
Frequently Asked Questions
Does a failed biological indicator mean every instrument is contaminated?
Not necessarily. The appropriate response depends on the sterilization method, mechanical and chemical monitoring results, cycle circumstances, and applicable provincial and manufacturer guidance. The practice must always investigate a failed biological indicator.
Should a sterilizer be removed from service after a failed test?
The practice should follow its written procedure, provincial guidance, and the sterilizer manufacturer’s instructions. Depending on the type of failure and the surrounding monitoring results, the team may need to remove the sterilizer from service during the investigation and retesting.
Should every failed sterilization test be documented?
Yes. The practice should document the unexpected result, affected loads, investigation, corrective actions, maintenance or repairs, and retesting results.
Can failed sterilization tests be prevented?
No process can eliminate every possible equipment problem or human error. However, routine monitoring, preventive maintenance, correct loading and packaging, standardized procedures, accessible manufacturer instructions, and ongoing staff training can reduce risk.
References
- Canadian Standards Association. CAN/CSA-Z314:23 – Canadian Medical Device Reprocessing.
- Public Health Agency of Canada. Routine Practices and Additional Precautions for Preventing the Transmission of Infection in Healthcare Settings.
- Organization for Safety, Asepsis and Prevention (OSAP). Instrument Processing Best Practices.
