Positive Spore Test With a Full Weekend Ahead
Friday, 4:15 p.m. The weekly biological indicator for the office autoclave (Geobacillus stearothermophilus) is positive. The log shows three loads since the last negative test: Monday (instruments for two restorative procedures), Wednesday (a minor excision tray), and Friday morning (prophy handpieces and mirror handles). Cycle printouts for all three show the correct time, temperature, and pressure. The Friday load is still on the shelf, unopened. The provider is finishing her last patient; the office reopens Monday at 8:00 a.m. with a full schedule. The autoclave manufacturer's instructions say to quarantine loads back to the last negative test and to retest before returning the unit to service.
1. What do you do with the autoclave and with each of the three loads tonight, and why not the same action for all three?
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Take the unit out of service immediately: tag it, stop using it, and notify the provider and the infection-control lead. Quarantine the Friday load - it was never used, so the only right answer is to hold it.
The reused loads are the harder call. Cycle parameters were within range, which matters but does not clear them; a positive spore test means the process failed validation. Reprocess what can be reprocessed (Friday load, and any Monday/Wednesday instruments still on hand). For instruments already used on patients, the decision is not the MA's alone: escalate to the provider and infection-control lead, and follow written policy plus the manufacturer's and any applicable public-health guidance on recall and patient notification. Do not silently restock the shelf, and do not decide unilaterally that "the patients are probably fine."
2. The practice owner says a positive spore test "happens all the time" and wants to just rerun the test Monday and keep the weekend schedule. How do you respond?
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Agree on the fact and disagree on the inference. A single positive can be a false positive from technique, contaminated indicator, or a control problem - which is why the correct response is investigation, not panic and not dismissal. But you investigate with the unit out of service, using the manufacturer's retest protocol (typically three consecutive negatives, with a control) before the unit returns to patient use.
Monday's schedule is a leadership decision about alternatives - borrow a validated autoclave, use only pre-sterilized single-use or outside-processed items, or reschedule - made by the provider and manager with the facts in hand. Your role is to make the facts unavoidable and to get the refusal to follow policy documented in writing, not to quietly comply because the schedule is inconvenient.
3. What documentation and follow-up close this out correctly?
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Log the positive result with date, time, lot, and unit identifier; the quarantine of each affected load with its cycle printout and load contents; the removal from service; who was notified and when; the retest sequence and results; and the final clearance to return to service, signed by the responsible person.
Track the used items to the patient level if any notification is required, and record that notification or the clinical rationale for not notifying. Keep the manufacturer's instructions and the office policy in the file as the basis for the actions taken. The test of good documentation here is whether someone reading it in six months can reconstruct who knew what and when - and whether the practice can show that the same load was not reprocessed and quietly returned to the shelf.