The Loaner Tray With No Reliable Washer
At 14:10 on a Friday, a 42-piece orthopedic loaner tray arrives in decontamination with dried blood visible inside the cannulations of two reamers and a hardened film, possibly bone cement, on the tray mat. The vendor's written instructions for use travel with the tray and specify the cleaning steps. Earlier in the week, an ATP swab of a similar loaner read 150 RLU against the department's pass threshold of 45. The washer-disinfector that would normally run this tray logged a failed detergent-conductivity alarm on day shift; maintenance says the unit is "probably fine," and the OR has the case scheduled for 07:00 Saturday.
1. Walk through how you would process this tray from receipt to the point it is ready for assembly. Where does the failed conductivity alarm change your plan?
Read the worked answer
Do not treat the alarm as a nuisance. A detergent-conductivity failure means the washer may have run with no detergent or at the wrong concentration, so the cleaning efficacy of any cycle in that unit is unverified. "Probably fine" is not a release criterion.
Sequence:
- Don PPE (gown, gloves, mask, eye protection) and keep the tray contained to the dirty side.
- Disassemble per the vendor IFU that traveled with the tray - this is your controlling document, not department habit.
- Manually clean the reamer cannulations with a brush sized to the lumen (it should pass through with visible resistance at the far end), flushing with detergent and then rinsing.
- Remove the hardened film using only what the IFU permits. Metal scrapers on an anodized or coated surface can create scratches that harbor bioburden - a cleaning failure you have now built into the instrument.
- Mechanical cleaning/disinfection only in a unit that has passed its monitoring, or by the alternative method the IFU validates.
Options for the broken washer: run the tray in a different washer-disinfector with verified cycle parameters and chemistry, or perform the manual clean the IFU validates and document the deviation. Overriding or silencing the alarm, or running "just this once," converts an equipment problem into an unverifiable patient-safety problem.
2. The ATP reading of 150 RLU on a similar tray - what does that number mean and what must happen before this tray leaves decontamination?
Read the worked answer
ATP is a rapid screen for organic residue, not a sterility test. Three times the facility's own pass threshold on the same class of loaner tray means the cleaning process, not just one instrument, is suspect.
Actions:
- Re-clean the tray; do not simply re-swab until you get a passing number. Re-swabbing without re-cleaning is data laundering.
- Root-cause the pattern: brush diameter too small for the lumens, water temperature or quality out of range, detergent dosing, tray mat blocking spray, or the vendor's IFU being unrealistic for the soil present.
- Retest after re-cleaning and document both results.
- Escalate the trend to the manager. A repeat failure is a process signal, and the fix belongs to the department, not to the technician's wrist.
A tray leaves decontamination only when the cleaning method is documented as performed per the IFU and verified by your facility's criteria.
3. What documentation and communication should exist before the 07:00 case, and who needs to know what?
Read the worked answer
Document: the vendor IFU followed, the cleaning method used (manual versus mechanical, which machine), the conductivity alarm and how it was resolved, ATP results before and after re-cleaning, the technician's initials, date and time.
Communicate:
- Notify the OR charge nurse early that the loaner tray is under extended reprocessing, so the 07:00 start can be managed. Late surprises at 06:45 are a system failure, not an OR problem.
- Notify the supervisor and biomedical/equipment maintenance about the washer alarm in writing.
- Notify the vendor representative if the tray cannot be made ready in time.
Do not release the tray on the assumption that the OR "needs it," and do not send it forward for assembly with a cleaning step documented as unverified. A documented delay is defensible; an undocumented shortcut is not.