An audit-ready autoclave log carries fourteen fields, and a reviewer who opens it is checking three things: that every cycle was monitored, that every failure drew a documented response, and that the record was written as the cycle ran. Missing fields are the most frequent finding in sterilization record reviews. The list below runs in review order, with the reason each field exists.
Quick facts
- In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day it is used — daily monitoring, not weekly.
- The weekly baseline is the CDC / AAMI ST79 standard in most US states.
- One sterilizer monitored daily, five days a week, needs roughly 250 indicators a year.
- The sheet is completed per cycle, not at the end of the week.
Why the log is the first document a reviewer asks for
The log is the only record that connects a load of instruments to the cycle that released it. Service records, indicator strips and pouch labels support the story, but the log shows whether every cycle was monitored or only most of them.
The 14 fields, in review order
The table sets each field against the reason a reviewer looks for it.
| # | Log field | Why it is checked | Common gap |
|---|---|---|---|
| 1 | Date and time | Proves monitoring on each use day | Time omitted |
| 2 | Sterilizer identifier | Separates each unit | Only one unit listed |
| 3 | Cycle type | Confirms the right cycle for the load | Generic "steam" entry |
| 4 | Cycle or run number | Links the load to a sequence | Numbering restarts |
| 5 | Load description | Shows what was processed | Blank or "misc" |
| 6 | Temperature reached | Confirms the set point was met | Copied across rows |
| 7 | Exposure or hold time | Confirms the cycle completed | Estimated value |
| 8 | Chemical indicator result | Load-level process control | Tick with no reading |
| 9 | Biological indicator lot and result | Drives release under daily monitoring | Lot not recorded |
| 10 | Bowie-Dick result | Air removal evidence for porous loads | Not run or not logged |
| 11 | Operator initials | Identifies who released the load | Shared initials |
| 12 | Pass, fail and release decision | Shows the load was released or held | Decision implied only |
| 13 | Action after a failure | Links a failed cycle to a response | No follow-up row |
| 14 | Service and maintenance | Confirms the unit was maintained | Kept in another file |
The biological indicator result and the release decision carry the most weight, because they are the ones most often filled in from memory.
mds autoclave maintenance guide
Maintenance entries belong beside the cycles they affect rather than in a separate binder. A reviewer reading the log as a maintenance guide looks for service dates, the work completed and the return-to-service sign-off.
Filling all 14 fields in under a minute
Print the fields in the order the operator works, not the order a reviewer reads. Pre-print the sterilizer identifier, cycle type and operator name, so only the values that change per run are left to write.
- Write the release decision at the moment of release, never later.
- Keep a roll of autoclave indicator tape at the bench so the chemical result is recorded while the pack is in hand.
- File each day's sheet rather than collecting loose pages.
To test a new sheet for a month, the CliniEco biological indicator 5-pack trial covers the start of a monitoring routine.
Daily, weekly and the provincial difference
In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day it is used — daily monitoring, not weekly. The weekly baseline is the CDC / AAMI ST79 standard in most US states, which is where the confusion usually starts.
The daily requirement is the one clinics under-document, because it looks like more testing than the unit seems to need. It is not optional, and it applies for each cycle type used that day. Budget for it with a 25-pack of 24-hour self-contained biological indicators that covers every day the unit runs.
One sterilizer, monitored daily, five days a week, across roughly fifty working weeks, consumes about 250 indicators a year.
Three gaps that turn into findings
- Blank cells for cycles that ran. A missing row implies an unmonitored load.
- One result for several cycles. One entry cannot cover a full day of runs.
- Failures with no follow-up. A positive result needs a retest and a note on what changed.
Acronyms on the sheet such as SAL, CI and BI are defined in the sterilization acronym guide, provincial differences in what gets logged are compared in the multi-provincial documentation guide, and the log rebuilt after an inspection is covered separately. The sterilization and compliance hub collects the rest.
Ordering for a clinic, lab or care home? Wholesale and multi-site ordering covers case pricing and account setup, and the B2B wholesale collection lists the lines stocked for institutional buyers.
Related reading · autoclave log template
- Multi-provincial sterilization documentation: what Ontario, BC and Alberta clinics log
- Rebuilding a sterilization log after a public health inspection
- Sterilization and compliance hub
Frequently Asked Questions
How long must autoclave logs be kept in Canada?
Retention rules follow provincial guidance, and many clinics hold records for the period their regulator expects. Confirm the number for your province and write it on the sheet.
How often does Ontario require a spore test?
In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day it is used — daily monitoring, not weekly — so the record must show a daily entry rather than one test a week.
Can one log sheet cover two sterilizers?
Only if every row names the sterilizer, the cycle type and the operator. Separate columns per unit are clearer and stop a reviewer assuming one unit was missed.
What should happen after a failed biological indicator?
The sterilizer is held out of service until the cause is corrected and a retest passes, loads from the affected period are recalled for reprocessing, and the failure and corrective action are written into the log.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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