Short answer: AAMI ST79 is the American steam sterilization guideline that replaced the older AAMI 1135 documents, and the "2014" on a datasheet is an amendment-era print date rather than the current edition. In Canada it is a technical reference, not the rulebook — CSA Z314 is the Canadian standard, and in Ontario the RCDSO expects a biological indicator test every day the sterilizer is used. Here is what the document asks of each pack, and where its authority ends.
Buyers search "aami 1135 2014 what does it mean" because the citation survives in supplier spec sheets, old checklists and training binders. The real question: which number should drive my monitoring programme?
What Is AAMI ST79, and What Happened to AAMI 1135?
AAMI ST79, Comprehensive guide to steam sterilization and sterility assurance in health care facilities, was first published in 2006. It consolidated several older AAMI recommended practices — including the steam sterilization documents that had circulated under the 1135 numbering — into one guide covering cleaning, packaging, loading, monitoring and record-keeping.
Amendments followed in 2010 and 2013, and the 2017 edition renumbered sections. So an old photocopy no longer lines up section for section, and a clause number quoted without an edition year can point at the wrong page.
What Does AAMI ST79 Require Inside Every Package?
Two chemical indicator requirements drive daily practice: an external chemical indicator on the outside of each package, and an internal chemical indicator inside each package. The external one separates processed items from unprocessed ones; the internal one shows the sterilant reached the contents. The guide also expects routine load monitoring, and a process challenge device for cycles carrying implants or complex lumened instruments.
Canadian practice borrows the same logic, but your college inspects against CSA Z314 and its own guidance. The table separates the three layers.
| Requirement | AAMI ST79 (US) | CSA Z314 (Canada) | RCDSO (Ontario) |
|---|---|---|---|
| External chemical indicator on each package | Required on the outside | Required | Expected in IPAC guidance |
| Internal chemical indicator in each package | Required inside | Required | Expected on every load |
| Biological indicator cadence | At least weekly, plus every implant load | Set by the applicable Z314 part and your regulator | Every day the sterilizer is used |
| Implant loads | Held until the result is read | Do not release unmonitored | Same principle, documented |
| Monitoring records | Kept and retrievable | Kept and retrievable | Available at inspection |
How Often Does AAMI ST79 Require a Biological Indicator?
The ST79 baseline is at least weekly biological indicator testing, plus one in every load containing implants, with those implants held until the result is read. That baseline describes American practice. Ontario sets a different expectation: the RCDSO requires a biological indicator every day the sterilizer is used, so a log showing a lighter cadence is one of the simplest gaps an inspector can see.
Read a datasheet that calls the lower frequency the standard as American practice rather than a Canadian requirement, and note that in the SOP.
Which Rules Actually Apply in Canada: ST79, CSA Z314 or the RCDSO?
Canada works from CSA Z314, the Canadian standard for reprocessing medical devices; its steam sterilization content is what a clinic SOP should be built on. Provincial colleges add their own expectations, and the RCDSO guidance for Ontario dental offices is the most explicit daily monitoring rule in the country. Other provinces set their own cadence, so confirm your own regulator wording.
ST79 stays useful for load configuration, dry time, packaging integrity and cycle parameters — but it is not the source of your monitoring frequency.
How Should a Canadian Clinic Use ST79 Without Over-Complying?
Treat ST79 as a technical reference and CSA Z314 plus your college as the compliance layer: an external and an internal chemical indicator in every pack, a biological indicator on the Ontario daily cadence, lot number and expiry recorded for each indicator, and a log retrievable at inspection.
If daily monitoring is new for your office, the consumable rhythm is the part that bites. The BI 5-pack trial at $12.99 tests a 24-hour workflow before a standing order, and the 24-hour self-contained BI, 25-pack suits a single-sterilizer office. Larger sites can plan volumes at the bulk quote desk, and the sterilization compliance hub holds the templates.
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 For a printable version, use the free sterilization compliance log sheet (free tool).
For the clause-by-clause version, read AAMI ST79 vs CSA Z314 compared line by line. Two companion pieces cover the operational side: how Ontario's daily biological indicator rule works in practice and what each standard asks for after a major sterilizer repair.
Frequently Asked Questions
Is AAMI 1135 the same document as AAMI ST79?
No. AAMI 1135 is the older numbering that ST79 replaced in 2006. A sheet dated 2014 usually reflects an amendment-era printing.
Does AAMI ST79 apply to Canadian clinics?
It applies as a technical reference, not as a regulation. Canadian reprocessing practice is built on the CSA Z314 series, and provincial colleges such as the RCDSO set the monitoring expectations their members face.
How often does the RCDSO require a biological indicator test?
In Ontario dental offices, the RCDSO expects a biological indicator test every day the sterilizer is used: a daily expectation, not the lower baseline used in United States guidance.
What should a Canadian clinic take from AAMI ST79?
The packaging, loading, dry-time and cycle-parameter detail, plus the habit of an internal and an external chemical indicator in every pack. Leave monitoring frequency to CSA Z314 and your college.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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