AAMI 11135 is the ethylene oxide sterilization standard, and AAMI level 3 is a barrier rating for gowns — two unrelated documents that happen to share a name. ANSI/AAMI/ISO 11135:2014 sets out how a facility develops, validates and routinely controls an ethylene oxide process for medical devices. ANSI/AAMI PB70, where the numbered gown levels live, answers a different question: how much fluid pressure a protective garment resists.
What does AAMI 11135:2014 cover?
The standard follows the whole ethylene oxide lifecycle rather than a single test. It opens with the process definition — gas concentration, humidity, temperature, pressure and exposure time — then moves through installation and operational qualification, performance qualification, and the routine monitoring that keeps a validated cycle in control. Product release, revalidation triggers and the records behind them sit inside the scope too.
What it does not cover is people. Nothing in 11135 tells a reprocessing technician which gown, mask or glove to wear. That question belongs to the barrier-performance family, and it lives somewhere else entirely.
Is AAMI 11135 the same as ISO 11135?
Functionally, yes. ANSI/AAMI/ISO 11135:2014 is the North American adoption of the international standard ISO 11135:2014, so a clinic reading one and a laboratory reading the other are working from the same technical text. The 2014 edition replaced the 2007 and 1994 versions, which is why older quality manuals still quote numbers that have moved on.
What is AAMI level 3, then?
AAMI level 3 is one of four barrier levels defined in ANSI/AAMI PB70 for protective apparel. Level 1 is the lightest, level 4 the heaviest, and level 3 sits in the middle — built for moderate fluid contact rather than heavy spray. The levels rest on water-impact resistance and hydrostatic pressure testing of the fabric and the seams, not on anything connected to a sterilizer.
This is where buyers get sent down the wrong path. A product page saying "AAMI level 3" describes a garment. A quality procedure citing "AAMI 11135" describes a sterilization process. Search the two terms together and you get results that blend them.
Which document applies to which purchase?
| Document | What it governs | Buyer question it answers |
|---|---|---|
| ANSI/AAMI/ISO 11135 | Ethylene oxide sterilization — development, validation, routine control | How do we validate and monitor an EO cycle? |
| ISO 11135 | International edition of the same standard | The same content, cited outside North America |
| ANSI/AAMI PB70 | Liquid barrier performance and classification of protective apparel | Which gown level suits this procedure? |
| PB70 level 3 | Moderate barrier level inside PB70 | Is this gown enough for splash-heavy work? |
How does this play out in a Canadian clinic?
Most Canadian clinics run steam autoclaves, so 11135 only surfaces when heat-sensitive items leave the building for ethylene oxide processing. That is the moment the validation paperwork becomes the clinic's problem, usually because a contract sterilizer wants load records before it will accept a tray. Gown levels arrive far more often, since isolation gowns are reordered every month and the level is printed on the box.
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
sterilization compliance hub; Spaulding classification for Canadian clinics; sterilization load types in Canada; Level 2 SMMS isolation gowns, 50-pack.
Frequently Asked Questions
Is AAMI 11135 the same as AAMI level 3?
No. AAMI 11135 covers ethylene oxide sterilization processes, while AAMI level 3 is a gown barrier rating defined in ANSI/AAMI PB70. They share part of a name and nothing else.
Does AAMI 11135 apply to steam autoclaves?
No. Steam sterilization sits under a different standard family. 11135 is specific to ethylene oxide cycles, so a steam autoclave is not validated against it.
What replaced AAMI 11135:2007?
The 2014 edition, adopted as ANSI/AAMI/ISO 11135:2014. Manuals that still cite the 2007 version are working from a superseded document.
Do Canadian clinics need their own copy of 11135?
Only if they run or contract ethylene oxide sterilization. Clinics that send instruments out usually just supply load records when the contract sterilizer asks for them.
Which gown level should a clinic stock?
It depends on the fluid exposure of the task. Level 2 suits routine care and level 3 covers more splash, so many clinics stock both for different procedures.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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