Large Animal Practice Sterilization: What Changes on a Farm-Call Workflow
A practice that runs farm calls works out of two places at once. The base unit stores equipment, supplies and records; the barn, crush or paddock is where surgery happens. Ontario's facility standards follow that split, with a section written for the base unit of a mobile practice and a separate standard for large animal ambulatory surgery.
What does a farm call change about sterilization?
The method does not change; the sequence does. A recognized method of sterilization must be employed, the system has to be effective in the sterilization of instruments and equipment, and a steam sterilizer large enough for the surgical packs of the expected case load has to be present. A barn has no autoclave, so packs are processed, packaged and labelled at the base unit before the truck leaves. The ambulatory standard asks for aseptic technique as appropriate and practical for the procedure and conditions.
Is cold sterile acceptable for field surgery?
Only for the items the standards name. Cold sterilization is listed for material and instruments that cannot be steam sterilized, such as instruments with lenses (endoscopes and arthroscopes) and anesthetic equipment. The standard is unambiguous the other way: cold sterile is not an acceptable sterilization method for surgical instruments to be used for major surgery.
| Method | What the standards allow | Where it runs out |
|---|---|---|
| Steam (autoclave) | Most common method in veterinary medicine; a steam sterilizer sized for the case load must be present | Needs a labelled pack and a completed cycle before departure |
| Cold chemical | Items that cannot be steam sterilized, such as instruments with lenses and anesthetic equipment | Not acceptable for instruments used in major surgery |
| Gas (ethylene oxide) | Delicate equipment that heat or steam would damage | Not a substitute for the steam sterilizer |
| Pressure cooker | Not permitted for the purposes of sterilization | — |
What has to travel in the truck for a farm call?
The ambulatory surgery standard asks for:
- Separate sterilized surgical packs for each major surgical procedure.
- Sterile single-use surgical gloves for all surgeries, plus sterile instruments, towels and drapes for each procedure.
- Hand and arm scrub supplies including a surgical scrub agent; a recognized brushless system is acceptable.
- Footwear that can be easily disinfected or disposable footwear, and washable or disposable coveralls, cleaned immediately after use.
- Contained waste: a 30-gallon red biohazard bag and heavy-duty nitrile gloves carried for the visit rather than borrowed from the clinic bin.
Which records does a mobile practice keep on a sterilized pack?
Every item sterilized in the facility must display the date of sterilization and the name or initials of the team member who carried out the sterilization, and surgical packs are initialled and dated by the person who processed them. Autoclave efficiency must be routinely monitored using standard sterilization indicators, because pressure and temperature gauges may be inaccurate. For a mobile practice the workable version is one line per cycle in a log that travels with the kit. The sterilization roll and Class 4 dual-indicator pouches you package with are part of that trail: the indicator on the packaging is the outward half of the record.
How is farm-call waste classified in Ontario?
Saturation decides the stream, not the location. Under C-4, animal blood waste means waste related to an animal treated for an infectious substance that is liquid or semi-liquid blood, items saturated with it, or body fluids visibly containing animal blood; urine, faeces and milk are excluded unless visibly bloody. Containers must be capable of withstanding the weight of the waste without tearing, cracking or crushing.
| Waste from the visit | Container | Label |
|---|---|---|
| Animal blood waste — saturated drapes, pads, sponges | Single use or reusable container | Yellow, universal biohazard symbol |
| Animal anatomical waste — tissue, carcass | Single use container | Red, anatomical symbol |
| Sharps waste | Rigid sharps container | Yellow, universal biohazard symbol |
For a practice that splits its week between the clinic and the road, the veterinary practice supply hub groups the consumables this workflow consumes, and sterilization monitoring supplies covers indicators and spore tests.
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.
References
- College of Veterinarians of Ontario — Accreditation Standards for Veterinary Facilities in Ontario (checked 21 September 2026)
- College of Veterinarians of Ontario — Accreditation of veterinary facilities (checked 21 September 2026)
- Ontario Ministry of the Environment, Conservation and Parks — C-4: The management of biomedical waste in Ontario (checked 21 September 2026)
Not sure which monitoring consumable fits your cycles? Start with the BI 5-pack trial (CA $12.99, shipping included), or request a quote for volume pricing.
Related Reading
- Large Animal Veterinary Supplies: Gloves and Waste for Farm Calls
- Case Review: Rebuilding Autoclave Load Records Before a College Practice Visit
- Veterinary Sterilization Monitoring: Spore Testing in Canadian Animal Hospitals
- printable autoclave sterilization log sheet (free)
- printable sterilization log
Frequently Asked Questions
Can I use a pressure cooker to sterilize instruments for a farm call?
No. The ambulatory large animal surgery standard states that the use of a pressure cooker for the purposes of sterilization is not permitted, and asks instead for a steam sterilizer sized for the expected case load.
Is cold sterile acceptable for field surgery?
Only for the items the standards list for it, such as instruments with lenses and anesthetic equipment. Cold sterile is not an acceptable sterilization method for surgical instruments to be used for major surgery.
Does a mobile practice need its own autoclave?
The steam sterilizer has to handle the surgical packs for the expected case load, and a gas sterilizer is not a substitute for it. In practice it sits in the base unit where packs are processed and labelled.
How is waste from a farm call classified in Ontario?
Saturation decides the stream. Animal blood waste is liquid or semi-liquid blood, items saturated with it, or body fluids visibly containing animal blood; urine, faeces and milk are excluded unless visibly bloody.
Last updated: September 2026. CliniEco Medical is a licensed medical device establishment (MDEL #35334).
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