CliniEco Medical

No — and the two words sit in different documents with different obligations.

Sterile describes a state: an item that is free of viable microorganisms. It is produced by a validated process and preserved by its packaging until the moment of use.

Aseptic describes a technique: the practices that keep contamination away from the patient — and from the instruments once their packaging is opened. Aseptic technique is a behaviour, carried out by people.

Practical consequence: you cannot make an item sterile by handling it carefully, and you cannot keep it sterile without aseptic technique. Sterility is a process result; asepsis is what protects that result after the pack is opened.

Sources: ISO 11737-1:2018 (Introduction) for "sterile"; RCDSO Infection Prevention and Control in the Dental Office, v3 (Glossary) for "asepsis" and "aseptic technique".

It depends on your jurisdiction, not on your product. In Ontario, a biological indicator is required for each sterilizer on every day that sterilizer is used, and for each type of cycle used that day.

The "weekly" cadence that circulates in most clinic templates is the U.S. CDC / AAMI ST79 baseline — it is not the Ontario requirement. British Columbia's published requirement, by contrast, is weekly. A schedule copied from a U.S. checklist will not match the record an Ontario inspector asks to see.

If your sterilizer runs Monday, Wednesday and Friday, you run an indicator on those three days and record three results — days the practice is open are not the same as days the sterilizer runs.

Sources: RCDSO IPAC Standard v3, p.24; Public Health Ontario PIDAC guidance, p.41. Requirements are set province by province — read the current text from your own regulator.

A biological indicator (BI) is a small test carrier holding a known population of Geobacillus stearothermophilus spores. It is processed through your sterilization cycle, then incubated — and it answers the one question a chemical indicator cannot: were the spores actually killed?

A chemical indicator (Class 1–6) tells you the load reached sterilizing conditions. A biological indicator tells you the kill actually happened. They measure different things and are not interchangeable — which is why a passing chemical indicator does not let you skip the biological one.

The result is only useful if it is recorded: lot number, expiry date, cycle type, sterilizer identifier, time read, and operator initials all belong in the log.

Chemical indicators are a per-pack and per-load check, not something you schedule on a calendar:

• a Class 1 external indicator (process indicator tape, or the indicator printed on the pouch) on every pack, read after the cycle
• an integrator (Class 4/5/6) inside the pack wherever steam penetration has to be demonstrated
• a Bowie-Dick test at the start of day for vacuum autoclaves

A failed external indicator on a pack means that pack does not go out. But none of this replaces the biological indicator: frequent chemical checks are not a substitute for spore testing on the schedule your province requires.

Sources: CDC Guideline for Disinfection and Sterilization in Healthcare Facilities (2008, updated June 2024), p.74; ANSI/AAMI ST79 §13.5.3; CSA Z314.3.

Packaging does two jobs at once: it must let the sterilant reach the instruments during the cycle, and then keep microorganisms out until the pack is opened. Everything below follows from that.

• Use packaging validated for the cycle you run — for steam, Class 4 dual-indicator pouches change colour only when steam has penetrated under the right conditions.
• Allow the pack to dry before handling; a damp pack has lost its barrier.
• Check the full seam seal, not just the top edge. A compromised seal is a reprocessing job, not a supply item.
• Put an indicator where it can be read without opening the pack — an inspector checks that first.
• Store packs so they are not punctured, compressed or exposed to moisture, and record the load.

At the point of use, package integrity is what preserves the sterile state: check the date, and inspect for punctures or damp before the pack is opened.