Overview
ISO 15883-2:2006 is the international standard that specifies requirements and tests for washer‑disinfectors (WD) that use thermal disinfection to clean and disinfect reusable medical devices in a single cycle. It covers devices such as surgical instruments, anaesthetic and respiratory equipment, bowls, dishes, receivers, utensils and glassware. ISO 15883-2 is intended to be used together with the general requirements in ISO 15883-1.
Key topics and technical requirements
- Scope of application: Cleaning and thermal disinfection (hot water, steam or combination) of reusable medical devices and instruments.
- Performance metric - A0 value: Thermal disinfection efficacy is expressed as an A0 value (equivalent time in seconds at 80 °C for a microorganism with z = 10 K).
- Minimum A0 required: ≥ 600 on all surfaces of the load and chamber (when tested per thermometric procedures).
- Adjustable range: disinfection settings must allow A0 values up to at least 3 000.
- Cleaning verification: Cleaning performance is tested per ISO 15883-1 and ISO/TS 15883-5 using standardized test soils and methods relevant to the loads.
- Temperature control:
- Washing temperature band lower limit = washing temperature; upper limit = washing temperature + 10 °C.
- Temperature differences across load, chamber walls and load carrier must not exceed 5 K during washing.
- Mechanical and control features: Connectors and load carriers for lumen and powered devices to ensure adequate fluid flow; process chemical dosing accuracy ±5% or better and adjustable only by key/code/tool.
- Testing and conformity: Includes thermometric tests, soil‑removal tests and conformity procedures defined in the standard (see clauses 6.2–6.3).
- Limitations: The specified performance may not ensure inactivation/removal of prion proteins (transmissible spongiform encephalopathies).
Practical applications and users
Who uses ISO 15883-2:
- Medical device manufacturers designing instruments compatible with WD cycles.
- WD manufacturers (design, testing, and certification).
- Hospitals, central sterile services departments (CSSD) and clinics specifying purchase and validation criteria.
- Biomedical engineers, infection control teams and procurement professionals** assessing WD performance and compliance.
- Test laboratories and regulatory bodies conducting conformity assessment and safety verification.
Practical benefits:
- Ensures validated cleaning + thermal disinfection cycles for reusable devices.
- Specifies measurable acceptance criteria (A0, temperature uniformity, cleaning efficacy).
- Supports safe reprocessing workflows and procurement specifications for clinical sterilization equipment.
Related standards
- ISO 15883-1 - General requirements, terms and tests (mandatory companion).
- ISO/TS 15883-5 - Test soils and cleaning efficacy methods.
- Other parts of ISO 15883 (e.g., Part 3, Part 4) for additional applications and chemical disinfection.
- IEC 61010‑2‑045 - Safety requirements for washer‑disinfectors.
Keywords: ISO 15883-2, washer-disinfectors, thermal disinfection, A0 value, cleaning efficacy, surgical instruments, lumen devices, CSSD, infection control.