Ensuring medical devices are free of any kind of microbiological contamination requires microscopic attention to detect any possible sources of contamination, including those from the environment and personnel themselves.

The factors and requirements are many, depending on where the medical devices are used and how they are cleaned prior to sterilization. A new technical specification provides the first set of internationally agreed requirements for sterilizers to ensure all bases are covered.

ISO/TS 22421 Sterilization of health care products Common requirements for sterilizers for terminal sterilization of medical devices in health care facilities provides high-level, overarching requirements and respective test methods, and sets the scene for further, more detailed standards to be developed.