The sterilization processes are controlled through a combination of physical, chemical, and biological techniques designed to evaluate the sterilization conditions and the efficiency of the process. The physical techniques include cycle time control and pressure and temperature indicators control inserted at the equipment’s control board. A correct reading does not ensure a correct operation of the cycle, but an incorrect reading could be the first evidence of the existence of a problem.
The chemical techniques use sensitive substances to one or more sterilization cycle parameters. Usually, they indicate the achieved parameters value through a color change. There are chemical indicators that sense one parameter and others that respond to multiple sterilization cycle parameters.
The biological techniques contain the most resistant microorganisms. A biological indicator is broadly defined as a characterized preparation of a specific microorganism that provides a defined and stable resistance to a specific sterilization process.
Reference:
World Health Organization: WHO
Please Check out file at the following link
Biological Indicator Incubator (RRS 14-3210)
Dry Heat Chemical Indicator class 6 (RRS 14-15610)
The main factor that influences the efficiency of a sterilization process
