During the sterilization process it is absolutely necessary to monitor the relative humidity in addition, which should be above 30%. The ideal relative humidity during sterilization is between 60% and 70% RH.
gke offers a Compact-PCD®-Testset where PCDs with different penetration characteristics can be selected. Initially all PCDs can be used and checked which are penetrated and which are not and the most difficult one can be selected which is still able to pass. The validation of this process should be checked also with biological indicators.
Alternatively 6 different Bio-C-PCDs can be selected by using self-contained biological indicators SCBIs for ethylene oxide sterilization processes, see separate data sheet.
Sterilization processes which are carried out with ethylene oxide, the PCD should only be used if sufficient diffusion time for the penetration is guaranteed. Is there no penetration of the ethylene oxide gas in the PCD, put the indicators (depending on the packaging-material) of the other sterilizing goods in one or more tyvek pouches to assure difficult sterilizing conditions. In this case sterilizing of longer hollow-types cannot be detected.