Cleaning Process Indicators with Hollow-Flow-PCD and Holder 235-800-000-1Tr_TemizlemeInd(700-021 EN V22).pdf

The gke Clean-Record® cleaning process moni-toring indicators are used for routine monitoring of cleaning processes in washer disinfectors (WD). To test hollow instruments, a special hollow flow process challenge device (PCD) can be connect-ed to the hose connection of minimal invasive surgical (MIS) instruments and endoscope carts. In large machines the indicators can also be used and can be adhered directly on metal surfaces.
Surgical instruments are contaminated with vari-ous soils. Depending on the pre-treatment of instruments the adhesion may be different. Body fluids consist 75-85% of water soluble proteins and can be washed off with cold water.
Many disinfectants have the characteristics that they fix soils and then the instruments are more difficult to clean. Instruments should be cleaned with cold water directly after use before the soils can adhere and before disinfectants are used which are fixing soils.
The use of cleaning detergents is very important for the efficacy of cleaning processes if non-water soluble soils are contaminants. Only water soluble soils can be washed off with water. Fats and other non- water-soluble soils, e.g. lipids or hard baked proteins can only be washed off, if a cleaning detergent is used. Some cleaning detergents are alkaline and hydrolize the non-water-soluble substances by using a high pH-value making them water-soluble. Other cleaning agents have a neutral pH-value contain-ing enzymes which break up soils and make them water-soluble. Both mechanisms can be combined in one cleaning detergent.
Which cleaning detergent suits best, depends on the instruments (e.g. construction, material) and the type of contamination (e.g. fresh blood, dried blood, bone meal, mucus). In addition, the water quality (hardness and salinity) highly influences the effectiveness of cleaning detergents.
Firstly, validation of the specified cleaning process must be performed to ensure instrument cleaning under the worst-case conditions without using gke CPI. For routine monitoring, the CPI is used, which has just been washed-off in the validated process.

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