22 Especially with plastics, the risk of material damage, accelerated aging, or water retention due to treatment with chemicals is known and must be thoroughly considered when selecting materials. The use of metal/plastic composites also warrants special consideration here. Therefore, when it comes to innovative plastics, coatings, or even housings in the medical sector, it is often necessary to clarify whether they are generally suitable for regular treatment with disinfectants. Determining disinfectant performance There are a variety of different disinfectants that can be used on medical instruments and devices. Some of them are suitable mainly for surface disinfection, while others are better designed for immersion disinfection or even spray disinfection. However, not every disinfectant is suitable for every device, material, or intended purpose. Due to increased surface roughness or inadequate exposure time, it is possible that disinfectants will not attain their promised performance. As a result, pathogens could remain on the device and be transmitted to patients or staff. ENGLISH Disinfectant performance of various medical devices. The disinfection of the device is considered successful if levels of bacteria are reduced by 5 log levels (red dot). Left: Bacterial concentration in CFU/ml after inoculation of the medical device. Right: Bacterial concentration in CFU/ml after disinfection of the medical device according to the manufacturer’s instructions. Disinfection performance after disinfection inoculation with bacteria bacterial concentration in CFU/ml medical device 1 medical device 2 medical device 3 medical device 4 medical device 5 medical device 6
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