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Sterilizing units designed for total inactivation of microorganisms that are or may be present on medical devices using ethylene oxide gas with low humidity content. These units usually include a treatment chamber with shelves on which the devices to be sterilized are placed, usually after being cleaned of gross debris and packed in gas-permeable wraps; means to introduce the gas into the chamber; and controls to choose one of the sterilization cycles. Some units also include an integral purging system to eliminate the vapor residues, which is activated after the sterilization cycle is complete. Ethylene oxide gas sterilizing units are available in a variety of shapes and sizes including both stand-alone and tabletop units. The units are used to sterilize devices and supplies that are sensitive to high temperature and humidity, such as those including plastic and rubber components.
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