| Summary: | SUMMARIES. The basic device in the system is a positive pressure steriliser and first, after items are placed in it, the system creates negative pressure (30 kPa), and then steam is introduced. Thus growth of fungi is induced which increases their sensitivity to ethylene oxide and is a condition of their further destruction. Moisturization lasts for several minutes followed by introduction of ethoxene (rothanox) into the chamber, creation of positive pressure and increase of temperature. The most efficient of the programmes which enable the implementation of the process and at the same time most conservative with respect to the material takes place at the temperature of 30°C and when the pressure reaches 220 kPa. Relative air humidity in the principal phase of disinfection which lasts about 3 hours is 30% and the ethylene oxide concentration is 430 g/m3. After the disinfection is completed, gas is evacuated from the chamber and the ethylene oxide contained in it is utilized through catalytic combustion. The collections in the steriliser are aired which consists in repeated cycles of filling the chamber with air and its suction through the utilization device. Upon completion of the whole process which lasts in total about 24 hours, the disinfected items are directed to a separate chamber where their airing is continued. Around the disinfection chamber are sensors which ensure permanent measurement of ethylene oxide combustion, and the measured values are displayed on the monitor. When they exceed the permitted level, the system sets the alarm on and stops the process.
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