Views: 5 Author: Site Editor Publish Time: 2021-10-26 Origin: Site
①Ethylene oxide sterilization procedures need to include preheating, pre-wetting, vacuuming, injecting vaporized ethylene oxide to reach a predetermined concentration, maintaining the sterilization time, clearing the ethylene oxide gas in the sterilizer, and analyzing to remove Residues of ethylene oxide in sterilized items.
②100% pure ethylene oxide or mixed gas of ethylene oxide and carbon dioxide can be used for ethylene oxide sterilization. The use of Freon is prohibited.
③Analysis can be continued in an ethylene oxide sterilization cabinet, or it can be placed in a special fume hood, and natural ventilation should not be used. The repeatedly input air should be filtered with high efficiency, which can filter out more than 99.6% of particles ≥0.3um.
④Ethylene oxide residue mainly refers to the ethylene oxide remaining in articles and packaging materials after ethylene oxide sterilization and its two by-products, chloroethanol ethane and ethylene glycol ethane; exposure to excessive ethylene oxide Alkane residues can cause burns and irritation to patients. The amount of ethylene oxide residue is related to the materials of the sterilized articles, the parameters of the sterilization, the packaging materials and the size of the packaging, the loading capacity, and the analysis parameters. When the polyvinyl chloride catheter is at 60℃, it is analyzed for 8h; when it is 50℃, it is analyzed for 12h. Some materials can shorten the resolution time, such as metal and glass can be used immediately, and some materials need to extend the resolution time, such as a built-in pacemaker.
⑤Ethylene oxide emission:
Atmosphere is the first choice for ethylene oxide emission in hospitals. Installation requirements: There must be a special exhaust piping system, and the exhaust pipe material must be ethylene oxide and not permeable such as copper pipes. There should be no flammable materials and building air inlets such as doors or windows within 7.6m from the exhaust; if the length of the vertical part of the exhaust pipe exceeds 3m, a water collector must be installed, and the exhaust pipe should not be dented Or the loop will cause water vapor to accumulate or freeze in winter, blocking the pipe; the exhaust pipe should be led to the outdoors and reversed at the exit to prevent water vapor from staying on the pipe wall or causing the pipe wall to be blocked; a professional must be requested Installation engineer, and install it in accordance with the requirements of the ethylene oxide sterilizer manufacturer. If ethylene oxide is discharged into the water, the entire discharge system (pipes, tanks, etc.) must be sealed, otherwise a large amount of hot ethylene oxide will overflow from the water and pollute the surrounding working environment.