Explosion-proof ethylene oxide sterilization pretreatment process

Abstract

The invention discloses an explosion-proof ethylene oxide sterilization pretreatment process. The process comprises the steps that firstly, a product to be sterilized is preheated in a preheating chamber and transferred into a sterilization cabinet after preheating is ended; secondly, the sterilization cabinet is sequentially subjected to heating, vacuumizing, nitrogen displacement, humidifying, moisturizing, medicating and nitrogen filling; and finally, the product to the sterilized is kept sterilized for a certain period of time in the sterilization cabinet. According to the process, two steps of the nitrogen displacement and the nitrogen filling are added compared with an existing ethylene oxide sterilization pretreatment process; residual oxygen after vacuuming the sterilization cabinet is replaced by nitrogen, so that ethylene oxide gas out of an explosion limit is ensured, and occurrence of explosion is avoided; meanwhile, the vacuuming time and sterilization time are shortened,so that the sterilization efficiency is improved; in addition, nitrogen filling is carried out after medicating to enable the ethylene oxide to penetrate into the product better, so that the sterilization effect and the sterilization efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of sterilization of medical instruments, in particular to an explosion-proof ethylene oxide sterilization pretreatment process. Background technique [0002] Ethylene oxide (EO), also known as ethylene oxide, has the advantages of strong penetrating power, wide sterilization spectrum, no damage to articles, and reliable sterilization effect, so it is widely used in the sterilization of medical devices and articles. However, since ethylene oxide is a flammable, explosive and toxic gas, it is easy to volatilize at room temperature, and can cause an explosion when the concentration is too high. The ethylene oxide sterilization technology used in the existing medical device sterilization is based on the sterilization process directed by the sterilizer manufacturer, and the explosion-proof measures for the pre-sterilization treatment are mainly through vacuuming the sterilizer before adding EO However, this meth...

AI Technical Summary

Problems solved by technology

However, since ethylene oxide is a flammable, explosive and toxic gas, it is easy to volatilize at room temperature, and can cause an explosion when the concentration is too high

The ethylene oxide sterilization technology used in the existing medical device sterilization is based on the sterilization process directed by the sterilizer manufacturer, and the explosion-proof measures for the pre-sterilization treatment are mainly through vacuuming the sterilizer before adding EO However, this method has high requirements for vacuuming, and there will be problems such as long sterilization time and low sterilization efficiency due to long vacuuming time, and there will also be a certain amount of oxygen in the cabinet after vacuuming. Problems, resulting in the concentration of EO gas in the cabinet may reach the explosion range and there is a safety hazard of explosion