It is the process by which all microorganisms are eliminated, Such as fungi, bacteria and viruses, including spores Microbial material to be sterilized.
Sterilization can be used in many different fields Industry and medical and surgical fields that are of the most important Areas that require sterilization, such as gloves and surgical instruments Which is used in direct contact with blood stream and tissues Sterile body.
Basics of sterilization 1 - A thorough cleaning of the medical equipment, which removes any remaining organic materials on the desired instruments Its sterilizers can protect microorganisms during the sterilization process. . If the elements Not clean and clear, exposure time is not enough to sterilize the tools.
2 - Sterilizers must be in contact with all surfaces to be sterilized. This means that Tools should be dismantled according to manufacturers' instructions so that all surfaces are exposed to Sterilizers. Other variables that affect sterilization include the following: Dry equipment to be sterilized Temperature and humidity in the treated area Tools are properly prepared and loaded into the sterilizer Sterile condition Use the correct sterilization method and cycle
Thermal sterilization methods Sterilization by saturated steam with high pressure using Steam sterilization and high pressure are an effective method of sterilization and is the preferred method To sterilize the tools and materials used in health care facilities. When it is sterilized Tools and equipment By high pressure steam sterilization, it is essential that Steam reaches all surfaces.
Steam sterilization is an effective sterilizer for two reasons: First, saturated steam is an effective convector of thermal energy. It is many times more effective in transporting this species Energy from hot dry air
Second, steam is an effective sterilizer for the protective outer layer of microorganisms It is weakened by steam, which allows clotting of sensitive internal parts of the organisms Delicate live
Steam sterilization conditions Adequate contact, sufficiently high temperature, correct time and moisture Enough. In order to destroy all microbes, the vapor must be able to come into contact with all Surfaces. Steam can only sterilize the surfaces it touches.
Standard conditions for steam sterilization The temperature should be 121 ° C (250 ° F), and it should The pressure is 106 kPa (in2 / 15lbs) for a period of 20 minutes for tools or other materials Coated and 30 minutes coated in sterilizer displacement gravity. Or at a temperature above 132 ° C (270 ° F) In a previlizer sterilizer, the pressure should be in2 / 30lbs and for 15 minutes Table 1). Allow all tools to dry before removing them from the sterilizer
Advantages of steam sterilization 1. Most commonly, it is an effective method of sterilization. 2. The sterilization cycle time is shorter than dry heat or Chemical sterilizers.
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10.04.2020 16:01
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