Technical Specifications And Application Guide For Ethylene Oxide Sterilizer
Equipment Overview
Ethylene oxide sterilizer is a professional low-temperature sterilization equipment that uses pure ethylene oxide gas as the sterilization medium. It is widely used in medical and health institutions, pharmaceutical companies and medical device manufacturers. The equipment achieves effective sterilization of heat-sensitive items through a special chemical action mechanism, while ensuring that the physical and chemical properties of the sterilized items are not affected. As an important representative of modern sterilization technology, its excellent material compatibility and reliable sterilization effect make it the preferred solution for sterilization of precision medical devices.
Working Principle
Sterilization Mechanism
Ethylene oxide gas acts on microbial proteins and nucleic acids and other life macromolecules through alkylation reactions. This chemical reaction can irreversibly destroy the cell structure of microorganisms, thereby achieving a thorough sterilization effect. Its mechanism of action has the following characteristics:
It can effectively kill all microorganisms including bacterial propagules, spores, viruses and fungi
The chemical reaction process is mild and will not corrode the sterilized items
The gas molecules have extremely strong penetrating ability and can reach the complex structure of the instrument and the inside of the packaging
Sterilization cycle
The complete sterilization process includes three stages:
(1) Pretreatment stage: Create a suitable environment for sterilization through vacuum and humidification
(2) Sterilization stage: Sterilization is carried out under strictly controlled environmental parameters
(3) Analysis stage: Remove residual gas on the surface and inside of the item through forced ventilation
Scope of application
Applicable objects
Precision medical devices: such as minimally invasive surgical instruments, endoscope components, catheters, etc.
Electronic medical equipment Equipment: including various sensors, monitoring probes, etc.
Polymer material products: disposable medical supplies, silicone products, etc.
Special material items: optical lenses, paper recording materials, etc.
Prohibited scope
Liquids, oils and powdered substances
Packaging items with insufficient sealing
Technical features
Safety assurance system
Fully enclosed negative pressure operation design to effectively prevent gas leakage
Multiple access control interlocking devices to ensure the safety of the operation process
Intelligent gas concentration monitoring and alarm system
Automatic exhaust gas treatment device to ensure emission safety
Intelligent control system
Human-machine interactive touch interface, visual operation process
Automatic recording and storage function of sterilization parameters
Fault self-diagnosis and abnormal situation warning system
Procedure Automatic recovery function after interruption
Structural design features
Modular chamber design for easy maintenance and cleaning
Electric lifting door mechanism for easy loading of items
Reasonable gas circulation system to ensure uniform sterilization
Quality control system
Process validation requirements
Before the equipment is put into use, a complete performance validation is required, including:
No-load heat distribution test
Full-load heat penetration test
Microbial challenge test
Residual detection verification
Daily monitoring specifications
(1) Physical monitoring
The following parameters must be recorded and saved for each batch of sterilization:
Sterilization temperature fluctuation range
Environmental relative humidity changes
Gas action time
Pressure change curve
(2) Chemical monitoring
A chemical indicator card should be placed on each package of sterilized items to determine whether the sterilization conditions are Whether it meets the standard
(3) Biological monitoring
Carry out biological monitoring at least once a week, use standard bacterial slices to verify the actual sterilization effect, and the monitoring results should be archived for reference
Precautions
Loading requirements
Items should be placed with appropriate gaps
Items of different materials should be handled separately
Packaging materials must have good air permeability
Safety protection
Operators should receive professional training
The work area must be well ventilated
Regularly check the sealing performance of the equipment
Equip with necessary personal protective equipment
Maintenance and maintenance
Regularly replace gas filters
Clean the sterilization chamber in time
Regularly calibrate sensors
Keep equipment operation records
Development trend
With the advancement of medical technology, ethylene oxide sterilization technology is moving towards a safer and more environmentally friendly direction. The new generation of equipment continues to improve in the following aspects:
Optimize waste gas treatment technology to reduce environmental impact
Develop smarter control systems to improve operational convenience
Shorten sterilization cycle and improve work efficiency
Improve remote monitoring functions to achieve traceability of the sterilization process
This specification aims to provide technical guidance for the safe use of ethylene oxide sterilizers. Each user unit should formulate corresponding operating procedures based on the specific equipment model and actual working conditions. The correct use and maintenance of sterilization equipment is of great significance to ensure medical safety and improve sterilization quality.
