Advancing the Sustainable Use of Ethylene Oxide through Process Validation

Area of Science:

• Medical Device Sterilization
• Microbiology
• Process Engineering

Background:

• Ethylene oxide (EO) sterilization is a globally dominant method for single-use medical devices, accounting for about 50% of the market.
• Current validation methods, like AAMI/ANSI/ISO 11135:2014, often employ an "overkill" approach, ensuring a sterility assurance level (SAL) of 10-6 with significant safety margins.
• Increasing focus on epidemiological considerations and resource management necessitates optimizing EO processes to use only the required amounts of sterilant.

Purpose of the Study:

• To present experiences and insights into the challenges and considerations of optimizing ethylene oxide (EO) sterilization processes.
• To demonstrate how EO sterilization can be effectively optimized for the reliable delivery of single-use medical devices.
• To support the industry's efforts in reducing sterilant usage while maintaining stringent sterilization standards.

Main Methods:

• Review of industry practices and case studies in EO process optimization.
• Analysis of strategies aimed at reducing sterilant consumption in routine EO sterilization cycles.
• Evaluation of validation approaches that move beyond traditional "overkill" methods to achieve the required SAL of 10-6.

Main Results:

• Optimization strategies are being successfully implemented across the medical device industry.
• Encouraging results have been observed in reducing sterilant usage while maintaining the target SAL.
• The experiences highlight practical challenges and effective considerations for successful EO process optimization.

Conclusions:

• Ethylene oxide (EO) sterilization processes can be optimized to reduce sterilant usage effectively.
• Optimized EO sterilization ensures the delivery of safe and sterile single-use medical devices.
• Further adoption of these optimization strategies can lead to more sustainable and efficient medical device sterilization practices.