*Materials sterilized with EO are not exposed to excessive heat, moisture, or radiation. Therefore, a wide variation of materials, particularly polymeric components commonly used in medical devices, can be sterilized with EO. Material compatibility is described in AAMI TIR 17 (compatibility of materials subject to sterilization).

*Products can be sterilized in their final packaging, since EO will permeate the sealed films and cartons used to package the device.

Standards:

*ISO 11135, Sterilization of health care products – Ethylene oxide – Requirements for development, validation, and routine control of a sterilization process for medical devices.

This international standard outlines the requirement for the validation of an EO process to ensure that product processed through the validated process meets the required SAL.

*ISO 10993-7: Biological evaluation of medical devices — Part 7: Ethylene oxide sterilization residuals

Trace levels of EO and ethylene chlorohydrin (ECH) may remain on products after an EO sterilization process. ISO10993-7 outlines the specific limits of EO and ECH that must not be exceeded in order to ensure product and patient safety. Data on meeting these limits is established during the validation of the EO process.

Ethylene Oxide Support Services:

In addition to ethylene oxide sterilization, STERIS AST provides our Customers with laboratory testing and technical support at every stage of the sterilization design process, from cycle development through routine processing.

TechTeam® Technical Experts

Our EO TechTeam guides Customers through the sterilization validation process, provides solutions for unique project needs, and supports Customers through their regulatory audits as needed.

The EO TechTeam provides technical support for all matters relating to ethylene oxide, including (but not limited to): Technical consultation, process development/optimization, sterilization validation, technical resources, and general research and development.

Testing and Validation Services

Our laboratory testing and product and packaging testing services provide Customers with validation support and microbial testing, ensuring medical devices processed with EO perform as expected for the life of the product, and packaging maintains the sterility of the device until its point of use.

Sustainable EO® Sterilization Services

As part of our commitment to providing innovative and sustainable solutions, STERIS AST has developed the Sustainable EO sterilization services program. Our Sustainable EO services provide Customers with strategies to reduce the EO sterilant used in the sterilization process to achieve the prescribed sterility assurance level.

The program includes innovative approaches to EO sterilization, such as cycle design, validation strategy, and process challenge device design, all focused on the delivery of an efficient and effective process for sterilization of healthcare products.