DIN EN ISO 11137-1:2026-10

Requirements for the development and validation of radiation sterilization processes

The DIN EN ISO 11137-1 specifies requirements for the development, validation and routine control of radiation sterilization processes for medical devices. It describes how sterilization processes using gamma radiation, electron beams or X-rays must be planned, validated, monitored and maintained to ensure the required sterility of medical devices. The standard supports manufacturers in establishing reproducible and demonstrably effective sterilization processes.

What is DIN EN ISO 11137-1 about?

The standard defines requirements for the use of ionizing radiation for the sterilization of medical devices. It focuses on determining the sterilization dose, validating sterilization processes, and monitoring and controlling them during routine operation. The standard also describes requirements for dosimetry, product definition, requalification and change management.

Topics covered

• Development and validation of radiation sterilization processes
• Sterilization of medical devices using gamma radiation, electron beams and X-rays
• Determination and specification of the sterilization dose
• Dosimetry and dose distribution
• Installation, operational and performance qualification (IQ, OQ, PQ)
• Process monitoring and routine control
• Requalification and change management

Practical relevance

Radiation sterilization is an established process for sterilizing many medical devices. DIN EN ISO 11137-1 provides a uniform basis for the validation, monitoring and quality assurance of sterilization processes and helps manufacturers reliably implement regulatory requirements.

Changes compared with DIN EN ISO 11137-1:2020-04

The 2026 edition has been comprehensively revised. Additional normative references to ISO 13004 and ISO/ASTM 52628 have been added. Requirements for process monitoring have also been expanded, limits for assessing possible radioactive activation have been adjusted, and provisions for transferring sterilization and verification doses between different radiation sources have been simplified. New guidance has also been added on dose auditing, bioburden determination, and new and modified normative requirements.

Target audience

• Medical device manufacturers
• Operators of irradiation facilities
• Quality management professionals in medical technology
• Specialists in sterilization and reprocessing of medical devices
• Validation and testing organizations
• Auditors and certification bodies
• Regulatory affairs and compliance professionals

Conclusion

The DIN EN ISO 11137-1 provides the fundamental requirements for the development, validation and routine control of radiation sterilization processes. It supports manufacturers and operators in demonstrating the effectiveness of their sterilization processes and ensuring the safe sterilization of medical devices on an ongoing basis.

This document replaces DIN EN ISO 11137-1:2020-04 .

And replaced by 2026-10 for:: DIN EN ISO 11137-1:2020-04 , DIN EN ISO 11137-1:2023-05 .