This section addresses the principles and validation of radiation-based sterilization processes, including gamma and electron beam methods, used for terminal sterilization of medical and pharmaceutical products. It covers dose determination, dose mapping, bioburden assessment, routine dose control, and requalification strategy to ensure consistent sterility assurance in accordance with regulatory expectations.
Gamma radiation sterilization uses ionizing photons emitted by sealed Cobalt-60 sources to deliver a controlled absorbed dose to a defined product and packaging configuration. When the sterilization dose has been substantiated and the process has been validated, gamma irradiation can…
Electron beam sterilization uses high-energy electrons generated by an electrically powered accelerator to deliver a controlled absorbed dose to a defined product and packaging configuration. Unlike gamma irradiation, e-beam does not depend on a continuously radioactive source. The accelerator produces…
Radiation sterilization validation establishes and maintains evidence that a defined product receives an absorbed dose sufficient to achieve the specified sterility assurance level without exceeding the dose the product and packaging can tolerate. The same overall validation framework applies to…