Many sterile filters can withstand multiple autoclave cycles or steam-in-place (SIP) sterilization to demonstrate their durability or to meet the user’s need for repeated sterilization. However, due to cumulative dose effects, multiple gamma irradiation sterilizations are generally not recommended. Furthermore, subjecting a filter that has already been gamma-irradiated to subsequent steam sterilization is often difficult to achieve.
The suitability of a rest sterilization process must be confirmed by the filter manufacturer.
When choosing to rest sterilize a sterile filter, the user must ensure that the rest sterilization process and the number of cycles do not adversely affect the filter or the product. Rest sterilization conditions, the number of cycles, and the cumulative sterilization time must all be validated.
Sterile filters should be discarded after processing a single product batch. However, in cases where reuse is justified, the filter validation must integrate integrity testing, bacterial challenge testing, and cleaning validation with the maximum number of use cycles.
Additionally, it is important to note that different sterilization methods have varying impacts on extractables and leachables, which must be evaluated. For instance, subjecting a previously gamma-irradiated filter to steam sterilization may increase extractable levels. Therefore, the combined irradiation and steam rest sterilization of sterile filters must be validated.
TL;DR.
Yes, but only after proper assessment and validation.