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请教各位老师:
根据欧盟新的无菌附录和中国的无菌附录征求意见稿,我想问下:
对于冗余过滤系统,对于两个除菌过滤器(冗余+主过滤器)在设计时(新建车间)是否两个除菌过滤器均需要设计PUPSIT才能满足法规的要求,还是可以只做主过滤器,冗余过滤器可以不用?
附EU GMP和中国GMP征求意见稿原文:
- [color=rgb(0, 0, 0) !important]8.87:The integrity of the sterilised filter assembly should be verified by integrity testing before use (pre-use post sterilisation integrity test or PUPSIT), to check for damage and loss of integrity caused by the filter preparation prior to use. A sterilising grade filter that is used to sterilise a fluid should be subject to a non-destructive integrity test post-use prior to removal of the filter from its housing. It is recognized that PUPSIT may not always be possible after sterilisation due to process constraints (e.g. the filtration of very small volumes of solution). In these cases, an alternative approach may be taken providing that a thorough risk assessment has been performed and compliance is achieved by the implementation of appropriate controls to mitigate any risk of a non-integral filtration system.
- [color=rgb(0, 0, 0) !important]8.92:In a redundant filtration system (where a second redundant sterilising grade filter is present as a backup but the sterilising process is validated as only requiring one filter), post-use integrity test of the primary sterilising grade filter should be performed and if demonstrated to be integral, then a post-use integrity test of the redundant (backup) filter is not necessary. However, in the event of a failure of the post-use integrity test on the primary filter, post-use integrity test on the secondary (redundant) filter should be performed, in conjunction with an investigation and risk assessment to determine the reason for the primary filter test failure.
第一百八十七条 除菌过滤器组件应当在使用前灭菌后进行完整性测试。用于药液除菌的除菌过滤器,应当在使用后从外壳中取出前进行完整性测试。应当采用经验证的方法进行完整性测试,依据过滤系统验证确定的标准对测试结果进行判定。 由于工艺限制(如药液量很少)无法在使用前灭菌后进行完整性测试时,可以在全面风险评估并采取适当控制措施后使用替代方法。风险评估中需考虑的要点至少包括: (一)过滤器灭菌过程中的温度、压差、装载方式等关键灭菌参数的控制,最大程度降低过滤器损坏的可能性。 (二)过滤器的供应链及控制: 1.过滤器供应商的灭菌设施; 2.运输方式; 3.已灭菌过滤器的包装方式,是否能够避免在运输和储存过程中损坏过滤器。 (三)相关的无菌生产工艺: 1.具体的产品类型,包括微粒水平以及是否存在影响过滤器完整性的风险; 2.在最终除菌过滤之前是否有预过滤和处理步骤。
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