1.在清洁验证中,目视检查的限度是否需要做验证?这种类型的验证该如何开展?有没有相应的参考法规?问题来源:我们将目视检查限度、基于PDE、最大日服用剂量、HBEL计算的限度作为残留限度计算的基础,选择4者中的最严限度作为最终的残留限度。国外客户审计时,提出缺陷,缺陷原因是目视检查的限度未经过验证。
2.公司的质量管理体系中,研发体系和商业化体系是否需要分开管理?如果要分开管理,业界内研发体系的分界点是怎么划分 的(如工艺开发阶段、临床一期、二期、三期、NDA)?
关于第一个问题: 目视检查的限度可参考ISPE Cleaning Validation Lifecycle Applications, Methods, and Controls 6.3 Visual Inspection and Criteria
进行课件残留物限度研究,具体的标准和方法可参考以下内容:
6..1 Visible Residue Limit Studies
It is possible to conduct Visible Residue Limit (VRL) studies to determine the level of visible detection of residues
for many soilants and surfaces. A method to determine the detection level is by spiking decreasing amounts of each
residue onto testing coupons representative of equipment surfaces, allowing them to dry, and then having them
viewed by a group of observers. Multiple observers should view the residues under different light levels, from different
distances, and from different angles to mimic actual visual inspection conditions in order to provide a more rugged
visual limit.
"The lowest residue amount that is visible to all observers is the visual detection limit for that product." [3]
If the residues can be consistently observed at a known residue level, and this level is much lower than the cleaning
acceptance criteria, then VC provides a high degree of confidence that the equipment is sufficiently cleaned. Even
with a visual limit in place, VC is predominately not considered adequate by itself for establishing cleaning validation.
Direct surface sampling (e.g., swabs or TOC rinse measures) is also required [17]. However, VC could be used as a
criterion along with periodic sampling in a routine monitoring program after the cleaning validation is complete [79]. If
historical data shows that the visual limit is higher than what was obtained via coupon studies, launch an investigation
to verify. If the out of specification is correct, then raise the VRL.
For the VRL to have value, the data or results for the margin of safety for VI (distance between the safety limit and the
residue level represented by the VRL) must be sufficiently large to compensate for the variability between operators
performing the VI and also the inherent variability of the VI itself. Operators performing VRL determinations should
be qualified in the method. VI for VRL determinations should be performed by an operator and verified by a second
operator prior to the equipment being released for use. In addition, a periodic review of the controls is necessary after
the cleaning process has been qualified to ensure that performance has not been negatively impacted by increased
or new sources of variability and to confirm that a VRL is still a valid and justified approach.
If the VRL is at a level above the cleaning acceptance criteria, then VC has limited value in determining whether the
equipment is sufficiently cleaned
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