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European Pharmacopoeia: New Chapteron Visual Inspection for Visible Particles 欧洲药典:新章节-可见异物目视检查
The EDQM haselaborated a new chapter on testing of parenterals for visible, particulatecontamination - as you could already read in New Ph. Eur. Developments in the Visual Inspection of Injectables. The newchapter is of advisory nature. Indeed, it is entitled "Recommendationson testing of particulate contamination: visible particles". Ithas now been officially published for comments in Pharmeuropa 30.4. Therequirements for the test methods used for the test on visible particles canstill be found in the mandatory chapter 2.9.20. Particulatecontamination: visible particles. The new chapterdifferentiates extrinsic particles from intrinsic ones. The firsts areimpurities from the environment, equipment or packaging like for example hair,fibres or glass. The latter are impurities from the formulation, the product orthe excipients themselves, or the process such as proteinaceous particles,silicone droplets, or inorganic precipitates. Both types of particles should beavoided. However, it is indicated that the particle may be the product itselfin some medicines (like in cell therapy or dispersions). Besides, it ispointed out that some products may be difficult to visually inspect because oftheir nature like for example opalescent, coloured or opaque solutions, orlyophilisates too. In such cases, measures should be taken to improve thedetection rates. They include - among other things - extended inspectiontimes to more than 5 s against both black and white backgrounds, orthe use of light intensities higher than 3750 lux (asdescribed in chapter 2.9.20). For the firsttime, the Ph.Eur. speaks of an additional AQL testing withregard to ISO standard 2859-1 in the context of a 100 per centinspection. This testing should confirm that the 100 per cent inspection hasbeen performed correctly and that all containers with particles havebeen eliminated. According to the EDQM, different AQL levels should be defined,for example for minor, major or critical defects. In addition,according to the new chapter it is possible to omit anadditional quality control test for particles in the context of thebatch release, if both the 100 per cent inspection performed during production(manual or automatic) and the AQL testing were successful. This doesn't applyto lyophilisates where additional samples have to be reconstituted andtested. Yet, the newchapter states that although the objective is zero particle procontainer, this is in reality not realistic because visual inspection isprobabilistic in nature. No general recommendation is given on that. The new draftchapter is in compliance with the Best Practice Guidance document of the ECA Visual Inspection Group. The new chapteris freely available on the EDQM website under "Texts forcomment" after registration (for free).
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