((b)(4)) a visual inspection was performed on the two returned products.The patches were returned sealed in their original packaging, as they were not used during surgery.They were opened for inspection, no abnormal discoloration was observed on the patches themselves.However, the presence of glycerol (one of the raw materials) on the patch creates an interface between the patch and the blister which is responsible of this "discolored" visual effect as reported.This is a visual effect only with no impact on the product itself.No failure was detected.((b)(4)) therefore, no failure was detected.The products conform to the specification.Please note that, at the time of the initial report, the worst case was taken into account as no product identification nor product return were available.Upon receipt of the products, it appears that there was no failure.Therefore, the initial report should not has been submitted.
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