The returned product was subjected to a detailed technical analysis and the corresponding product release documentation was reviewed to establish whether a deviation from the manufacturing process could be the cause for the reported event.The technical investigation revealed two small tears in the balloon surface, one located at the proximal end and one at the distal end of the distal radiopaque marker.Scratches were observed in close vicinity of both tears which have likely been caused by a hard, sharp-edged object such as e.G.Anatomical structure.The balloon is slightly unfolded but has not been inflated.Review of the product release documentation confirmed that the instrument was manufactured according to specifications and passed all in-process and final inspections.In addition to visual inspections each instrument is tested for air tightness by means of a helium leak test.We can therefore confirm that the instrument was delivered in a leak-proof condition.Based on the conducted investigations, no material or manufacturing related root cause could be determined.The root cause for the complaint event is most likely related to the patients anatomy (i.E.Severe calcification).
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