The returned product was subjected to a technical analysis and the corresponding production documentation was reviewed to establish whether a deviation from the manufacturing process could be the cause for this event.The technical investigation revealed that the device tip is severely deformed and has necked near the tip weld.The balloon is well folded and shows no signs of inflation.The transportation wire was not returned for analysis.I in simulations with reference instruments a similar damage pattern as observed in the returned instrument could be reproduced by wrong handling (e.G.Grabbing the balloon protector in the tip area when pulling).However, inside the tip of the returned instrument dried contrast medium was observed which may have contributed to the complaint event.Review of the production documentation confirmed that the instrument was manufactured according to specifications and passed all in-process and final inspections.Every instrument is shipped with a 0.015 inch transportation wire that covers the full guidewire lumen.No difficulties in removing the transportation wire have been reported.The instrument was in accordance with the specifications at the time of delivery.Based on the conducted investigations, no manufacturing or material related root cause could be determined.
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