The returned instrument was subjected to a detailed 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 complaint instrument was returned in two parts.The distal balloon fragment is compressed, indicating that this part of the balloon got caught during the device withdrawal.The inner shaft has fractured proximal to the proximal x-ray marker and is severely elongated, indicating that a high tensile force was present.The balloon has burst transversally and several deep scratches were found on the balloon surface near the fracture site.The review of the manufacturing history of the production lot did not reveal any nonconformity.The complaint instrument was manufactured according to specifications and successfully passed all in-process inspections as well as the final inspection, including both a leakage and pressure test.Based on the conducted investigations of the device being subject to this complaint, no manufacturing or material related root cause was determined.The transversal burst pattern was most likely induced by the target lesion.
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