The technical investigation of the affected device revealed a fracture of the hypotube, distal to the kink protector.The reported tip damage could not be confirmed.The cross section of the hypotube was not circular, which indicates that the hypotube most likely fractured as a result of significant bending.The balloon is well folded and shows no signs of inflation.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.Based on the conducted investigation of the device under complaint, no manufacturing related root cause could be determined.
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