Ascent balloon catheter 4 mm x 7 cm (brs00040700/f38914) burst during correct preparation.The length between the proximal seal and the distal seal was 10.0 mm which means that the balloon was over stretched and as a result the unit was damaged.Prior investigations revealed that one of the possible failures when the balloon is over inflated is the occurrence of leaks which, with additional pressure on the balloon, may lead to longitudinal tears.Therefore, the root cause appears to be balloon over inflation.100% leak testing is performed on each balloon catheter before it is release to determine whether the vent hole is open and whether or not the balloon leaks, so it is not likely that the balloon left micrus with a leak or rupture.Complaint was confirmed.A review of the manufacturing records was conducted and no outstanding discrepancies, design, or quality concerns were found.No corrective actions will be taken at this time.This mdr is being submitted as part of a retrospective review as the result of a recent fda audit and with accordance to the requirements of code of federal regulations ¿ 21 cfr part 803, medical device reporting.
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