(b)(6).Complaint conclusion: the balloon catheter, as received from the field, showed evidence of having burst.Due to the rupture, it was not possible to investigate the balloon for leaks.The only defect found during the catheter outer surface inspection of the balloon area was a longitudinal tear of 20mm from the proximal seal to the distal seal.This finding indicates that the balloon was over inflated resulting in stretching of the balloon, which in turn led to the rupture.The root cause appears to be balloon over inflation.One of the possible failures when the balloon is over inflated is balloon leakage.Additional pressure on the balloon may further lead to longitudinal tears.The instructions for use (ifu) for the ascent balloon catheter caution against over expanding the balloon, and an inflation guide is also provided to the ifu for reference.Codman performs 100% leak testing on each lot of balloon catheters before release to distribution; therefore, it is unlikely that the balloon was shipped in this condition.No corrective action was taken.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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