Visual and functional inspections were performed on the returned device.The reported inflation issue was not confirmed; however, the failure deflating the balloon was confirmed.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no other similar incidents and/or complaints from this lot.The investigation was unable to determine a conclusive cause for the reported inflation issue or failure to deflate.There was no damage reported to the bdc during the inspection prior to use which suggests a product quality issue did not contribute to the reported difficulties.Return analysis noted the shaft was stretched proximal to the proximal seal.In this case, it is possible that the device was inadvertently mishandled during preparation resulting in the noted stretched shaft and subsequently the stretched shaft contributed to the reported inflation issue and failure to deflated; however, this cannot be confirmed.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.Medical device problem code: updated from 1149 to 4060.
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