Date of event is estimated.The udi is unknown because the part/lot number were not provided.Date of implant is estimated.The device was not returned for analysis.A review of the lot history record and similar incident review of the reported lot could not be conducted because the part and lot number were not provided.It is possible that the distal sheath of the delivery system was entrapped or bent in the anatomy such that the ratchet was unable to properly engage the stent resulting in reported physical resistance/sticking thumbslide (slide was hard) and the reported activation failure/deployment failure; however, this could not be confirmed.The investigation was unable to determine a conclusive cause for the reported difficulties.There is no indication of a product quality issue with respect to manufacture, design or labeling of the device.
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