Visual analysis was performed on the returned device.The reported difficulty advancing and difficulty removing was unable to be confirmed on the returned unit as it was related to circumstances of the procedure.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 revealed no other similar complaints reported from this lot.It should be noted that the absolute pro instructions for use (ifu) states: ¿the safety and effectiveness of multiple overlapping stents have not been established.However, when multiple stents are required, stent materials should be of similar composition.¿ additionally, section 6.4 states: ¿exercise great care when crossing a newly deployed stent with a guide wire, balloon or delivery system to avoid disrupting the stent geometry.¿ in this case, it appears that interaction with the previously implanted stent while advancing distal to the stent contributed to the difficulties encountered.However, it is not known if the previously implanted stent was from a previous procedure.Based on the reported information, the difficulty advancing and difficulty removing were likely the result of interaction with the struts of the previously implanted stent.It may be possible that the previously implanted stent was not fully apposed to the vessel wall or was implanted within an angulation of the vessel resulting in the absolute pro interacting with the proximal end of the stent struts while advancing distal to the stent during advancement.When treating multiple lesions, the distal lesion should be initially stented, followed by stenting of the proximal lesion.Stenting in this order obviates the need to cross the proximal stent in placement of the distal stent and reduces the chances for difficulties or damage to the stent and/or delivery system.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.H6: medical device problem code 2524 removed.
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