It was reported that during a procedure of the heavily tortuous left main (lm) artery, using a jl4.0 therapeutic catheter and whisper ms guide wires, a 4.0 x 28 mm xience xpedition stent was implanted.A 3.0 x 28 mm xience xpedition stent delivery system (sds) was advanced, but met resistance in the therapeutic catheter due to the angulation and the multiple guide wires.The 3.0 x 28 mm xience xpedition sds was removed from the anatomy with resistance; however, it was noted that the stent implant had dislodged and could not be located in the anatomy.A different 3.0 x 28 mm xience xpedition stent was implanted to complete the treatment of the lm.There was no reported adverse patient sequela.There was no reported clinically significant delay in the procedure.No additional information was provided.
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(b)(4).Evaluation summary: the device was returned for analysis.The stent dislodgement was able to be confirmed; however, the difficult to position and remove the guide wire was unable to be confirmed.Based on a visual, dimensional and functional inspection of the returned device, there is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.The investigation determined the reported difficulties appear to be 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 identified no other similar incidents reported from this lot.Based on the information reviewed, there is no indication of a product quality issue with respect to the design, manufacture or labeling of the device.
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