The device was not returned for analysis.The reported resistance, difficult activation, material deformation and stretch could not be confirmed.The lot history record (lhr) for this product could not be reviewed because the product was not returned for evaluation and the part and lot numbers were not reported.The investigation could not determine the cause for the reported resistance, difficult activation, material deformation and stretch.It is possible the ratchet did not release immediately from the stent due to the procedure circumstances during retraction of the ratchet, causing the activation difficulty and deformation, however, this could not be confirmed.The additional therapy was due circumstances of the procedure.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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It was reported that the procedure was performed to treat a heavily calcified, mildly tortuous superficial femoral artery.Pre-dilatation was done with a 4mm and 5mm balloon.Three supera stents were implanted (two 4.5x120mm and one 4.5x150mm).During deployment of the supera stent (unknown which one) using a 6f sheath (10cm) and a 0.018" non-abbott guidewire, the deployment lock was unlocked and the thumb slide advanced to the most distal position on the handle.Resistance was felt with the thumbslide, but the stent was ultimately deployed.The stent became invaginated and stretched.Post-dilatation was done with good results.There was no adverse patient sequela reported.No additional information was provided.
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