(b)(4).The device was not returned for analysis.Possible factors that may contribute to difficult to position through an introducer sheath may include, but are not limited to: damage to the stent, damaged to the device, damage to the introducer sheath.In this case, it is possible that the outer diameter of the introducer sheath may have been too large that during advancement the introducer sheath encountered resistance and/or became entrapped with the previously implanted stent resulting in the reported stretched stent implant; however, this cannot be confirmed.The investigation was unable to determine a conclusive cause for the reported difficult to position.The reported material deformation and additional therapy non-surgical treatment appear to be related to circumstances of the procedure.There is no indication of a product quality issue with respect to design, manufacture or labeling of the device.
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