(b)(4).Evaluation summary: the device was returned for analysis.The reported collapsed tip was able to be confirmed.The reported difficult to position and the reported difficult to remove the device was unable to be replicated in a testing environment as they were based on operational circumstances.Based on a visual and dimensional of the returned device, there is no indication of a product deficiency.A review of the lot history record revealed no non-conformances that would have contributed to the reported event.A query of the electronic complaint database revealed no other similar incidents reported for collapse, difficult to position or difficult to remove from this lot.Based on the reviewed information, no product deficiency was identified.It should be noted that the xience xpedition everolimus eluting coronary stent system instructions for use (ifu) states: if removal of a stent system is required prior to deployment, ensure that the guide catheter is coaxially positioned relative to the stent delivery system, and cautiously withdraw the stent delivery system into the guide catheter.Should unusual resistance be felt at any time when withdrawing the stent towards the guide catheter, the stent delivery system and the guide catheter should be removed as a single unit.
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