It was reported that the procedure was to treat a mildly calcified, moderately tortuous lesion in the right common iliac artery.A 10x39mm omni elite 35 balloon-expandable stent system (bess) was inserted into a 6f non-abbott sheath with strong resistance, and advanced with force towards the right iliac artery.The stent could only be advanced so far before it would no longer advance and could not be removed from the sheath.The stent was not implanted, and the bess and the sheath were removed as a single unit.A non-abbott device was used to successfully complete the procedure.There was no adverse patient effect and no clinically significant delay in the procedure.No additional information was provided.
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A visual and functional inspection was performed on the returned device.The reported difficult to advance/position and difficult to remove were confirmed.Additionally, it was noted that the shaft was kinked.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 similar incidents from this lot.The investigation was unable to determine a conclusive cause for the reported difficult to advance/position and difficult to remove; however, factors which may contribute to difficulty advancing and removing the device in the introducer sheath include, but are not limited to, damage to the stent, introducer sheath size selection or procedural technique (devices not properly supported or coaxially aligned).In this case, it may be possible that the inner diameter of the introducer sheath was smaller than the recommended diameter of 0.085 inches (2.15 mm) indicated on the omnilink elite product label.It should be noted that there is no specific industry definition of 6f guide catheter / introducer sheath dimensions or what it means to have a product that is 6f compatible.The only guidance the sheath producers have is to make the inner diameter larger than 2.00mm and smaller than 2.33mm.This contrasts with the convention for guiding catheters and introducer sheaths that have a clear definition of a maximum outer diameter of 2.0mm.The lack of clear industry guidance may be a contributing factor to why there is a broad range of inner diameters found in commercial introducer sheaths.In addition, it is likely further manipulation of the device during advancement contributed to the observed kinked shaft.There is no indication of a product quality issue with respect to manufacture, design, or labeling.Na.
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