It was reported that the procedure was to treat a heavily calcified subclavian artery that is 90% stenosed.The 9.0x39mm omnilink elite balloon expandable stent was attempted to cross the lesion; however, after several attempts the stent was not able to cross.It was noted there was resistance felt during advancement with an unspecified guide wire.Another same size device was used to successfully complete the procedure.There were no adverse patient effects and no clinically significant delay in the procedure.Per device analysis the stent was dislocated on the balloon proximally, where the distal end of the stent was 2.5 millimeters proximal to the distal balloon marker.No additional information was provided.
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A visual, dimensional, and functional inspection was performed on the returned device.The reported difficult to advance was not confirmed.The reported failure to advance could not be evaluated as the exact anatomical conditions encountered by the device used during the procedure could not be replicated in the test laboratory.In this case, it is possible the device interacted with the challenging anatomy during advancement, as resistance was reported, resulting in the reported failure to advance, ultimately causing the observed stent dislodgement.Further interaction with the anatomy during retraction of the device may have also contributed to the noted material deformation (stretched, bent, flared and lifted stent struts); however, this cannot be confirmed.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 incidents.A conclusive cause for the reported difficulties could not be determined.There is no indication of a product quality issue with respect to manufacture, design, or labeling.
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