Internal file number - (b)(4).Evaluation summary: a visual inspection was performed, and the reported winged/wrinkled balloon was confirmed.The reported difficulty to remove the device from the guiding catheter could not be confirmed due to the condition of the balloon.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history identified no similar incidents reported from this lot.It should be noted that nc trek rx, instructions for use states to use: 60% contrast medium diluted 1:1 with normal saline.In this case, the use of a 50:18 contrast solution mix does not appear to have contributed to the reported complaint.The investigation determined the reported/noted difficulties of difficult to remove, winged/wrinkled balloon and stretched inner/outer member appear to be related to circumstances of the procedure.It is likely that the balloon was not fully deflated during retraction causing resistance with the distal end of the guiding catheter resulting in the winged/wrinkled balloon and stretched materials at the mid-lap seal.There is no indication of a product quality issue with respect to design, manufacture or labeling of the device.
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