(b)(4).Device evaluated by mfr: unit returned in a generic plastic bag.The unit returned has distal end kinked, as part of overall visual revision.The returned device matches with upn and lot number provided by the customer.The device has a kink at 13mm from the tip while in the neutral position (between ring 1 and 2).In addition the ring #1 and #2 have broken adhesive and fluids under them.As per x ray image attached, the center support is kinked.The manufacturing batch record review confirmed that the device met all material, assembly and performance specifications.The most probable root cause was unable to be determined.(b)(4).
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