(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 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 rings #1 and #2 has broken adhesive and fluids under them.The steering knob and the tension control knob functioned properly on both lock and unlock positions.The right and left curves are placed in the template shaded areas, the device passed the dimensional test.However, the device has a kink at the distal section.As per x ray image, the center support is kink.Complaint confirmed, the returned device has a kink at the distal section while in the neutral position, however, the device passed the curve dimensional test.As per x ray image, the center support was found kinked.In addition, the device has broken adhesive on tip and the rings #1 and #2 and fluids under them.The ring damage location match with kink location, so the adhesive probably broke due to the kink.The manufacturing batch record review confirmed that the device met all material, assembly and performance specifications.The most probable root cause is operational context as device performance was limited due to anatomical procedural factors.(b)(4).
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