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(b)(4).Device evaluated by mfr: returned product consisted of a quantum maverick balloon catheter in two pieces.The balloon was tightly folded.The tip, balloon, distal shaft, and hypotube were microscopically and tactile inspected.Inspection revealed a complete separation in the hypotube located 86cm from the strain relief, with numerous kinks in the hypotube.The fracture faces of the hypotube were oval, suggesting a kink prior to the separation.The tip of the device was damaged.Inspection of the remainder of the device, apart from the observed damage, revealed no other damage or irregularities.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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