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(b)(4).Device evaluated by mfr.: returned product consisted of a quantum maverick balloon catheter in two pieces.The tip, balloon, markerbands, shaft, and bonds were microscopically and visually examined.There was contrast in the inflation lumen and blood in the guidewire lumen.The balloon was tightly folded.There were numerous kinks throughout the hypotube and the hypotube had a complete hypotube separation 53cm from the strain relief.The hypotube fracture surfaces were ovaled, which suggests the device was kinked prior to separation.Inspection of the remainder of the device, apart from the observed damage, revealed no other damage or irregularities.No other issues were identified during the product analysis.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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