(b)(4).Device evaluated by mfr.: returned product consisted of a nc quantum apex balloon catheter in two pieces.The balloon was loosely folded and there was blood in the lumen.The balloon, markerbands, proximal weld, and shaft were microscopically inspected.Inspection revealed numerous kinks in the hypotube, with the device separating at the distal edge of the port/exit notch.The separation is consistent with excessive tensile force.The port/exit notch was also revealed to have damage (stretched and perforation).Functional testing could not be done, due to the condition of the returned device.Microscopic inspection found the remainder of the device free of damage.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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