(b)(4).Device evaluated by mfr.: the complaint device was returned for analysis.Returned product consisted of a coyote balloon catheter.The balloon was loosely folded.There was contrast and blood in the inflation lumen.The outer shaft, inner shaft, balloon and tip were microscopically examined.There was tip damage.Functional testing using an inflation device to inflate the balloon to the rated burst pressure revealed a pinhole in the balloon material.There was no evidence of any material or manufacturing deficiencies contributing to the damage and the reported difficulty.Inspection of the remainder of the device presented 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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