Customer report of pacing issue was confirmed.Continuity testing found that the distal circuit had an intermittent condition around the tip, when flexing the tip area of the catheter.The proximal circuit was continuous without any intermittent or open condition.No short condition was observed between the proximal and distal lead wires.A cut down was performed to isolate the intermittent condition and the intermittent condition was found to be around catheter tip.It was confirmed that the distal circuit was continuous from just proximal side of the proximal electrode to distal connector pin the balloon inflated clear and concentric and remained inflated for 5 min.Without leakage.No visible damage was observed from windings, balloon, returned syringe and catheter body.Engineering task assigned to manufacturing site for further investigation.An engineering evaluation was initiated to assess for any manufacturing related processes which could be correlated to the complaint.A product risk assessment was previously generated to cover full open and intermittent condition at tip for bipolar pacing catheters for products nonconformance with moderate, major, or critical severity.Additionally, a capa was generated to address the pacing difficulty failure effect for bipolar products with full open, intermittent, and short conditions.The root cause was related to manufacturing.Complaint histories for all reported events are reviewed against trending control limits on a monthly basis and any excursions above the control limits are assessed and documented as a part of the monthly review.
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