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It was reported that a patient underwent an idiopathic ventricular tachycardia ablation procedure with a thermocool smarttouch catheter and post procedure the bwi product analysis lab identified a separation between pebax and electrode section.During the procedure, when starting the ablation the generator showed "power control" because the temperature was over the limit.In the catheter sensor, the medical team identified blood.There was no difficulty in maneuvering or withdrawing the catheter during use on the patient.No physical damages were noted with the catheter as well.The catheter was replaced and the procedure continued to completion.No patient consequences were reported.
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The product investigation was completed.Device evaluation details: the device was returned to johnson & johnson medtech (j&j medtech) for evaluation.Following j&j medtech procedures, a visual inspection and temperature and impedance test of the returned device were performed.Visual analysis revealed reddish brown material inside the pebax and a separation between pebax and electrode section.A temperature and impedance test was performed and the device was found working correctly.No temperature or impedance issues were observed.A manufacturing record evaluation was performed for the finished device lot 31433068m number and no internal action was found during the review.The reddish material inside the pebax could be related to the temperature sensor issue reported by the customer; therefore, the customer complaint was confirmed.The root cause of the pebax damage is traced to the manufacturing process.The instructions for use (ifu) contain the following recommendations: when cleaning the tip electrode, be careful not to twist the tip electrode with respect to the catheter shaft; twisting may damage the tip electrode bond and loosen the tip electrode, or may damage the contact force sensor.A significant change in the baseline reading after cleaning might indicate a damaged contact force sensor.In addition, in order to prevent damage to the catheter tip, verify compatibility between the sheath and catheter, advance the catheter through the sheath prior to insertion.Any sheath < 8.5 f is contraindicated.This product issue will be addressed through the quality system.An internal action was created for further investigation of the force sensor sleeve insolation to prevent fluids to get inside into the device.If additional information is received regarding this event, a supplemental 3500a report will be submitted to the fda.Manufacturer's reference number: (b)(4).
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