It was reported that during a coronary intervention, the 4.00 x 20mm trek balloon dilatation catheter was advanced to the lesion.Upon inflation of the balloon, it was noted that inflation was slow before reaching nominal pressure, so the device was attempted to be removed; however, resistance was noted with the 0.014 guide wire, so both devices were removed as a single unit.Once removed, a leak was observed at the junction with the monorail guiding catheter.There was no reported adverse patient effect and no clinically significant delay in the procedure.Another unspecified device was used to continue the procedure.No additional information was provided.
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Visual, dimensional and functional inspections were performed on the returned device.The reported leak and inflation issue were confirmed; however, the reported difficulty removing the device from the guide wire could not be confirmed.Return analysis noted the guidewire exit notch was torn, stretched and the material was lifted on the distal end.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history identified no other similar incidents and/or complaints from this lot.The investigation was unable to determine a conclusive cause for the reported inflation issue, difficulty removing the device from the guide wire or leak.Possible factors that may contribute to difficulty inflating the balloon may include, but are not limited to, manufacturing, poor connection with the inflation device, damage to the guide wire and/or inflation lumen, patient anatomical morphology, and patient disease state.Additionally, possible factors that may contribute to difficult removing the bdc from the guide wire causing resistance between the devices may include, but not limited to, manufacturing damage, inner diameter of guide wire lumen, condition of the guide wire, or damage to the distal shaft of the catheter.There was no damage noted to the balloon catheter prior to use or leak noted during preparation, which suggests a product quality issue did not contribute to the reported difficulties.The tearing of the guide wire exit notch could possibly have resulted from an interaction with the guide wire and/or mandrel/stylet.This type of mechanical damage can occur if an attempt is made to pull the catheter in an opposite direction as the guide wire or the mandrel/stylet is mishandled during removal.In this case, it is possible that the noted tear in the guide wire exit notch resulted in the reported leak and possible inflation issue; however, it is unknown when these damages occurred.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.
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