It was reported that the procedure was to treat a lesion in the left circumflex (cx) artery.After laser atherectomy on the lesion, the 2.75x15mm nc trek balloon dilatation catheter (bdc) was advanced, but backflow was noted as the non-abbott bleedback valve was not tightened enough.The valve was tightened, and the backflow subsided.The bdc was then advanced, but the shaft separated because the valve was too tight.The device was removed without issue.There was no adverse patient effect and no clinically significant delay in the procedure.No additional information was provided.
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Visual inspection was performed on the returned device.The reported separation was confirmed.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 incidents and/or complaints from this lot.It was reported by the account that the separation of the balloon dilatation catheter (bdc) shaft was due to the valve being over-tightening.It should be noted that the coronary dilatation catheters (cdc), nc trek rx, global, instruction for use (ifu) states: do not torque the catheter more than one (1) full turn.It is likely that the violation of the ifu contributed to the reported shaft separation.The investigation determined the reported separation appears to be related to user error.There is no indication of a product quality issue with respects to the design, manufacture, or labeling of the device.Code 2017 was added for over torqueing the device.
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