It was reported that the procedure was performed to treat a 99% stenosed and moderately tortuous lesion in the left main artery to the mid left anterior descending artery (lad).Following pre-dilatation, st elevation was noted.Aspiration was performed with a thrombectomy device and medication was administered.The st elevation was still slightly noted.Three xience sierra stents (2.25x38mm, 3.0x38mm, and 3.5x23mm) were deployed in the mid lad to the left main artery from the distal side.Proximal optimization technique was also performed in the mid lad and proximal lad with 3.25mm non-abbott balloon catheter.For kissing balloon technique of the lad artery and the 1st diagonal artery, a 2.5x8mm nc trek balloon dilatation catheter (bdc) was chosen.The bdc was prepared; however, the stylet was not removed before prep.Additionally, resistance was noted when removing the stylet from the bdc.An attempt was made to insert the bdc onto a non-abbott guide wire; however, the bdc failed to be inserted onto the guide wire.It was thought that the lumen of the bdc collapsed during removal of the stylet.The bdc was not used and the procedure was successfully completed with a 2.5x6mm non-abbott balloon catheter.There were no adverse patient effects and no clinically significant delay in the procedure.No additional information was provided.
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The device was returned for analysis.The reported difficult to remove mandrel/stylet was able to be confirmed.The reported deformation due to compressive stress was able to be confirmed.The reported difficult to insert guide wire was unable to be 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 similar incidents from this lot.It should be noted that the nc trek rx coronary dilatation catheter instructions for use (ifu) states: prior to use examine all equipment carefully for defects.Examine the dilatation catheter for bends, kinks, or other damage.Do not use any defective equipment.The deviation of the ifu is undetermined to have cause/contributed to the reported difficulties.It is possible that inadvertent mishandling when removing the stylet resulted in compromising the inner member and outer member (reported collapsed/note smashed) resulting in the reported difficult to remove mandrel/stylet; however this cannot be confirmed.The reported difficult to insert guide wire is a direct result of the compromised inner member and outer member.There is no indication of a product quality issue with respect to manufacture, design or labeling.H10: use error for incorrect prep was removed.
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