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(b)(4) the customer returned one opened super arrow flex sheath set for analysis.Signs of use were observed in the form of biological material.Upon receipt, the dilator was advanced through the sheath.The dilator was removed from the sheath for inspection.Visual analysis revealed significant deformation to the distal tip of the dilator.White residue was observed at the distal tip of the sheath.No other defects or abnormalities were observed.The inner and outer diameter of the distal tip of the dilator was unable to be accurately measured due to the deformation.The returned dilator was functionally tested per the instructions for use (ifu) provided with this device.The ifu instructs the user, "thread tapered tip of sheath/dilator assembly over guidewire.Grasping near skin, advance assembly into vessel with slight twisting motion to desired position." a lab inventory 0.035" guidewire was used.The outer diameter of the guidewire measured 0.0331".The dilator was advanced over the proximal end of the guidewire.Resistance was noted as the guidewire reached the proximal end of the dilator.The guidewire was removed, and an attempt was made to advance the guidewire through the proximal end of the dilator hub.A small amount of hard, translucent foreign material was dislodged.A second attempt was then made to advance the distal tip of the dilator over the proximal end of the guidewire.A larger piece of foreign material was dislodged.Once the foreign material was cleared from the dilator lumen, the guidewire was able to be passed through the dilator with no resistance.The foreign material dislodged during functional testing was sent for ftir analysis.The testing results indicated that the material is likely recrystallized saline, possibly from flushing of the dilator performed prior to use in the clinical setting.Manufacturing and design assurance were contacted as part of this investigation.As the foreign material was not identified to be manufacturing related, and the damage was identified during use, it was determined that the root cause is undeterminable.A device history record review was performed, and no relevant findings were identified.The ifu provided with this kit warns the user, "do not apply excessive force in removing guidewire or sheath/dilator.If withdrawal cannot be easily accomplished, determine cause using fluoroscopic guidance and request further consultation, if necessary." the customer report of a damaged dilator tip was able to be confirmed through investigation of the returned sample.Visual analysis revealed deformation to the distal tip of the dilator.During functional testing, multiple pieces of hard, translucent foreign material were dislodged from the dilator lumen.These pieces were tested using ftir analysis.The results indicate that the material is likely recrystallized saline and did not originate from any part of the manufacturing process.After the foreign material was cleared, the dilator was able to be advanced over a lab inventory guidewire with no resistance.A device history record review was performed, and no relevant findings were identified.Based on the customer report that the defect occurred during use and the appearance of the damage to the dilator tip, the root cause appears consistent with damage due to undue force when inserting the dilator over the guide wire; however, the root cause cannot be determined as it is unknown if the damage to the dilator tip occurred before or after the customer handled.Teleflex will continue to monitor and trend for reports of this nature.
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