(b)(4).The customer returned one peel-away catheter for analysis.Signs of use in the form of biological material were observed on the sheath tabs.Visual analysis revealed that both peel-away sheath tabs were separated from the extrusion.Despite this, a portion of the proximal end of the peel-away extrusion was still molded to both tabs.The point of separation occurred right at the distal end of the tabs.Microscopic examination confirmed the damage and revealed that the point of separation was stretched and folded.It was also noted that the score lines on the portion of the extrusions still molded on the tabs did not tear correctly.No obvious defects or anomalies were observed with the separated portion of the sheath extrusion.The sheath length from the point of separation to the distal tip measured 2 3/4", which is within the specification limits of 2 5/8"-2 7/8" per the catheter peel-away product drawing.The sheath outer diameter measured 0.0805", which is within the specification limits of 0.07800"-0.08400" per the catheter peel-away extrusion product drawing.The sheath inner diameter at the distal tip measured 0.064", which is within the specification limits of 0.064"-0.065" per the catheter peel-away product drawing.The sheath inner diameter at the proximal end (separated end) could not be accurately measured due to the nature of the separation.The separated portion of the peel-away extrusion was split down the score lines.Minor difficulty was initially encountered at the proximal end (separated end) due to the stretching; however, the sheath was eventually able to split completely down both score lines as intended.A device history record review was performed, and a potentially relevant finding was identified.A non-conformance was initiated for batch 34c22c0033 to address the sheath not peeling correctly.The ifu provided with the kit informs the user, "do not use excessive force when introducing guidewire, peel-away sheath over tissue dilator, or tissue dilator as this can lead to vessel perforation and bleeding, or component damage".The ifu also states, "avoid tearing sheath at insertion site which opens surrounding tissue creating a gap between catheter and dermis".The report that the peel-away sheath tabs broke off during use was confirmed through complaint investigation of the returned sample.Visual analysis revealed that both sheath tabs separated from the extrusion.Despite this, a portion of the proximal end of the extrusion was still adhered to the separated tabs.The sheath met all relevant dimensional requirements.It was determined that the observed failure mode likely occurred during the manufacturing (molding) process.A non-conformance was initiated to further investigate this complaint issue.Teleflex will continue to monitor and trend for reports of this nature.
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