Qn # (b)(4).The report that the guide wire unravelled was confirmed through examination of the returned sample.The customer provided three photos for analysis and returned an opened hemodialysis kit including a swg and its advancer.The swg was not within its advancer.The components showed signs of use in the form of dried blood.Visual examination revealed the guide wire was unravelled from the proximal weld and was kinked in several locations along the body.The distal j-bend was not misshapen and was intact.Microscopic examination of the guide wire confirmed the core wire was broken adjacent to the proximal weld.The core wire tip was tapered and discoloured at the point of separation.Both welds were present and appeared full and spherical.The major kinks in the guide wire body were measured at 245mm, 286mm, and 334mm via calibrated ruler from the distal tip.The broken core wire measured 684 mm in length via calibrated ruler, which was within the specification of 678-688 mm per guide wire product drawing; therefore, no pieces of the core wire appear to be missing.The outside diameter (od) of the guide wire measured 0.844 mm via calibrated micrometer which was within the od specification of 0.838-0.877 mm per guide wire product drawing.Functional testing was performed per the instructions-for-use (ifu), "advance guidewire into arrow raulerson syringe approximately 10 cm until it passes through syringe valves or into introducer needle." the distal end of the guide wire was advanced through a lab inventory ars/18ga introducer needle assembly, and the undamaged portions of the guide wire pass through both components with little to no resistance.A manual tug test confirmed that the distal weld was intact.The instructions for use (ifu) provided with this kit warns the user, "do not apply excessive force in placing or removing catheter or guidewire.Excessive force can cause component damage or breakage." a device history record review did not reveal any evidence of a manufacturing related issue.Arrow guide wires of this size were designed and manufactured to withstand a tensile force of 2.75 pounds force.The selected insertion site and patient anatomy might present a tortuous path that could contribute to the possibility of guide wire kinking.Guide wire breakage might occur if a force greater than the design specification was applied during removal.Based on these circumstances, unintentional use error likely contributed to this event.Teleflex will continue to monitor and trend for reports of this nature.
|