(b)(4) device evaluation: the report that the guide wire unraveled during use was confirmed.One 3-l 7 fr x 20 cm catheter with an unraveled guide wire inserted through it was returned.Visual examination revealed a 2mm section of the guide wire was protruding from the catheter tip.An unraveled section of the guide wire was protruding from the proximal end of the distal luer hub.Microscopic examination determined that the core wire is broken adjacent to the distal weld.A manual tug test confirmed that the proximal weld remains intact.The guide wire drawing specifies a length of 600 +/- 4 mm and a diameter of.788/.826 mm.The broken core wire was confirmed to be consistent with the guide wire graphic; therefore, no pieces appear to be missing.The diameter of the guide wire measured 0.797 mm.The catheter showed evidence of use but no defects or anomalies were observed.A.035" gage wire was passed through the distal lumen which meets the requirements of the catheter graphic.Instructions for use describes suggested techniques to mini mize the likelihood of guide wire damage during use.The instructions caution that withdrawing the guide wire against other remarks: the needle bevel or use of excessive force during removal could damage or break the wire.A device history record review was performed and did not reveal any manufacturing related issues.The selected insertion site and patient anatomy may present a tortuous path that could contribute to the possibility of guide wire kinking.Guide wire breakage may occur if a force greater than the design specification is applied during removal.Based on these circumstances, operational context caused or contributed to the event.No further action will be taken.
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