The user facility reported that during an animal study, while attempting to get access in the femoral artery, there was resistance inserting the wire through the needle.When removing the wire there was also some resistance.Once the wire was out of the body, it was noticed that the wire tip was sheared off.The residual wire was seen on ultrasound and fluoroscopy.The wire appeared outside of the artery (in the tissue track) on ultrasound.A 5fr pinnacle precision was used.The vessel size was initially approximately 5mm.The vessel was healthy and without disease.The procedure outcome was successful, and the patient was stable.
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This report is being submitted as follow up no.1 to update section h3, and to provide the completed investigation results.One ik precision nitinol guidewire was returned for product evaluation.Visual inspection was performed.The guidewire was missing its tip, had a broken segment separated from the main body, and had a region of open coil.Dimensional testing was performed.The overall length was measured to be 42.6cm, the open coil region was 37.4-39.6cm from the stiff end, the breakage occurred at 40.7cm from the stiff end, and the broken segment was 0.8cm long.The outer diameter could not be measured due to the state of the device.The complaint can be confirmed for guidewire separation based on the state of the returned device.The exact root cause cannot be determined.He likely root cause is that the guidewire experienced relative motion back through the needle which caused it shear.Review of dhr showed there were no issues noted during manufacture of the product that could have contributed to this complaint condition.Currently no action is recommended since this risk evaluation is within the predetermined limits in the fmea.
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