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This report is being sent as follow-up no.1 to provide the additional information in section b5 and to update section d9.The investigation is currently ongoing.A follow-up report will be submitted once the investigation is complete.Visual and microscopic inspections - it had been fractured at approximately 270mm from the distal end - there was an abrasion at approximately 16mm from the fractured section toward the rear end side - no anomaly was found in other sections.Electron microscopic inspection of the fractured section - radial patterns were found on the fractured surfaces both at the distal side and rear end side.Confirmation of dimensions - outer diameters of the hydrophilic coat and ptfe coat met the factory's specifications.No anomaly was found.History investigation of the product with the involved product code/lot number - no anomaly was found in the manufacturing history record and the shipping inspection record.- no other similar report was found in the past.Past simulation test - continuous torque force was applied while the wire was bent.As a result, the wire was fractured, and radial patterns were found on the fractured surface.- the distal end of wire was clamped with forceps and pulling force was applied.As a result, the wire was fractured, and dimple patterns were found on the fractured surface.- repeated 180° bending force was applied to the wire.As a result, the wire was fractured, side was curved, and dimple patterns were found on the fractured surface.(b)(4) (importer) registration no.(b)(4) is submitting this report on behalf of ashitaka factory of terumo corporation (manufacturer) registration no.(b)(4).
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This report is being sent as follow-up no.2 to update section h3, and to provide the completed investigation results.Simulation test using a factory-retained sample according to the circumstances of the event, glidewire advantage was used without a guiding sheath, and the angle of the mountain of common iliac artery was steep.Therefore, the following simulation test was performed using a simulated lower limb blood vessel model.- the angle of the mountain of common iliac artery of the simulated lower limb blood vessel model was set to r: 10mm - a factory-retained glidewire advantage was inserted alone into the left superficial femoral artery (sfa) via a contralateral approach.- the factory-retained glidewire advantage was inserted until the joint of it was located at the mountain of common iliac artery.- pushing and pulling forces were applied to the glidewire advantage.As a result, the section in the vicinity of joint was deflected toward the aorta side.- torque force was applied to the glidewire advantage.As a result, it was fractured in the vicinity of joint.The location of fracture was the same as that of the actual device, and the fractured section was not tapered and was flat.Electron microscopic inspection of the fractured surface obtained following results.- radial patterns were found on the top surface.- the condition of fractured surface was similar to that of the actual device.Based on the investigation result, as a possible cause of occurrence, it was likely that while the actual device was placed in the steep bifurcation of the common iliac artery, repeated pushing and pulling forces were applied, causing the section in the vicinity of joint to deflect toward the aorta side.Further torque force was then applied, causing metal fatigue to accumulate and leading to fracture.However, since details the condition when the actual device was used and the state of blood stream were unknown, it was not possible to clarify exactly when the event occurred and the extent of the forces applied on the actual device.Ashitaka factory has been making efforts in maintaining the quality of the product by performing following controls.- in the product assembling process, 100% visual inspection is performed to confirm that there is no anomaly such as an abrasion.- in the product assembling process, the outer diameter is measured on 100% basis to confirm that there is no localized anomaly in it.The ifu of this product includes the following warnings.- if any resistance is felt or if the tip's behavior and/or location seems improper, stop manipulating the glidewire advantage and/or the catheter and determine the cause by fluoroscopy.- continuing to manipulate or rotate the glidewire advantage or failure to exercise proper caution may result in bending, kinking, separation of the guide wire's tip, damage to the catheter, or damage to the vessel.Terumo medical corporation (tmc) (importer) registration no.2243441 is submitting this report on behalf of ashitaka factory of terumo corporation (manufacturer) registration no.9681834.
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