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D4: lot number: requested, unknown.D4: expiration date: unknown due to unknown lot number.D6a: implanted date: device was not implanted.D6b: explanted date: device was not explanted.H4: device manufacture date: unknown due to unknown lot number.Since the actual sample was not returned, detailed investigation could not be performed, and the cause of occurrence could not be clarified.Since the involved lot number was unknown, the investigation could not be performed.Since the involved lot number was unknown, the investigation could not be performed on past history files.Regarding the involved product code, there have been no events caused due to the manufacturing process in the past three years (december 2020 - november 2023).In order to clarify the cause of occurrence, we would like to ask for your cooperation in obtaining the actual sample in the future.Ashitaka factory has been making efforts in maintaining the quality of the product by performing following control.In the product assembling process, 100% visual inspection is performed to assure that there is no deformation in the coil.After the product assembling process, the outer diameter is measured on 100% basis to assure that there is no anomaly on it.After the product assembling process, the tip abutting resistance is measured on 100% basis to assure that there is no anomaly in the tip load.The dispensing amount of hydrophilic coating solution and the stirring time are controlled so that the coating amount and condition are managed to be uniform.In the shipping inspection, the tip sliding resistance value is measured per lot number basis to assure that there is no anomaly in its lubricity.The instructions for use (ifu) of this product includes the following statement: "if any resistance to the runthrough ns or the dilatation catheter is felt during manipulation or if the shape, behaviour or position of the guide wire's tip seems improper (e.G., the tip is trapped due to vessel spasm or some other cause, or the tip is folded), stop manipulating the guide wire (and the catheter), determine the cause carefully by fluoroscopy and take suitable remedial actions.Next, remove the guide wire slowly, without turning, and exchange it for a new one.Continuing guide wire or catheter manipulation in the said situations may result in damage to the vessel, damage to or separation of the guide wire's tip, and/or damage to the dilatation catheter." for the importer report please see (b)(4).(b)(4) (importer) registration no.(b)(4) is submitting this report on behalf of ashitaka factory of terumo corporation (manufacturer) registration no.9681834.
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