< Topic >It is something which discloses the technology regarding the medical application guide wire which consists of the coil spring body which possesses the stretch breaking strength of the high intensity with the correlation with junction configuration and the mechanical strength property of the wire rod which are welding junction circles of the coil spring body consisting of the single wire rod of the radiation non- transmitted wire rod and the radiation transmitted wire rod as clear. SolutionsIt is something which offers the medical application guide wire which in the radiation non- transmitted wire rod and the radiation transmitted wire rod of reduction diameter wire drawing process front and back of the single wire rod provides difference in the stretch breaking strength of the fixed range, obtaining the stretch breaking strength of the high intensity and the coil spring body which has the joint of the high intensity furthermore in the middle of reduction diameter wire drawing processing by providing the transition region where stretch breaking strength is reversed, improves resistance iteration rotary operating characteristics. < Choice figure > Drawing 1【課題】放射線不透過線材と放射線透過線材の単一の線材から成るコイルスプリング体の溶着接合部内の接合形態と、線材の機械的強度特性との相関関係を明確にして、高強度の引張破断強度を有するコイルスプリング体から成る医療用ガイドワイヤに関する技術を開示するものである。【解決手段】単一の線材の縮径伸線加工前後の放射線不透過線材と放射線透過線材に一定範囲の引張破断強度に差を設け、さらに縮径伸線加工の途中で引張破断強度が逆転する遷移領域を設けることにより、高強度の引張破断強度と高強度の接合部を備えたコイルスプリング体を得て、耐繰り返し回転操作特性を向上させた医療用ガイドワイヤを提供するものである。【選択図】 図1
