MEDICAL GUIDE WIRE

PROBLEM TO BE SOLVED: To solve a problem of a medical guide wire having a connection structure formed from three members, i.e., tubular connector, a first core wire, and a second core wire, which are connected together, in that in a case where, for example, the torsion rigidity of one member is lower than the respective torsion rigidities of members of both ends, torsion accumulates among the members and transmission of rotation to a leading end decreases significantly, in which case a technical object for improving transmission of rotation to the leading end still remains.SOLUTION: In a connection structure formed from three members, attentions were paid on the torsion rigidity of each member, and a torsion rigidity ratio among the members was considered. As a result, it was found that the torsion rigidity ratio having a constant relation is able to achieve a technical object for improving transmission of rotation to a leading end.SELECTED DRAWING: Figure 1 【課題】管状接続具と第１芯線と第２芯線とを接続した３つの部材から成る接続構造を有する医療用ガイドワイヤにおいて、例えば１つの部材のねじり剛性が両端部の部材のねじり剛性よりも低い場合には、各部材間でねじり溜まりが発生し、先端側への回転伝達性は大きく低下する。かかる場合に、先端側への回転伝達性を向上させる為の技術課題が存在している【解決手段】 ３つの部材から成る接続構造において、各部材のねじり剛性に着目して、各部材間のねじり剛性比を考察した結果、ねじり剛性比が一定の関係を有することにより、先端側への回転伝達性を向上させる技術課題を克服することができる。【選択図】図１