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Assembly of the medical guide wire, and medical guide wire and the microcatheter or balloon catheter and the guiding catheter,
Assembly of the medical guide wire, and medical guide wire and the microcatheter or balloon catheter and the guiding catheter,
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机译：医用导丝，医用导丝以及微导管或球囊导管和导尿管的组装，
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摘要
PROBLEM TO BE SOLVED: To solve such problems that a coil body including a small-diameter distal end and a large-diameter rear end is liable to be formed into a so-called narrow coil body with high rigidity, because the spring constant of the coil body is inversely relates to a coil mean diameter and the spring constant of a small-diameter coil body increases by an outer-diameter difference (similar to a mean-diameter difference of the coil), and that, in such a case, the characteristics of fatigue resistance should be improved with respect to the torsional rotation.;SOLUTION: This medical guide wire includes the coil body increasing the number of windings (reducing the coil pitch) without changing the longitudinal length of the small-diameter coil body for suppressing the increase in the spring constant caused by the outer-diameter difference of the coil body and improving the characteristics of fatigue resistance to the repetitive torsional rotation based on a definite relationship between the spring index and a stress correction factor.;COPYRIGHT: (C)2012,JPO&INPIT
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