Patent ID: 8585612
Filing Date: 2013-11-19
Classification: A61M

Abstract:
1. A guidewire, comprising: a core shaft; an outer coil that surrounds a front side portion of the core shaft and has a taper coil portion formed by winding at least one strand such that an outer diameter of the taper coil portion gradually decreases toward a front end of the core shaft; an inner coil that surrounds the front side portion of the core shaft inside the outer coil; a tip joint that joins a front end of the outer coil and a front end of the inner coil to the front end of the core shaft; an outer rear end joint that joins a rear end of the outer coil to the core shaft; and an inner rear end joint that joins a rear end of the inner coil only to the core shaft on a front side from a position where the taper coil portion of the outer coil has a maximal outer diameter, wherein the maximal diameter of the taper portion is less than a maximal diameter of the outer coil.