Patent ID: 8652119
Filing Date: 2014-02-18
Classification: A61M

Abstract:
1. A guidewire comprising: a core shaft; an outer coil having a tapered coil portion constituted by at least one strand wound to decrease an outer diameter toward a front end of the core shaft and surrounding a front side portion of the core shaft; an inner coil constituted by at least one strand wound, which surrounds the front side portion of the core shaft entirely within the outer coil, and whose outer diameter on a front side, arranged on a front side of the tapered coil portion, is smaller than an outer diameter on a rear side, wherein a gap is disposed between the inner coil and the outer coil and the gap increases towards the rear end of the core shaft; a front end joint joining 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 joining a rear end of the outer coil to the core shaft; and an inner rear end joint joining a rear end of the inner coil to the core shaft further on a front side than the outer rear end joint.