GUIDEWIRE
First Claim
Patent Images
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 in 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;
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.
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Accused Products
Abstract
A guidewire having high rotational torque transmissibility and high pushing torque transmissibility and having favorable restorability is provided. The guidewire has 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 a core shaft and an inner coil arranged inside the outer coil. An outer diameter on a front side of the inner coil arranged on a front side of the tapered coil portion is smaller than an outer diameter on a rear side of the inner coil.
19 Citations
11 Claims
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1. A guidewire comprising:
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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 in 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; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification