Guidewire
AssigneeFMD Co., Ltd.
InventorsTsuyoshi TERASHI, Hironori KAWASAKI
Life of this patent
Estimating the term…
Abstract
A guidewire includes a core wire, a resin sleeve, a front-end-side coil, a back-end-side coil, and an inside coil. The front-end-side coil includes a front end portion and a back end portion, each of which is fixed to a distal-end-side small-diameter portion of the core wire with solder. The back-end-side coil includes a solder-impregnated back end portion and a solder-unimpregnated front end portion. The solder-impregnated back end portion has an inner space impregnated with solder for fixing the back-end-side coil to the distal-end-side small-diameter portion of the core wire. The solder-unimpregnated front end portion has an inner space that is not impregnated with solder.
Claims7
A guidewire comprising:
- a core wire;
- a resin sleeve disposed such that the resin sleeve is rotatable around a distal-end-side small-diameter portion of the core wire;
- a front-end-side coil formed of a compression coil spring having an outer diameter substantially equal to an outer diameter of the resin sleeve, the front-end-side coil being disposed on a front-end side of the resin sleeve so as to surround the distal-end-side small-diameter portion of the core wire and having a back end in contact with a front end surface of the resin sleeve;
- and
- a back-end-side coil formed of a compression coil spring having an outer diameter substantially equal to the outer diameter of the resin sleeve, the back-end-side coil being disposed on a back-end side of the resin sleeve so as to surround the distal-end-side small-diameter portion of the core wire and having a front end in contact with a back end surface of the resin sleeve,
- wherein the front-end-side coil includes a front end portion and a back end portion, each of which is fixed to the distal-end-side small-diameter portion of the core wire with solder, and
- wherein the back-end-side coil includes a solder-impregnated back end portion and a solder-unimpregnated front end portion, the solder-impregnated back end portion having an inner space impregnated with solder for fixing the back-end-side coil to the distal-end-side small-diameter portion of the core wire, the solder-unimpregnated front end portion having an inner space that is not impregnated with solder.
Dependencies are inferred from the claim text.