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US 12,702,800 B2Granted
Guide wire
AssigneeAsahi Intecc Co., Ltd.
InventorsKeisuke Ushida, Kenji Yoshida
Life of this patent
Estimating the term…
Abstract
A guide wire includes a first core shaft, a second core shaft, and a covering portion. The second core shaft is made of a material more susceptible to plastic deformation than a material of the first core shaft, and has a proximal end side joined to a distal end side of the first core shaft. The covering portion covers (i) a joint part between the first and second core shafts, and (ii) at least a part of the second core shaft on a distal end side of the joint part. The guide wire includes a first region where the second core shaft on a distal end side of the joint part is covered by the covering portion, and a second region adjacent to the first region, where the joint part is covered by the covering portion. The first region is more susceptible to plastic deformation than the second region.
Claims21
A guide wire comprising:
- a first core shaft made of a superelastic material and having a small-diameter portion, a decreasing-diameter portion in which an outer diameter of the first core shaft decreases in a distal direction, and a large-diameter portion, in this order from a distal end side of the first core shaft to a proximal end side of the first core shaft;
- a second core shaft made of a material more susceptible to plastic deformation than the superelastic material of the first core shaft and having a proximal end side laterally joined to the small-diameter portion of the first core shaft;
- a covering portion covering (i) a joint part between the first core shaft and the second core shaft and (ii) at least a part of the second core shaft that is on a distal end side of the joint part;
- a distal end-side fixation portion fixed to a distal end portion of the second core shaft and a distal end portion of the covering portion;
- and
- a coil body covering the second core shaft and the covering portion,
- wherein:
- the guide wire includes, from a distal end side of the guide wire toward a proximal end side of the guide wire:
- a first region where the second core shaft on a distal end side of the joint part is covered by the covering portion, and
- a second region adjacent to the first region, where the joint part is covered by the covering portion,
- the first region is more susceptible to plastic deformation than the second region;
- the covering portion is configured to be less susceptible to plastic deformation than the second core shaft and more susceptible to plastic deformation than the first core shaft, and
- the distal end portion of the covering portion is fixed to the second core shaft by the distal end-side fixation portion, and a proximal end portion of the covering portion is not fixed to the first core shaft.
10 more elements
A guide wire comprising:
- a first core shaft made of a superelastic material and having a small-diameter portion, a decreasing-diameter portion in which an outer diameter of the first core shaft decreases in a distal direction, and a large-diameter portion, in this order from a distal end side of the first core shaft to a proximal end side of the first core shaft;
- a second core shaft made of a material more susceptible to plastic deformation than the superelastic material of the first core shaft and having a proximal end side laterally joined to the small-diameter portion of the first core shaft;
- a covering portion covering (i) a joint part between the first core shaft and the second core shaft and (ii) at least a part of the second core shaft that is on a distal end side of the joint part;
- a distal end-side fixation portion fixed to a distal end portion of the second core shaft and a distal end portion of the covering portion;
- and
- a coil body covering the second core shaft and the covering portion,
- wherein:
- the guide wire includes, from a distal end side of the guide wire toward a proximal end side of the guide wire:
- a first region where the second core shaft on a distal end side of the joint part is covered by the covering portion, and
- a second region adjacent to the first region, where the joint part is covered by the covering portion,
- the first region is more susceptible to plastic deformation than the second region;
- in each section where the coil body covers the covering portion, the coil body contacts only the distal end-side fixation portion, and
- the distal end portion of the covering portion is fixed to the second core shaft by the distal end-side fixation portion, and a proximal end portion of the covering portion is not fixed to the first core shaft.
10 more elements
A guide wire comprising:
- a core shaft having a first core shaft and a second core shaft;
- the first core shaft having a small-diameter portion, a decreasing-diameter portion in which an outer diameter of the first core shaft decreases in a distal direction, and a large-diameter portion, in this order from a distal end side of the first core shaft to a proximal end side of the first core shaft;
- a joint part that contacts a distal end of the first core shaft and a proximal end of the second core shaft;
- a covering portion covering (i) the joint part and (ii) at least a part of the second core shaft that is on a distal end side of the joint part;
- a distal end-side fixation portion fixed to a distal end portion of the second core shaft and a distal end portion of the covering portion;
- and
- a coil body covering the second core shaft and the covering portion, wherein
- the guide wire includes, from a distal end side of the guide wire toward a proximal end side of the guide wire:
- a first region where the second core shaft on the distal end side of the joint part is covered by the covering portion, and
- a second region adjacent to the first region, where the joint part is covered by the covering portion,
- in each section where the coil body covers the covering portion, the coil body contacts only the distal end-side fixation portion, and
- the distal end portion of the covering portion is fixed to the second core shaft by the distal end-side fixation portion, and a proximal end portion of the covering portion is not fixed to the first core shaft.
9 more elements
Dependencies are inferred from the claim text.