Catheter
AssigneeAsahi Intecc Co., Ltd.
InventorsTeppei Kuboki, Keiichi Fujino
Life of this patent
Estimating the term…
Abstract
A catheter, including: a hollow shaft having a distal end that includes a first section extending substantially linearly and a second section on a distal end side of the first section. The second section includes a first curved region and a second curved region, less rigid than the first curved region, on the more distal end side than the first curved region. A virtual plane on the axis of the hollow shaft forms a boundary, and spaces on both sides of the virtual plane define a first area and a second area. The first curved region and the distal end of the catheter are in the first area. The second curved portion is in the second area. A distance from the distal end of the catheter to the virtual plane is larger than a distance from the first curved portion to the virtual plane.
Claims16
A catheter, comprising:
- a hollow shaft, wherein
- a distal end portion of the hollow shaft includes a first section extending substantially linearly, a second section at a distal end side of the first section and including a first curved region, and a third section at a distal end side of the second section and including a second curved region,
- a rigidity of the second section is larger than a rigidity of the third section, with the rigidity of the third section being 1, a ratio of rigidity among the third section, the second section, and the first section is 1:10 to 20:30 to 300,
- a virtual plane set along an axis of the first section, a first space on a first side with respect to the virtual plane being a first area, and a second space on a second side being a second area,
- the first curved region and a distal tip of the catheter are in the first area,
- the second curved region is in the second area,
- a distance from the distal tip of the catheter to the virtual plane is larger than a distance from a vertex of the first curved region to the virtual plane, and
- a maximal curvature of the second curved region is larger than a maximum curvature of the first curved region.
A catheter, comprising:
- a hollow shaft, wherein
- a distal end portion of the hollow shaft includes a first section extending substantially linearly, a second section at a distal end side of the first section and including a first curved region, and a third section at a distal end side of the second section and including a second curved region,
- a rigidity of the second section is larger than a rigidity of the third section,
- a virtual plane set along an axis of the first section, a first space on a first side with respect to the virtual plane being a first area, and a second space on a second side being a second area,
- the first curved region and a distal tip of the catheter are in the first area,
- the second curved region is in the second area,
- a distance from the distal tip of the catheter to the virtual plane is larger than a distance from a vertex of the first curved region to the virtual plane,
- a maximal curvature of the second curved region is larger than a maximum curvature of the first curved region, and
- with the distance from the vertex of the first curved region to the virtual plane being 1, a ratio of distances among (a) the distance from the vertex of the first curved region to the virtual plane, (b) a distance from a vertex of the second curved region to the virtual plane, and (c) the distance from the distal tip of the catheter to the virtual plane is 1:5 to 10:6 to 16.
Dependencies are inferred from the claim text.