Stent and living organ dilator
First Claim
1. A stent configured to closely contact tissue in vivo by being deformed when set indwelling in vivo, the stent comprising:
- a plurality of linear components configured to deform and exhibit a force for maintaining dilation when the stent is set indwelling in vivo, the linear components comprising a plurality of non-biodegradable metallic linear components and a plurality of biodegradable material-made linear components, the biodegradable material-made linear components being bonded to the non-biodegradable metallic linear components;
both the non-biodegradable metallic linear components and the biodegradable material-made linear components contributing to the stent exhibiting the force for maintaining the dilation when the stent is left indwelling in vivo; and
after a predetermined period of time following the stent being left indwelling in vivo, biodegradation of the biodegradable material-made linear components proceeds so that the force for maintaining the dilation is lowered; and
wherein the non-biodegradable metallic linear components have at least one joint part which protrudes from a side portion of a rectilinear portion of the non-biodegradable metallic liner components, and the biodegradable material-made linear components envelop only a free end of the at least one joint part.
1 Assignment
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Accused Products
Abstract
A stent, composed of linear components, comes into close contact with a tissue in vivo upon being deformed when set indwelling in vivo. The stent has linear components which are deformed to exhibit a force for maintaining dilation when the stent is set indwelling in vivo. The linear components deformed when the stent is set indwelling in vivo are composed of non-biodegradable metallic linear components and a plurality of biodegradable material-made linear components which are bonded to the non-biodegradable metallic linear components. Furthermore, when set indwelling in vivo, the stent exhibits the force for maintaining the dilation owing to both the non-biodegradable metallic linear components and the biodegradable material-made linear components. After a predetermined period of time, biodegradation of the biodegradable material-made linear components proceeds, which results in a lowering of the force for maintaining the dilation.
23 Citations
17 Claims
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1. A stent configured to closely contact tissue in vivo by being deformed when set indwelling in vivo, the stent comprising:
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a plurality of linear components configured to deform and exhibit a force for maintaining dilation when the stent is set indwelling in vivo, the linear components comprising a plurality of non-biodegradable metallic linear components and a plurality of biodegradable material-made linear components, the biodegradable material-made linear components being bonded to the non-biodegradable metallic linear components; both the non-biodegradable metallic linear components and the biodegradable material-made linear components contributing to the stent exhibiting the force for maintaining the dilation when the stent is left indwelling in vivo; and after a predetermined period of time following the stent being left indwelling in vivo, biodegradation of the biodegradable material-made linear components proceeds so that the force for maintaining the dilation is lowered; and wherein the non-biodegradable metallic linear components have at least one joint part which protrudes from a side portion of a rectilinear portion of the non-biodegradable metallic liner components, and the biodegradable material-made linear components envelop only a free end of the at least one joint part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A stent configured to closely contact tissue in vivo by being deformed when set indwelling in vivo, the stent comprising:
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a plurality of linear components configured to deform and exhibit a force for maintaining dilation when the stent is set indwelling in vivo, the linear components comprising a plurality of non-biodegradable metallic linear components and a plurality of biodegradable material-made linear components, the biodegradable material-made linear components being bonded to the non-biodegradable metallic linear components; both the non-biodegradable metallic linear components and the biodegradable material-made linear components contributing to the stent exhibiting the force for maintaining the dilation when the stent is left indwelling in vivo; and after a predetermined period of time following the stent being left indwelling in vivo, biodegradation of the biodegradable material-made linear components proceeds so that the force for maintaining the dilation is lowered, wherein the biodegradable material-made linear components are connected to the metallic linear components at respective joints, the biodegradable material-made liner components crossing the non-biodegradable metallic linear components such that they intersect each other at the joint, the biodegradable material-made linear components covering an outer surface and an inner surface of the metallic linear component at the joint; and wherein the non-biodegradable metallic linear components include zigzag shaped portions and the biodegradable material-made linear components include zigzag shaped portions, the non-biodegradable metallic linear components comprising a plurality of metallic linear spiral members extending in a spiral manner in relation to an axial direction of the stent, the plurality of metallic linear spiral members being interconnected by the biodegradable material-made linear components. - View Dependent Claims (16, 17)
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Specification