Tubular therapeutic implement, tubular therapeutic implement set, and device for indwelling tubular therapeutic implement
Inventors
Assignees
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Publication Number
US-11439496-B2
Publication Date
2022-09-13
Expiration Date
Abstract
Provided are a tubular therapeutic implement, a tubular therapeutic implement set, and a tubular therapeutic implement indwelling device, all of which enable appropriate indwelling at a branching portion in a tubular tissue. This stent graft 30 is provided with: a frame portion (32) having a plurality of frame pieces (321-325); and a tubular graft portion (33) which is provided along the frame portion, wherein the tube wall of the graft portion is provided with a lateral opening (through-hole 36 of a branching section 35) that is connected with an inner cavity of the graft portion, and when the region between one end and the other end of the graft portion is compartmented into a first region (P) that includes the lateral opening and a second region (Q) that dose not include the lateral opening, the frame pieces are not situated in the first region, but are in the second region.
Core Innovation
The invention relates to a tubular therapeutic implement comprising a frame portion and a graft portion in a tubular shape disposed along the frame portion. The tube wall of the graft portion has a side opening communicating with an inner cavity of the graft portion, and a specific portion extending from one end to a different end through an entirety of the graft portion includes the side opening and is divided into first and second regions in a circumferential direction.
The first region is defined so as not to have a particular frame-piece arrangement, while the second region includes it. A first frame piece extends circumferentially while bending to form a complete ring shape, and a second frame piece extends circumferentially while bending to form a partial ring shape; the first frame piece and the second frame piece are disposed apart in the axial direction, and the side opening is disposed in the first region.
The invention further provides a tubular therapeutic implement set and embodiments in which an opening state-maintaining portion is arranged around an opening edge of the side opening. The opening state-maintaining portion includes an annular opening state-maintaining portion such as a silicone rubber ring that maintains the side opening in an open state when the graft portion is expanded, and multiple structural variations for placement of the opening state-maintaining portion around the opening edge are described.
Claims Coverage
The independent claim is clm-00001. It sets out a tubular therapeutic implement with a tubular graft portion having a side opening to an inner cavity and a circumferentially divided region in which the presence/absence and placement of complete-ring and partial-ring frame pieces relative to the side opening are key inventive aspects. Dependent claims refine circumferential/angular constraints, circumferential offset of the side opening, structural formation on a concave/cylindrical branching portion, inclusion of an opening state-maintaining portion, and an implement set with an attachable branching component and an indwelling deployment device.
Circumferential region arrangement of complete and partial ring frame pieces around side opening
A tubular therapeutic implement where the side opening is disposed in a first region of a specific portion divided into first and second regions in a circumferential direction, the first region not having the second frame piece and the second region having the second frame piece, while the frame portion includes a first frame piece forming a complete ring shape and a second frame piece forming a partial ring shape disposed apart in an axial direction.
First region defined between straight portions of partial ring frame piece
The first region is a region sandwiched between a first straight portion at one end of the second frame piece and a second straight portion at the other end of the second frame piece, and the side opening is disposed in the first region.
Circumferential angular constraints for first and second regions
A tubular therapeutic implement in which, in a specific portion having a circular cross-section, the first region occupies at least 90° but less than 180° of the 360° circumference and the second region occupies a circumferential portion that remains excluding the first region.
Circumferential offset of side opening relative to middle position of first region
A tubular therapeutic implement in which the side opening is disposed such that, in a circumferential direction, a position of the side opening is offset from a middle position of the first region.
Concave portion and cylindrical branching portion positioning of side opening
A tubular therapeutic implement in which a concave portion is formed on a tube wall of the graft portion, the side opening is disposed on a cylindrical branching portion that extends outward in a radial direction from the concave portion by a predetermined length, and the concave portion is the first region.
Opening state-maintaining portion for maintaining side opening during expansion
A tubular therapeutic implement in which the branching portion includes an opening state-maintaining portion for keeping the side opening in an open state when the graft portion is expanded.
Two-component tubular therapeutic implement set with attachable branching blood vessel stent graft
A tubular therapeutic implement set in which a first tubular implement includes the features of the tubular therapeutic implement, and a second tubular implement is attachable to a side opening of the first tubular implement, the second having openings on both ends.
Across the independent claim and its refinements, the claim set focuses on positioning a side opening within a circumferentially defined first region that does not include a specified partial-ring frame piece, while a second region includes the second frame piece. Further dependent limitations specify angular/circumferential positioning of the side opening, structural context (concave portion and cylindrical branching portion), an opening state-maintaining portion to keep the opening open during expansion, and an implement set including a second attachable component.
Stated Advantages
Improves branching alignment/positional accuracy.
Prevents through-hole deformation and leakage.
Maintains through-hole openness during expansion.
Improves contact/adhesion.
Improves insertion ease.
Documented Applications
Deployment use in an indwelling device for deploying a radially expandable tubular implement.
Use of a tubular therapeutic implement set in which a first stent graft is coupled with a smaller branching blood vessel stent graft attachable to the side opening.
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