Tubular therapeutic implement, tubular therapeutic implement set, and device for indwelling tubular therapeutic implement
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.
1. A tubular therapeutic implement comprising:
a frame portion having a plurality of frame pieces; and
a graft portion in a tubular shape disposed along the frame portion, wherein
a tube wall of the graft portion has a side opening communicating with an inner cavity of the graft portion,
the frame portion includes a first frame piece extending circumferentially while bending to form a complete ring shape and a second frame piece extending circumferentially while bending and being partially discontinuous to form a partial ring shape,
the first frame piece and the second frame piece are disposed apart in the axial direction of the graft portion,
the side opening is disposed in a specific portion of a full-length portion extending from one end to a different end through an entirety of the graft portion,
the specific portion is divided into first and second regions in a circumferential direction, the first region not having the second frame piece, the second region having the second 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.
2. The tubular therapeutic implement according to claim 1 , wherein
the specific portion has a circular cross-section,
the first region is present within a range of 90° or more to 180° or less out of a full 360° circumference of the circular cross-section of the specific portion, and
the second region is present in a range excluding the first region.
3. The tubular therapeutic implement according to claim 2 , wherein
the position of the side opening deviates from a middle position of the first region in the circumferential direction.
4. The tubular therapeutic implement according to claim 1 , wherein
a concave portion recessed inward in a radial direction is formed on the tube wall in the graft portion,
the side opening is disposed on a cylindrical branching portion protruding outward in the radial direction by a predetermined length from the concave portion, and
the concave portion corresponds to the first region.
5. The tubular therapeutic implement according to claim 4 , wherein the branching portion has an opening state-maintaining portion to maintain an opening state of the side opening when the graft portion is expanded.
6. A tubular therapeutic implement set comprising:
a first tubular therapeutic implement; and
a second tubular therapeutic implement in a tubular shape having openings on both ends, wherein
the first tubular therapeutic implement includes the tubular therapeutic implement according to claim 1 , and
the second tubular therapeutic implement is configured to be attachable to the side opening of the first tubular therapeutic implement.
7. A tubular therapeutic implement indwelling device to indwell a tubular therapeutic implement expandable in a radial direction, wherein
the tubular therapeutic implement includes the tubular therapeutic implement according to claim 1 .
8. The tubular therapeutic implement according to claim 1 , wherein the first region is a flat surface.
9. The tubular therapeutic implement according to claim 1 , wherein the first straight portion and the second straight portion are parallel.
10. The tubular therapeutic implement according to claim 4 , wherein the concave portion includes a flat bottom surface corresponding to the first region,
the first straight portion and the second straight portion are disposed along the outline of the flat bottom surface.