Stent graft with a position adjustment portion
The stent graft ( 10 ) is to be placed in a tubular tissue and is equipped with: a skeleton portion ( 11 ); a tubular graft portion ( 12 ) having, in part of a tube wall, a side opening (opening 121 a of branch portion 121 ) that communicates with the lumen, the graft portion being provided along the skeleton portion; and a position adjustment portion ( 13 ) capable of adjusting the relative position of the side opening in the graft portion when the stent graft is placed in the tubular tissue.
1. A stent graft to be placed in a tubular tissue, comprising
a skeleton portion,
a tubular graft portion disposed along the skeleton portion, and having a side opening leading to a lumen in a part of a tube wall,
a position adjustment portion capable of adjusting a relative position of the side opening on the graft portion in a state where the stent graft is placed in the tubular tissue, wherein
the position adjustment portion has pleats formed along an axial direction of the stent graft on both sides of the side opening in a width direction orthogonal to the axial direction, and
the pleats are creases sterically folded such crest portions and trough portions are alternately formed, and the creases are formed along the axial direction.
2. The stent graft according to claim 1 , wherein the position adjustment portion is disposed around the side opening.
3. The stent graft according to claim 1 , wherein the side opening and the position adjustment portion are disposed in a region to which another stent graft different from the stent graft on the graft portion is connected.
4. The stent graft according to claim 1 , wherein
the tubular graft portion has a concave portion in which the part of the tube wall is recessed inward in a radial direction, and
the side opening and the position adjustment portion are disposed on the concave portion.
5. The stent graft according to claim 4 , comprising a deformation restriction portion for restricting deformation of the concave portion.
6. The stent graft according to claim 4 , wherein
the pleats are formed by folding the bottom face of the concave portion.
7. The stent graft according to claim 6 , comprising a branch portion that is formed so as to protrude outward in the radial direction from the bottom surface of the concave portion, wherein
the side opening is disposed at the tip of the branching portion.
8. The stent graft according to claim 5 , wherein
the deformation restriction portion is composed of wire rods spanned in the width direction of the concave portion.
9. The stent graft according to claim 8 , wherein
each of the wire rods is disposed on each side of the branch portion in the axial direction.
10. The stent graft according to claim 1 , wherein
the position adjustment portion can adjust the relative position of the side opening on the graft portion in the width direction.