Stent graft with a position adjustment portion
Inventors
Shirahama, Noriaki • Yoshimori, Takashi
Assignees
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Publication Number
US-11844681-B2
Publication Date
2023-12-19
Expiration Date
Abstract
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 121a 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.
Core Innovation
The invention provides a stent graft for placement in a tubular tissue including a skeleton portion and a tubular graft portion disposed along the skeleton portion. The tubular graft portion has a side opening leading to a lumen in a part of a tube wall, and includes a branch portion with the side opening on a branch portion.
A position adjustment portion is provided to adjust a relative position of the side opening on the graft portion in a state where the stent graft is placed in the tubular tissue. While the stent graft is placed in a main vessel, the position adjustment portion deforms so that the side opening is laterally displaced and aligned with a branch vessel opening for connection to a second stent graft.
The position adjustment portion is implemented with 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. The pleats are creases sterically folded such that crest portions and trough portions are alternately formed, and the creases are formed along the axial direction.
The side opening and the position adjustment portion are housed in a concave recessed region, and a deformation restriction portion using wire rods spanned in the concave width maintains concave flatness. This is intended to prevent unintended radial bulging and misalignment of the side opening during deformation to enable opening alignment.
Claims Coverage
The independent claim contains 5 main inventive elements. Dependent claims further define localized placement around the side opening, concave recessed geometry, and deformation restriction using wire rods.
Stent graft with skeleton and tubular graft portion having a side opening
A stent graft to be placed in a tubular tissue comprises a skeleton portion and a tubular graft portion disposed along the skeleton portion, wherein the tubular graft portion has a side opening leading to a lumen in a part of a tube wall.
Position adjustment portion for relative side-opening position after placement
The stent graft includes 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.
Axial-direction pleats on both sides of the side opening in width direction orthogonal to axial direction
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.
Sterically folded creases with alternating crest and trough formed along axial direction
The pleats are creases sterically folded such that crest portions and trough portions are alternately formed, and the creases are formed along the axial direction.
Concave recessed geometry locating side opening and position adjustment portion
The side opening and the position adjustment portion are located on a concave recessed section of the tubular graft portion.
Deformation restriction portion using wire rods
A deformation restriction portion is made of wire rods spanned in the concave width.
Overall, the claim coverage centers on a side-opening stent graft with a placement-state position adjustment portion, with further dependent-defined concave/recessed localization and deformation restriction via wire rods.
Stated Advantages
Prevents unintended radial bulging and misalignment of the side opening during deformation, enabling opening alignment.
Documented Applications
Branch-vessel-compatible stent graft placement in a main vessel with alignment of a side opening to a branch vessel opening for connection to a second stent graft.
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