Self-expanding vascular prosthesis
Inventors
Szopinski, Piotr • Woerne, Christian • Walther, Michael
Assignees
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Publication Number
US-10617515-B2
Publication Date
2020-04-14
Expiration Date
Abstract
The present invention relates to a self-expanding vascular prosthesis for implantation in a blood vessel of a patient, comprising a hollow-cylindrical base body, a vascular prosthetic trunk having a first and a second opening, and at least two vascular prosthesis side branches which are outgoing from the vascular prosthetic trunk and are formed integrally with the vascular prosthetic trunk. The vascular prosthetic trunk has sections which comprise a tapered peripheral part, in which the vascular prosthesis side branches are mounted.
Core Innovation
A self-expanding vascular prosthesis for implantation in a blood vessel includes a vascular prosthesis trunk having a hollow-cylindrical main body with a first and a second opening. The trunk is formed with a first proximal vascular prosthesis trunk longitudinal portion comprising the first opening, and a second distal vascular prosthesis trunk longitudinal portion comprising the second opening. The prosthesis further includes at least two vascular prosthesis side branches which branch off from the vascular prosthesis trunk and are formed integrally with the vascular prosthesis trunk.
The trunk includes at least two central vascular prosthesis trunk longitudinal portions arranged between the first and second trunk longitudinal portions and arranged one behind the other. The first and second trunk longitudinal portions each have constant diameters d1 and d2 along their respective longitudinal direction and are arranged concentrically with respect to each other, with d1 greater than d2. Each of the central trunk longitudinal portions tapers toward the second trunk longitudinal portion only in one circumferential part, and the respectively tapering circumferential parts of the first and second central trunk longitudinal portions are arranged offset in the circumferential direction.
At least one side branch in the first central trunk longitudinal portion and at least one second side branch in the second central trunk longitudinal portion are arranged in the respectively tapering circumferential part. The prosthesis is described as a one-piece self-expanding hollow-cylindrical trunk with integrally formed side branches positioned within the offset taper sectors.
Construction aspects described include a prosthesis material with meandering Nitinol stent rings connected via prosthesis material, and oval openings connect the branches to the trunk, with radiopaque markers arranged around openings and near the distal opening and near the branch emergence.
Claims Coverage
The claims coverage is centered on a single independent claim directed to a one-piece self-expanding vascular prosthesis trunk with integrally formed side branches, where the trunk transitions are limited to one circumferential taper sector that is circumferentially offset between central longitudinal portions. The independent claim includes constant-diameter proximal and distal longitudinal portions arranged concentrically, with d1 greater than d2, and requires side branches positioned within the tapering circumferential parts of the corresponding central portions. Dependent claims further refine structural details such as radiopaque markers and oval openings, and add anatomical and deployment-related configurations.
Integrally formed side branches from a hollow-cylindrical trunk
A self-expanding vascular prosthesis for implantation includes a vascular prosthesis trunk having a hollow-cylindrical main body with a first and a second opening, and at least two vascular prosthesis side branches which branch off from the vascular prosthesis trunk and are formed integrally with the vascular prosthesis trunk.
Concentrically arranged constant-diameter proximal and distal portions
The first and second vascular prosthesis trunk longitudinal portions each have a constant diameter d1, d2 along their respective longitudinal direction and are arranged concentrically with respect to each other, wherein the diameter d1 is greater than the diameter d2.
Single-sector tapering of central trunk portions with circumferential offset
The first and second central vascular prosthesis trunk longitudinal portions each taper toward the second vascular prosthesis trunk longitudinal portion only in one circumferential part, wherein the respectively tapering circumferential parts of the first and second central vascular prosthesis trunk longitudinal portions are arranged in a manner offset in relation to each other in the circumferential direction.
Side branches positioned in the offset tapering circumferential parts
At least one vascular prosthesis side branch in the first central vascular prosthesis trunk longitudinal portion and at least one second vascular prosthesis side branch in the second central vascular prosthesis trunk longitudinal portion are arranged in the respectively tapering circumferential part.
Across the independent claim, inventive coverage focuses on a hollow-cylindrical self-expanding trunk with concentrically arranged constant-diameter proximal and distal portions, where each central longitudinal portion tapers only in a single circumferential sector. The taper sectors are circumferentially offset between the central portions, and the integrally formed side branches are arranged within the respective tapering circumferential sectors.
Stated Advantages
Reduced compression/loading near off-branching regions.
Documented Applications
Treatment of thoraco-abdominal aneurysm, where side branches dock and enable deployment of additional stents or stent grafts to supply visceral arteries.
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