Stent graft with fixing elements and insertion system
Inventors
BARTHOLD, Franz-Peter • Centola, Marcos • Woerne, Christian
Assignees
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Publication Number
US-10722387-B2
Publication Date
2020-07-28
Expiration Date
Abstract
The present invention relates to a stent graft and to an insertion system for the stent graft according to the invention. The stent graft comprises a stent graft portion with a self-expanding stent having successive rings of meandering supports and a first prosthesis material secured on the rings. On at least one of its rings, the stent graft portion has two loop-shaped fixing elements which are attached via a common fixing area and which are attached to the supports of the rings in such a way that, due to the fact that they are guided in opposite directions around the hollow cylindrical body, the latter is compressible. Furthermore, the insertion system according to the invention also has a pin element with which the loop-shaped fixing elements can be threaded on.
Core Innovation
The invention relates to a self-expanding stent graft for inserting into a blood vessel of a patient. The stent graft includes a hollow cylindrical body with a blood side and a vessel side, and a first stent graft portion has a self-expanding stent composed of successive zig-zag rings of meandering supports in its longitudinal direction, with a first prosthesis material secured on the rings and connecting these on the vessel side of the hollow cylindrical body.
On each zig-zag ring, the first stent graft portion has two loops which are sewn to the meandering supports at only one fixing point that is shared by the two loops. The two loops are guided in opposite directions around the hollow cylindrical body so that the hollow cylindrical body is compressible along its entire length. The fixing point is located at the same position for each zig-zag ring.
The invention further relates to an insertion system for inserting the self-expanding stent graft into a blood vessel. The insertion system includes a stent graft with the hollow cylindrical body, the first stent graft portion, and the loops with a shared fixing point on each zig-zag ring, and at least one pin element designed to be threaded through and temporarily fix the loops compressing the stent graft.
Additional embodiments refine the insertion system by providing features for releasing the temporarily fixed loops and for enabling compression and guiding. The system is configured so that the compressed stent graft can be released by freeing the loops that have kept the stent graft compressed, and further refinements include several pin elements of different length for releasing different stent graft portions, a sleeve tube arranged over the at least one pin elements, and a handle with an internal roller configured for guiding the pin element with its proximal end.
Claims Coverage
The partial content includes two independent claims. Across these independent claims, there are two main groups of inventive features: the self-expanding stent graft structure with successive zig-zag meandering-support rings and shared fixing-point loops, and the insertion system using pin elements that thread through and temporarily fix the loops to compress the stent graft for insertion.
Self-expanding stent graft with successive zig-zag meandering-support rings and shared fixing-point loops
A stent graft for inserting into a blood vessel has a hollow cylindrical body with a blood side and a vessel side, wherein a first stent graft portion has a self-expanding stent composed of successive zig-zag rings of meandering supports in its longitudinal direction with a first prosthesis material secured on the rings connecting these on the vessel side. On each zig-zag ring, two loops are sewn to the meandering supports at only one shared fixing point such that, due to guidance in opposite directions around the hollow cylindrical body, the hollow cylindrical body is compressible along its entire length, with the fixing point located at the same position for each zig-zag ring.
Insertion system using pin elements threaded through and temporarily fixing loops for compressing the stent graft
An insertion system for inserting a self-expanding stent graft into a blood vessel includes a stent graft with a hollow cylindrical body having a blood side and a vessel side, with a first stent graft portion as successive zig-zag rings of meandering supports and two loops sewn to each zig-zag ring at only one shared fixing point such that the hollow cylindrical body is compressible along its entire length. The insertion system includes at least one pin element designed to be threaded through and temporarily fix the loops compressing the stent graft, the pin element having a proximal end, a distal end, and a middle portion between these ends.
The independent claims define a stent-graft construction enabling compressibility along the entire length via two loops sewn at a single shared fixing point on each zig-zag ring of meandering supports, and an insertion system that compresses the stent graft by threading at least one pin element through and temporarily fixing those loops.
Stated Advantages
Enables the hollow cylindrical body to be compressible along its entire length.
Documented Applications
Insertion into a blood vessel of a patient.
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