Implantable prosthetic valves with woven valve cusps

Patent metadata

Field	Value
Publication number	US-2025152342-A1
Application number	US-202218723047-A
Country	US
Kind code	A1
Filing date	Dec 14, 2022
Priority date	Dec 23, 2021
Publication date	May 15, 2025
Grant date	—

Abstract

The present invention relates to a valve prosthesis for implantation in the human or animal body comprising at least one valve stent with an annular, lower valve base, at least two commissural struts extending from the valve base and valve cusps arranged on the valve stent, wherein the valve cusps are formed from one or more woven ribbon fabrics with approximately tangential warp threads and approximately axial weft threads with respect to the axis of symmetry of the annular flap base, wherein at least the ribbon fabric weft threads at the end of the ribbon fabric opposite the valve base reverse their orientation and form a free cusp edge.

First claim

1 . A valve prosthesis for implantation in a human or animal body, comprising:
at least one valve stent ( 1 ) with an annular, lower valve base ( 3 ); at least two commissural struts ( 4 ) extending from the annular, lower valve base ( 3 ); and valve cusps ( 2 ) arranged on the valve stent,
characterized in that the valve cusps ( 2 ) consist of one or more woven ribbon fabrics with, in relation to an axis of symmetry ( 8 ) of the annular, lower valve base ( 3 ), approximately tangential warp threads ( 5 ) and approximately axial weft threads ( 6 ), wherein at least the axial weft threads ( 6 ) are located at an end of the ribbon fabric opposite the annular lower valve base to reverse their orientation and form a free cusp edge ( 7 ).

2 . The valve prosthesis according to claim 1 , wherein the one or more ribbon fabric are arranged parallel to the axis of symmetry ( 8 ) of the valve stent ( 1 ) and the warp threads ( 5 ) of the one or more ribbon fabrics are aligned approximately radially in an upper region of the commissural struts ( 4 ).

3 . The valve prosthesis according to claim 1 , wherein the valve stent ( 1 ) has three commissural struts ( 4 ) and the valve cusps ( 2 ) are formed from three ribbon fabrics arranged next to each other.

4 . The valve prosthesis according to claim 1 , wherein the valve stent ( 1 ) has two commissural struts ( 4 ) and the valve cusps ( 2 ) are formed from two ribbon fabrics arranged next to each other.

5 . The valve prosthesis according to claim 1 , wherein the valve cusps ( 2 ) at least partially comprise one or more further fabric layers ( 10 ) in a region of arrangement surfaces of the one or more ribbon fabrics relative to one another.

6 . The valve prosthesis according to claim 1 , wherein the valve stent ( 1 ) comprises a mechanical clamping device ( 9 ) in the region of the commissural struts ( 4 ) for mechanically fixing the one or more ribbon fabrics to each other and to the valve stent ( 1 ).

7 . The valve prosthesis according to claim 1 , wherein the one or more ribbon fabrics are arranged only on an outer or an inner side of the valve stent ( 1 ), wherein the one or more ribbon fabrics does not contact an the entire surface of the valve stent ( 1 ).

8 . The valve prosthesis according to claim 1 , wherein the annular lower valve base ( 3 ) comprises further anchoring structures ( 12 ) all around, wherein the one or more ribbon fabrics are arranged on the annular, lower valve base ( 3 ) at least in a region of the anchoring structures ( 12 ).

9 . The valve prosthesis according to claim 1 , wherein the one or more ribbon fabrics have a weft yarn density of greater than or equal to 20 weft yarns/cm and less than or equal to 90 weft yarns/cm and a warp yarn density of greater than or equal to 60 warp yarns/cm and less than or equal to 180 warp yarns/cm.

10 . The valve prosthesis according to claim 1 , wherein the warp as well as the weft yarns of the one or more ribbon fabrics consist of a multifilament yarn, wherein the multifilament yarn consists of greater than or equal to 10 and less than or equal to 30 individual filaments and the individual filaments have a fineness of greater than or equal to 20 dtex and less than or equal to 90 dtex.

11 . The valve prosthesis according to claim 1 , wherein the warp and weft yarns of the one or more ribbon fabrics consist of different multifilament yarns, wherein a maximum ten-sile force according to DIN EN ISO 2062 of the multifilament yarn of the warp yarns is greater than or equal to 10% and less than or equal to 60% higher than that of the weft yarns and a maximum tensile force elongation according to DIN EN ISO 2062 of the multifilament yarn of the weft yarns is greater than or equal to 5% and less than or equal to 50% higher than that of the warp yarns.

12 . The valve prosthesis according to claim 1 , wherein the individual filaments of the weft yarns are twisted, wherein the twisting is greater than or equal to 10 turns/m and less than or equal to 600 turns/m.

Assignees

• Rwth Aachen

Inventors

• Schmitz-Rode Thomas

Classifications

• A61F2250/0028

  differing in fibre orientations · CPC title

• A61F2250/0018

  differing in elasticity, stiffness or compressibility · CPC title

• A61F2250/0017

  differing in yarn density · CPC title

• A61F2220/0025

  Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements · CPC title

• D10B2401/063

  high strength · CPC title