CN217548312U

CN217548312U - Valve stent, valve prosthesis and valve prosthesis system

Info

Publication number: CN217548312U
Application number: CN202221116343.0U
Authority: CN
Inventors: 邱尧; 张婧; 刘世红; 陈国明
Original assignee: Shanghai Microport Cardioflow Medtech Co Ltd
Current assignee: Shanghai Microport Cardioflow Medtech Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-10-11
Anticipated expiration: 2032-04-29

Abstract

The utility model provides a valve support, a valve prosthesis and a valve prosthesis system, wherein the valve support comprises an inflow channel section, an outflow channel section and a hanging lug section which are arranged in sequence along the axial direction of the valve support; the outflow tract section has a leaflet connecting portion for connecting leaflets; the hangers section includes hangers, the hangers set up at least in the edge the axial both sides of leaflet connecting portion, perhaps, the hangers set up at least in the edge the axial extension's that leaflet connecting portion belonged to the position. So for the hangers section can guarantee that the atress of leaflet connecting portion is even, and then improves the whole atress of valve support even, thereby improves the valve support and presses the homogeneity that grips and get into conveying system and the precision when the release.

Description

Valve stent, valve prosthesis and valve prosthesis system

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a valve support, valve prosthesis and valve prosthesis system.

Background

With the increase of human life and the aging of population, the incidence rate of heart valve diseases is higher and higher. According to literature statistics, valvular disease exists in 2-7% of the elderly aged over 65 years old. In the European and American countries, valvular diseases are third after coronary heart diseases and hypertension. Prosthetic Heart valves (Heart Valve prosthesis) are artificial organs that can be implanted in the Heart to replace Heart valves (including aortic, pulmonary, tricuspid, and mitral valves), allow unidirectional blood flow, and function as native Heart valves. When the heart valve is severely diseased and cannot be restored or improved by valve separation or repair surgery, a prosthetic heart valve replacement procedure must be used. Interventional heart valve replacement is the placement of a valve prosthesis at the site of a lesion by a minimally invasive procedure, controlled by a delivery system.

At present, due to the complexity of the native structure of the valve, the design difficulty of the artificial valve stent is very high, and when the valve stent is pressed into a conveying system, the pressing and holding form of the valve stent is uneven; when the valve stent is released, the accuracy of the release of the valve stent is not high. Taking the mitral valve as an example, this is shown in: 1. diseased mitral valve annuluses are generally larger in size, requiring a larger sized structure of the valve holder, which can result in greater challenges in the crimping and release of the valve used for mitral valve replacement. It is more difficult for the mitral valve stent to achieve a more uniform crimped configuration when crimped into the sheath. When releasing, the annulus of the mitral valve is at the junction of the chambers of the left atrium and left ventricle, and the overall height is low, so the requirement for the release accuracy is higher. 2. The structure around the mitral valve is complex, and there are many subvalvular tissue structures of the mitral valve in the left ventricle, such as papillary muscles, chordae tendinae, left ventricular outflow tract, etc. If the stent used in the mitral valve extends too far into the left ventricle, damage to these tissue structures or blockage of the left ventricular outflow tract may occur.

Therefore, it is a desirable problem to develop a valve stent, a valve prosthesis and a valve prosthesis system that can solve at least one of the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a valve support, valve prosthesis and valve prosthesis system to solve at present in the valve support, the form is inhomogeneous when the valve support is pressed and is held, and the problem that the accurate nature of valve support release is not high.

In order to solve the technical problem, the utility model provides a valve stent, which comprises an inflow channel section, an outflow channel section and a suspension loop section which are arranged in sequence along the axial direction of the valve stent; the outflow tract section has a leaflet connecting portion for connecting leaflets; the hangers section includes hangers, the hangers set up at least in the edge the axial both sides of leaflet connecting portion, perhaps, the hangers set up at least in the edge the axial extension's that leaflet connecting portion belonged to the position.

Optionally, the number of the hangers is double of the number of the leaflet connecting portions, and the hangers are at least arranged on two axially symmetrical sides of the leaflet connecting portions.

Optionally, the number of the hangers is a single multiple of the number of the leaflet connecting portions, and the hangers are disposed at least at positions extending in the axial direction of the leaflet connecting portions.

Optionally, the number of the hangers is non-odd times and non-even times of the number of the leaflet connecting portions, a part of the hangers are disposed at positions extending in the axial direction of the leaflet connecting portions, and the rest of the hangers are disposed at two axially symmetrical sides of the leaflet connecting portions.

Optionally, when the hangers are arranged on two axially symmetrical sides along the leaflet connecting portion, the hangers on the two symmetrical sides form hanger assemblies, and the hanger assemblies are uniformly distributed along the circumferential direction of the valve stent; or when the hanging lugs are arranged at the position extending along the axial direction of the valve leaflet connecting part, the hanging lugs are uniformly distributed along the circumferential direction of the valve support.

Optionally, the outflow end of the outflow tract section is provided with a row of grid frames distributed along the circumferential direction of the valve support, the grid frames are arranged in a concave hexagon, and concave angles of the concave hexagon are concave inwards towards the direction of the inflow end along the axial direction of the valve support.

Optionally, the outflow tract section further has a support rod extending along the axial direction of the valve stent, and the hangers are connected with the support rod.

Optionally, the hangers include straight-section rods and head ends, the straight-section rods extend along the axial direction of the valve stent, the head ends are disposed at the outflow ends of the straight-section rods, and the size of the head ends is larger than the width of the straight-section rods along the width direction of the straight-section rods; the head end is of an arc-shaped structure or a polygonal structure.

In order to solve the above technical problem, the utility model also provides a valve prosthesis, valve prosthesis includes: leaflets and valve support as described above the leaflets are attached to the valve support.

In order to solve the above technical problem, the present invention further provides a valve prosthesis system, including: a delivery system and a valve prosthesis as described above; the hanger sections of the valve prosthesis are embedded into the conveying grooves of the conveying system, and when the valve prosthesis is released, the hanger sections are pulled out of the conveying grooves.

In the valve stent, the valve prosthesis and the valve prosthesis system provided by the utility model, the valve stent comprises an inflow channel section, an outflow channel section and a hanging lug section which are arranged in sequence along the axial direction of the valve stent; the outflow tract section has a leaflet connecting portion for connecting leaflets; the hangers section includes hangers, the hangers set up at least in the edge the axial both sides of leaflet connecting portion, perhaps, the hangers set up at least in the edge the axial extension's that leaflet connecting portion belonged to the position. So for the atress that the hangers section can guarantee valve leaflet connecting portion is even, and then improves the whole atress of valve support even, thereby improves valve support and presses the homogeneity of holding entering conveying system and the accurate nature when releasing.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a schematic view of a valve stent provided by an embodiment of the present invention.

Fig. 2 is a schematic view of another angle of the valve stent provided by an embodiment of the present invention.

Fig. 3 is a schematic view of a hanger of a valve stent according to an embodiment of the present invention.

Fig. 4 is a schematic view of a valve prosthesis according to an embodiment of the present invention.

In the drawings:

1-a leaflet; 2-a leaflet attachment member;

10-an inflow section;

20-outflow tract section, 21-valve leaf connecting part, 22-grid frame, 221-reentrant angle, 23-stent rod;

30-a lug section, 31-a lug, 311-a straight section rod, 312-a head end;

40-transition section.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings are intended to show different emphasis, sometimes in different proportions.

As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The terms "a number of" are generally used in a sense including "at least one," the terms "at least two" are generally used in a sense including "two or more," furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, and the terms "mounted", "connected" and "connected" are to be construed broadly and may for example be fixedly connected, detachably connected, or integral; either directly or indirectly through intervening media, either internally or in any other relationship. Furthermore, as used in the present application, the disposition of an element with another element generally only means that there is a connection, coupling, fit, or drive relationship between the two elements, and the connection, coupling, fit, or drive between the two elements may be direct or indirect through intermediate elements, and is not to be understood as indicating or implying any spatial relationship between the two elements, i.e., an element may be in any orientation within, outside, above, below, or to one side of another element unless the content clearly dictates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. Furthermore, in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

The utility model provides a valve support, a valve prosthesis and a valve prosthesis system, wherein the valve support comprises an inflow channel section, an outflow channel section and a hanging lug section which are arranged in sequence along the axial direction of the valve support; the outflow tract section has a leaflet connecting portion for connecting leaflets; the hangers section includes hangers, the hangers set up at least in the edge the axial both sides of leaflet connecting portion, perhaps, the hangers set up at least in the edge the axial extension's that leaflet connecting portion belonged to the position. So for the atress that the hangers section can guarantee valve leaflet connecting portion is even, and then improves the whole atress of valve support even, thereby improves valve support and presses the homogeneity of holding entering conveying system and the accurate nature when releasing.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 4, fig. 1 is a schematic view of a valve stent provided in an embodiment of the present invention; fig. 2 is a schematic view of another angle of a valve stent according to an embodiment of the present invention; fig. 3 is a schematic view of a hanger of a valve stent according to an embodiment of the present invention; fig. 4 is a schematic view of a valve prosthesis according to an embodiment of the present invention.

The present embodiments provide a valve stent, a valve prosthesis, and a valve prosthesis system.

As shown in fig. 1 and 2, the valve stent includes: the valve support comprises an inflow channel section 10, an outflow channel section 20 and a hanging lug section 30 which are arranged in sequence along the axial direction of the valve support. Wherein an axial direction of the valve stent indicates a direction from an inflow tract to an outflow tract.

The outflow tract section 20 has a leaflet connecting portion 21, and the leaflet connecting portion 21 is used for connecting the leaflet 1 so that the leaflet 1 is connected to the valve support. The leaflet connecting portion 21 preferably represents a connecting portion of two adjacent leaflets 1, that is, a portion where the two adjacent leaflets 1 are connected to the same valve stent, that is, the leaflet connecting portion 21. The leaflet connecting part 21 may be any rod on a support grid, or a support straight rod on the support grid, or an included angle part in the support grid, as long as it is a part capable of connecting the leaflets. Preferably, the valve stent further comprises a transition section 40, wherein the transition section 40 is disposed between the inflow canal section 10 and the outflow canal section 20. It is to be understood that the configuration of the valve stent is not limited by fig. 1, for example, to make the valve stent more anatomically correct, to add a double-layered stent structure to the inflow tract segment 20, or to adjust the contour tendency of the valve stent adaptively.

As shown in fig. 2 and 3, the ear segment 30 includes an ear 31. It is understood that the hanging lugs 31 are adapted to be inserted into a delivery groove of a delivery system for positioning the valve stent on the delivery system. The hangers 31 carry the connecting force between the valve stent and the delivery system, and when the valve prosthesis is released, the hanger sections 30 are released from the delivery grooves, so that automatic separation is realized. The conveying system and the grooves thereof can refer to the prior art, and are not described herein in detail. The hangers 31 are at least arranged at two axial sides of the valve leaflet connecting portion 21, so that the hanger sections 30 can ensure that the stress of the valve leaflet connecting portion 21 is uniform, the stress of the valve support is uniform in the pressing and holding and releasing processes, and the accuracy of the valve support during releasing can be improved. Further, the hanging lugs 31 are disposed at least on two sides symmetrical in the axial direction of the leaflet connecting portion 21. In addition, the arrangement of the hanging lugs 31 can also ensure that the valve blades are stressed uniformly.

Or, the hanging lug 31 is at least arranged at a position extending along the axial direction of the leaflet connecting part 21, for example, the leaflet connecting part 21 is located at a certain position on the circumferential direction of the valve stent, and at this position, the direction parallel to the axial direction of the valve stent is the axial direction of the leaflet connecting part 21, and the hanging lug 31 is arranged along the extending direction of the axial direction, so that the leaflet connecting part 21 connected with the hanging lug 31 can indirectly bear force with the delivery system, thereby ensuring the force stability of the leaflet connecting part 21, further improving the uniform force of the whole valve stent, and further improving the uniformity of the valve stent pressed and held into the delivery system and the accuracy when releasing. Meanwhile, the arrangement can also ensure that the stress of the valve leaf is uniform.

Preferably, as shown in fig. 2 and 4, the number of the hooks 31 is doubled to the number of the leaflet connecting portions 21, and the hooks 31 are provided at least on both sides symmetrical in the axial direction of the leaflet connecting portions 21. Preferably, in the present embodiment, the number of the hanging ears 31 is, for example, preferably twice that of the leaflet connecting portions 21, the hanging ears 31 are provided at positions on both sides in the axial direction of the leaflet connecting portions 21, for example, the leaflet connecting portions 21 have connecting struts on both sides, and the hanging ears 31 are directly provided on the connecting struts on both sides of the leaflet connecting portions 21. More specifically, the number of the valve leaflet is preferably three, for example, the number of the valve leaflet connecting portion 21 is preferably three, the number of the hangers 31 is six, each two hangers 31 constitute a hanger assembly, and the hanger assemblies are distributed on both sides of the valve leaflet connecting portion 21. Preferably, the three pairs of the six hangers 31 are evenly distributed on the valve stent. In other embodiments, the hanging lugs 31 are disposed at least partially on both sides of the leaflet connecting portion 21 in axial symmetry, and some of them may not necessarily be symmetrically disposed. So set up because leaflet connecting portion 21 is used for connecting the part of valve support and adjacent two leaflet coaptations, and the material of this part can cause the valve support when the pressure is held into the sheath, and the inhomogeneous of valve support form, the homogeneity of hangers 31's setting can effective control valve support form, makes the valve support can not appear the abnormality of form after getting into the sheath pipe, for example the overlap between cradling piece and the pole, the inside caving in of partial region of support etc to lead to the support to receive the damage. Therefore, the scheme can ensure that the valve leaflet connecting part 21 is stressed uniformly, further ensure that the stress precision of the valve support is improved, and ensure the stress uniformity and the release accuracy of the valve support. Preferably, when the hangers 31 are disposed on two axially symmetrical sides along the leaflet connecting portion 21, the hangers 31 on two symmetrical sides form hanger assemblies, the hanger assemblies are uniformly distributed along the circumferential direction of the valve stent, the hanger assemblies are finally released from the delivery system, the hanger assemblies can separate from the sheath while the valve stent is stable, the valve stent is not inclined, and therefore the valve stent is uniformly attached to the valve annulus, for example, the valve stent is attached to the mitral valve, and the stability of the valve stent and the accuracy of release are further ensured.

Preferably, the number of the hanging lugs 31 is one odd number times of the number of the leaflet connecting portions 21, and the hanging lugs 31 are at least arranged at the position extending along the axial direction of the leaflet connecting portions 21, so that the valve support can be uniformly stressed and released accurately. Preferably, the leaflet connecting part 21 is a connecting straight rod extending axially, and the hanging lug 31 is directly connected to the connecting rod and is coaxial with the leaflet connecting part 21. The number of the hangers 31 and the number of the leaflet connecting portions 21 are preferably the same. The number of the hanging lugs 31 can be larger than that of the leaflet connecting parts 21, the rest hanging lugs 31 can be arranged in a position-selective manner, and the symmetrical arrangement can be carried out according to the symmetrical point positions of the valve stent. Preferably, when the hanging lugs 31 are arranged at positions extending along the axial direction of the leaflet connecting part 21, the hanging lugs 21 are uniformly distributed along the circumferential direction of the valve support. That is, valve leaflet connecting portion 21 can be preferred to set up to circumference evenly distributed, hangers 31 also circumference evenly distributed, based on the hangers subassembly description of above-mentioned evenly distributed, the single multiple hangers 31 also can further guarantee valve support press and hold the homogeneity that gets into the sheath pipe and the precision when releasing, and it is no longer repeated here.

Preferably, the number of the hangers 31 is non-odd times and non-even times of the number of the leaflet connecting portions 21, part of the hangers 31 are arranged at positions extending in the axial direction of the leaflet connecting portions 21, and the rest of the hangers 31 are arranged at two sides symmetrical in the axial direction of the leaflet connecting portions 21, so that the valve support is uniformly stressed and is accurate when released.

Preferably, as shown in fig. 2, the outflow end of the outflow tract section 20 has a row of grids 22 distributed along the circumferential direction of the valve stent, the grids 22 are arranged in a concave hexagon, and concave angles 221 of the concave hexagon are concave in the axial direction of the valve stent towards the inflow end. So set up, not only can guarantee that valve support can be pressed and held into the sheath pipe, can also make and have connection structure between the pole of being connected with the pole of reentrant corner 221 both sides, provide valve support's structural stability. For example, the rods connected with the rods on both sides of the reentrant corner 221 are straight rods, and the two straight rods are connected in such a way, so that the stability of the structure is ensured. In addition, the concave hexagon structure is concave because of the concave angle, and the longitudinal height of the valve stent is not increased while the function and performance of the valve stent are maintained, so that the overall height of the valve stent is reduced, the extension length of the intervention valve prosthesis is reduced, the safety of the valve stent is improved, and the damage to the tissue structure or the blockage of a left ventricular outflow tract caused by the valve stent is avoided. For example, in this embodiment, the valve stent includes a transition segment 40 that conforms to the mitral annulus such that the overall subvalvular height of the valve stent is reduced. As the overall sub-valvular height of the valve stent is reduced, the likelihood of interference between the valve stent and surrounding tissue is reduced, thereby reducing the risk of injury to the native chordae tendineae or papillary muscles. At the same time, the lower valve height of the valve stent can also reduce the risk of blockage of the left ventricular outflow tract.

Preferably, the outflow tract section 20 further has a support rod 23, the support rod 23 extends along the axial direction of the valve stent, and the hanging lug 31 is connected with the support rod 23, so that the connection stability and the uniformity of axial force applied to the hanging lug 31 and the outflow tract section 20 can be ensured.

Preferably, the hanging loop 31 includes a straight rod 311 and a head end 312, the straight rod 311 extends along the axial direction of the valve holder, the head end 312 is disposed at the outflow end of the straight rod 311, and along the width direction of the straight rod 311, the size of the head end 312 is greater than the width of the straight rod 311. Straight section pole 311 and head end 312 can imbed in the recess of the corresponding shape of conveying system, and head end 312 produces the shape change when straight section 11 finishes to this guarantees that when hangers 31 imbed conveying system, valve support can not produce relative axial displacement with conveying system's hangers connecting portion, thereby valve support can be pressed and held and receive in conveying system, also can when releasing conveying system, resumes original shape and conveying system and separates through the inflation of self. Preferably, the head end 312 has an arc-shaped structure or a polygonal structure. For example, the shape of the head end 312 may be a circular, elliptical, or other arc-shaped structure, or may be a square, rectangular, or diamond-shaped polygonal structure.

The present embodiment also provides a valve prosthesis, as shown in fig. 4, including: valve leaflets 1 and valve stents as described above; the valve leaflets are connected to the valve support. Of course, the valve leaflet 1 can be directly connected to the valve support, and the valve leaflet 1 can also be connected to the valve support through a valve leaflet connecting piece 2. For example, the leaflet attachments are attached to the valve stent and the leaflets are attached to the leaflet attachments. Such as prosthetic heart valves, for mitral valves, tricuspid valves, and the like. The valve prosthesis has the beneficial effects brought by the valve stent, and the description is omitted here. Other structural components of the valve prosthesis can be referred to the prior art and are not described herein.

The present embodiments also provide a valve prosthesis system comprising: a delivery system and a valve prosthesis as described above; the loop sections 30 of the valve prosthesis are inserted into the delivery grooves of the delivery system, and when the valve prosthesis is released, the loop sections 30 are pulled out of the delivery grooves. The tab section 30 is connected to a groove on the valve delivery system to allow the stent to be secured to the delivery system, to allow the stent to be compressed and retracted into the delivery system, and to automatically separate after release from the delivery system by its own expansion force. The valve prosthesis system has the beneficial effects brought by the valve prosthesis, and the details are not repeated herein. Other structural components of the valve prosthesis system may be referred to in the art and will not be described herein.

In summary, in the valve stent, the valve prosthesis and the valve prosthesis system provided by the present invention, the valve stent includes an inflow channel section, an outflow channel section and a tab section, which are sequentially arranged along the axial direction of the valve stent; the outflow tract section has a leaflet connecting portion for connecting leaflets; the hangers section includes hangers, the hangers set up at least in the edge the axial both sides of leaflet connecting portion, perhaps, the hangers set up at least in the edge the axial extension's that leaflet connecting portion belonged to the position. So for the hangers section can guarantee that the atress of leaflet connecting portion is even, and then improves the whole atress of valve support even, thereby improves the valve support and presses the homogeneity that grips and get into conveying system and the precision when the release.

It should also be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, the foregoing description is not intended to limit the invention. To anyone skilled in the art, without departing from the scope of the present invention, the technical solution disclosed above can be used to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.

Claims

1. A valve stent is characterized by comprising an inflow channel section, an outflow channel section and a suspension loop section which are sequentially arranged along the axial direction of the valve stent;

the outflow tract section has a leaflet connecting portion for connecting leaflets;

the hangers section includes the hangers, the hangers set up at least in the edge the axial both sides of leaflet connecting portion, perhaps, the hangers set up at least in the edge the axial extension's in leaflet connecting portion place position.

2. The valve stent of claim 1, wherein the number of the tabs is a double multiple of the number of the leaflet connecting portions, the tabs being disposed at least on axially symmetrical sides of the leaflet connecting portions.

3. The valve stent of claim 1, wherein the number of the tabs is a single multiple of the number of the leaflet connecting portions, the tabs being provided at least at positions extending in an axial direction of the leaflet connecting portions.

4. The valve stent of claim 1, wherein the number of the tabs is non-odd and non-even times the number of the leaflet connecting portions, a portion of the tabs being disposed at positions extending in an axial direction of the leaflet connecting portions, and the remaining tabs being disposed at axially symmetrical sides of the leaflet connecting portions.

5. The valve stent of claim 1, wherein when the hangers are disposed at axially symmetric sides along the leaflet connecting portion, the hangers at the symmetric sides form hanger assemblies which are uniformly distributed along the circumferential direction of the valve stent;

or when the hangers are arranged at the position extending along the axial direction of the valve leaflet connecting part, the hangers are uniformly distributed along the circumferential direction of the valve support.

6. The valve support of claim 1, wherein the outflow end of the outflow tract section has a row of grids distributed along the circumference of the valve support, the grids are arranged in a concave hexagon, and the concave angles of the concave hexagon are concave along the axial direction of the valve support towards the inflow end.

7. The valve stent of claim 1, wherein the outflow tract section further has a stent rod extending in an axial direction of the valve stent, and the hangers are connected to the stent rod.

8. The valve support of claim 1, wherein the hangers comprise straight-section rods and head ends, the straight-section rods extend along the axial direction of the valve support, the head ends are arranged at the outflow ends of the straight-section rods, and the size of the head ends is larger than the width of the straight-section rods along the width direction of the straight-section rods; the head end is of an arc-shaped structure or a polygonal structure.

9. A valve prosthesis, comprising: valve leaflets and a valve stent according to any one of claims 1-8;

the valve leaflets are connected to the valve support.

10. A valve prosthesis system, comprising: a delivery system and the valve prosthesis of claim 9;

the hanger sections of the valve prosthesis are embedded into the conveying grooves of the conveying system, and when the valve prosthesis is released, the hanger sections are pulled out of the conveying grooves.