CN116999207A - Valve stent, valve prosthesis and valve prosthesis system - Google Patents
Valve stent, valve prosthesis and valve prosthesis system Download PDFInfo
- Publication number
- CN116999207A CN116999207A CN202210468853.2A CN202210468853A CN116999207A CN 116999207 A CN116999207 A CN 116999207A CN 202210468853 A CN202210468853 A CN 202210468853A CN 116999207 A CN116999207 A CN 116999207A
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- lugs
- stent
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- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 239000000725 suspension Substances 0.000 claims description 7
- 210000004115 mitral valve Anatomy 0.000 description 10
- 230000035882 stress Effects 0.000 description 9
- 210000003709 heart valve Anatomy 0.000 description 8
- 210000005240 left ventricle Anatomy 0.000 description 4
- 210000001519 tissue Anatomy 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 210000003698 chordae tendineae Anatomy 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 210000003540 papillary muscle Anatomy 0.000 description 2
- 210000000591 tricuspid valve Anatomy 0.000 description 2
- 206010020772 Hypertension Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 210000001765 aortic valve Anatomy 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000000157 blood function Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 208000018578 heart valve disease Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000005246 left atrium Anatomy 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 210000003102 pulmonary valve Anatomy 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002861 ventricular Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2418—Scaffolds therefor, e.g. support stents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2427—Devices for manipulating or deploying heart valves during implantation
- A61F2/2436—Deployment by retracting a sheath
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
Landscapes
- Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention 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 ring section which are sequentially arranged along the axial direction of the valve support; the outflow tract section has a leaflet attachment portion for attaching a leaflet; the hanger section includes hangers, the hangers are disposed at least on both sides along an axial direction of the leaflet connecting portion, or the hangers are disposed at least on a position extending along an axial direction where the leaflet She Lianjie portion is located. So for the hangers section can guarantee that the atress of valve leaflet connecting portion is even, and then improves valve support whole atress even, thereby improves valve support and presses the homogeneity of holding entering conveying system and the accuracy when releasing.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a valve support, a valve prosthesis and a valve prosthesis system.
Background
With the prolongation of human life and aging of the population, the incidence of heart valve disease is increasing. According to literature statistics, valve diseases exist in 2% -7% of the elderly aged over 65 years. In European and American countries, valve disease is located in the third place after coronary heart disease and hypertension. The prosthetic heart valve (Heart Valve Prothesis) is an artificial organ implantable in the heart to replace heart valves (including aortic, pulmonary, tricuspid and mitral valves) and to allow unidirectional blood flow and function as a natural heart valve. When heart valve pathology is severe and valve function cannot be restored or improved by valve detachment or repair, then prosthetic heart valve replacement is necessary. Interventional heart valve replacement is a minimally invasive procedure controlled by a delivery system to place a valve prosthesis at a lesion site.
At present, due to the complexity of a valve primary structure, the design difficulty of a prosthetic valve stent is great, 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 valve stent release accuracy is not high. Taking the mitral valve as an example, this is reflected in: 1. the diseased mitral annulus is generally larger in size, requiring a larger sized structural valve holder, which can result in greater challenges for the valve used for mitral valve replacement when crimped and released. When crimping into the sheath, it is more difficult for the mitral valve stent to achieve a more uniform crimped configuration. When released, the mitral valve annulus is at the junction of the chambers of the left atrium and left ventricle, and its overall height is low, so the accuracy of release is also more demanding. 2. The mitral valve periphery is complex, and there are many mitral valve subvalvular tissue structures in the left ventricle, such as papillary muscles, chordae tendineae, left ventricular outflow tract, etc. If the stent used in the mitral valve is extended too far into the left ventricle, it may damage these tissue structures or cause left ventricle outflow tracts to become blocked.
Accordingly, developing a valve stent, a valve prosthesis, and a valve prosthesis system that can solve at least the above-mentioned problems is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a valve stent, a valve prosthesis and a valve prosthesis system, which are used for solving the problems that the valve stent is not uniform in shape when being pressed and held and the release accuracy of the valve stent is not high at present in the valve stent.
In order to solve the technical problems, the invention provides a valve support, which comprises an inflow channel section, an outflow channel section and a hanging ring section which are sequentially arranged along the axial direction of the valve support; the outflow tract section has a leaflet attachment portion for attaching a leaflet; the hanger section includes hangers, the hangers are disposed at least on both sides along an axial direction of the leaflet connecting portion, or the hangers are disposed at least on a position extending along an axial direction where the leaflet She Lianjie portion is located.
Optionally, the number of the hangers is double that of the leaflet connecting parts, and the hangers are at least arranged on two sides symmetrical along the axial direction of the leaflet connecting parts.
Optionally, the number of the hanging lugs is singular times that of the leaflet connecting parts, and the hanging lugs are at least arranged at the positions extending along the axial direction of the leaflet She Lianjie parts.
Optionally, the number of the lugs is not singular times and not double that of the leaflet connecting portions, part of the lugs are arranged at positions extending along the axial direction of the leaflet She Lianjie portion, and the rest of the lugs are arranged at two sides symmetrical along the axial direction of the leaflet connecting portions.
Optionally, when the hangers are disposed on two symmetrical sides along the axial direction of 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 support; alternatively, when the lugs are disposed at positions extending in the axial direction in which the petals She Lianjie are located, the lugs are uniformly distributed in the circumferential direction of the valve holder.
Optionally, the outflow end of the outflow channel 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 shape, and the concave corners of the concave hexagon shape are concave along the axial direction of the valve support towards the inflow end.
Optionally, the outflow tract section further comprises a support rod, the support rod extends along the axial direction of the valve support, and the hanging lugs are connected with the support rod.
Optionally, the suspension loop includes a straight section rod and a head end, the straight section rod extends along an axial direction of the valve support, the head end is arranged at an outflow end of the straight section rod, and a dimension of the head end is larger than a width of the straight section rod along a width direction of the straight section rod; the head end is of an arc-shaped structure or a polygonal structure.
To solve the above technical problem, the present invention also provides a valve prosthesis, including: valve leaflets and valve stents as described above, the leaflets being attached to the valve stents.
To solve the above technical problem, the present invention further provides a valve prosthesis system, comprising: a delivery system and a valve prosthesis as described above; the tab segments of the valve prosthesis are embedded in a delivery recess of the delivery system, from which they are released when the valve prosthesis is released.
In the valve support, the valve prosthesis and the valve prosthesis system provided by the invention, the valve support comprises an inflow channel section, an outflow channel section and a hanging ring section which are sequentially arranged along the axial direction of the valve support; the outflow tract section has a leaflet attachment portion for attaching a leaflet; the hanger section includes hangers, the hangers are disposed at least on both sides along an axial direction of the leaflet connecting portion, or the hangers are disposed at least on a position extending along an axial direction where the leaflet She Lianjie portion is located. So for the hangers section can guarantee that the atress of valve leaflet connecting portion is even, and then improves valve support whole atress even, thereby improves valve support and presses the homogeneity of holding entering conveying system and the accuracy when releasing.
Drawings
Those of ordinary skill in the art will appreciate that the figures are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. Wherein:
fig. 1 is a schematic view of a valve stent according to 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 suspension loop of a valve stent according to an embodiment of the present invention.
Fig. 4 is a schematic view of a valve prosthesis according to one embodiment of the present invention.
In the accompanying drawings:
1-leaflet; 2-leaflet attachment;
10-inflow segment;
20-outflow tract sections, 21-petals She Lianjie parts, 22-grid frames, 221-concave angles and 23-bracket rods;
30-hanging lugs, 31-hanging lugs, 311-straight section rods and 312-head ends;
40-transition section.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments thereof in order to make the objects, advantages and features of the invention more apparent. It should be noted that the drawings are in a very simplified form and are not drawn to scale, merely for convenience and clarity in aiding in the description of embodiments of the invention. Furthermore, the structures shown in the drawings are often part of actual structures. In particular, the drawings are shown with different emphasis instead being placed upon illustrating the various embodiments.
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 term "plurality" is generally used in a sense including "at least one," the term "at least two" is generally used in a sense including "two or more," and 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, a feature defining "a first", "a second", "a third" may include either explicitly or implicitly one or at least two of such features, and the terms "mounted", "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Furthermore, as used in this disclosure, an element disposed on another element generally only refers to a connection, coupling, cooperation or transmission between two elements, and the connection, coupling, cooperation or transmission between two elements may be direct or indirect through intermediate elements, and should not be construed as indicating or implying any spatial positional relationship between the two elements, i.e., an element may be in any orientation, such as inside, outside, above, below, or on one side, of the other element unless the context clearly indicates otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. 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 invention may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the invention.
The invention 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 ring section which are sequentially arranged along the axial direction of the valve support; the outflow tract section has a leaflet attachment portion for attaching a leaflet; the hanger section includes hangers, the hangers are disposed at least on both sides along an axial direction of the leaflet connecting portion, or the hangers are disposed at least on a position extending along an axial direction where the leaflet She Lianjie portion is located. So for the hangers section can guarantee that the atress of valve leaflet connecting portion is even, and then improves valve support whole atress even, thereby improves valve support and presses the homogeneity of holding entering conveying system and the accuracy 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 according to an embodiment of the present invention; FIG. 2 is a schematic view of a valve stent according to another embodiment of the present invention; fig. 3 is a schematic view of a suspension loop of a valve stent according to an embodiment of the present invention; fig. 4 is a schematic view of a valve prosthesis according to one 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: comprises an inflow channel section 10, an outflow channel section 20 and a hanging ring section 30 which are sequentially arranged along the axial direction of the valve support. Wherein the axial direction of the valve holder indicates the direction of the inflow channel to the outflow channel.
The outflow tract 20 has a leaflet attachment 21, the leaflet attachment 21 being for attaching the leaflet 1 such that the leaflet 1 is attached to the valve holder. The leaflet attachment portion 21 preferably represents an attachment portion of two adjacent leaflets 1, that is, a portion where two adjacent leaflets 1 are attached to the same valve holder, that is, the leaflet attachment portion 21. The leaflet connecting portion 21 may be any rod on a stent mesh, may be a stent straight rod on a stent mesh, or may be an included angle portion in a stent mesh, so long as it is a portion capable of connecting leaflets. Preferably, the valve stent further comprises a transition section 40, said transition section 40 being arranged between the inflow tract section 10 and the outflow tract section 20. It should be understood that the structure of the valve stent is not limited by fig. 1, and for example, to make the valve stent more suitable for the anatomical structure, a double-layered stent structure may be added to the inflow segment 20, or the profile trend of the valve stent may be adaptively adjusted.
As shown in fig. 2 and 3, the tab segment 30 comprises a tab 31. It will be appreciated that the lugs 31 are adapted to be inserted into a delivery recess of a delivery system for positioning the valve holder on the delivery system. The lugs 31 carry the force of the connection between the valve holder and the delivery system, and when the valve prosthesis is released, the lugs segments 30 come out of the delivery grooves, achieving an automatic separation. The conveying system and the grooves thereof are referred to in the prior art, and are not described herein. The hangers 31 are at least arranged on two sides of the axial direction 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, and further the valve stent is uniformly stressed in the pressing and holding and releasing processes, and the accuracy of the valve stent during release can be improved. Further, the hanging lugs 31 are provided at least on both sides symmetrical in the axial direction of the leaflet attachment portion 21. In addition, the hanging lugs 31 can also ensure that the stress of the valve leaflet is even.
Or, the suspension loop 31 is at least disposed at a position extending along the axial direction of the leaflet connecting portion 21, for example, the leaflet connecting portion 21 is located at a position on the circumferential direction of the valve support, and in this position, there is a direction parallel to the axial direction of the valve support, and this direction is the axial direction of the leaflet connecting portion 21, and the suspension loop 31 is disposed along this axial extending direction, so that the leaflet connecting portion 21 connected with the suspension loop 31 can indirectly bear force with the delivery system, and further the stability of the leaflet connecting portion 21 under force is ensured, and further the overall uniform stress of the valve support is improved, thereby improving the uniformity of the pressing and holding of the valve support into the delivery system and the accuracy during release. Meanwhile, the valve is arranged in such a way, so that the stress of the valve blades can be ensured to be even.
Preferably, as shown in fig. 2 and 4, the number of the lugs 31 is double the number of the leaflet attachment parts 21, and the lugs 31 are provided at least on both sides symmetrical in the axial direction of the leaflet attachment parts 21. Preferably, in the present embodiment, the number of the lugs 31 is, for example, preferably twice that of the leaflet connecting parts 21, the lugs 31 are disposed at positions along both sides of the leaflet connecting parts 21 in the axial direction, for example, both sides of the leaflet connecting parts 21 have connecting struts, and the lugs 31 are directly disposed on the connecting struts on both sides of the leaflet connecting parts 21. More specifically, the number of the valve leaflets is preferably three, the number of the valve leaflet connecting portions 21 is preferably three, the number of the lugs 31 is six, each two lugs 31 form a lug assembly, and the lug assemblies are distributed on two sides of the valve leaflet connecting portions 21. More preferably, the three pairs of lugs 31 are evenly distributed over the valve holder. In other embodiments, at least a portion of the lugs 31 are disposed on axially symmetrical sides of the leaflet attachment portion 21, and a portion may not be symmetrically distributed. The arrangement is that the leaflet connecting portion 21 is used for connecting the valve stent and the joint parts of two adjacent leaflets, the material of the valve stent can cause the non-uniformity of the valve stent shape when the valve stent is pressed into the sheath, and the arrangement of the hanging lugs 31 can effectively control the uniformity of the valve stent shape, so that the valve stent can not have abnormal shapes after entering the sheath, such as overlapping between a stent rod and a rod, inward recessing of a stent part area and the like, and the stent is damaged. Therefore, the valve leaflet connecting part 21 can be guaranteed to be stressed uniformly by the scheme, the stress precision of the valve stent is further guaranteed to be improved, and the stress uniformity and the release time precision of the valve stent are guaranteed. Preferably, when the lugs 31 are disposed on two sides symmetrical along the axial direction of the leaflet connecting portion 21, the lugs 31 on two sides symmetrical form lug assemblies, the lug assemblies are uniformly distributed along the circumferential direction of the valve support, the uniformly distributed lug assemblies are finally released from the delivery system, and the lug assemblies can enable the valve support to be stable and simultaneously separate from the sheath tube, so that the valve support cannot incline, and the valve support is uniformly attached to the valve annulus, for example, attached to a mitral valve, and stability and release accuracy of the valve support are further ensured.
Preferably, the number of the hanging lugs 31 is a singular multiple of the number of the leaflet connecting portions 21, and the hanging lugs 31 are at least arranged at positions extending along the axial direction of the leaflet connecting portions 21, so that the uniformity of stress of the valve stent and the accuracy in releasing can be ensured. Preferably, the leaflet connecting portion 21 is a connecting straight rod, the connecting straight rod extends along the axial direction, and the hanging tab 31 is directly connected to the connecting strut and is on the same axis as the leaflet connecting portion 21. The number of lugs 31 and the number of leaflet attachment portions 21 are preferably the same. The number of the hanging lugs 31 can be larger than the number of the leaflet connecting parts 21, the rest hanging lugs 31 can be arranged in a position selecting mode, and symmetry can be arranged according to symmetry points of the valve support. Preferably, when the lugs 31 are disposed at positions extending in the axial direction in which the leaflet attachment portions 21 are located, the lugs 21 are uniformly distributed in the circumferential direction of the valve holder. That is, the leaflet connecting portion 21 may be preferably configured to be circumferentially and uniformly distributed, and the lugs 31 are also circumferentially and uniformly distributed, and based on the above description of uniformly distributed lug components, the single multiple of the lugs 31 can further ensure uniformity of the valve stent pressing and holding into the sheath tube and accuracy during release, which are not described herein.
Preferably, the number of the lugs 31 is not singular times or not double the number of the leaflet connecting portions 21, part of the lugs 31 are disposed at positions extending along the axial direction of the leaflet connecting portions 21, and the rest of the lugs 31 are disposed at two symmetrical sides along the axial direction of the leaflet connecting portions 21, and as such, the uniformity of stress of the valve stent and the accuracy in release are ensured.
Preferably, as shown in fig. 2, the outflow end of the outflow tract section 20 has a row of grid frames 22 distributed along the circumferential direction of the valve support, the grid frames 22 are arranged in a concave hexagon shape, and concave corners 221 of the concave hexagon shape are concave along the axial direction of the valve support towards the inflow end. By the arrangement, the valve stent can be held into the sheath tube in a pressed mode, and a connecting structure is arranged between the rods connected with the rods on the two sides of the concave angle 221, so that the structural stability of the valve stent is provided. For example, the rods connected with the rods at two sides of the concave angle 221 are straight rods, and the stability of the structure is ensured by the connection mode between the two straight rods. In addition, the concave hexagonal structure is concave due to the concave angle, so that the function and the performance of the valve support are maintained, the longitudinal height of the valve support is not increased, the overall height of the valve support is further reduced, the extension length of an interventional valve prosthesis is further reduced, the safety type of the valve support is improved, and the damage to a tissue structure or the blockage of a left chamber outflow channel caused by the valve support is avoided. For example, in this embodiment, the valve stent includes a transition section 40 that conforms to the mitral annulus such that the overall subvalvular height of the valve stent is reduced. When the overall subvalvular height of the valve stent is reduced, the likelihood of interference of the valve stent with surrounding tissue is reduced, thereby reducing the risk of damaging native chordae tendineae or papillary muscles. Simultaneously, the subvalvular height of the valve support is reduced, and the risk of blockage of the outflow channel of the left chamber is also reduced.
Preferably, the outflow tract 20 further comprises a support rod 23, the support rod 23 extends along the axial direction of the valve support, and the hanging lugs 31 are connected with the support rod 23, so that the connection stability of the hanging lugs 31 and the outflow tract 20 and the uniformity of axial stress can be ensured.
Preferably, the hanging tab 31 includes a straight section rod 311 and a head end 312, the straight section rod 311 extends along an axial direction of the valve support, the head end 312 is disposed at an outflow end of the straight section rod 311, and a size of the head end 312 is larger than a width of the straight section rod 311 along a width direction of the straight section rod 311. The straight section rod 311 and the head end 312 can be embedded into a groove with a corresponding shape of the conveying system, and the head end 312 generates shape change when the straight section 11 is finished, so that when the hanging lugs 31 are embedded into the conveying system, the valve support can be prevented from generating relative axial displacement with hanging lug connecting parts of the conveying system, and therefore the valve support can be pressed and held into the conveying system, and can be restored to the original shape through expansion of the valve support and separated from the conveying system when the conveying system is released. More preferably, the head end 312 has an arcuate or polygonal configuration. For example, the shape of the head end 312 may be an arc-shaped structure such as a circle, an ellipse, or a polygonal structure such as a square, a rectangle, a diamond, etc.
This embodiment also provides a valve prosthesis, as shown in fig. 4, comprising: the leaflet 1 and valve stent as described above; the valve leaflets are connected with the valve support. Of course, the leaflet 1 may be directly attached to the valve holder, and the leaflet 1 may also be attached to the valve holder by a leaflet attachment 2. For example, leaflet connectors are attached to the valve stent and leaflets are attached to the leaflet connectors. Such as prosthetic heart valve prostheses for mitral and tricuspid valves and the like. The valve prosthesis has the beneficial effects of a valve stent, and is not described in detail herein. Other structural components of the valve prosthesis are referred to in the art and will not be described here.
The present embodiment also provides a valve prosthesis system, comprising: a delivery system and a valve prosthesis as described above; the tab segments 30 of the valve prosthesis are embedded in a delivery recess of the delivery system, from which the tab segments 30 are released when the valve prosthesis is released. The hanger section 30 is connected with a groove on the valve conveying system, so that the bracket can be fixed on the conveying system, can be retracted into the conveying system after being pressed and held, and can be automatically separated after being released from the conveying system through the self expansion force. The valve prosthesis system has the beneficial effects of a valve prosthesis, and is not described in detail herein. Other structural components of the valve prosthesis system may be referred to the prior art and are not described herein.
In summary, in the valve stent, the valve prosthesis and the valve prosthesis system provided by the invention, the valve stent comprises an inflow channel section, an outflow channel section and a hanging ring section which are sequentially arranged along the axial direction of the valve stent; the outflow tract section has a leaflet attachment portion for attaching a leaflet; the hanger section includes hangers, the hangers are disposed at least on both sides along an axial direction of the leaflet connecting portion, or the hangers are disposed at least on a position extending along an axial direction where the leaflet She Lianjie portion is located. So for the hangers section can guarantee that the atress of valve leaflet connecting portion is even, and then improves valve support whole atress even, thereby improves valve support and presses the homogeneity of holding entering conveying system and the accuracy when releasing.
It should also be appreciated that while the present invention has been disclosed in the context of a preferred embodiment, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A valve support, which is characterized by comprising an inflow channel section, an outflow channel section and a hanging ring section which are sequentially arranged along the axial direction of the valve support;
the outflow tract section has a leaflet attachment portion for attaching a leaflet;
the hanger section includes hangers, the hangers are disposed at least on both sides along an axial direction of the leaflet connecting portion, or the hangers are disposed at least on a position extending along an axial direction where the leaflet She Lianjie portion is located.
2. The valve stent of claim 1, wherein the number of lugs is double the number of leaflet attachment portions, the lugs being disposed on at least two sides that are symmetrical in an axial direction of the leaflet attachment portions.
3. The valve stent of claim 1, wherein the number of lugs is a singular multiple of the number of leaflet attachment portions, the lugs being disposed at least at positions extending in an axial direction in which the leaflets She Lianjie are located.
4. The valve stent of claim 1, wherein the number of lugs is not a singular multiple and not a double of the number of leaflet attachment portions, a portion of the lugs being disposed at a position extending in an axial direction in which the leaflet She Lianjie portions are located, and the remaining lugs being disposed on both sides symmetrical in the axial direction of the leaflet attachment portions.
5. The valve stent of claim 1, wherein when the lugs are disposed on two sides that are symmetrical in an axial direction of the leaflet attachment portion, the lugs on the two sides that are symmetrical form lug assemblies that are evenly distributed along a circumferential direction of the valve stent;
alternatively, when the lugs are disposed at positions extending in the axial direction in which the petals She Lianjie are located, the lugs are uniformly distributed in the circumferential direction of the valve holder.
6. The valve stent of claim 1, wherein the outflow end of the outflow tract section has a row of lattice struts distributed circumferentially of the valve stent, the lattice struts being arranged in a concave hexagonal pattern with concave corners concave in a direction axially of the valve stent toward the inflow end.
7. The valve stent of claim 1, wherein the outflow tract section further has a stent strut extending in an axial direction of the valve stent, the hanger being connected to the stent strut.
8. The valve stent of claim 1, wherein the suspension loop comprises a straight segment rod and a head end, the straight segment rod extends along the axial direction of the valve stent, the head end is arranged at the outflow end of the straight segment rod, and the head end is larger than the straight segment rod in size along the width direction of the straight segment rod; the head end is of an arc-shaped structure or a polygonal structure.
9. A valve prosthesis, the valve prosthesis comprising: the valve leaflet and valve stent of any one of claims 1-8;
the valve leaflets are connected with the valve support.
10. A valve prosthesis system, comprising: a delivery system and a valve prosthesis according to claim 9;
the tab segments of the valve prosthesis are embedded in a delivery recess of the delivery system, from which they are released when the valve prosthesis is released.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468853.2A CN116999207A (en) | 2022-04-29 | 2022-04-29 | Valve stent, valve prosthesis and valve prosthesis system |
| PCT/CN2022/096675 WO2023206709A1 (en) | 2022-04-29 | 2022-06-01 | Valve stent, valve prosthesis, and valve prosthesis system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210468853.2A CN116999207A (en) | 2022-04-29 | 2022-04-29 | Valve stent, valve prosthesis and valve prosthesis system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116999207A true CN116999207A (en) | 2023-11-07 |
Family
ID=88517113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210468853.2A Pending CN116999207A (en) | 2022-04-29 | 2022-04-29 | Valve stent, valve prosthesis and valve prosthesis system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116999207A (en) |
| WO (1) | WO2023206709A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3852679A1 (en) * | 2018-09-20 | 2021-07-28 | St. Jude Medical, Cardiology Division, Inc. | Attachment of leaflets to prosthetic heart valve |
| CN111714250A (en) * | 2019-03-22 | 2020-09-29 | 上海微创心通医疗科技有限公司 | Heart valve support and prosthesis thereof |
| CN111184596A (en) * | 2020-02-18 | 2020-05-22 | 科凯(南通)生命科学有限公司 | Artificial heart valve |
| CN113679510A (en) * | 2020-05-19 | 2021-11-23 | 上海微创心通医疗科技有限公司 | Heart valve prosthesis and stent and replacement system thereof |
| CN114073603B (en) * | 2020-08-20 | 2023-05-02 | 先健科技(深圳)有限公司 | Valve support and artificial heart valve |
| CN212415992U (en) * | 2020-09-28 | 2021-01-29 | 上海微创心通医疗科技有限公司 | Artificial heart valve leaflet and heart valve prosthesis |
-
2022
- 2022-04-29 CN CN202210468853.2A patent/CN116999207A/en active Pending
- 2022-06-01 WO PCT/CN2022/096675 patent/WO2023206709A1/en unknown
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| Publication number | Publication date |
|---|---|
| WO2023206709A1 (en) | 2023-11-02 |
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