CN113331998A - Artificial heart valve - Google Patents
Artificial heart valve Download PDFInfo
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- CN113331998A CN113331998A CN202110630550.1A CN202110630550A CN113331998A CN 113331998 A CN113331998 A CN 113331998A CN 202110630550 A CN202110630550 A CN 202110630550A CN 113331998 A CN113331998 A CN 113331998A
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- heart valve
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- revolving body
- valve
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Images
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
- A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
-
- 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
- A61F2/2421—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 non-pivoting rigid closure members
-
- 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
- A61F2/2442—Annuloplasty rings or inserts for correcting the valve shape; Implants for improving the function of a native heart valve
- A61F2/246—Devices for obstructing a leak through a native valve in a closed condition
Abstract
The invention relates to the field of medical instruments, in particular to a heart valve prosthesis, and more particularly relates to a Tesla valve type heart valve prosthesis. The valve can realize the one-way passing effect on the basis of not using the moving part, namely, the valve effect that the fluid passes in one way and flows reversely to stop is achieved, and the service life of the artificial heart valve is prolonged. The valve material is selected from a super-lubricating material or a super-lubricating material coating is designed on the surface of the new valve, so that the generation of thrombus is avoided. By combining the characteristics of the structure and the material, the artificial heart valve has longer service life and better high safety factor.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a heart valve prosthesis, and more particularly relates to a Tesla valve type heart valve prosthesis.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The artificial Heart Valve (Heart Valve prosthesis) is an artificial organ which can be implanted in the Heart to replace Heart valves (aortic Valve, tricuspid Valve and mitral Valve), can make blood flow in one direction and has the function of a natural Heart Valve. Prosthetic valves are divided into two broad categories depending on the material used: one type is a mechanical flap made entirely of artificial material; another type is a so-called biologic valve made wholly or partially of biologic tissue. Whether mechanical or biological, the basic structure of the valve comprises three parts, namely a metal valve frame, an obstruction body and a suture ring. The metal petal frame is generally made of stainless steel, titanium, cobalt-nickel alloy or other superhard metals; the sewing ring is a part for sewing the artificial valve to the human heart valve ring, and is made of a knitted material, and polypropylene, dacron, polytetrafluoroethylene, and recently, carbon fiber have been used. Biological valves are typically made from porcine aortic valves and bovine pericardial valves.
At present, the clinical artificial heart mechanical valve has better durability but is easy to form thrombus, and the patient needs lifetime anticoagulation after operation; patients with biological valves do not need to take anticoagulants, but have a short life span due to the problem of calcification of the biological valve.
In addition, the inventor researches and discovers that the conventional mechanical valve of the artificial heart not only has the problem of easy thrombus formation, but also has the problem of fatigue damage of the mechanical valve due to the movement of a mechanical structural part, thereby influencing the service life.
Disclosure of Invention
In order to solve the problems of easy thrombus formation and easy fatigue damage of a mechanical valve in the prior art, the invention provides a prosthetic heart valve, in particular to a Tesla valve type prosthetic heart valve, by utilizing the fluid mechanics principle and through structural design. The valve has no moving parts, so the valve has long service life. The valve material selects super-lubricating material or the super-lubricating material coating is designed on the surface of the new valve, so that the valve does not need anticoagulant, and one end or a plurality of ends of the valve are designed with a rotary type expansion fixing structure connected with the heart for fixed connection in use.
Specifically, the invention is realized by the following technical scheme:
the invention provides a heart valve prosthesis, which comprises a central shaft and a hollow revolving body, wherein the hollow revolving body is sleeved on the periphery of the central shaft and is coaxial with the central shaft, a cavity between the central shaft and the hollow revolving body is a revolving cavity, a guide ring is arranged in the revolving cavity, and a longitudinal section of a cavity structure formed by the central shaft, the guide ring and the hollow revolving body along the axial direction forms a Tesla valve.
In a second aspect of the invention, a rotary body tesla valve is provided, comprising a prosthetic heart valve.
One or more technical schemes of the invention have the following beneficial effects:
1) the Tesla valve type artificial heart valve is used, so that a one-way passing effect can be realized on the basis of not using a moving part, namely, the valve effect that fluid passes through in a one-way and flows reversely to stop is achieved, and the service life of the artificial heart valve is prolonged. The valve material is selected from a super-lubricating material or a super-lubricating material coating is designed on the surface of the new valve, so that the generation of thrombus is avoided. By combining the characteristics of the structure and the material, the artificial heart valve has longer service life and better high safety factor.
2) The artificial heart valve can be provided with a plurality of hollow revolution bodies and flow guide rings as required to form a plurality of revolution cavities to increase blood flux.
3) According to the actual use demand, can adjust hollow solid of revolution and water conservancy diversion ring quantity to adjust whole artificial heart valve length, radial size, satisfy different user demands.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Embodiments of the invention are described in detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of 3/4 longitudinal section construction of a prosthetic heart valve disclosed in example 1 of the present invention;
FIG. 2 is a cross-sectional view of a prosthetic heart valve disclosed in example 2 of the present invention;
FIG. 3 is a cross-sectional view of a prosthetic heart valve disclosed in example 3 of the present invention;
wherein: 1. the device comprises a central shaft, 2, a first hollow revolving body, 3, a first revolving cavity, 4, a first diversion ring, 5, a second hollow revolving body, 6, a second revolving cavity, 7, a second diversion ring, 8, a supporting piece, 9 and a fixed end.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The experimental procedures, in which specific conditions are not noted in the following examples, are generally carried out according to conventional conditions or according to conditions recommended by the manufacturers.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It is to be understood that the terms "upper", "lower", "horizontal", and the like, as used herein, are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In order to solve the problems of easy thrombus formation and easy fatigue damage of a mechanical valve in the prior art, the invention provides a prosthetic heart valve, in particular to a Tesla valve type prosthetic heart valve, by utilizing the fluid mechanics principle and through structural design. The valve has no moving parts, so the valve has long service life. The valve material selects super-lubricating material or the super-lubricating material coating is designed on the surface of the new valve, so that the valve does not need anticoagulant, and one end or a plurality of ends of the valve are provided with a rotary type expansion fixing structure connected with the heart for fixed connection in use.
Specifically, the invention is realized by the following technical scheme:
in a first aspect of the invention, there is provided a prosthetic heart valve comprising: the central shaft and the hollow revolving body are sleeved on the periphery of the central shaft and are coaxial with the central shaft, a cavity between the central shaft and the hollow revolving body is a revolving cavity, a flow guide ring is arranged in the revolving cavity, and a longitudinal section of a cavity structure formed by the central shaft, the flow guide ring and the hollow revolving body along the axis direction forms a Tesla valve.
Although some tesla valve structures are disclosed in the prior art, the tesla valve structures are mostly two-dimensional structures, fluid control can be completed only from a certain plane, and the tesla valve structures are large in size and single in function.
The inventor earnestly researches the existing artificial heart valve and finds that the existing artificial heart valve has the problems of easy fatigue damage and easy thrombus generation, so that the invention provides the Tesla valve type artificial heart valve, which not only reduces the size of the valve, but also more importantly adjusts the structure of the whole valve, expands the traditional two-dimensional valve structure into a three-dimensional structure, fully utilizes the space on the limited circular blood flow channel section and increases the blood flow flux. Meanwhile, the channel structure of the Tesla valve in the artificial heart valve is reasonably designed, so that the requirements of different blood fluxes and different sizes can be met.
In one or more specific embodiments, the number of the hollow revolving bodies is 1 or more, the hollow revolving bodies have different diameters, and the hollow revolving bodies are sequentially sleeved on the periphery of the central shaft from small to large in diameter. The design can lead the artificial heart valve to be provided with one or more independent rotary cavities, and the blood flow is increased.
Preferably, the cavity between the central shaft and the hollow revolving body and between the adjacent hollow revolving bodies is a revolving cavity, a guide ring is arranged in the revolving cavity, and the longitudinal section of the cavity formed by the central shaft, the hollow revolving body and the guide ring positioned between the central shaft and the hollow revolving body and the longitudinal section of the cavity formed by the adjacent hollow revolving body and the guide ring positioned between the adjacent hollow revolving body along the axial direction form a tesla valve.
The rotary structure is designed for the traditional Tesla valve in combination with the actual use scene of the artificial heart valve, and the rotary design of the Tesla valve channel not only meets the requirement of unidirectional blood flow, but also does not use a movable structure, avoids fatigue damage of the device, and can realize the effect of realizing larger blood flow in a smaller space.
Taking 1 hollow revolving body as an example, the artificial heart valve sequentially comprises a central shaft, a revolving cavity, a flow guide ring and the hollow revolving body from inside to outside.
Taking 2 hollow revolving bodies as an example, the artificial heart valve sequentially comprises a central shaft, a first revolving cavity, a first flow guide ring, a first hollow revolving body, a second revolving cavity, a second flow guide ring and a second hollow revolving body from inside to outside.
In one or more embodiments of the present invention, a plurality of diversion rings are arranged in parallel in the same rotation cavity, and the diversion rings are coaxial with the central shaft, so that the rotation cavity can be divided into a plurality of diversion channels, and the more diversion channels, the better the one-way circulation effect.
Preferably, the diameters of the guide rings in the same rotary cavity are the same, so that the size and the shape of the cavity can be periodically changed in each independent Tesla valve channel, and the uniform flow of blood is facilitated.
If the diameters of the guide rings in the same rotary cavity are different, the size and the shape of the channel of the formed Tesla valve are not periodically changed, which is not beneficial to the smooth flow of blood.
In one or more embodiments of the present invention, the deflector ring is fixed to the central shaft or the hollow rotator by a support member. The guide ring is not contacted with the hollow revolving body and the central shaft, so that a blood channel is formed, and the supporting piece is a ribbed plate or a supporting rod.
However, if a generally plate-like fixation is used, there is a risk of blocking the blood flow, and therefore in one or more embodiments of the present invention, the support members are axial ribs, and the plane direction of the axial ribs coincides with the direction of the chamber or the blood flow, which can both serve to fix the support members and avoid blood blockage.
The diameter of the hollow revolving body is periodically changed along the axial direction, and the diameter of the hollow revolving body positioned outside the guide ring is the largest. The diameter of the hollow revolving body is periodically changed along the axial direction to present a concave-convex structure, so that the hollow revolving body can be better fixed with the heart during assembly or use, and displacement is avoided.
Preferably, the hollow revolving body is changed in a periodic water drop shape in the axial direction, and the diameter of the hollow revolving body close to the inner side guide ring is large. The shape of the water drop is an asymmetric structure along the axial direction, one end of the water drop is small in diameter, and the other end of the water drop is large in diameter. The upper end is the small diameter, the lower end is the large diameter, and the lower end of one water drop is connected with the upper end of the next water drop. From the upper end to the lower end of a water drop, the diameter of the hollow revolving body is slowly increased, and from the lower end to the upper end of the next water drop, the size of the hollow revolving body is sharply reduced, and a step-like structure appears and is a fixed end. The hollow revolving body has large diameter change and is similar to a step shape, so that the hollow revolving body is beneficial to being fixed on the heart.
In another embodiment, the wall of the hollow revolving body near the inner diversion ring is thinner than that far from the inner diversion ring, so that the revolving cavity is larger in size on the premise of not influencing the size of the whole artificial heart valve, and the blood circulation is improved.
Preferably, the position of the hollow revolving body with the larger diameter is provided with the suture hole, and the position of the hollow revolving body with the larger diameter is the position of the water drop with the larger shape and size or the area with the suddenly changed size, so that the geometric shape fixing effect is good, and the suture hole is assisted to realize better fixation.
In another embodiment, the fixing end of the artificial heart valve connected with the heart is a rotary type expansion structure, the rotary type expansion structure is provided with suture holes, and in the embodiment, the shape fixation and the suture fixation are matched with each other to realize the connection and fixation of the artificial heart valve and the heart.
In one or more embodiments of the present invention, the radial dimension of the hollow revolving body is larger than the central axis, and the axial dimension is the same as the central axis, so that it can be ensured that one or more hollow revolving bodies are sequentially sleeved on the periphery of the central axis to form one or more revolving cavities.
Preferably, the diameters of the guide rings in the adjacent rotary cavities are different, and the diameters of the guide rings in the adjacent rotary cavities are different in order to ensure the connectivity of the rotary cavities and the connectivity of the tesla valves due to the fact that the sizes of the adjacent hollow rotary bodies are different.
In one or more embodiments of the invention, the diversion rings in adjacent rotary cavities are arranged in a staggered manner, so that the dislocation is prevented, the structures of each independent rotary cavity and the Tesla valve are not influenced, and the overall size of the artificial heart valve is reduced on the premise of ensuring connectivity.
In one or more embodiments of the invention, the material of the artificial heart valve is selected from super-lubricating materials or a super-lubricating material coating, preferably a polytetrafluoroethylene super-lubricating coating material, is designed on the surface of each structure of the artificial heart valve.
Preferably, the prosthetic heart valve axis is straight or curved or the prosthetic heart valve material is bendable. If a rigid material is used for the prosthetic heart valve, the rigid prosthetic heart valve is prone to damage to the heart or its connections during the beating or periodic deformation of the heart. In the embodiment, the artificial heart valve can be bent, and can deform along with the movement of the heart on the premise of not influencing blood circulation, so that surrounding organs or tissues are prevented from being damaged. In addition, due to the arrangement of the rotary type expansion structure and the suture holes positioned on the rotary type expansion structure, the artificial heart valve can be effectively prevented from shifting, and the use safety and stability are ensured.
The artificial heart valve is straight or bent along the axial direction, and can meet different use requirements.
In a second aspect of the invention, a rotary body tesla valve is provided, comprising a prosthetic heart valve.
The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
Example 1
As shown in fig. 1, which is a schematic diagram of a 3/4 longitudinal section structure of a prosthetic heart valve disclosed in this embodiment, the prosthetic heart valve sequentially includes a central shaft 1, a first revolving cavity 3, a first guide ring 4, a first hollow revolving body 2, a second revolving cavity 6, a second guide ring 7, and a second hollow revolving body 5 from inside to outside, the diameter of the first hollow revolving body 2 is smaller than that of the second hollow revolving body 5, the first hollow revolving body 2 and the second hollow revolving body 5 are sequentially sleeved on the periphery of the central shaft 1, and the first hollow revolving body 2 and the second hollow revolving body 5 are coaxial with the central shaft 1. The cavity between the central shaft 1 and the first hollow revolving body 2 is a first revolving cavity 3, a first guide ring 4 is arranged in the first revolving cavity 3, and a longitudinal section of a cavity structure formed by the central shaft 1, the first guide ring 4 and the first hollow revolving body 2 along the axis direction forms a first-stage Tesla valve. The first rotary cavity 3 is internally provided with 3 first guide rings 4, the 3 first guide rings 4 are parallel to each other and coaxial with the central shaft 1, and the first guide rings 4 are fixed on the central shaft 1 and the first hollow rotary body 2 through a support member 8.
The cavity between the second hollow revolving body 5 and the first hollow revolving body 2 is a second revolving cavity 6, a second guide ring 7 is arranged in the second revolving cavity 6, and a longitudinal section of a cavity structure formed by the first hollow revolving body 2, the second guide ring 7 and the second hollow revolving body 5 along the axis direction forms a second-stage Tesla valve. And 3 second guide rings 7 are arranged in the second rotary cavity 6, the 3 second guide rings 7 are parallel to each other and coaxial with the central shaft 1, and the second guide rings 7 are fixed on the first hollow rotary body 2 and the second hollow rotary body 5 through supporting pieces.
The first stage Tesla valve is positioned at the outer side of the second stage Tesla valve, and the first stage Tesla valve and the second stage Tesla valve are coaxial. The first guide ring 4 and the second guide ring 7 are arranged in a staggered mode and are not at the same height, and the overall size can be reduced on the premise that the blood flux is guaranteed by the aid of the design. The second hollow revolving body 5 and the first hollow revolving body 2 have different diameters and the same shape, and the parts with larger diameters in the second hollow revolving body 5 and the first hollow revolving body 2 are not positioned at the same height.
The second hollow revolving body 5 is changed in a periodical water drop shape in the axial direction, the second hollow revolving body 5 is large in diameter at a position close to the inner second guide ring 7, the wall of the second hollow revolving body 5 at a position close to the inner second guide ring 7 is thinner than the wall of the second hollow revolving body 5 at a position far away from the inner second guide ring 7, and a sewing hole is formed in a position with a large diameter of the second hollow revolving body 5.
The second hollow rotary body 5 is formed by connecting a plurality of water drops end to end. The shape of the water drop is an asymmetric structure along the axial direction, one end of the water drop is small in diameter, and the other end of the water drop is large in diameter. The upper end is the small diameter, the lower end is the large diameter, and the lower end of one water drop is connected with the upper end of the next water drop. From the upper end to the lower end of a water drop, the diameter of the second hollow revolving body 5 is gradually increased, from the lower end to the upper end of the next water drop, the size of the second hollow revolving body 5 is sharply reduced, a step-like structure appears, and the second hollow revolving body is a fixed end 9 and is used for fixing with heart tissues.
In fig. 1, taking the first rotating cavity 3 as an example, if blood moves from bottom to top, when blood flows through the first flow guiding ring 4, the blood is divided into two parts, one part flows into the channel close to the central axis 1, the other part flows into the channel far from the central axis 1, after flowing through the first flow guiding ring 4, the two parts of blood have the same direction, and after being collected, the blood continues to move forward, so that forward flow is realized.
The first hollow revolving body 2 is formed by connecting a plurality of water drop shapes end to end, and the lower diameter of each water drop shape structure is large, and the upper diameter is small, so that a revolving and expanding structure is formed. If blood moves from top to bottom, the blood is divided into two parts when passing through the first deflector ring 4, one part flows into the channel close to the central axis 1 and the other part flows into the channel far from the central axis 1. The radius of the movement of the blood at the lower part is large, so after the two parts flow through the first flow guide ring 4, the blood flowing through the channel far away from the central shaft 1 tends to move upwards, the blood flowing through the channel close to the central shaft 1 tends to move downwards, the energy loss of the two blood streams is reduced, the movement speed or the blood volume of the blood moving downwards is reduced, and by analogy, the blood cannot move downwards, and the effect of inhibiting the reverse movement of the blood is achieved.
Example 2
As shown in fig. 2, a cross-sectional view of the prosthetic heart valve disclosed in this embodiment is different from embodiment 1 in that only one layer of the first hollow rotator 2 is designed outside the central shaft 1 to adapt to the passing diameter, which can be applied to a small-diameter space.
Example 3
As shown in fig. 3, a cross-sectional view of a prosthetic heart valve disclosed in this embodiment is different from embodiment 1 in that 6 water drop shapes are provided in the axial direction of the second hollow rotator 5 and the first hollow rotator 2, and 6 flow guide rings are provided respectively, so that a more efficient unidirectional control effect can be achieved.
The surfaces of all structures of the artificial heart valve are designed with polytetrafluoroethylene super-lubricating coating materials.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A prosthetic heart valve, comprising: the central shaft and the hollow revolving body are sleeved on the periphery of the central shaft and are coaxial with the central shaft, a cavity between the central shaft and the hollow revolving body is a revolving cavity, a flow guide ring is arranged in the revolving cavity, and a longitudinal section of a cavity structure formed by the central shaft, the flow guide ring and the hollow revolving body along the axis direction forms a Tesla valve.
2. The heart valve prosthesis of claim 1, wherein the number of the hollow revolved bodies is plural, and the hollow revolved bodies have different diameters and are sequentially sleeved on the periphery of the central shaft from small to large in diameter;
preferably, the cavity between the central shaft and the hollow revolving body and between the adjacent hollow revolving bodies is a revolving cavity, a guide ring is arranged in the revolving cavity, and the longitudinal section of the cavity formed by the central shaft, the hollow revolving body and the guide ring positioned between the central shaft and the hollow revolving body and the longitudinal section of the cavity formed by the adjacent hollow revolving body and the guide ring positioned between the adjacent hollow revolving body along the axial direction form a tesla valve.
3. The prosthetic heart valve of claim 1, wherein a plurality of flow directing rings are arranged in parallel in the same rotating cavity, the flow directing rings being coaxial with the central axis;
preferably, the diameters of the guide rings are the same in the same rotary cavity.
4. The prosthetic heart valve of claim 1, wherein the deflector ring is secured to the central shaft or hollow solid of revolution by a support.
5. The prosthetic heart valve of claim 4, wherein the support is a rib plate or a support rod.
6. The prosthetic heart valve of claim 1, wherein the hollow revolved body has a diameter that periodically changes in the axial direction, and the diameter of the hollow revolved body located outside the flow guide ring is the largest;
preferably, the hollow revolving body axially changes in a periodic water drop shape, and the hollow revolving body is large in diameter close to the inner side flow guide ring;
preferably, the wall of the hollow revolving body close to the inner side flow guide ring is thinner than the wall of the hollow revolving body far away from the inner side flow guide ring;
preferably, the position of the hollow revolving body with larger diameter is provided with a suture hole;
preferably, the fixed end of the artificial heart valve connected with the heart is a rotary type expansion structure, and a suture hole is designed on the rotary type expansion structure.
7. The prosthetic heart valve of claim 1, wherein the hollow solid of revolution has a radial dimension greater than the central axis and an axial dimension the same as the central axis;
preferably, the deflector rings in adjacent turning cavities have different diameters.
8. The prosthetic heart valve of claim 1, wherein the flow-directing rings in adjacent turning cavities are offset.
9. The heart valve prosthesis according to claim 1, wherein the heart valve prosthesis material is selected from a super-lubricating material or a super-lubricating material coating, preferably a polytetrafluoroethylene super-lubricating coating material, is designed on the surface of each structure of the heart valve prosthesis;
preferably, the prosthetic heart valve axis is straight or curved or the prosthetic heart valve material is bendable.
10. A rotary body tesla valve comprising the prosthetic heart valve of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110630550.1A CN113331998B (en) | 2021-06-07 | Artificial heart valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110630550.1A CN113331998B (en) | 2021-06-07 | Artificial heart valve |
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| Publication Number | Publication Date |
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| CN113331998A true CN113331998A (en) | 2021-09-03 |
| CN113331998B CN113331998B (en) | 2024-04-26 |
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