CN117717438A - Polymer heart valve - Google Patents
Polymer heart valve Download PDFInfo
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- CN117717438A CN117717438A CN202311040880.0A CN202311040880A CN117717438A CN 117717438 A CN117717438 A CN 117717438A CN 202311040880 A CN202311040880 A CN 202311040880A CN 117717438 A CN117717438 A CN 117717438A
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- valve
- valve frame
- frame
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- polymer material
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- 210000003709 heart valve Anatomy 0.000 title claims abstract description 36
- 229920000642 polymer Polymers 0.000 title claims abstract description 19
- 239000002861 polymer material Substances 0.000 claims abstract description 45
- 238000001746 injection moulding Methods 0.000 claims abstract description 13
- -1 styrene-ethylene-butylene-styrene Chemical class 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 26
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 19
- 229920006132 styrene block copolymer Polymers 0.000 claims description 16
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 14
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 14
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 12
- 239000004743 Polypropylene Substances 0.000 claims description 12
- 229920001903 high density polyethylene Polymers 0.000 claims description 12
- 239000004700 high-density polyethylene Substances 0.000 claims description 12
- 229920002530 polyetherether ketone Polymers 0.000 claims description 12
- 229920006324 polyoxymethylene Polymers 0.000 claims description 12
- 230000004323 axial length Effects 0.000 claims description 6
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229930040373 Paraformaldehyde Natural products 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000004432 silane-modified polyurethane Substances 0.000 claims description 3
- 230000001965 increasing effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 210000002837 heart atrium Anatomy 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 208000028831 congenital heart disease Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 208000018578 heart valve disease Diseases 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 230000003319 supportive effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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- Prostheses (AREA)
Abstract
The invention provides a high molecular heart valve. The high polymer heart valve comprises valve leaves and a valve frame, wherein the valve frame is of a hollow columnar structure, a plurality of columnar peaks are arranged at one end of the valve frame at intervals along the circumferential direction, the number of the valve leaves is consistent with that of the columnar peaks, the valve leaves are arranged at the center of one end of the valve frame with the columnar peaks, and the valve leaves are sequentially connected with two adjacent columnar peaks along the circumferential direction; the valve frame comprises an inner layer valve frame and an outer layer valve frame; the valve blades are connected with the inner layer valve frame, the valve blades and the inner layer valve frame are formed by one-time injection molding, and the outer layer valve frame, the valve blades and the inner layer valve frame are formed into a whole by two-time injection molding; the outer layer valve frame is made of a first high polymer material, and the valve blades and the inner layer valve frame are made of a second high polymer material, wherein the hardness of the first high polymer material is greater than that of the second high polymer material. The high polymer heart valve provided by the invention ensures the radial supporting force of the valve frame in a structure optimizing mode, improves the connection performance of the joint of the valve frame and the valve leaflet, and optimizes the valve performance.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a high polymer heart valve.
Background
A heart valve refers to a valve between the atrium and ventricle or between the ventricle and artery. Valves play a key role in the blood circulation activity that the heart never stops: the valve acts as a gate guard, preventing blood from flowing back to the atrium or ventricle just leaving. A prosthetic heart valve is a cardiac implant interventional medical device that treats heart valve disease or defect. The 1960 artificial heart is applied to clinic for the first time, and then undergoes the stages of mechanical valve, biological tissue valve, intervention valve and the like, so that the artificial heart becomes a very important medical instrument in the field of cardiovascular treatment.
Polymeric heart valves are typically comprised of a supportive valve frame and functional valve leaflets. The valve frame mainly plays a supporting role, and needs strong enough radial supporting force and mechanical strength, and the valve leaves play a main switch closing function and need to meet the valve hydrodynamics and valve fatigue requirements.
Patent CN 114126822A discloses a heart valve, in order to improve the radial supporting force of the valve frame, the valve leaflet and the valve frame are made of materials with different hardness, the valve leaflet and the valve frame are bonded into a whole through secondary injection molding, and the valve frame and the valve leaflet have the risk of poor bonding. Meanwhile, the valve leaflet is subjected to the pressure of pulsating blood flow in a human body, the valve leaflet has closing and opening actions, and the joint part of the valve leaflet and the valve frame has a partial area with concentrated stress, and the partial area has the possibility of falling and breakage of the valve leaflet.
Patent CN104780952a discloses a heart valve, the valve frame comprises a frame and a polymer layer covering the frame, the valve leaflet adopts the same polymer material as the polymer layer covering the frame and another polymer material; the valve improves radial support force through the frame, and simultaneously ensures that the polymer layer and the valve leaflet are well combined. However, the frame and the polymer layer are only coated, and the frame and the polymer layer have no binding force, so that stress concentration is easy to generate at the contact place of the frame and the polymer layer, and the risk of damaging the polymer layer in the use process exists, so that the valve has the risk of failure.
Therefore, there is a need to provide a polymeric heart valve that addresses the above-described issues.
Disclosure of Invention
The embodiment of the invention provides a high polymer heart valve, which can ensure the radial supporting force of a valve frame in a structure optimizing mode, improve the connection performance of the joint of the valve frame and valve leaves and optimize the valve performance.
The high polymer heart valve provided by the embodiment of the invention comprises valve leaves and a valve frame, wherein the valve frame is of a hollow columnar structure, a plurality of columnar peaks are arranged at one end of the valve frame at intervals along the circumferential direction, the number of the valve leaves is consistent with that of the columnar peaks, the valve She Shezhi is arranged at the center of one end of the valve frame, which is provided with the columnar peaks, and the plurality of valve leaves are sequentially connected with two adjacent columnar peaks along the circumferential direction; the valve frame comprises an inner valve frame and an outer valve frame; the valve blades are connected with the inner layer valve frame, the valve blades and the inner layer valve frame are formed by one-time injection molding, and the outer layer valve frame, the valve blades and the inner layer valve frame are formed into a whole by two-time injection molding; the outer layer valve frame is made of a first high polymer material, the valve blades and the inner layer valve frame are made of a second high polymer material, and the hardness of the first high polymer material is larger than that of the second high polymer material.
Optionally, the outer layer petal rack has a thickness ranging from 1mm to 2mm, and the inner layer petal rack has a thickness ranging from 0.4mm to 1mm.
Optionally, the thickness of the inner layer of the valve frame is greater than the thickness of the valve leaflet, and the thickness of the valve leaflet ranges from 0.35mm to 0.4mm.
Optionally, the leaflet forms a connecting edge at the junction with the inner layer leaflet frame, the connecting edge having a thickness greater than a thickness of the leaflet.
Optionally, the axial length of the inner layer valve frame is 80% -95% of the axial length of the outer layer valve frame.
Optionally, the outer layer lamella frame inner wall is provided with the dovetail, the inner layer lamella frame outer wall be provided with the dovetail convex rib of dovetail matching, the dovetail is a plurality of, a plurality of the dovetail sets up along circumference interval, the dovetail extends along the axial setting.
Optionally, the thickness of the outer layer valve frame gradually decreases from one end of the valve frame having the peaks to the other end, and the thickness of the inner layer valve frame gradually increases from one end of the valve frame having the peaks to the other end.
Optionally, the outer wall of the inner layer valve frame is wavy, the wavy outer wall of the inner layer valve frame extends along the axial direction, and the inner wall of the outer layer valve frame is wavy matched with the outer wall of the inner layer valve frame.
Optionally, the first polymer material is SEBS styrene-ethylene-butylene-styrene block copolymer, PEEK polyether ether ketone, HDPE high-density polyethylene, PP polypropylene or POM polyoxymethylene; the second high polymer material is SEBS styrene-ethylene-butylene-styrene segmented copolymer, TPU thermoplastic polyurethane or SPU silane modified polyurethane.
Optionally, when the second polymer material is an SEBS styrene-ethylene-butylene-styrene block copolymer, the first polymer material is an SEBS styrene-ethylene-butylene-styrene block copolymer, HDPE high density polyethylene or PP polypropylene; when the second polymer material is TPU thermoplastic polyurethane, the first polymer material is PEEK polyether ether ketone or POM polyformaldehyde.
Optionally, the second polymer material adopts an SEBS styrene-ethylene-butylene-styrene block copolymer with the hardness of 65A-70A, and the first polymer material adopts an SEBS styrene-ethylene-butylene-styrene block copolymer with the hardness of 45A-48A.
Compared with the prior art, the technical scheme of the embodiment of the invention has the beneficial effects.
For example, a structure of an inner layer petal rack and an outer layer petal rack is adopted; the valve leaf and the inner layer valve frame are formed by one-time injection molding, and the outer layer valve frame, the valve leaf and the inner layer valve frame are formed into a whole by two-time injection molding; the valve leaves and the inner layer valve frame are made of a second polymer material; the outer layer valve frame is made of a first high polymer material with higher hardness; the connection between the valve leaves and the valve frame is converted into the connection between the inner valve frame and the outer valve frame, the contact area of the two materials is increased, and the separation of the two polymer materials at the combined part is prevented in the valve frame area; meanwhile, the inner-layer valve frame is the same as the valve She Caizhi, has certain elasticity, and can uniformly distribute stress at the joint of the valve leaflet and the inner-layer valve frame, thereby improving fatigue resistance.
For another example, a structure for increasing the connection performance or a structure for increasing the connection area is arranged at the connection part of the inner layer petal rack and the outer layer petal rack; the connection performance of the inner valve frame and the outer valve frame is improved.
For example, the outer layer valve frame is made of a high polymer material with good surface bonding performance with the inner layer valve frame material and higher hardness, so that the connection performance of the inner layer valve frame and the outer layer valve frame is further improved.
Drawings
Fig. 1 is a front view of a polymeric heart valve in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a polymer heart valve according to an embodiment of the present invention.
Fig. 3 is a top view of a polymeric heart valve in accordance with an embodiment of the present invention.
Fig. 4 is a cross-sectional view of a polymeric heart valve in accordance with an embodiment of the present invention.
Fig. 5 is a schematic structural view of another polymer heart valve according to an embodiment of the present invention.
Fig. 6 is a top view of yet another polymeric heart valve in an embodiment of the present invention.
Fig. 7 is a cross-sectional view of yet another polymeric heart valve in an embodiment of the present invention.
Fig. 8 is a cross-sectional view of another polymeric heart valve in an embodiment of the present invention.
Reference numerals illustrate:
1. the valve frames, 11, the inner valve frames, 12, the outer valve frames, 13, the column peaks, 14, the column valleys, 15, the sewing ring, 111 and the dovetail convex ribs;
2. and (3) valve leaves.
Detailed Description
In order to make the objects, features and advantageous effects of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the following detailed description is merely illustrative of the invention, and not restrictive of the invention. Moreover, the use of the same, similar reference numbers in the figures may indicate the same, similar elements in different embodiments, and descriptions of the same, similar elements in different embodiments, as well as descriptions of prior art elements, features, effects, etc. may be omitted. The axial direction, the radial direction, and the circumferential direction according to the embodiment of the present invention respectively represent the axial direction, the radial direction, and the circumferential direction of the valve frame 1.
Referring to fig. 1 to 8, an embodiment of the present invention provides a polymeric heart valve.
In specific implementation, the high polymer heart valve comprises valve leaves 2 and a valve frame 1, wherein the valve frame 1 is of a hollow columnar structure, a plurality of columnar peaks 13 are arranged at one end of the valve frame 1 at intervals along the circumferential direction, the number of the valve leaves 2 is consistent with that of the columnar peaks 13, the valve leaves 2 are arranged at the center of one end of the valve frame 1 with the columnar peaks 13, and the plurality of valve leaves 2 are sequentially connected with two adjacent columnar peaks 13 along the circumferential direction; the valve frame 1 comprises an inner valve frame 11 and an outer valve frame 12; the valve leaf 2 is connected with the inner valve frame 11, the valve leaf 2 and the inner valve frame 11 are formed by one-time injection molding, and the outer valve frame 12, the valve leaf 2 and the inner valve frame 11 are formed into a whole by two-time injection molding; the outer layer valve frame 12 is made of a first high polymer material, and the valve blades 2 and the inner layer valve frame 11 are made of a second high polymer material, wherein the hardness of the first high polymer material is higher than that of the second high polymer material.
In a specific implementation, the thickness of the outer layer petal rack 12 ranges from 1mm to 2mm, the thickness of the outer layer petal rack 12 is selected according to the hardness of the material, and the greater the hardness of the material of the outer layer petal rack 12, the smaller the thickness of the material is, so that the outer layer petal rack 12 can provide a radial force of more than or equal to 30N. The thickness of the leaflet 2 ranges from 0.35mm to 0.4mm. The thickness of the inner petal rack 11 ranges from 0.4mm to 1mm. The thickness of the inner layer valve frame 11 is larger than that of the valve leaflet 2, which is beneficial to transmitting the highly concentrated stress at the joint with the valve leaflet 2 to the inner layer valve frame 11 and enhancing the fatigue resistance of the valve leaflet 2. The stress at the joint mainly refers to the stress generated when the pressure exerted by blood is transferred to the joint of the valve leaflet 2 and the inner-layer valve frame 11 in the opening and closing process, and the thickness of the inner-layer valve frame 11 is set to be larger than the thickness of the valve leaflet 2 in relation to the design of the valve leaflet 2 and the pressure born by the valve, the load born by the inner-layer valve frame 11 is larger than the load born by the valve leaflet 2, and when the valve leaflet 2 of the valve is stressed, the pressure is transferred to the inner-layer valve frame 11, so that the fatigue resistance of the valve leaflet 2 is enhanced; if the thickness of the inner layer 11 is set to be smaller than the thickness of the leaflet 2, the inner layer 11 may fail before the leaflet 2 breaks.
In one embodiment, the leaflet 2 forms a connecting edge at the junction with the inner layer leaflet frame 11, the thickness of the connecting edge is greater than the thickness of the leaflet 2, and the thickening at the stress concentration further enhances the fatigue resistance of the leaflet. Preferably, the connecting edge is a round angle or chamfer which is arranged at the tail of the leaflet 2 and is connected with the inner-layer valve frame 11, so that the thickness of the connecting part with the inner-layer valve frame 11 is increased, and the reinforcing effect is achieved.
In a specific implementation, the axial length of the inner valve frame 11 is 80% -95% of the axial length of the outer valve frame 12, i.e. the inner valve frame 11 may partially or completely cover the inner side of the outer valve frame 12.
In a specific implementation, the end of the valve frame 1 remote from the leaflet 2 is provided with a slit ring 15.
In a specific implementation, a structure for improving the connection performance or a structure for increasing the connection area is arranged at the connection position of the inner-layer valve frame 11 and the outer-layer valve frame 12 so as to improve the connection performance of the inner-layer valve frame 11 and the outer-layer valve frame 12.
Referring to fig. 2-4, in an embodiment, the inner wall of the outer layer petal frame 12 is provided with a plurality of dovetail ribs 111 matching the dovetail grooves, the plurality of dovetail grooves are circumferentially spaced, the plurality of dovetail grooves are disposed at the positions of the peaks 13 and the positions of the valleys 14 formed by the adjacent peaks 13, and the dovetail grooves extend axially. The cooperation of the dovetail grooves and the dovetail ribs 111 enables the inner-layer petal rack 11 and the outer-layer petal rack 12 to be reliably connected. At this time, the inner valve frame 11 partially covers the inner side of the outer valve frame 12, and the slit ring 15 is formed by the outer valve frame 12 extending outward.
In an embodiment, dovetail ribs are arranged on the inner wall of the outer petal frame 12, dovetail grooves are arranged on the outer wall of the inner petal frame 11, and meanwhile, the thinnest part of the inner petal frame 11 needs to be ensured to be thicker than the thickness of the petals 2.
Referring to fig. 5-7, in one embodiment, the thickness of the outer layer valve frame 12 gradually decreases from one end of the valve frame 1 having the peaks 13 to the other end, and the thickness of the inner layer valve frame 11 gradually increases from one end of the valve frame 1 having the peaks 13 to the other end. Under the condition that the inner diameter and the outer diameter of the valve frame 1 are constant, the outer valve frame 12 and the inner valve frame 11 form an inverted structure, so that the supporting performance of one end of the valve frame 1 where the pillar peak 13 is positioned in the opening process of the valve leaf 2 is ensured, meanwhile, the connecting area of the inner valve frame 11 and the outer valve frame 12 is increased, when the valve leaf 2 is opened, fluid flows from the other end to one end with the pillar peak 13, the inner valve frame 11 and the valve leaf 2 are made of the same material and have smaller hardness, and can be outwards expanded under the action of pressure, and the outer valve frame 12 is made of a material with higher hardness and is not easy to deform, so that the inner valve frame 11 and the outer valve frame 12 are more tightly connected with each other when the fluid pressure is larger, and the connecting reliability of the inner valve frame 11 and the outer valve frame 12 is improved; when the valve leaflet 2 is closed, the fluid has a tendency to flow in the opposite direction compared to the flow when opening, and the end of the valve frame 1 with the peak 13 is stressed much more than when opening, so that the thicker outer layer valve frame material is arranged at the position of the peak, which can provide higher radial strength and prevent deformation. With this structure, the inner flap frame 11 completely covers the inner side of the outer flap frame 12, and the slit ring 15 is formed by extending the inner flap frame 11 to the outside.
Referring to fig. 8, in an embodiment, the outer wall of the inner valve frame 11 has a wave shape, the wave shape of the outer wall of the inner valve frame 11 extends along the axial direction, and the inner wall of the outer valve frame 12 has a wave shape matching the outer wall of the inner valve frame 11. The resistance of separation of the inner valve frame 11 and the outer valve frame 12 is increased, the connection area of the inner valve frame 11 and the outer valve frame 12 is increased, and the connection reliability of the inner valve frame 11 and the outer valve frame 12 is improved. At this time, the inner valve frame 11 completely covers the inner side of the outer valve frame 12, and the slit ring 15 is formed by extending the inner valve frame 11 to the outside.
In a specific implementation, the first high polymer material is SEBS styrene-ethylene-butylene-styrene block copolymer, PEEK polyether ether ketone, HDPE high-density polyethylene, PP polypropylene or POM polyformaldehyde; the second polymer material is SEBS styrene-ethylene-butylene-styrene segmented copolymer, TPU thermoplastic polyurethane or SPU silane modified polyurethane, and the TPU thermoplastic polyurethane comprises polyether polyurethane and polyester polyurethane. The material matching firstly selects a second polymer material meeting the flexibility of the valve leaflet 2, and then matches a first polymer material (an outer layer valve frame 12) which can form good surface combination with the second polymer material (the valve leaflet 2 and the inner layer valve frame 11) and has higher hardness than the second polymer material.
In some embodiments, the second polymeric material is an SEBS styrene-ethylene-butylene-styrene block copolymer and the first polymeric material is an SEBS styrene-ethylene-butylene-styrene block copolymer, HDPE high density polyethylene, or PP polypropylene.
In some embodiments, when the second polymeric material is TPU thermoplastic polyurethane, the first polymeric material is PEEK polyetheretherketone or POM polyoxymethylene.
In one embodiment, the second polymeric material is a SEBS styrene-ethylene-butylene-styrene block copolymer having a hardness of 65A-70A, and the first polymeric material is a SEBS styrene-ethylene-butylene-styrene block copolymer having a hardness of 45A-48A. The first high polymer material and the second high polymer material adopt SEBS styrene-ethylene-butylene-styrene block copolymers with different hardness, the surface bonding bonds of the two are more similar to those of a single material, and the internal lattice orientation is easy to be consistent; the bonding is closer to adopting a single material, and the connection performance is superior.
In summary, the polymer heart valve provided by the invention adopts the structures of the inner valve frame 11 and the outer valve frame 12; the valve leaf 2 and the inner layer valve frame 11 are formed by one-time injection molding, and the outer layer valve frame 12 and the valve leaf 2 and the inner layer valve frame 11 are formed into a whole by two-time injection molding; the valve leaves 2 and the inner valve frame 11 are made of a second polymer material; the outer layer valve frame 12 is made of a first high polymer material with higher hardness; the connection between the valve leaflet 2 and the valve frame 1 is converted into the connection between the inner valve frame 11 and the outer valve frame 12, the contact area of the two materials is increased, and the separation of the two polymer materials at the joint part is prevented in the valve frame 11 area; meanwhile, the inner-layer valve frame 11 and the valve blades 2 are the same in material and have certain elasticity, so that the stress at the joint of the valve blades 2 and the inner-layer valve frame 11 can be uniformly distributed, and the fatigue resistance is improved.
Further, the invention arranges a structure for increasing the connection performance or a structure for increasing the connection area at the connection position of the inner layer petal rack 11 and the outer layer petal rack 12; the connection performance of the inner valve frame 11 and the outer valve frame 12 is improved.
Furthermore, the outer-layer valve frame 12 is made of a high polymer material with good surface bonding performance with the material of the inner-layer valve frame 11 and higher hardness, so that the connection performance of the inner-layer valve frame 11 and the outer-layer valve frame 12 is further improved.
Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure, even where only a single embodiment is described with respect to a particular feature. The characteristic examples provided in the present disclosure are intended to be illustrative, not limiting, unless stated differently. In practice, the features of one or more of the dependent claims may be combined with the features of the independent claims where technically possible, according to the actual needs, and the features from the respective independent claims may be combined in any appropriate way, not merely by the specific combinations enumerated in the claims.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Claims (11)
1. The high polymer heart valve comprises valve leaves and a valve frame, and is characterized in that the valve frame is of a hollow columnar structure, a plurality of columnar peaks are arranged at one end of the valve frame at intervals along the circumferential direction, the number of the valve leaves is consistent with that of the columnar peaks, the valve She Shezhi is arranged at the center of one end of the valve frame, provided with the columnar peaks, of the valve frame, and the plurality of valve leaves are sequentially connected with two adjacent columnar peaks along the circumferential direction; the valve frame comprises an inner valve frame and an outer valve frame; the valve blades are connected with the inner layer valve frame, the valve blades and the inner layer valve frame are formed by one-time injection molding, and the outer layer valve frame, the valve blades and the inner layer valve frame are formed into a whole by two-time injection molding; the outer layer valve frame is made of a first high polymer material, the valve blades and the inner layer valve frame are made of a second high polymer material, and the hardness of the first high polymer material is larger than that of the second high polymer material.
2. The polymeric heart valve of claim 1, wherein the outer layer of valve frames has a thickness in the range of 1mm-2mm and the inner layer of valve frames has a thickness in the range of 0.4mm-1mm.
3. The polymeric heart valve of claim 1, wherein the thickness of the inner layer of the valve frame is greater than the thickness of the leaflet, the thickness of the leaflet ranging from 0.35mm to 0.4mm.
4. The polymeric heart valve of claim 1, wherein the leaflet forms a connecting edge at a junction with the inner layer of the valve frame, the connecting edge having a thickness greater than a thickness of the leaflet.
5. The polymeric heart valve of claim 1, wherein the inner valve frame has an axial length that is 80% -95% of the axial length of the outer valve frame.
6. The polymeric heart valve of claim 1, wherein the outer layer valve frame inner wall is provided with a dovetail groove, the inner layer valve frame outer wall is provided with a dovetail convex rib matched with the dovetail groove, the plurality of dovetail grooves are arranged at intervals along the circumferential direction, and the dovetail grooves extend along the axial direction.
7. The polymeric heart valve of claim 1, wherein the thickness of the outer layer of the valve frame gradually decreases from one end of the valve frame having the peaks to the other end, and the thickness of the inner layer of the valve frame gradually increases from one end of the valve frame having the peaks to the other end.
8. The polymeric heart valve of claim 1, wherein the outer wall of the inner valve frame is undulating, the undulations of the outer wall of the inner valve frame extend axially, and the inner wall of the outer valve frame is undulating to match the outer wall of the inner valve frame.
9. The polymeric heart valve of claim 1, wherein the first polymeric material is SEBS styrene-ethylene-butylene-styrene block copolymer, PEEK polyetheretherketone, HDPE high density polyethylene, PP polypropylene, or POM polyoxymethylene; the second high polymer material is SEBS styrene-ethylene-butylene-styrene segmented copolymer, TPU thermoplastic polyurethane or SPU silane modified polyurethane.
10. The polymeric heart valve of claim 9, wherein when the second polymeric material is an SEBS styrene-ethylene-butylene-styrene block copolymer, the first polymeric material is an SEBS styrene-ethylene-butylene-styrene block copolymer, HDPE high density polyethylene, or PP polypropylene; when the second polymer material is TPU thermoplastic polyurethane, the first polymer material is PEEK polyether ether ketone or POM polyformaldehyde.
11. The polymeric heart valve of claim 10, wherein the second polymeric material is a SEBS styrene-ethylene-butylene-styrene block copolymer having a durometer of 65A-70A and the first polymeric material is a SEBS styrene-ethylene-butylene-styrene block copolymer having a durometer of 45A-48A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311040880.0A CN117717438A (en) | 2023-08-17 | 2023-08-17 | Polymer heart valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311040880.0A CN117717438A (en) | 2023-08-17 | 2023-08-17 | Polymer heart valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117717438A true CN117717438A (en) | 2024-03-19 |
Family
ID=90198539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311040880.0A Pending CN117717438A (en) | 2023-08-17 | 2023-08-17 | Polymer heart valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117717438A (en) |
-
2023
- 2023-08-17 CN CN202311040880.0A patent/CN117717438A/en active Pending
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