Combined artificial heart valve

Abstract

The utility model discloses a combined type artificial heart valve which comprises a fixing assembly and a valve assembly, a fixing ring is arranged on the inner side face of the fixing assembly, the valve assembly is arranged in the fixing assembly through the fixing ring, and a valve piece in the valve assembly swings to achieve opening and closing of a simulated heart valve. The valve assembly comprises a valve ring and a valve piece rotationally arranged in the valve ring, and the valve ring and the fixing ring are detachably installed. By designing the combined artificial heart valve, the valve leaflet assembly and the fixing assembly which are detachably assembled, under the condition that the valve leaflet assembly needs to be replaced due to mechanical failure of the valve leaflet or thrombus generation, opening and closing of the valve leaflet are affected, only the valve leaflet assembly needs to be replaced, the fixing assembly sutured with the human heart does not need to be disassembled, and the human heart tissue is not damaged; and the surgical risk and difficulty are greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to a combined artificial heart valve. Background Art

[0002] When the functional or structural abnormalities of a single or multiple valve structures are caused by organic lesions caused by congenital abnormalities of the human heart or acquired diseases, leading to stenosis and / or insufficiency of the heart valve orifice, heart valve replacement can be used for treatment. However, after heart valve replacement, due to the patient's own anticoagulation failure, blood clots grow near the valve leaflet axis, which restricts the opening and closing of the valve or mechanical failure of the implanted valve leaflet. At the same time, since the existing artificial heart valve structure is an integrated structure, the first implanted heart valve needs to be replaced as a whole during the second operation. However, the second valve replacement operation is difficult and can easily damage the ventricular wall during the operation, leading to fatal heart rupture, which greatly increases the risk of surgery. Utility Model Content

[0003] In order to solve the above problems, the utility model designs a combined artificial heart valve. Through the design of the combined artificial heart valve, the leaflet assembly and the fixed assembly can be disassembled and assembled. When the leaflet opening and closing needs to be replaced due to mechanical failure of the leaflet or thrombus formation, only the leaflet assembly needs to be replaced. There is no need to disassemble the fixed assembly sutured to the human heart, so as not to damage the human heart tissue, thereby greatly reducing the risk and difficulty of surgery.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a combined artificial heart valve, including a fixing component and a valve component, wherein a fixing ring is arranged on the inner side of the fixing component, the valve component is arranged in the fixing component through the fixing ring, and the petals in the valve component swing to realize the opening and closing of the simulated heart valve; the valve component includes a valve ring and petals rotatably arranged in the valve ring, and the valve ring and the fixing ring are detachably installed.

[0005] As a further improvement of the combined artificial heart valve of the utility model: the fixing assembly also includes a petticoat and a sewing ring located at one end of the petticoat, and the fixing ring is located on the inner side of the petticoat; the height of the petticoat is 8mm-10mm.

[0006] As a further improvement of the combined artificial heart valve of the utility model: the suture ring is covered with a multi-layer cloth ring, and the material of the cloth ring is medical polyester cloth.

[0007] As a further improvement of the combined artificial heart valve of the utility model: the inner diameter of the sewing ring is not less than the diameter of the human heart valve.

[0008] As a further improvement of the combined artificial heart valve of the utility model: the fixing component is an inverted hollow truncated cone structure, and the suture ring is arranged on the lower bottom of the fixing component.

[0009] As a further improvement of the combined artificial heart valve of the utility model: the fixing assembly is a hollow cylindrical structure, and the petticoat and the fixing ring are respectively arranged at the two ends of the petticoat.

[0010] As a further improvement of the combined artificial heart valve of the utility model: the outer side surface of the valve ring and the inner side surface of the fixing ring are connected by threads; wherein the outer side surface of the valve ring is an external thread, and the inner side surface of the fixing ring is provided with an internal thread.

[0011] As a further improvement of the combined artificial heart valve of the utility model: the outer side surface of the valve ring and the inner side surface of the fixing ring are connected by a buckle.

[0012] As a further improvement of the combined artificial heart valve of the utility model: an arc-shaped limiting protrusion is arranged on the outer side surface of the valve ring, and a groove corresponding to the position of the protrusion is arranged on the inner side surface of the fixing ring.

[0013] As a further improvement of the combined artificial heart valve of the utility model: a wedge-shaped groove is provided on the inner side surface of the fixing ring along its height direction, the depth of the wedge-shaped groove gradually decreases from top to bottom, and an arc-shaped groove is provided at the lower end of the wedge-shaped groove; a wedge body is provided on the outer side surface of the valve ring for use with the wedge-shaped groove, and a spherical protrusion is provided on the lower end of the wedge body for use with the arc-shaped groove; the height of the spherical protrusion is smaller than the highest point of the wedge body; the bottom of the wedge-shaped groove is an arc-shaped structure.

[0014] Beneficial Effects

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] First, in the combined artificial heart valve described in the utility model, the valve assembly composed of the leaflets and the leaflet axis can be detachably installed with the fixing assembly sutured and fixed to the human body, specifically by bolting or snapping the valve ring in the valve assembly to the fixing ring. During the secondary operation, it is only necessary to rotate the valve assembly to remove it and replace it with a new one, without disassembling the external suture ring, which greatly improves the operation efficiency and reduces the operation risk.

[0017] Second, in the combined artificial heart valve described in the utility model, the inner diameter of the suture ring, that is, the smallest diameter of the device, is not less than the diameter of the human heart valve, thereby reducing the transvalvular pressure difference and effectively solving the problem that after the existing artificial heart valve implantation, the transvalvular pressure difference is large because the valve ring diameter is smaller than the diameter of the human heart valve, making the artificial heart valve unable to meet the patient's physiological needs; at the same time, reducing the transvalvular pressure difference can effectively curb the formation of thrombus at the artificial heart valve, which can not only prolong the service life of the artificial heart valve but also reduce the complications caused by thrombus in patients after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the artificial heart valve described in Example 1;

[0019] Figure 2 is a cross-sectional schematic diagram of the artificial heart valve described in Example 1;

[0020] Figure 3 is a schematic structural diagram of the artificial heart valve described in Example 3;

[0021] Figure 4 It is a schematic diagram of the structure of the valve ring and the fixing ring part of the artificial heart valve described in Example 4; the markings in the figure are: 1, fixing assembly, 101, petticoat, 102, suture ring, 103, fixing ring, 2, valve assembly, 201, valve ring, 202, flap, 301 wedge-shaped groove, 302, arc-shaped groove, 303, wedge, 304, spherical protrusion. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides a detailed implementation method.

[0023] Example 1

[0024] The inventive concept of the combined artificial heart valve described in this embodiment is based on the existing artificial heart valve leaflets and the fixed ring 103 as one non-detachable structure. Some patients need to remove the original artificial valve and replace it with a new valve device when they encounter mechanical failure of the valve device or thrombosis and affect normal use. Under this background, disassembly and assembly are very likely to damage the ventricular wall, leading to fatal heart rupture, greatly increasing the risk of surgery. In order to solve such problems, this embodiment designs a set of detachable artificial heart valves. In the prior art, the working method of the leaflets installed between the leaflets and the fixed ring 103, that is, in the field of artificial heart valves, has become mature, so the utility model no longer elaborates on the structure of the leaflets, but only explains the combined structure of the combined artificial heart valve.

[0025] The combined artificial heart valve described in the utility model comprises a fixing component 1 and a valve component 2, wherein the fixing component 1 comprises a petticoat 101, a suture ring 102 arranged at one end of the petticoat 101, and a fixing ring 103 located on the inner side of the petticoat 101, the suture ring 102 is wrapped with a multi-layer cloth ring, the cloth ring material is medical polyester cloth, and is used to suture the device with human heart tissue to fix the device at the heart valve. The valve component 2 comprises a valve ring 201 and a flap 202 rotatably arranged in the valve ring 201, the valve ring 201 and the fixing ring 103 are detachably installed, in this embodiment, the valve ring 201 is connected to the fixing ring 103 by a thread, specifically, the outer side of the valve ring 201 is an external thread, the inner side of the fixing ring 103 is provided with an internal thread, and the thread engagement lengths of the internal and external threads are the same. The valve component 2 is fixed in the fixing ring 103 by a threaded connection. The fixing ring 103 is designed as an integral part with the sewing ring 102 or the petticoat 101. Through this structural design, the valve component 2 can be detachably installed in the fixing component 1. In the event of a mechanical failure of the leaflet or a thrombus is generated at the leaflet axis, which affects the opening and closing of the leaflet, it is only necessary to replace the leaflet component through an interventional surgery.

[0026] The height of the petticoat 101 of the combined artificial heart valve described in this embodiment is 8mm-10mm, and the fixing component 1 is an inverted hollow truncated cone structure, the sewing ring 102 is arranged at the bottom of the fixing component 1, and the inner diameter of the sewing ring 102 is the same as or larger than the diameter of the human heart valve; in the height direction of the fixing component 1, the fixing ring 103 is arranged inside the petticoat 101, that is, the valve component 2 is installed in place, the upper end surface of the valve component 2 is located inside the petticoat 101, and its upper opening expansion design is conducive to collecting and guiding the blood pumping direction. At the same time, the above design can effectively reduce the transvalvular pressure difference, and effectively solve the problem that the transvalvular pressure difference is large after the existing artificial heart valve implantation because the diameter of the valve ring 201 is smaller than the diameter of the human heart valve, so that the artificial heart valve cannot meet the patient's physiological needs; at the same time, reducing the transvalvular pressure difference can effectively curb the generation of thrombus at the artificial heart valve, which can not only increase the service life of the artificial heart valve but also reduce the complications caused by thrombus after surgery.

[0027] Example 2

[0028] The specific structure of the combined artificial heart valve described in this embodiment is basically the same as the specific structure of the combined artificial heart valve described in Example 1, with the difference being that the outer side surface of the valve ring 201 and the inner side surface of the fixing ring 103 are connected by a snap fastener. Specifically, the outer side surface of the valve ring 201 is provided with an arc-shaped limiting protrusion, and the inner side surface of the fixing ring 103 is provided with a groove corresponding to the position of the protrusion.

[0029] The valve component 2 is fixed to the fixing component 1 by the cooperation of the protrusion and the groove. In this embodiment, the valve component 2 is fixed to the upper end surface of the petticoat 101, which is more conducive to the rapid replacement of the valve component 2 during the secondary operation.

[0030] Example 3

[0031] The specific structure of the combined artificial heart valve described in this embodiment is basically the same as the specific structure of the combined artificial heart valve described in Example 1, with the difference being that: the fixing assembly 1 is a hollow cylindrical structure, and the petticoat 101 and the fixing ring 103 are respectively arranged at the two ends of the petticoat 101; the valve ring 201 is fixed in the petticoat 101 through its outer thread and the inner thread of the fixing ring 103.

[0032] Example 4

[0033] The specific structure of the combined artificial heart valve described in this embodiment is basically the same as the specific structure of the combined artificial heart valve described in Example 3, and the difference lies in that: the installation and fixing methods of the valve ring 201 and the fixing ring 103 are different. Specifically, the inner side surface of the fixing ring 103 is provided with a wedge-shaped groove 301 along its height direction, and the depth of the wedge-shaped groove 301 gradually decreases from top to bottom, and an arc-shaped groove 302 is provided at the lower end of the wedge-shaped groove 301; the outer side surface of the valve ring 201 is provided with a wedge body 303 used in conjunction with the wedge-shaped groove 301, and the lower end of the wedge body 303 is provided with a spherical protrusion 304 that cooperates with the arc-shaped groove 302; the height of the spherical protrusion 304 is smaller than the highest point of the wedge body 303; the bottom of the wedge-shaped groove 301 is an arc-shaped structure. The valve ring 201 is fixed to the fixing ring 103 by the cooperation of the arc groove 302 and the spherical protrusion 304; the wedge-shaped groove 301 is designed to provide space for the movement of the spherical protrusion 304. After the spherical protrusion 304 is stuck in the arc groove 302 to fix the valve ring 201, its wedge 303 is automatically filled into the wedge-shaped groove 301, so that the valve ring 201 and the fixing ring 103 are relatively sealed to avoid blood retention and thrombosis.

[0034] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A combined artificial heart valve, comprising a fixing component (1) and a valve component (2), wherein a fixing ring (103) is arranged on the inner side of the fixing component (1), the valve component (2) is arranged in the fixing component (1) via the fixing ring (103), and the flaps (202) in the valve component (2) swing to simulate the opening and closing of a heart valve; characterized in that: The valve assembly (2) comprises a valve ring (201) and a valve leaf (202) rotatably disposed in the valve ring (201); the valve ring (201) and the fixing ring (103) are detachably mounted.

2. A combined artificial heart valve according to claim 1, characterized in that: The fixing assembly (1) further comprises a petticoat (101) and a sewing ring (102) located at one end of the petticoat (101), and the fixing ring (103) is located on the inner side of the petticoat (101); the height of the petticoat (101) is 8 mm-10 mm.

3. A combined artificial heart valve according to claim 2, characterized in that: The fixing component (1) is in the form of an inverted hollow truncated cone structure, and the sewing ring (102) is arranged on the lower bottom of the fixing component (1).

4. A combined artificial heart valve according to claim 2, characterized in that: The fixing assembly (1) is a hollow cylindrical structure, and the petticoat (101) and the fixing ring (103) are respectively arranged at two ends of the petticoat (101).

5. A combined artificial heart valve according to claim 3 or 4, characterized in that: The suture ring (102) is covered with a multi-layer cloth ring, and the cloth ring is made of medical polyester cloth.

6. A combined artificial heart valve according to claim 5, characterized in that: The inner diameter of the sewing ring (102) is not less than the diameter of a human heart valve.

7. A combined artificial heart valve according to claim 6, characterized in that: The outer side surface of the valve ring (201) and the inner side surface of the fixing ring (103) are connected via threads; the outer side surface of the valve ring (201) is an external thread, and the inner side surface of the fixing ring (103) is provided with an internal thread.

8. The combined artificial heart valve according to claim 6, characterized in that: The outer side surface of the valve ring (201) and the inner side surface of the fixing ring (103) are connected via a buckle.

9. A combined artificial heart valve according to claim 8, characterized in that: The outer side surface of the petal ring (201) is provided with an arc-shaped limiting protrusion, and the inner side surface of the fixing ring (103) is provided with a groove corresponding to the position of the protrusion.

10. The combined artificial heart valve according to claim 9, characterized in that: The inner side surface of the fixing ring (103) is provided with a wedge-shaped groove (301) along its height direction, the depth of the wedge-shaped groove (301) gradually decreases from top to bottom, and an arc-shaped groove (302) is provided at the lower end of the wedge-shaped groove (301); the outer side surface of the petal ring (201) is provided with a wedge body (303) used in conjunction with the wedge-shaped groove (301), and the lower end of the wedge body (303) is provided with a spherical protrusion (304) that cooperates with the arc-shaped groove (302); the height of the spherical protrusion (304) is smaller than the highest point of the wedge body (303); and the bottom of the wedge-shaped groove (301) is an arc-shaped structure.

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