A heart valve

Abstract

The application relates to a heart valve, relates to the field of medical devices, and comprises a valve frame and two mutually connected valve bodies located inside the valve frame, the valve bodies comprising a connecting edge for connecting with the valve frame and a movable edge for adjusting the opening and closing of the inner cavity of the valve frame, the valve frame comprising two oppositely arranged convex sections and two oppositely arranged concave sections, each movable edge comprising two crest portions and a trough portion located between the two crest portions, and the end of each crest portion away from the trough portion being connected with the connecting edge, each convex section being correspondingly arranged with the crest portion in one of the valve bodies, and each concave section being correspondingly arranged with the trough portion in one of the valve bodies. The application has the effect of reducing the occurrence of the situation that the valve blocks the coronary orifice.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to a heart valve. Background Technology

[0002] Minimally invasive aortic valve replacement surgery requires making a small incision in one of the patient's blood vessels (such as the thigh), extending a catheter from that point to a suitable position in the heart, and then releasing and fixing the interventional valve in the original valve position to replace the original valve function.

[0003] Figure 1 This is a schematic cross-sectional view of the anatomy and major blood vessels of the heart 10. Deoxygenated blood is delivered to the right atrium 12 via the superior vena cava 14 and inferior vena cava 16. Blood flows from the right atrium 12 into the right ventricle 18 through the tricuspid valve 20. Contraction of the right ventricle 18 drives this blood through the pulmonary valve (not shown) and into the pulmonary artery (not shown). Pulmonary circulation carries blood to the lungs for gas exchange of oxygen. Circulatory pressure causes oxygenated blood to return to the heart via the pulmonary vein 22 and enter the left atrium 24. When the left atrium 24 is full, the mitral valve 26 opens to allow blood to be drawn into the left ventricle 28. Contraction of the left ventricle 28 expels blood through the aortic valve 30 and into the aorta 32. The arteries of the systemic circulation carry blood to the capillary beds of the body tissues. The veins of the systemic circulation collect blood from the capillary beds and return it to the right atrium 12, completing the circulation of the circulatory system. When the heart 10 fails to continuously produce normal flow and pressure, a condition commonly known as heart failure occurs.

[0004] There are two coronary arteries near the aortic valve 30 in the aortic 32. When the aortic valve 30 is closed, some of the blood in the aortic 32 enters the coronary arteries to supply blood to the heart. The circumferential angle between the two coronary arteries along the cross-section of the aortic 32 is approximately 120°.

[0005] During minimally invasive valve implantation surgery, the patient lies face up on the operating table. X-rays are used to irradiate the area, and the table is adjusted to ensure the two coronary arteries are symmetrically positioned on either side of the X-ray beam. The valve placement is then observed. If the portion of the valve extending into the aorta is too short, most of the valve lies within the left ventricle, affecting blood supply. Therefore, X-ray imaging is needed to determine the appropriate length of the valve extending into the aorta. However, current X-ray imaging only displays a planar view, not a three-dimensional one. Therefore, existing tricuspid valves appear as cuboids, making it impossible to determine the circumferential position of the valve, potentially leading to obstruction of the coronary artery ostium.

[0006] While observing for ventricular fibrillation after valve implantation can help determine if the valve is obstructing the coronary artery ostium, ventricular fibrillation itself causes irreversible damage to the heart. Furthermore, after ventricular fibrillation occurs, the valve needs to be pulled back into the artery, rotated, and then repositioned. This process can damage the valve and makes it difficult to determine the rotation angle for proper repositioning, potentially leading to coronary artery blockage. Surgical procedures, with their invasive incisions, allow for direct determination of valve location and placement, eliminating the need to consider coronary artery obstruction.

[0007] Regarding the aforementioned technologies, the inventors believe that there is a defect where the valve blocks the coronary artery ostium. Utility Model Content

[0008] To reduce the occurrence of valve obstruction of the coronary artery orifice, this application provides a heart valve.

[0009] The heart valve provided in this application adopts the following technical solution: A heart valve includes a valve frame and two interconnected valve bodies located inside the valve frame. Each valve body includes a connecting edge for connecting to the valve frame and a movable edge for adjusting the opening and closing of the valve frame lumen. The valve frame includes two oppositely arranged protruding sections and two oppositely arranged recessed sections. Each movable edge includes two crest portions and a trough portion located between the two crest portions. The end of each crest portion away from the trough portion is connected to the connecting edge. Each protruding section corresponds to a crest portion in one of the valve bodies, and each recessed section corresponds to a trough portion in one of the valve bodies.

[0010] By adopting the above technical solution, after the valve is placed in the human heart, the relative position between the two protruding segments of the valve frame and the coronary artery can be directly observed through imaging equipment. This allows the position of the crest of the valve leaflet to be determined, ensuring that the crest of the valve leaflet is misaligned with the coronary artery after the valve is placed through minimally invasive surgery. This reduces the possibility of the valve obstructing the coronary artery orifice and achieves accurate valve installation.

[0011] Preferably, the valve body and the valve frame are sutured together.

[0012] Preferably, the outer wall of the valve frame is sutured with a covering that fits over the valve frame.

[0013] By adopting the above technical solution, the membrane replaces the valve frame in contact with human tissue, reducing the occurrence of damage to human tissue caused by direct contact between the valve frame and human tissue. In addition, the membrane can easily adhere tightly to human tissue, reducing the occurrence of blood leakage from the outside of the heart valve.

[0014] Preferably, the membrane is a pericardial tissue or an elastic membrane made of synthetic material.

[0015] By adopting the above technical solution, the film can be well adapted to the human body.

[0016] Preferably, the coating has a protrusion corresponding to the crest portion and a concave portion corresponding to the trough portion.

[0017] By adopting the above technical solution, the occurrence of obstruction of the coronary artery ostium by the covering is reduced.

[0018] Preferably, the valve frame further includes two support segments, each of which is connected between two adjacent protrusion segments, and the two support segments gradually tilt towards each other in a direction away from the valve body.

[0019] By adopting the above technical solution, the support section supports the protruding section, thereby strengthening the protruding section.

[0020] Preferably, the curvature of the crest portion of the valve body is less than the curvature of the trough portion.

[0021] By adopting the above technical solution, after the leaflets seal the inner cavity of the valve frame, the overlap between the leaflets is small, which improves the service life of the leaflets.

[0022] Preferably, the thickness of the two ends of the two valve bodies at the circumferential position where they connect with the valve frame is twice the thickness of the valve body.

[0023] By adopting the above technical solutions, the stability of the connection between the leaflets and the valve frame is improved.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. Reduce the occurrence of valve obstruction of the coronary artery ostium, and achieve accurate valve installation; 2. It reduces the likelihood of the valve frame directly contacting human tissue and causing damage, while also reducing the possibility of blood leakage from the outside of the heart valve. Attached Figure Description

[0025] Figure 1 This is a schematic diagram illustrating the structure of the heart.

[0026] Figure 2 This is a schematic diagram illustrating the overall structure of the heart valve in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram illustrating the valve body, the convex segment, and the concave segment in an embodiment of this application.

[0028] Figure 4 This is a schematic diagram illustrating the position of the valve holder and coronary artery in an embodiment of this application.

[0029] Figure labeling: 10. Heart; 12. Right atrium; 14. Superior vena cava; 16. Inferior vena cava; 18. Right ventricle; 20. Tricuspid valve; 22. Pulmonary vein; 24. Left atrium; 26. Mitral valve; 28. Left ventricle; 30. Aortic valve; 32. Aorta; 33. Coronary artery; 4. Valve frame; 41. Protruding segment; 42. Concave segment; 43. Supporting segment; 431. Opening; 5. Valve body; 51. Connecting edge; 511. Axial suture portion; 512. Circumferential suture portion; 52. Live edge; 521. Crest portion; 522. Trough portion; 6. Cover; 61. Protrusion; 62. Concavity. Detailed Implementation

[0030] The following is in conjunction with the appendix Figures 2-4 This application will be described in further detail.

[0031] Example 1 This application discloses a heart valve. (Refer to...) Figure 2 and Figure 3 The heart valve includes a valve frame 4, a valve body 5 located inside the valve frame 4, and a covering 6 sleeved on the outside of the valve frame 4. There are two valve bodies 5, which are arranged around the circumference of the valve frame 4.

[0032] Each valve body 5 includes a connecting edge 51 and a movable edge 52. The connecting edge 51 is used to connect with the valve frame 4, and the movable edge 52 moves to open or close the inner cavity enclosed by the valve frame 4. The movable edge 52 includes a crest portion 521 and a trough portion 522; the trough portion 522 is located between the two crest portions 521, and the ends of the two crest portions 521 away from the trough portion 522 are connected to the connecting edge 51. The connecting edge 51 is sutured to the valve frame 4 to ensure a tight seal at the connection between the valve body 5 and the valve frame 4.

[0033] When blood in the left ventricle enters the aorta, the left ventricle contracts, and the blood causes the two valve bodies 5 to open. The two valve bodies 5 then cause the two movable edges 52 to move in opposite directions, thus opening the passage.

[0034] When blood flows from the aorta into the left ventricle, the left ventricle relaxes. The blood causes the two valve bodies 5 to move to the closed state. A small amount of blood causes the two valve bodies 5 to close. The two valve bodies 5 cause the two movable edges 52 to move in a direction that brings them closer to each other, thus closing the passage and preventing a large amount of blood from the aorta from flowing into the left ventricle.

[0035] The overall shape of the connecting edge 51 and the shape of the live edge 52 are both axially corresponding to the valve frame 4. The connecting edge 51 includes a circumferential suture portion 512 and two axial suture portions 511. The two axial suture portions 511 are located at the two ends of the circumferential suture portion 512. The axial suture portions 511 are located at the crest of the connecting edge 51, and the circumferential suture portion 512 is the trough of the connecting edge 51.

[0036] To facilitate the movement of each movable edge 52 toward each other and thus close, the curvature of the crest portion 521 of the movable edge 52 of the valve body 5 is less than the curvature of the trough portion 522, thereby facilitating the trough portions 522 of the valve body 5 to move toward each other.

[0037] The petal frame 4 is made of human memory alloy. The petal frame 4 includes a raised section 41 and a recessed section 42. The raised section 41 is corresponding to the crest portion 521, and the recessed section 42 is corresponding to the trough portion 522.

[0038] Reference Figure 3 and Figure 4 Using this valve structure, the upper end of the valve frame 4 appears as an inverted V-shape on X-rays. X-ray imaging can be used to determine the circumferential position of the valve body 5, ensuring the correct placement of the valve. The peak portion 521 of the valve body 5 is offset from the position of the coronary artery 33, reducing the possibility of blood being blocked from entering the coronary artery 33 after the valve body 5 closes its passage. For ease of display in the attached figure, the sharpness of the protruding section 41 of the valve frame 4 has been increased. In actual design, the protruding section 41 of the valve frame 4 should be kept as smooth as possible while ensuring imaging.

[0039] Reference Figure 2 and Figure 4 To facilitate the connection between the valve body 5 and the valve frame 4 and to improve the stability of the connection, the valve body 5 is folded and then connected to the valve frame 4, such that the thickness of the two ends of the valve body 5 at the circumferential position where it connects to the valve frame 4 is twice the thickness of the valve body 5. The valve body 5 is a biological valve body 5, which has good compatibility with the human body.

[0040] To enhance the strength of the raised section 41 of the valve frame 4, the valve frame 4 also includes two support sections 43, which are arranged opposite each other and each support section 43 serves to connect two adjacent raised sections 41. Each support section 43 is inclined towards the raised section 41, meaning that the two support sections 43 gradually incline towards each other from the direction away from the valve body. Thus, the upper end of the valve frame 4 still appears as an inverted V-shape on X-ray imaging.

[0041] Each support segment 43 corresponds to a recessed segment 42, and each support segment 43 and the corresponding recessed segment 42 form an opening 431, each opening 431 being used to align with a corresponding coronary artery 33.

[0042] Reference Figure 2 and Figure 3 The diaphragm 6 is made of elastic material and is located near the valve body on the valve frame. The diaphragm 6 is sutured to the outer wall of the valve frame. The material of the diaphragm 6 is pericardial tissue or a synthetic material. After the heart valve is installed, the diaphragm 6 comes into contact with human tissue, reducing the possibility of the valve frame directly contacting human tissue and causing abrasions. At the same time, the diaphragm 6 can fit more closely to the human body, reducing the possibility of blood leakage from the outside of the heart valve. The diaphragm 6 has two protrusions 61 and two concave portions 62. The protrusions 61 correspond to the crests 521, and the concave portions 62 correspond to the troughs 522.

[0043] The implementation principle of a heart valve according to an embodiment of this application is as follows: the patient is irradiated with X-ray, and then the angle is adjusted so that the coronary arteries 33 of the patient's heart are displayed symmetrically on the display device. After the valve is moved to the heart through the artery, the valve frame 4 is rotated appropriately to offset the position of the protrusion of the valve frame 4 from the position of the coronary arteries 33.

[0044] At this time, the upper part of the valve frame 4 should be an inverted V structure, and the highest point of the valve frame 4 should be located in the middle area between the two coronary arteries 33. At this time, each opening 431 is aligned with the corresponding coronary artery 33, and the axial suture portion 511 of the valve body 5 is staggered with the position of the coronary artery 33 to reduce the occurrence of the valve body 5 blocking the coronary artery 33.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heart valve, characterized in that: The valve includes a valve frame (4) and two interconnected valve bodies (5) located inside the valve frame (4). Each valve body (5) includes a connecting edge (51) for connecting with the valve frame (4) and a movable edge (52) for adjusting the opening and closing of the valve frame (4). The valve frame (4) includes two oppositely arranged protruding sections (41) and two oppositely arranged recessed sections (42). Each movable edge (52) includes two crests (521) and a trough (522) located between the two crests (521). The end of each crest (521) away from the trough (522) is connected to the connecting edge (51). Each protruding section (41) corresponds to a crest (521) in one of the valve bodies (5), and each recessed section (42) corresponds to a trough (522) in one of the valve bodies (5).

2. A heart valve according to claim 1, characterized in that: The valve body (5) and the valve frame (4) are sutured together.

3. A heart valve according to claim 1, characterized in that: The outer wall of the valve frame (4) is sutured with a covering membrane (6) that fits onto the valve frame (4).

4. A heart valve according to claim 3, characterized in that: The membrane (6) is an elastic membrane (6) made of pericardial tissue or synthetic material.

5. A heart valve according to claim 3, characterized in that: The coating (6) has a protrusion (61) corresponding to the crest portion (521) and a recess (62) corresponding to the trough portion (522).

6. A heart valve according to claim 1, characterized in that: The valve frame (4) also includes two support segments (43), each of which is connected between two adjacent protrusion segments (41). The two support segments (43) gradually tilt towards each other in a direction away from the valve body (5).

7. A heart valve according to claim 1, characterized in that: The curvature of the crest portion (521) of the valve body (5) is less than the curvature of the trough portion (522).

8. A heart valve according to claim 1, characterized in that: The thickness of the two ends of the two valve bodies (5) connected to the valve frame (4) in the circumferential direction is twice the thickness of the valve body (5).

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