A mitral valve repair device and repair system

Abstract

This invention belongs to the field of medical device technology and discloses a mitral valve repair device and system. The mitral valve repair device includes a first anchor and a second anchor. The first anchor is provided with a first magnetic attraction element and is used to fix the anterior leaflet of the mitral valve. The second anchor is provided with a second magnetic attraction element and is used to fix the posterior leaflet of the mitral valve. The first and second anchors are configured such that: during cardiac systole, the first and second anchors attract each other to completely close the anterior and posterior leaflets of the mitral valve; during cardiac diastole, the first and second anchors separate under the impact of blood flow to separate the anterior and posterior leaflets of the mitral valve. The mitral valve repair device effectively reduces systolic regurgitation, maximizes the preservation of the diastolic valve opening area, avoids mitral stenosis, and prevents tearing of the anterior and posterior leaflets of the mitral valve. It has a wider range of applications, is less invasive, easier to operate, and reduces long-term risks.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a mitral valve repair device and repair system. Background Technology

[0002] Mitral regurgitation (MR) is one of the most common valvular heart diseases, caused by organic or functional changes in the mitral valve leaflets, annulus, papillary muscles, and chordae tendineae, leading to poor occlusion of the anterior and posterior leaflets. The overall prevalence of mitral regurgitation is high, and it is often accompanied by heart failure, arrhythmias, and venous hypertension, severely impacting patients' quality of life.

[0003] Currently, the main treatments for mitral regurgitation include medication, traditional surgery, and interventional therapy. Medication cannot cure valvular disease; surgery, namely valve repair or replacement, is considered the standard treatment, but it involves significant trauma and a long recovery period, posing higher risks to elderly patients, those with poor cardiac function, or those with multiple comorbidities. Many patients cannot tolerate open-heart surgery and therefore cannot undergo surgical treatment. Transcatheter edge-to-edge repair (TEER) is currently the most mature and widely used interventional treatment for mitral regurgitation. Its core technique involves clamping the two leaflets of the mitral valve with clips. During diastole, the unclamped portion remains open, creating a double-hole opening without affecting the valve's diastolic function.

[0004] However, existing TEER technology still has the following shortcomings: The orifice area is reduced. TEER clamps the anterior and posterior leaflets of the mitral valve together at the regurgitation position using a clamping device, forming a "double-aperture" structure. However, the presence of the clamping device fixes part of the leaflet, inevitably causing a reduction in the orifice area of ​​the mitral valve, which easily leads to mitral stenosis.

[0005] It has high requirements for valve anatomy. TEER is not suitable for conditions such as wide leaflet prolapse, leaflet perforation, severe leaflet calcification, or excessively short posterior leaflet.

[0006] There are long-term device-related risks. There is a risk of clip dislodgement after TEER, and the continuous tension exerted on the leaflets by the clip during diastole may lead to leaflet tearing. Furthermore, if mitral valve replacement is required, the large clip can hinder the surgeon's operation, and the replacement process requires tearing open the already clipped leaflets, significantly increasing both the complexity and risk of the surgery. In addition, TEER alters the original geometry of the mitral valve and the left ventricular blood flow pattern, posing a risk of thrombosis. Summary of the Invention

[0007] The purpose of this invention is to provide a mitral valve repair device and repair system. The mitral valve repair device can effectively reduce regurgitation while preserving the valve orifice area to the maximum extent. It is also less invasive, easier to operate, reduces long-term risks, and has a wider range of applications.

[0008] To achieve this objective, the present invention adopts the following technical solution: On the one hand, a mitral valve repair device is provided, comprising: A first anchor plate, wherein a first magnetic attraction element is provided on the first anchor plate, and the first anchor plate is used to fix to the anterior leaflet of the mitral valve; The second anchor plate is provided with a second magnetic attraction element and is used to fix the second anchor plate to the posterior leaflet of the mitral valve. The first anchor and the second anchor are configured such that during cardiac systole, the first anchor and the second anchor attract each other to completely close the anterior and posterior leaflets of the mitral valve; and during cardiac diastole, the first anchor and the second anchor separate under the impact of blood flow to separate the anterior and posterior leaflets of the mitral valve.

[0009] Optionally, both the first magnetic attractor and the second magnetic attractor are magnets and attract each other; or, one of the first magnetic attractor and the second magnetic attractor is a magnet and the other is a magnetic conductor.

[0010] Optionally, the magnetic attraction force between the first magnetic element and the second magnetic element ranges from 0.2N to 10N; and / or, Both the first anchor plate and the second anchor plate are provided in at least two pairs, and are provided in a one-to-one correspondence.

[0011] Optionally, the mitral valve repair device further includes a suture, wherein the first anchor is sutured to the anterior leaflet of the mitral valve via the suture, and the second anchor is sutured to the posterior leaflet of the mitral valve via the suture.

[0012] Optionally, the first anchor plate includes a first piece and a second piece, which are respectively disposed on opposite sides of the anterior leaflet of the mitral valve, and the suture thread sutures the first piece and the second piece to the anterior leaflet of the mitral valve.

[0013] Optionally, both the first and second pieces are provided with barbs on the side facing the anterior leaflet of the mitral valve.

[0014] Optionally, the barbs on the first piece and the barbs on the second piece are symmetrically arranged with respect to the anterior leaflet of the mitral valve.

[0015] Optionally, the first anchor plate is bonded to the anterior leaflet of the mitral valve, and the second anchor plate is bonded to the posterior leaflet of the mitral valve; or, The mitral valve repair device further includes two fixing clips. The first anchor plate is fixed to the anterior leaflet of the mitral valve by one of the fixing clips, and the second anchor plate is fixed to the posterior leaflet of the mitral valve by the other fixing clip; or, Both the first anchor plate and the second anchor plate include magnetofluid. The first anchor plate is used for injection into the anterior leaflet of the mitral valve, and the second anchor plate is used for injection into the posterior leaflet of the mitral valve.

[0016] Optionally, both the first anchor plate and the second anchor plate are provided with positioning elements; and / or, Both the first anchor plate and the second anchor plate are covered with a covering layer.

[0017] On the other hand, a mitral valve repair system is provided, including a delivery device and the aforementioned mitral valve repair device, wherein the delivery device delivers the first anchor plate to the anterior leaflet of the mitral valve and the delivery device delivers the second anchor plate to the posterior leaflet of the mitral valve.

[0018] The beneficial effects of this invention are: This invention provides a mitral valve repair device and system. The mitral valve repair device includes a first anchor and a second anchor. The first anchor has a first magnetic attraction element and is used to fix the anterior leaflet of the mitral valve. The second anchor has a second magnetic attraction element and is used to fix the posterior leaflet of the mitral valve. The first and second anchors are configured such that: during cardiac systole, the left ventricular pressure rises sharply, pushing the anterior and posterior leaflets of the mitral valve closer together; the first and second anchors then attract each other, causing the anterior and posterior leaflets of the mitral valve to close completely; during cardiac diastole, the first and second anchors separate under the impact of blood flow, and the magnetic attraction between the first and second anchors decreases rapidly with increasing distance, thus separating the anterior and posterior leaflets of the mitral valve.

[0019] The mitral valve repair device of this invention uses the attraction between the first and second anchors during cardiac systole to ensure mutual attraction, assisting in the complete closure of the anterior and posterior leaflets of the mitral valve, thereby reducing regurgitation. During cardiac diastole, the first and second anchors can separate under the impact of blood flow, allowing the mitral valve orifice to open normally. This mitral valve repair device achieves dynamic and reversible separation of the anterior and posterior leaflets of the mitral valve, effectively reducing systolic regurgitation while maximizing the preservation of the diastolic valve orifice opening area, fundamentally preventing iatrogenic mitral stenosis. Furthermore, during cardiac diastole, the first and second anchors separate under the impact of blood flow, preventing continuous tension on the anterior and posterior leaflets and thus avoiding tearing. No rigid connection is required between the first and second anchors, making embolism unlikely even if they fail.

[0020] The mitral valve repair device of this invention utilizes magnetic attraction to assist the closure of the anterior and posterior mitral valve leaflets through a first and second anchor plate. It is independent of the specific shape and thickness of the anterior and posterior mitral valve leaflets, exhibiting greater adaptability to valve leaflet anatomy and a wider range of applications. Furthermore, postoperatively, under non-invasive conditions, the magnetic attraction force can be adjusted, and even the magnetic pole direction can be switched, by driving the first and second magnetic attraction components with an external magnetic field. The treatment intensity can be individually adjusted according to the patient's postoperative recovery: initially, a stronger magnetic attraction force can be set to fully correct regurgitation; after the anterior and posterior mitral valve leaflets adapt and remodel, the magnetic force can be appropriately weakened to reduce constraint on the leaflets; if signs of valve stenosis appear, the magnetic force can be reduced to zero or even slight repulsion.

[0021] The mitral valve repair device of this invention can be implanted simply by delivering the first and second anchor pieces to the target locations of the anterior and posterior leaflets of the mitral valve via a delivery catheter and then releasing them. This eliminates the need for complex clamp positioning and alignment operations, simplifying the surgical procedure, shortening the operation time, and reducing the difficulty of the procedure. Furthermore, the first and second anchor pieces have simple structures and small sizes, allowing delivery via smaller diameter delivery devices, reducing vascular puncture damage and effectively preventing thrombosis. When replacing the anterior and posterior leaflets of the mitral valve, the first and second anchor pieces do not obstruct the surgeon's operation, and the replacement process does not require tearing open the anterior and posterior leaflets, reducing surgical complexity and risk. Attached Figure Description

[0022] Figure 1 This is one of the structural schematic diagrams of the anterior mitral leaflet, posterior mitral leaflet, and mitral valve repair device provided in the embodiments of the present invention; Figure 2 This is the second schematic diagram of the structure of the anterior mitral leaflet, posterior mitral leaflet, and mitral valve repair device provided in the embodiments of the present invention; Figure 3 This is a schematic diagram of the mitral valve repair device provided in an embodiment of the present invention; Figure 4 This is a front view of the mitral valve repair device provided in an embodiment of the present invention.

[0023] In the picture: 1. First anchor piece; 11. First piece body; 12. Second piece body; 13. Barb; 2. Second anchor piece; 3. Suture thread; 100. Anterior leaflet of the mitral valve; 200. Posterior leaflet of the mitral valve. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] Example 1 like Figures 1 to 4 As shown, this embodiment provides a mitral valve repair device, which includes a first anchor plate 1 and a second anchor plate 2. The first anchor plate 1 is provided with a first magnetic attraction element and is used to fix the anterior mitral valve leaflet 100. The second anchor plate 2 is provided with a second magnetic attraction element and is used to fix the posterior mitral valve leaflet 200. The first anchor plate 1 and the second anchor plate 2 are configured such that: during cardiac systole, the left ventricular pressure rises sharply, pushing the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200 closer together, causing the first anchor plate 1 and the second anchor plate 2 to attract each other, thereby causing the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200 to completely close; during cardiac diastole, the first anchor plate 1 and the second anchor plate 2 separate under the impact of blood flow, and the magnetic attraction between the first anchor plate 1 and the second anchor plate 2 decreases rapidly with increasing distance, thereby separating the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200.

[0029] The mitral valve repair device of the present invention, during cardiac systole, uses the attraction between the first anchor 1 and the second anchor 2 to attract each other, assisting in the complete closure of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, thereby reducing regurgitation. During cardiac diastole, the first anchor 1 and the second anchor 2 can separate under the impact of blood flow, allowing the mitral valve orifice to open normally. The mitral valve repair device of the present invention achieves dynamic reversible separation and engagement of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, effectively reducing systolic regurgitation while maximizing the preservation of the diastolic valve orifice opening area, fundamentally avoiding iatrogenic mitral stenosis. Furthermore, during cardiac diastole, the first anchor 1 and the second anchor 2 separate under the impact of blood flow, and the first anchor 1 and the second anchor 2 do not exert continuous tension on the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, thus preventing tearing of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200. No rigid connection is required between the first anchor plate 1 and the second anchor plate 2, so even if the first anchor plate 1 and the second anchor plate 2 fail, it is not easy to cause blockage.

[0030] The mitral valve repair device of this invention utilizes magnetic attraction to assist the closure of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, through a first anchor 1 and a second anchor 2. It is independent of the specific shape and thickness of the anterior and posterior mitral valve leaflets 100 and 200, exhibiting greater adaptability to the valve leaflet anatomy and a wider range of applications. Furthermore, postoperatively, under non-invasive conditions, the magnetic attraction force can be adjusted, and even the magnetic pole direction can be switched, by driving the first and second magnetic attraction components with an external magnetic field. The treatment intensity can be individually adjusted according to the patient's postoperative recovery: initially, a stronger magnetic attraction force can be set to fully correct regurgitation; after the anterior and posterior mitral valve leaflets 100 and 200 have adapted and remodeled, the magnetic force can be appropriately weakened to reduce the constraint on the leaflets; if signs of valve stenosis appear, the magnetic force can be reduced to zero or even a slight repulsive force.

[0031] The mitral valve repair device of the present invention can be implanted by delivering the first anchor 1 and the second anchor 2 to the target positions of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200 respectively through a delivery catheter and then releasing them. This eliminates the need for complex clamp positioning and alignment operations, simplifying the surgical procedure, shortening the operation time, and reducing the difficulty of the operation. At the same time, the first anchor 1 and the second anchor 2 have a simple structure and small size, and can be delivered by a delivery device with a smaller diameter, reducing vascular puncture damage and effectively avoiding thrombus formation. Furthermore, when replacing the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, the first anchor 1 and the second anchor 2 will not obstruct the doctor's operation, and the replacement process does not require tearing open the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, reducing the complexity and risk of the operation.

[0032] Specifically, both the first anchor plate 1 and the second anchor plate 2 are thin sheets. The shapes of the first anchor plate 1 and the second anchor plate 2 can be circular, elliptical, rectangular, or elongated, and this embodiment does not limit this. The dimensions of the first anchor plate 1 and the second anchor plate 2 are customized according to the size of the reflux port. Preferably, the diameter or length of the first anchor plate 1 and the second anchor plate 2 is in the range of 3mm-15mm, and the thickness is in the range of 0.5mm-3mm. The dimensions of the first anchor plate 1 and the second anchor plate 2 within the above range can reduce the interference of the first anchor plate 1 and the second anchor plate 2 on the movement of the anterior leaflet 100 and the posterior leaflet 200 of the mitral valve.

[0033] Optionally, both the first and second magnetic attractors are magnets and attract each other, so that the first anchor plate 1 and the second anchor plate 2 can be attracted to each other. Specifically, both the first and second magnetic attractors are permanent magnets, and the magnetic pole directions of the first and second magnetic attractors are set so that they attract each other when the anterior leaflet 100 and the posterior leaflet 200 of the mitral valve are closed. For example, the N pole of the first anchor plate 1 faces the mating edge of the anterior leaflet 100 of the mitral valve, and the S pole of the second anchor plate 2 faces the mating edge of the posterior leaflet 200 of the mitral valve. The first anchor plate 1 and the second anchor plate 2 can be pre-magnetized or magnetized after implantation in the human body.

[0034] Optionally, of the first magnetic attractor and the second magnetic attractor, one is a magnet and the other is a magnetic conductor, so that the first anchor piece 1 and the second anchor piece 2 can attract each other. Specifically, of the first magnetic attractor and the second magnetic attractor, one is a permanent magnet and the other is pure iron or an iron-cobalt alloy.

[0035] Optionally, at least two of each of the first anchor plate 1 and the second anchor plate 2 are provided, and they are arranged in a one-to-one correspondence. Providing at least two of each of the first anchor plates 1 and the second anchor plate 2 improves the closure effect of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200. Specifically, two of each of the first anchor plates 1 and the second anchor plates 2 are provided, with the two first anchor plates 1 and the two second anchor plates 2 spaced apart. This arrangement, through two-point distributed magnetic attraction, allows for more uniform force distribution on the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, reducing local stress concentration and further lowering the strength requirements for the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200. In other embodiments, the number of the first anchor plates 1 and the second anchor plates 2 is determined according to specific circumstances and is not limited to this embodiment.

[0036] Optionally, the magnetic attraction force between the first magnetic attractor and the second magnetic attractor ranges from 0.2N to 10N. Within this range, the magnetic attraction force ensures that the first anchor plate 1 and the two second anchor plates 2 can attract each other, while simultaneously allowing the first anchor plate 1 and the second anchor plates 2 to separate under the impact of blood flow. Specifically, the magnetic attraction force of the first magnetic attractor and the second magnetic attractor can be 0.2N, 1N, 2N, 3N, 5N, or 10N. Preferably, the magnetic attraction force ranges from 1N to 3N.

[0037] Optionally, the mitral valve repair device also includes a suture 3. The first anchor plate 1 is sutured to the anterior leaflet 100 of the mitral valve via the suture 3, and the second anchor plate 2 is sutured to the posterior leaflet 200 of the mitral valve via the suture 3. The suture 3 facilitates the fixation of the first anchor plate 1 and the second anchor plate 2.

[0038] Optionally, the first anchor piece 1 includes a first piece 11 and a second piece 12, which are respectively disposed on opposite sides of the anterior leaflet 100 of the mitral valve. A suture 3 sutures the first piece 11 and the second piece 12 to the anterior leaflet 100. This arrangement, by suturing the first piece 11 and the second piece 12 to opposite sides of the anterior leaflet 100, avoids the suture 3 directly suturing to the anterior leaflet 100, which could cause tearing. Specifically, both the first piece 11 and the second piece 12 have suture holes to facilitate the passage of the suture 3. One of the first piece 11 and the second piece 12, facing the posterior leaflet 200, is provided with a first magnetic element. The second anchor piece 2 has the same structure as the first anchor piece 1, and will not be described in detail in this embodiment. In another embodiment, the first anchor piece 1 is bonded to the anterior leaflet 100, and the second anchor piece 2 is bonded to the posterior leaflet 200. The first anchor plate 1 and the second anchor plate 2 are respectively bonded and fixed to the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200 using biocompatible adhesives. In another embodiment, the mitral valve repair device further includes two fixing clips, with the first anchor plate 1 fixed to the anterior mitral valve leaflet 100 by one fixing clip and the second anchor plate 2 fixed to the posterior mitral valve leaflet 200 by the other fixing clip.

[0039] Optionally, both the first sheet 11 and the second sheet 12 have barbs 13 on the side facing the anterior mitral valve leaflet 100. By providing the barbs 13, the connection strength between the first sheet 11 and the second sheet 12 and the anterior mitral valve leaflet 100 can be improved, enhancing the stability of the fixation of the first sheet 11 and the second sheet 12, which is beneficial for tissue ingrowth or initial fixation. Specifically, at least two barbs 13 in the same direction are provided at intervals on both the first sheet 11 and the second sheet 12. In other embodiments, the side of the first sheet 11 and the second sheet 12 facing the anterior mitral valve leaflet 100 can also be configured as a porous structure.

[0040] Optionally, the barbs 13 on the first piece 11 and the barbs 13 on the second piece 12 are symmetrically arranged about the anterior leaflet 100 of the mitral valve, so that the barbs 13 on the first piece 11 and the second piece 12 are subjected to more uniform force.

[0041] Optionally, both the first anchor plate 1 and the second anchor plate 2 are provided with positioning elements. By providing positioning elements, precise positioning and release of the first anchor plate 1 and the second anchor plate 2 during interventional procedures are facilitated. Specifically, the positioning element is a radiopaque marker. Exemplarily, the radiopaque marker is a platinum-iridium ring or coating that is opaque to X-rays, enabling precise positioning and release of the first anchor plate 1 and the second anchor plate 2 during interventional procedures using imaging techniques such as ultrasound or DSA. In other embodiments, the first anchor plate 1 and the second anchor plate 2 can also be positioned electromagnetically.

[0042] Optionally, both the first anchor plate 1 and the second anchor plate 2 are covered with a coating layer. This coating layer prevents the first and second magnetic components from directly contacting the blood. Specifically, the coating layer is a biocompatible coating layer. For example, the biocompatible coating layer is polytetrafluoroethylene (PTFE), polyethylene terephthalate (PET), or a titanium alloy coating. The biocompatible coating layer improves the biocompatibility of the first anchor plate 1 and the second anchor plate 2 with the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, and facilitates endothelial cell coverage, promoting endothelialization of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, further reducing thrombus formation.

[0043] Example 2 like Figures 1 to 4 As shown, this embodiment provides a mitral valve repair device, which includes a first anchor plate 1 and a second anchor plate 2. The difference between this embodiment and Embodiment 1 is that both the first anchor plate 1 and the second anchor plate 2 include a magnetic fluid. The first anchor plate 1 is injected into the anterior leaflet 100 of the mitral valve, and the second anchor plate 2 is injected into the posterior leaflet 200 of the mitral valve. This arrangement effectively prevents the first anchor plate 1 and the second anchor plate 2 from detaching. Specifically, both the first anchor plate 1 and the second anchor plate 2 also include hydrogel. The hydrogel encapsulates the magnetic fluid. The hydrogel is injected into the anterior leaflet 100 and the posterior leaflet 200 of the mitral valve, respectively, and then solidifies.

[0044] Example 3 like Figures 1 to 4As shown, this embodiment provides a mitral valve repair system, which includes a delivery device and the mitral valve repair device of Embodiment 1 or Embodiment 2. The delivery device delivers a first anchor 1 to the anterior mitral valve leaflet 100 and a second anchor 2 to the posterior mitral valve leaflet 200. In this embodiment, the mitral valve repair system assists in the closure of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200 during cardiac systole through the attraction between the first anchor 1 and the second anchor 2. During cardiac diastole, the first anchor 1 and the second anchor 2 can separate under the impact of blood flow, achieving dynamic reversible separation and rejoining of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200, effectively reducing systolic regurgitation while maximizing the preservation of the diastolic valve opening area. It also effectively avoids tearing of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200. No rigid connection is required between the first anchor 1 and the second anchor 2, reducing the risk of embolism. Furthermore, the use of magnetic attraction to assist the closure of the anterior mitral valve leaflet 100 and the posterior mitral valve leaflet 200 is not dependent on the specific shape and thickness of these leaflets, making it more adaptable to the anatomical structure of the valve leaflets and applicable to a wider range of situations. Postoperatively, the magnetic attraction force can be adjusted, and even the magnetic pole direction can be switched, by driving the first and second magnetic attraction components with an external magnetic field, allowing for individualized adjustments to the treatment intensity based on the patient's postoperative recovery.

[0045] The mitral valve repair system uses a delivery device to transport the first anchor 1 to the anterior leaflet 100 of the mitral valve and the second anchor 2 to the posterior leaflet 200. Implantation is completed upon release, eliminating the need for complex clamp positioning and alignment operations, thus simplifying the surgical procedure, shortening the operation time, and reducing the difficulty of the procedure. Furthermore, the simple structure and small size of the first and second anchors allow for delivery using smaller diameter delivery devices, reducing vascular puncture damage and effectively preventing thrombosis.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A mitral valve repair device, characterized in that, include: The first anchor plate (1) is provided with a first magnetic attraction element and is used to fix the first anchor plate (1) to the anterior leaflet (100) of the mitral valve. The second anchor plate (2) is provided with a second magnetic attraction element and is used to fix the posterior leaflet (200) of the mitral valve. The first anchor plate (1) and the second anchor plate (2) are configured such that: during cardiac systole, the first anchor plate (1) and the second anchor plate (2) attract each other to drive the anterior leaflet (100) and the posterior leaflet (200) of the mitral valve to close completely; during cardiac diastole, the first anchor plate (1) and the second anchor plate (2) separate from each other under the impact of blood flow to separate the anterior leaflet (100) and the posterior leaflet (200) of the mitral valve.

2. The mitral valve repair device according to claim 1, characterized in that, Both the first magnetic attractor and the second magnetic attractor are magnets and attract each other; or, of the first magnetic attractor and the second magnetic attractor, one is a magnet and the other is a magnetic conductor.

3. The mitral valve repair device according to claim 1, characterized in that, The magnetic attraction force between the first magnetic element and the second magnetic element ranges from 0.2N to 10N; and / or, The first anchor piece (1) and the second anchor piece (2) are each provided in at least two and are provided in a one-to-one correspondence.

4. The mitral valve repair device according to claim 1, characterized in that, The mitral valve repair device also includes a suture (3), the first anchor (1) is sutured to the anterior leaflet (100) of the mitral valve through the suture (3), and the second anchor (2) is sutured to the posterior leaflet (200) of the mitral valve through the suture (3).

5. The mitral valve repair device according to claim 4, characterized in that, The first anchor plate (1) includes a first piece (11) and a second piece (12). The first piece (11) and the second piece (12) are respectively disposed on opposite sides of the anterior leaflet of the mitral valve (100). The suture (3) sutures the first piece (11) and the second piece (12) to the anterior leaflet of the mitral valve (100).

6. The mitral valve repair device according to claim 5, characterized in that, Both the first piece (11) and the second piece (12) have barbs (13) on the side facing the anterior leaflet (100) of the mitral valve.

7. The mitral valve repair device according to claim 6, characterized in that, The barbs (13) on the first piece (11) and the barbs (13) on the second piece (12) are symmetrically arranged with respect to the anterior leaflet (100) of the mitral valve.

8. The mitral valve repair device according to claim 1, characterized in that, The first anchor plate (1) is bonded to the anterior leaflet (100) of the mitral valve, and the second anchor plate (2) is bonded to the posterior leaflet (200) of the mitral valve; or, The mitral valve repair device further includes two fixing clips. The first anchor (1) is fixed to the anterior leaflet (100) of the mitral valve by one of the fixing clips, and the second anchor (2) is fixed to the posterior leaflet (200) of the mitral valve by the other fixing clip; or, Both the first anchor plate (1) and the second anchor plate (2) include magnetic fluid. The first anchor plate (1) is used to inject into the anterior leaflet (100) of the mitral valve, and the second anchor plate (2) is used to inject into the posterior leaflet (200) of the mitral valve.

9. The mitral valve repair device according to claim 1, characterized in that, Both the first anchor plate (1) and the second anchor plate (2) are provided with positioning elements; and / or, Both the first anchor piece (1) and the second anchor piece (2) are covered with a covering layer.

10. A mitral valve repair system, characterized in that, The device includes a delivery device and a mitral valve repair device as described in any one of claims 1-9, wherein the delivery device delivers the first anchor (1) to the anterior leaflet (100) of the mitral valve and the delivery device delivers the second anchor (2) to the posterior leaflet (200) of the mitral valve.

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