Auxiliary clamping simulation device for treating mitral valve regurgitation

Abstract

The utility model provides an auxiliary clamping simulation device for treating mitral valve regurgitation. The auxiliary clamping simulation device comprises a water bath, a rotating device arranged on the outer side of the water bath and a cam mechanism connected with the rotating device. The bottom support is fixed in the water bath, the valve ring structure is arranged on the bottom support, and the valve leaflet is connected with the valve ring structure and is connected with the cam mechanism through chordae tendineae. The valve leaflet is of a trumpet-like shell structure, one end of the valve leaflet is flat and provided with a first long-strip-shaped opening, the other end of the valve leaflet is cylindrical and provided with a second round opening, and the first opening and the second opening are communicated with each other. According to the auxiliary clamping simulation device for treating mitral valve regurgitation, training simulation operation can be carried out on the mitral valve repairing process, and experiment / clinical operation risks can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, in particular to an auxiliary clamping simulation device for treating mitral valve regurgitation. Background Art

[0002] Valves are membranous structures that can open and close inside the organs of humans or certain animals. For example, each person's heart has four valves, namely the aortic valve, pulmonary valve, mitral valve, and tricuspid valve. Taking the mitral valve as an example, the mitral valve is located between the left atrium and the left ventricle. When the left ventricle contracts, the mitral valve acts as a check valve to tightly close the atrioventricular orifice and prevent blood from flowing back from the left ventricle into the left atrium. However, when the mitral valve becomes diseased, it may be difficult to close completely when the left ventricle contracts, causing the left atrium to receive a large amount of reflux blood. This may cause a sharp increase in left atrial and pulmonary venous pressure, increase the left ventricular diastolic volume load, and further lead to a series of pathological changes such as left ventricular enlargement and pulmonary hypertension, ultimately leading to clinical manifestations such as heart failure and arrhythmias, which can be life-threatening in severe cases.

[0003] When repairing a diseased mitral valve, it can be achieved through a mitral valve repair device. For example, the opposite sides of the mitral valve can be clamped by a mitral valve clamping device, so that the hole between the mitral valves is changed from one large hole to two small holes, reducing the regurgitation area, thereby effectively preventing the occurrence of mitral valve regurgitation. The clamp body is one of the main components of the mitral valve clamping device for clamping the mitral valve. Similarly, the mitral valve clamping device can also be used to repair other valves such as the tricuspid valve of the heart, and the effect of reducing the regurgitation area is achieved by clamping the leaflets on both sides.

[0004] Currently, standard treatments for heart valve regurgitation include surgical repair / treatment and endovascular clipping. Standard surgical repair or replacement procedures require open-heart surgery, extracorporeal circulation, and cardiac arrest. Surgery is invasive and carries a high risk of death, stroke, hemorrhage, respiratory distress, kidney disease, and other complications, making it inaccessible to many patients.

[0005] In recent years, some device manufacturers have developed endovascular clipping technology. In this method, a clip made of biocompatible material is inserted into the heart valve between the two leaflets, clamping the middle part of the two leaflets (mainly the A2 and P2 leaflets) to prevent leaflet prolapse. However, the shortcomings of this technology are also obvious, such as the difficulty of positioning during the operation, the difficulty of removal if the implant is improper, the recurrence of heart valve regurgitation, the need to implant multiple clips in one operation, and strict patient selection.

[0006] Therefore, in order to further reduce the risk of experimental / clinical operations, this proposal proposes an auxiliary clamping simulation device for treating mitral regurgitation, which is used to train and simulate the mitral valve repair process, thereby avoiding traumatic surgical operations. Utility Model Content

[0007] The purpose of the present utility model is to provide an auxiliary clamping simulation device for treating mitral regurgitation, which solves the technical problem of how to train simulation operations for the mitral valve repair process. Through advance simulation operation training of medical personnel, it helps to reduce the risks of subsequent experimental / clinical actual operations.

[0008] An auxiliary clamping simulation device for treating mitral regurgitation, comprising a water bath, a rotating device arranged outside the water bath, and a cam mechanism connected to the rotating device;

[0009] It also includes a bottom support fixed inside the water bath, a valve ring structure arranged on the bottom support, and a valve leaf connected to the valve ring structure, wherein the valve leaf is connected to the cam mechanism through tendon cords.

[0010] The leaflet is a trumpet-shaped shell structure, one end of which is flat and provided with a long strip-shaped opening 1, and the other end of which is cylindrical and provided with a circular opening 2, and the opening 1 and the opening 2 are connected to each other.

[0011] Memory metal rods are respectively provided on the leaflet and on both sides of the second opening.

[0012] An annular flange is provided on the leaflet and on the outer edge of the second opening, and the flange is fixed to the valve ring structure through a plurality of connectors.

[0013] There are two groups of tendon cords, and the two groups of tendon cords are respectively arranged at two ends of the opening one;

[0014] Any of the tendon cords includes an upper clamping part and a lower clamping part that are parallel to each other, one end of the upper clamping part and the lower clamping part are respectively fixedly connected to the upper and lower sides of one end of the leaflet, and the other end thereof is connected to the cam mechanism.

[0015] The rotating device is connected to one end of the rotating rod, the other end of the rotating rod passes through the water bath and is connected to the cam mechanism, and the rotating rod is rotatably sealed to the outer side of the water bath.

[0016] The cam mechanism is provided with valve opening width slots at both ends, and regurgitation width slots at both sides. The center line connecting the two valve opening width slots is perpendicular to the center line connecting the two regurgitation width slots.

[0017] The water bath is full of water.

[0018] The inner side of the water bath is fixed with an atrial septum which is tilted and designed to be close to the valve ring structure.

[0019] The memory metal rod is semi-annular and is arranged close to the connecting piece.

[0020] The utility model achieves the following technical effects:

[0021] (1) This scheme is used to simulate the mitral valve clamping process. The water bath is filled with water, and the rotating device drives the rotating rod to rotate. At the same time, the cam mechanism drives the memory metal rod to open and close up and down, achieving the effect of simulating the opening and closing of the human valve;

[0022] (2) The mitral valve clip device passes through the atrial septum to the upper part of the valve ring structure. The opening and closing of the valve leaflets can be seen through the ultrasound probe. Then the device moves from the upper part of the valve ring structure to the lower part of the valve leaflet. The cam mechanism assists in opening the valve leaflet, changing it from a single-hole structure to a double-hole structure. At this time, the signal can be clearly detected by the ultrasound probe. The operation is convenient and fast. It is a single-person simulation operation. The introduction of ultrasound guidance technology can further restore the authenticity of the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structure of the clamping device in this utility model is shown as follows Figure 1 .

[0024] Figure 2 The structure of the clamping device in this utility model is shown as follows Figure 2 .

[0025] Figure 3 Schematic diagram of the connection structure of the valve ring structure, atrial septum and cam mechanism in this utility model Figure 1 .

[0026] Figure 4 Schematic diagram of the connection structure of the valve ring structure, atrial septum and cam mechanism in this utility model Figure 2 .

[0027] Figure 5 This is a front view of the atrial septum and chordae tendineae in the present invention.

[0028] Among them, the figures are marked as: 1. water bath; 2. rotating rod; 21. cam mechanism; 3. rotating device; 4. atrial septum; 5. valve ring structure; 6. connecting part; 7. valve leaflet; 71. memory metal rod; 8. bottom support; 9. flange; 10. tendon; 101. valve opening width slot; 102. regurgitation width slot. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0030] See also Figure 1-Figure 5 , an auxiliary clamping simulation device for treating mitral regurgitation, comprising a water bath 1, a rotating device 3 arranged outside the water bath 1, and a cam mechanism 21 connected to the rotating device 3;

[0031] It also includes a bottom support 8 fixed inside the water bath 1, a valve ring structure 5 arranged on the bottom support 8, and a valve leaflet 7 connected to the valve ring structure 5. The valve leaflet 7 is connected to the cam mechanism 21 through a tendon 10.

[0032] The leaflet 7 is a trumpet-like shell structure, one end of which is flat and provided with a long strip-shaped opening 1, and the other end of which is cylindrical and provided with a circular opening 2, and the opening 1 and the opening 2 are connected to each other.

[0033] Memory metal rods 71 are provided on the leaflet 7 and on both sides of the second opening.

[0034] An annular flange 9 is provided on the outer edge of the leaflet 7 and the second opening. The flange 9 is fixed to the valve ring structure 5 through a plurality of connectors 6 .

[0035] There are two groups of tendon cords 10, and the two groups of tendon cords 10 are respectively arranged at the two ends of the opening 1;

[0036] Any tendon 10 includes an upper clamping portion and a lower clamping portion that are parallel to each other. One end of the upper clamping portion and the lower clamping portion are respectively fixedly connected to the upper and lower sides of one end of the leaflet 7, and the other end thereof is connected to the cam mechanism 21.

[0037] The rotating device 3 is connected to one end of the rotating rod 2 , and the other end of the rotating rod 2 passes through the water bath 1 and is connected to the cam mechanism 21 . The rotating rod 2 is rotatably sealed to the outer side of the water bath 1 .

[0038] The cam mechanism 21 has valve opening width slots 101 at both ends and regurgitation width slots 102 on both sides. The center line connecting the two valve opening width slots 101 and the center line connecting the two regurgitation width slots 102 are perpendicular to each other.

[0039] The water bath 1 is full of water.

[0040] An atrial septum 4 is fixed obliquely on the inner side of the water bath 1 , and the atrial septum 4 is designed to be located close to the valve ring structure 5 .

[0041] The memory metal rod 71 is semi-annular and is disposed close to the connecting member 6 .

[0042] The working process of this utility model:

[0043] This solution is used to simulate the mitral valve clamping process. The water bath 1 is filled with water, and the rotating device 3 drives the rotating rod 2 to rotate. At the same time, the cam mechanism 21 drives the memory metal rod 71 to open and close up and down, achieving the effect of simulating the opening and closing of the human valve;

[0044] The instrument of the mitral valve clip passes through the atrial septum 4 to the top of the valve ring structure 5. The opening and closing of the leaflets 7 can be seen through the ultrasound probe. Then the instrument reaches the bottom of the valve leaflets 7 from the top of the valve ring structure 5. The cam mechanism 21 assists in opening the leaflets 7, changing it from a single-hole structure to a double-hole structure. At this time, the signal can be clearly detected by the ultrasound probe. The operation is convenient and fast, and the single-person simulation operation is assisted by the introduction of ultrasound guidance technology to further restore the authenticity of the surgical operation.

[0045] At the same time, if the treatment fails, people can invert the valve clip, and then when the leaflets 7 are open, people can move from below it to above the valve annulus to ensure that the device can be safely withdrawn without damaging the leaflets 7;

[0046] In short, the operation is simple, and it can be simulated by one person. The introduction of ultrasound guidance technology further restores the authenticity of the surgical operation. In addition, when the regurgitation width slot is at position 102, the valve is in a closed regurgitation state, and when the valve opening width slot is at position 101, the valve is in an open position, which is also the optimal position for the instrument valve clip to move up and down.

[0047] Finally, to help people understand common knowledge about the mitral valve, this protocol provides the following notes:

[0048] The mitral valve is a bicuspid (two-leaflet) valve located between the left atrium (LA) and the left ventricle (LV). During diastole, the left atrium (LA) is filled with blood (preloaded), and the normally functioning mitral valve opens. As atrial pressure increases and exceeds left ventricular pressure, the mitral valve opens, allowing passive blood flow into the left ventricle.

[0049] As the atrial contraction and relaxation end, the remaining blood flows from the left atrium into the left ventricle. The mitral valve closes after the atrial contraction to prevent blood from reversing and flowing back from the left ventricle into the left atrium. The opening area of the human mitral valve is typically 4 to 6 square centimeters.

[0050] There are two leaflets 7, anterior and posterior, that together cover the mitral valve opening. The mitral valve opening is surrounded by a fibrous ring called the mitral annulus. The two leaflets 7 are circumferentially attached to the mitral annulus and open and close like a circular hinge during the cardiac cycle.

[0051] In a normally functioning mitral valve, the leaflets 7 are connected to the left ventricular papillary muscles by chordae tendineae 10. When the left ventricle contracts, the intraventricular pressure forces the mitral valve to close, and the chordae tendineae 10 ensure that the two leaflets 7 are anastomosed (to prevent the two leaflets 7 from prolapsing into the left atrium and causing mitral regurgitation) and prevent the valve from opening and closing in the wrong direction (thereby preventing blood from flowing back into the left atrium).

[0052] The technical features not described in the present invention can be realized by or by adopting the existing technology, and will not be described in detail here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. An auxiliary clamping simulation device for treating mitral regurgitation, characterized in that: It comprises a water bath (1), a rotating device (3) arranged outside the water bath (1), and a cam mechanism (21) connected to the rotating device (3); It also includes a bottom support (8) fixed inside the water bath (1), a valve ring structure (5) arranged on the bottom support (8), and a valve leaflet (7) connected to the valve ring structure (5), wherein the valve leaflet (7) is connected to the cam mechanism (21) via a tendon (10).

2. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 1, characterized in that: The leaflet (7) is a trumpet-like shell structure, one end of which is flat and provided with a long strip-shaped opening 1, and the other end of which is cylindrical and provided with a circular opening 2, and the opening 1 and the opening 2 are connected to each other.

3. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 2, characterized in that: Memory metal rods (71) are respectively provided on the leaflet (7) and on both sides of the second opening.

4. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 2, characterized in that: An annular flange (9) is provided on the leaflet (7) and on the outer edge of the second opening. The flange (9) is fixed to the valve ring structure (5) via a plurality of connectors (6).

5. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 2, characterized in that: The tendon cords (10) have two groups, and the two groups of tendon cords (10) are respectively arranged at the two ends of the opening one; Any of the tendon cords (10) includes an upper clamping portion and a lower clamping portion that are parallel to each other, one end of the upper clamping portion and the lower clamping portion are respectively fixedly connected to the upper and lower sides of one end of the leaflet (7), and the other end thereof is connected to the cam mechanism (21).

6. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 1, characterized in that: The rotating device (3) is connected to one end of the rotating rod (2), the other end of the rotating rod (2) passes through the water bath (1) and is connected to the cam mechanism (21), and the rotating rod (2) is connected to the outer side of the water bath (1) in a rotating seal.

7. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 6, characterized in that: The cam mechanism (21) is provided with valve opening width slots (101) at both ends, and regurgitation width slots (102) at both sides, and a center line connecting the two valve opening width slots (101) and a center line connecting the two regurgitation width slots (102) are perpendicular to each other.

8. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 1, characterized in that: The water bath (1) is full of water.

9. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 1, characterized in that: An atrial septum (4) is fixed obliquely on the inner side of the water bath (1), and the atrial septum (4) is designed to be close to the valve ring structure (5).

10. The auxiliary clamping simulation device for treating mitral regurgitation according to claim 4, characterized in that: The memory metal rod (71) is semi-annular and is arranged close to the connecting piece (6).

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