A flexible capture device for a heart mitral valve

Abstract

The present application relates to a kind of flexible capture device of heart mitral valve, including shell, drive mechanism, capture main body, spring compression mechanism and flexible capture mechanism, the inner wall of one end of shell is equipped with first track, variable track area and second track;Drive mechanism one end is equipped with first protruding tooth;Capture main body one end outer surface is equipped with second protruding tooth, and the other end face installs flexible capture mechanism;Second protruding tooth is contacted with first protruding tooth, located in first track or second track;Drive mechanism, capture main body and flexible capture mechanism are all connected with traction rope.Compared with prior art, the present application has by setting flexible capture mechanism, can fix mitral valve, solve valve reverse problem, can effectively reduce the phenomenon that medical surgical clip is not stable in surgery, to improve surgical efficiency;Capture device is cylindrical as a whole, each component is mutually nested, compact structure, is driven by traction rope, need not complex power structure, overall volume is small, and the advantages such as convenient operation.

Description

TECHNICAL FIELD

[0001] The present application relates to medical devices, in particular to a flexible capture device for heart mitral valve. BACKGROUND

[0002] With the aggravation of social aging, the number of patients with heart mitral valve insufficiency is increasing. Elderly patients usually cannot bear the great trauma and long recovery period brought by traditional open surgery, therefore, the minimally invasive transcatheter edge-to-edge repair (TEER) surgery of mitral valve becomes an ideal choice.

[0003] The current mitral valve repair surgery sends a medical surgical clip into the heart through transcatheter intervention technology, and uses the mitral valve clip used in TEER surgery to hold the mitral valve, thereby effectively relieving the problem of mitral valve insufficiency. However, the reverse and real-time opening and closing of the mitral valve during the operation greatly increase the difficulty of the operation, reduce the efficiency of the operation, and increase the risk of the operation. Therefore, there is a lack of a device that can solve the problem of valve reversal and fix the mitral valve during the TEER operation.

[0004] Existing papers show that the current flexible capture device has problems such as large driving structure volume or large number of drives, which cannot be applied in catheter robots. Therefore, how to design a device with small structure and capable of solving the problem of valve reversal and fixing the mitral valve is a technical problem to be solved. SUMMARY

[0005] The purpose of the present application is to overcome the defects of large driving structure volume or large number of drives in the prior art and provide a flexible capture device for heart mitral valve.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] According to one aspect of the present application, a flexible capture device for heart mitral valve is provided, comprising a shell, a driving mechanism, a capture main body, a spring compression mechanism and a flexible capture mechanism, the shell, the driving mechanism and the capture main body are hollow cylinders;

[0008] The inner wall of one end of the shell is provided with a first track, a variable track area and a second track arranged in sequence, the first track and the second track are in the axial direction of the shell and have different lengths; the driving mechanism is installed inside the shell, and one end is provided with a plurality of first protrusions uniformly distributed in the circumference; the capture main body is installed inside the driving mechanism, and one end of the outer surface is provided with a plurality of second protrusions uniformly distributed in the circumference, and the other end of the end face is provided with the flexible capture mechanism; one end of the spring compression mechanism is slidably connected with the inner wall of the other end of the shell, and the other end abuts against the end face provided with the one end of the second protrusion of the capture main body;

[0009] The second protruding tooth is in contact with the first protruding tooth, and the second protruding tooth is located in the first track, the second track or between the two tracks; the driving mechanism, the capturing body and the flexible capturing mechanism are connected with a traction rope, and the other end of the traction rope is led out of the shell and connected with one end of the spring compression mechanism.

[0010] As a preferred technical solution, the inner wall of the one end of the shell connected with the spring compression mechanism is provided with a through hole in the axial direction of the shell, and the traction rope passes through the through hole to the outside of the shell.

[0011] As a preferred technical solution, the first protruding tooth and the second protruding tooth are both triangular in shape, and when the second protruding tooth is located in the first track or the second track, it is in contact with one inclined surface of the first protruding tooth, and when the first protruding tooth is located in the track changing area, it is in contact with the entire one inclined surface of the second protruding tooth.

[0012] As a preferred technical solution, the other end of the driving mechanism is provided with a plurality of third protruding teeth uniformly distributed on the outer circumferential surface, and the shell is provided with a groove, and the third protruding teeth are clamped in the groove.

[0013] As a preferred technical solution, the spring compression mechanism comprises a spring mounting structure and a spring, the spring mounting structure is slidingly connected with the shell and the capturing body, and the spring is mounted on the spring mounting structure.

[0014] As a preferred technical solution, the spring mounting structure comprises a mounting disc and a mounting column, one side of the mounting disc is provided with a mounting column in the axial direction of the shell, and the spring is sleeved on the mounting column; the mounting column is slidingly connected with the shell, and the mounting disc abuts against the capturing body.

[0015] As a preferred technical solution, the capturing body comprises a protruding tooth section and a capturing mechanism mounting section, the second protruding tooth is arranged on the outer circumferential surface of the protruding tooth section, and the flexible capturing mechanism is mounted on the end face of the capturing mechanism mounting section; the inner diameter and the outer diameter of the capturing mechanism mounting section are both smaller than those of the protruding tooth section, and the mounting disc abuts against the inner surface of the step formed by the protruding tooth section and the capturing mechanism mounting section.

[0016] As a preferred technical solution, the flexible capturing mechanism comprises a plurality of long strip-shaped capturing pieces, the capturing pieces are bent towards the outside of the capturing device as a whole to form a mounting area and a bending area; the bending area is provided with a through hole, and the traction rope of the flexible capturing mechanism passes through the through hole and is fixed in the bending area.

[0017] As a preferred technical solution, the end face of the capturing body is provided with a plurality of arc-shaped grooves and through holes uniformly distributed in the circumferential direction, one end of the mounting area is inserted into the arc-shaped groove, and the traction rope of the flexible capturing mechanism passes through the through hole and leads out of the capturing body.

[0018] Preferably, the shell, the driving mechanism and the capturing body are made of TPU material, and the flexible capturing mechanism is made of PET material.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1) The flexible capturing mechanism can fix the mitral valve, solve the problem of valve reversal, effectively reduce the instability of the medical surgical clamp during surgery, thereby improving the surgical efficiency and reducing the surgical risk; the capturing device is in a cylindrical shape, the components are mutually nested, the structure is compact, the device is driven by the traction rope, does not need a complex power structure, has a small overall volume, and is convenient to operate.

[0021] 2) The shell, the driving mechanism and the capturing body are provided with tracks and protrusions, when the second protrusion is located in the first track, the flexible capturing mechanism is retracted, and when the second protrusion is located in the second track, the flexible capturing mechanism is released. The capturing body is driven by the driving mechanism and supported by the spring compression mechanism to realize track conversion, and then realize the extension and retraction of the flexible capturing mechanism.

[0022] 3) The flexible capturing mechanism can realize the expansion of different areas by being pulled by the traction rope, and the expansion area can be adjusted according to the requirements in different situations, so that the mitral valve can be effectively fixed. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic view of a flexible capturing device for a heart mitral valve according to the present application;

[0024] Figure 2 It is a structural schematic view of a shell according to the present application;

[0025] Figure 3 It is a structural schematic view of a driving mechanism according to the present application;

[0026] Figure 4 It is a structural schematic view of an arc-shaped groove and a through hole of a driving mechanism according to the present application;

[0027] Figure 5 It is a structural schematic view of a capturing body according to the present application;

[0028] Figure 6 It is a structural schematic view of a spring compression mechanism according to the present application;

[0029] Figure 7 It is a structural schematic view of a capturing piece according to the present application;

[0030] Figure 8 It is a process diagram of releasing a flexible capturing mechanism according to the present application;

[0031] Figure 9 It is a process diagram of retracting a flexible capturing mechanism according to the present application;

[0032] Figure 10 This is a schematic diagram of the flexible capture mechanism of the present invention capturing the mitral valve.

[0033] Figure 11 This is a schematic diagram of the flexible capture mechanism of the present invention opening the mitral valve.

[0034] The numbers in the diagram are as follows:

[0035] 1. Outer shell; 11. Upper end of outer shell; 12. Lower end of outer shell; 121. First track; 122. Track changing area; 123. Second track; 2. Drive mechanism; 21. First tooth; 22. Third tooth; 3. Capture body; 31. Capture mechanism mounting section; 311. Arc-shaped groove; 32. Tooth section; 321. Second tooth; 4. Spring compression mechanism; 41. Spring mounting structure; 411. Mounting plate; 412. Mounting column; 42. Spring; 5. Flexible capture mechanism; 51. Mounting area; 52. Bending area; 6. Traction rope. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] like Figure 1 As shown, this invention addresses the issues of mitral valve reversal and difficulty in capture during TEER surgery. It proposes a flexible mitral valve capture device that effectively reduces the number of actuators required for the flexible capture device, improving surgical efficiency. The capture device includes a housing 1, a drive mechanism 2, a capture body 3, a spring compression mechanism 4, a flexible capture mechanism 5, and a traction rope 6. The housing 1, drive mechanism 2, and capture body 3 can be made of TPU material, while the flexible capture mechanism 5 can be made of PET material. TPU is thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber; PET is polyethylene terephthalate.

[0038] like Figure 2As shown, the outer shell 1 is a hollow cylinder, with one end being the upper shell 11 and the other end being the lower shell 12. The inner wall of the upper shell 11 has six first tracks 121, six track-changing areas 122, and six second tracks 123. The first tracks 121, track-changing areas 122, and second tracks 123 are arranged in a cyclical pattern along the axial direction of the outer shell 1, with the same width. The wall thickness of the track-changing area 122 is greater than that of the first track 121, and the wall thickness of the first track 121 is greater than that of the second track 123. The ends of the first tracks 121 and track-changing areas 122 near the middle of the outer shell 1 are inclined surfaces, which guide the second protrusion 321. The length of the first track 121 is less than that of the second track 123. The first track 121 also has grooves that cooperate with the third protrusion 22 for guidance. The lower shell 12 has through holes along the axial direction of the outer shell 1, through which the traction rope 6 passes to the outside of the outer shell 1.

[0039] like Figure 3 As shown, the drive mechanism 2 is a hollow cylinder. First protruding teeth 21 are evenly distributed around the circumference of one end face, and third protruding teeth 22 are evenly distributed around the circumference of the outer surface of the other end. The ends of the first protruding teeth 21 are triangular and abut against second protruding teeth 321; the third protruding teeth 22 can slide on the track of the outer casing 1, causing the drive mechanism 2 to move axially along the outer casing 1. Figure 4 As shown, the third protrusion 22 or the drive mechanism 2 is provided with a groove and a through hole. The traction rope 6 passes through the groove and the through hole, with one end fixed to the drive mechanism 2 and the other end passing through the outer shell 1 and leading out to the outside of the outer shell 1.

[0040] like Figure 5 As shown, the capture body 3 is a hollow cylinder, including a toothed section 32 and a capture mechanism mounting section 31. The outer diameter of the toothed section 32 is larger than the outer diameter of the capture mechanism mounting section 31, and the inner diameter of the toothed section 32 is larger than the inner diameter of the capture mechanism mounting section 31. Therefore, steps are formed on both the inner and outer surfaces of the toothed section 32 and the capture mechanism mounting section 31. One end of the spring compression mechanism 4 rests on the step on the inner surface of the capture body 3. Second teeth 321 are evenly distributed on the outer circumference of the toothed section 32. The end of the second tooth 321 that mates with the first tooth 21 is an inclined surface that extends to the outside of the capture mechanism mounting section 31. The distance between two adjacent second teeth 321 is equal to the distance between two adjacent first tracks 121. That is, all second teeth 321 are located within the first track 121, or all are located within the second track 123, or all are off the track. The end face of the installation section 31 of the capture mechanism is provided with a plurality of circumferentially distributed arc-shaped grooves 311 and through holes. The capture plate is inserted into the arc-shaped grooves 311. The capture plate is driven to move by the movement of the capture body 3. The traction rope 6 passes through the through hole, with one end fixed to the capture body 3 and the other end passing through the outer shell 1 and leading out to the outside of the outer shell 1.

[0041] like Figure 6As shown, the spring compression mechanism 4 comprises a spring housing structure 41 and a spring 42, the spring housing structure 41 comprises a housing disc 411 and a housing column 412, the housing disc 411 is provided with the housing column 412 extending along the axial direction of the shell 1 on one side, and the spring 42 is sleeved on the housing column 412; the housing column 412 is in sliding connection with the shell 1, and the housing disc 411 abuts against the step of the capture main body 3. The spring 42 is kept in a compressed state, and gives the capture main body 3 a force for moving away from the lower end 12 of the shell along the axial direction.

[0042] The flexible capture mechanism 5 comprises a plurality of long strip-shaped capture pieces, such as Figure 7 As shown, the capture pieces are bent towards the outside of the whole capture device, forming a parallel region and a bent region 52, the bent region 52 is provided with a through hole, and the traction rope 6 is fixed at one end of the through hole and led out to the outside of the shell 1 at the other end.

[0043] As shown, Figure 8 The releasing process of the flexible capture mechanism 5 of the present application is as follows:

[0044] The driving mechanism 2 is pulled by the traction rope 6 to drive the capture main body 3 to move, at this time, the second protruding teeth 321 and the first protruding teeth 21 are partially in contact, when the second protruding teeth 321 on the surface of the capture main body 3 is about to be separated from the first track 121, the driving mechanism 2 is continuously pulled to drive the capture main body 3 to move a certain distance, the capture main body 3 is rotated for the first time, and the second protruding teeth 321 are completely slid into the groove formed by the two first protruding teeth 21 of the driving mechanism 2; the traction rope 6 is loosened, the end spring 42 releases the elastic force to drive the capture main body 3 to move linearly; when the second protruding teeth 321 of the capture main body 3 contact the edge of the track changing area 122, the second rotation movement is generated, and the second track 123 is entered, and the linear movement is continuously generated under the action of the spring 42, so as to release the flexible capture mechanism 5; the control traction rope 6 is pulled to unfold the flexible capture mechanism 5.

[0045] The present application drives the flexible capture mechanism 5 to fold and unfold by pulling the traction rope 6 to open the mitral valve.

[0046] As shown, Figure 9 The retracting process of the flexible capture mechanism 5 of the present application is as follows:

[0047] Pull the driving mechanism 2 by pulling the traction rope 6 to drive the capture body 3 to move, at this time the second protruding teeth 321 and the first protruding teeth 21 are partially in contact, when the second protruding teeth 321 on the surface of the capture body 3 is about to be separated from the second track 123, continue to pull the driving mechanism 2 to drive the capture body 3 to move a certain distance, the capture body 3 rotates for the first time, the second protruding teeth 321 are completely slid into the groove formed by the two first protruding teeth 21 of the driving mechanism 2; release the traction rope 6, the end spring 42 releases the elastic force, drives the capture body 3 to move linearly; when the second protruding teeth 321 of the capture body 3 contact the edge of the first track 121, rotate for the second time, and enter the first track 121, and continue to move linearly under the elastic force of the spring 42, so as to retract the flexible capture mechanism 5.

[0048] Compared with the conventional mitral valve repair surgery only with the medical surgical clip, the flexible capture mechanism 5 for fixing the mitral valve is added, which can effectively reduce the instability of the medical surgical clip in the surgery, thereby improving the operation efficiency and reducing the operation risk; since the flexible capture mechanism 5 is released and retracted only by pulling force, the rotation and linear motion are combined, the required driving force is effectively reduced, and the operation convenience is improved; the flexible capture mechanism 5 is pulled by the control line rope to realize the expansion of different areas, and the expansion area can be adjusted according to the requirements in the face of different situations, so as to effectively fix the mitral valve.

[0049] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A flexible capture device for a heart mitral valve, characterized in that, It comprises a shell (1), a driving mechanism (2), a capturing main body (3), a spring compression mechanism (4) and a flexible capturing mechanism (5), wherein the shell (1), the driving mechanism (2) and the capturing main body (3) are hollow cylinders; The inner wall of one end of the shell (1) is provided with a first track (121), a variable track area (122) and a second track (123) arranged in sequence, the first track (121) and the second track (123) are arranged along the axial direction of the shell (1) and have different lengths; the driving mechanism (2) is mounted on the inner side of the shell (1) and is provided with a plurality of first convex teeth (21) uniformly distributed on the circumference at one end; the capturing main body (3) is mounted on the inner side of the driving mechanism (2) and is provided with a plurality of second convex teeth (321) uniformly distributed on the circumference on the outer surface at one end, and the flexible capturing mechanism (5) is mounted on the end face at the other end; one end of the spring compression mechanism (4) is slidably connected to the inner wall of the other end of the shell (1), and the other end abuts against the end face of the capturing main body (3) at one end provided with the second convex teeth (321). The second convex teeth (321) are in contact with the first convex teeth (21), and the second convex teeth (321) are located in the first track (121), the second track (123) or between the two; the driving mechanism (2), the capturing main body (3) and the flexible capturing mechanism (5) are all connected with a traction rope (6), and the other end of the traction rope (6) is led out to the outside of the end of the shell (1) connected with the spring compression mechanism (4).

2. A flexible capture device for a heart mitral valve according to claim 1, characterized in that, The inner wall of the end of the shell (1) connected with the spring compression mechanism (4) is provided with a through hole along the axial direction of the shell (1), and the traction rope (6) passes through the through hole to the outside of the shell (1).

3. The flexible capture device of claim 1, wherein, The ends of the first convex teeth (21) and the second convex teeth (321) are all triangular, and when the second convex teeth (321) are located in the first track (121) or the second track (123), they are in contact with one inclined surface of the first convex teeth (21), and when the first convex teeth (21) are located in the variable track area (122), they are in contact with one inclined surface of the second convex teeth (321).

4. The flexible capture device of claim 1, wherein, The outer circumferential surface of the other end of the driving mechanism (2) is provided with a plurality of third convex teeth (22) uniformly distributed on the circumference, and the shell (1) is provided with a recess, and the third convex teeth (22) are clamped in the recess.

5. The flexible capture device of claim 1, wherein, The spring compression mechanism (4) comprises a spring mounting structure (41) and a spring (42), the spring mounting structure (41) is slidably connected with the shell (1) and the capturing main body (3), and the spring (42) is mounted on the spring mounting structure (41).

6. A flexible capture device for a heart mitral valve according to claim 5, characterized in that, The spring mounting structure (41) comprises a mounting disc (411) and a mounting column (412), one side of the mounting disc (411) is provided with a mounting column (412) along the axial direction of the shell (1), and the spring (42) is sleeved on the mounting column (412); the mounting column (412) is slidably connected with the shell (1), and the mounting disc (411) abuts against the capturing main body (3).

7. A flexible capture device for a heart mitral valve according to claim 6, characterized in that, The capture main body (3) comprises a convex tooth section (32) and a capture mechanism mounting section (31), the outer circumferential surface of the convex tooth section (32) is provided with second convex teeth (321), and the end surface of the capture mechanism mounting section (31) is mounted with a flexible capture mechanism (5); the inner diameter and the outer diameter of the capture mechanism mounting section (31) are both smaller than those of the convex tooth section (32), and the seating disc (411) is abutted against the stepped inner surface formed by the convex tooth section (32) and the capture mechanism mounting section (31).

8. The flexible capture device of claim 1, wherein, The flexible capture mechanism (5) comprises a plurality of long strip-shaped capture pieces, the capture pieces are bent towards the outside of the capture device as a whole to form a mounting area (51) and a bent area (52); the bent area (52) is provided with a through hole, and a traction rope (6) of the flexible capture mechanism (5) is fixed in the bent area through the through hole.

9. A flexible capture device for a heart mitral valve according to claim 8, characterized in that, The end surface of the capture main body (3) is provided with a plurality of circumferentially distributed arc-shaped grooves (311) and through holes, one end of the mounting area (51) is inserted into the arc-shaped groove (311), and the traction rope (6) of the flexible capture mechanism (5) is led out of the capture main body (3) through the through hole.

10. The flexible capture device of claim 1, wherein, The shell (1), the driving mechanism (2) and the capture main body (3) are made of TPU material, and the flexible capture mechanism (5) is made of PET material.

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