Holder with magnetic device

Abstract

The present invention belongs to the technical field of medical devices, and particularly relates to a gripper. A gripper with a magnetic device comprises a converging device and a capturing device; the converging device is a hollow structure with open end faces and can converge the capturing device; the capturing device includes at least two capturing members, at least partially received in the converging device and capable of extending out of the converging device; further includes a magnetic device, the magnetic device includes: capturing member magnetic clips, respectively located on each capturing member; converging magnetic clips, having the same number as the capturing members, opposite in polarity to the capturing member magnetic clips, respectively detachably connected to the converging device, and opposite to the side surfaces of the corresponding capturing members. By arranging paired magnetic clips on the capturing members and the converging device, the present invention will form an attractive force or a repulsive force, so that the capturing members clamp the valve, avoiding damage caused by large friction when the capturing members are received into the converging device.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a gripper. Background Art

[0002] Heart valve disease is a common heart disease, referring to the lesions of the valves of the mitral valve, tricuspid valve, aortic valve and pulmonary valve due to rheumatic fever, mucoid degeneration, degenerative changes, congenital malformations, ischemic necrosis, infection or trauma, etc., which affect the normal flow of blood, resulting in abnormal heart function and ultimately leading to single-valve or multi-valve lesions of heart failure. In developed countries, the prevalence of heart valve disease is estimated to be 2.5%, which increases significantly after the age of 65. Among the elderly over 75 years old, 12.5% of people suffer from valve disease.

[0003] Common valve lesions include valve stenosis and valve insufficiency. The most common valve insufficiency is mitral regurgitation. Currently, for mitral regurgitation surgery, interventional treatment is the preferred method for many people. The interventional treatment methods for mitral valve include transcatheter mitral valve repair and transcatheter mitral valve replacement. Mitral valve repair can be further divided into three categories: leaflet plasty, annuloplasty, and artificial chordae tendineae implantation. There are mainly two access methods: through the femoral vein and through the apex via a small surgical incision. Leaflet plasty is based on the "edge-to-edge" principle and is the most mature mitral valve repair technology with the best clinical manifestations.

[0004] However, for the existing valve repair instruments currently, some repair instruments are laborious to pull back and tighten, which is likely to cause damage to the repair instruments. Seriously, a large amount of debris or microparticles will be generated. When the debris or microparticles remain in the patient's body and flow with the blood, they will block blood vessels and cause other complications. In addition, although some repair instruments solve the problem of laborious pulling back, they have complex structures. During the operation process, medical staff have cumbersome procedures, which increase the operation time and are prone to medical accidents. Summary of the Invention

[0005] Aiming at the technical problems that the existing valve repair instruments are likely to cause blood vessel blockage or other complications, or have complex structures and inconvenient operations, the present invention aims to provide a gripper with a magnetic device.

[0006] A gripper with a magnetic device includes a constriction device and a capture device;

[0007] The constriction device is a hollow structure with open end faces, and can constrict the capture device;

[0008] The capture device includes:

[0009] At least two capture members, at least partially constricted in the constriction device and extendable out of the constriction device;

[0010] The gripper with a magnetic device further includes a magnetic device, which includes:

[0011] Capture piece magnetic clips, respectively located on each of the capture pieces;

[0012] Converging magnetic clips, having the same number as the capture pieces, opposite in polarity to the capture piece magnetic clips, respectively detachably connected to the converging device, and opposite to the corresponding sides of the capture pieces.

[0013] The converging magnetic clips can move along the axial direction of the converging device on the side wall of the converging device.

[0014] The following are provided on the converging device:

[0015] Guide grooves, having the same number as the converging magnetic clips, uniformly arranged on the side wall of the converging device;

[0016] The converging magnetic clips are respectively slidably connected to a corresponding one of the guide grooves.

[0017] The following are also provided on the converging device:

[0018] Limit ports, having the same number as the converging magnetic clips, arranged on the side wall of the converging device, located outside the guide grooves;

[0019] First snap members, provided on the inner wall at the distal ends of the limit ports;

[0020] The following is provided at the distal end of the converging magnetic clip:

[0021] A second snap member, which is engaged and snapped with the first snap member;

[0022] When the distal end of the converging magnetic clip slides along the guide groove to the distal end of the converging device, the second snap member is engaged and snapped with the first snap member.

[0023] The following is also provided on the outer wall of the converging magnetic clip:

[0024] A magnetic clip connecting portion, used for detachably connecting to an external conveyor, and driven by the external conveyor to slide along the guide groove.

[0025] The converging magnetic clip includes:

[0026] A first converging magnetic plate, with the second snap member provided at the distal end;

[0027] A second converging magnetic plate, provided inside the first converging magnetic plate, having an axial length longer than that of the first converging magnetic plate, with the proximal end flush with the proximal end of the first converging magnetic plate, and the distal end protruding from the first converging magnetic plate;

[0028] When the second buckle is snap - connected to the first buckle, the first magnetic plate for gathering is flush with the outer wall of the gathering device.

[0029] Each of the capturing members includes:

[0030] A supporting elastic piece that can be engaged with the proximal end of the gathering device;

[0031] A first capturing piece, the proximal end of which is connected to the distal end of the supporting elastic piece and can be driven by the supporting elastic piece to move axially along the gathering device;

[0032] A second capturing piece, which is arranged opposite to the first capturing piece and can move axially along the gathering device and clamp or separate from the first capturing piece when moving;

[0033] At least one of the first capturing piece or the second capturing piece is provided with the magnetic clip of the capturing member.

[0034] The axial length of the limiting opening is greater than the axial length of the magnetic clip for gathering, and the proximal end of the limiting opening serves as a supporting opening to be engaged with the supporting elastic piece.

[0035] Both the first capturing piece and the second capturing piece are provided with the magnetic clips of the capturing member, and the magnetic clips of the capturing member on the first capturing piece and the magnetic clips of the capturing member on the second capturing piece have opposite polarities;

[0036] The magnetic clips of the capturing member on the first capturing piece and the second capturing piece near the magnetic clip for gathering have opposite polarities to the magnetic clip for gathering.

[0037] A clamp including a gathering device and a capturing device with a magnetic device;

[0038] The gathering device is a hollow structure with open end faces at both ends and can gather the capturing device;

[0039] The capturing device includes:

[0040] At least two capturing members, at least partially gathered in the gathering device and can extend out of the gathering device;

[0041] Each of the capturing members includes:

[0042] A supporting elastic piece that can be engaged with the proximal end of the gathering device;

[0043] A first capturing piece, the proximal end of which is connected to the distal end of the supporting elastic piece and can be driven by the supporting elastic piece to move axially along the gathering device;

[0044] A second capture piece, which is disposed opposite to the first capture piece and can move along the axial direction of the converging device, and clamps or separates from the first capture piece when moving.

[0045] It further includes a magnetic device, and the magnetic device includes:

[0046] Magnetic clamping pieces for the capture parts, which are respectively disposed on the first capture piece and the second capture piece;

[0047] The magnetic clamping piece for the capture part on the first capture piece and the magnetic clamping piece for the capture part on the second capture piece have opposite polarities.

[0048] The support elastic piece is made of at least one of a polymer elastomer or a metal material;

[0049] The metal material is one or a combination of several of a nickel-containing alloy, a titanium-containing alloy or stainless steel, and the metal material is preferably a nickel-titanium alloy.

[0050] The shape of the support elastic piece is one or a combination of a wave shape, an arch shape, a sawtooth shape or a polygon.

[0051] When the shape of the support elastic piece is a wave shape, the distance between two adjacent wave valleys on the support elastic piece is greater than the axial length of the support opening.

[0052] The support elastic piece is connected to the first capture piece through an elastic bending section, and the elastic bending section can be converged in the converging device. When the elastic bending section extends out of the converging device, the axial angle between the elastic bending section and the converging device is 80° - 160°.

[0053] The support elastic piece, the first capture piece and the elastic bending section are integrally formed.

[0054] Another elastic bending section is also disposed on the second capture piece.

[0055] At least one of the first capture piece or the second capture piece is provided with at least one friction piece, and the friction piece is disposed on the opposite surfaces of the first capture piece and the second capture piece to increase the friction force between the first capture piece and the second capture piece.

[0056] The friction piece is at least one of a protrusion, a blind hole or a through hole.

[0057] The friction piece adopts a sawtooth structure, and the sawtooth structures on the first capture piece and the second capture piece are meshed and cooperated to clamp the petal.

[0058] The friction member on the first capture sheet serves as the first friction member. The first friction member adopts a triangular prism structure. One of the quadrilateral bases of the first friction member is disposed on the first capture sheet. The two side surfaces of the first friction member are isosceles triangles, and the apex angle of the first friction member faces the second capture sheet.

[0059] The friction member on the second capture sheet serves as the second friction member. The second friction member adopts a triangular prism structure. One of the quadrilateral bases of the second friction member is disposed on the second capture sheet. The two side surfaces of the second friction member are triangular structures. Among the two included angles at the connection with the second capture sheet in the triangular structure, the included angle at the proximal end is the first included angle, and the included angle at the distal end is the second included angle. The angle of the first included angle is greater than the angle of the second included angle. The other included angle in the triangular structure away from the second capture sheet faces the first capture sheet.

[0060] The angle range of the first included angle is 80° - 110°.

[0061] The angle range of the other included angle is 45° - 75°.

[0062] The bottom spacing between two adjacent second friction members: the height of the second friction member is 1: 0.5 - 1.5.

[0063] A plurality of the second friction members are arranged in a row from the distal end to the proximal end on the second capture sheet. Along the proximal direction from the distal end of the second capture sheet, the heights of the plurality of second friction members gradually decrease.

[0064] The distal ends of the first capture sheet and the second capture sheet are both coated with capture sheet films.

[0065] The material of the capture sheet film is a polymer material or a natural pericardial material. The polymer material is at least one of expanded polytetrafluoroethylene, polyester, polyurethane, polypropylene, or silicone rubber.

[0066] The outer surfaces of the converging device and the capture device are coated with a porous film. The film is at least one of a polymer material or an inorganic non-metallic material.

[0067] The polymer material is one or a combination of several of polyethylene, polypropylene, polyurethane, or polyester. The inorganic non-metallic material is one or a combination of several of titanium carbide, titanium nitride, or titanium oxide.

[0068] At least one of the proximal ends of the support spring piece or the second capture sheet is provided with:

[0069] A capture member connection portion for detachably connecting to an external conveyor.

[0070] The positive and progressive effects of the present invention are as follows: The present invention uses a gripper with a magnetic device and has the following advantages:

[0071] 1. By arranging paired magnetic clips on the capture piece or the constriction device, an attractive force or a repulsive force is formed, so that the capture piece clamps the valve, avoiding damage caused by large friction when the capture piece is received into the constriction device.

[0072] 2. After at least part of the capture piece enters the constriction device, the elastic action of the support spring piece engages with the constriction device to ensure that the capture piece is fixed and will not be bounced back.

[0073] 3. The magnetic device can provide a continuous clamping force together with the support spring piece.

[0074] 4. After the capture piece clamps the valve leaf for a long time, the thickness of the valve leaf may become smaller. The support spring piece can gradually recover to the free state, and the first capture piece and the second capture piece can be further tightened to prevent the valve leaf from falling off.

[0075] 5. When the support spring piece engages with the constriction device, the contact is a smooth transition, and the two structures will not break due to too much stress and will not produce debris or particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 is a schematic diagram of an open state of the present invention;

[0077] Figure 2 is a cross-sectional view of the present invention;

[0078] Figure 3 is a schematic diagram of a constricted state of the present invention;

[0079] Figure 4 is another schematic diagram of a constricted state of the present invention;

[0080] Figure 5 is a schematic diagram of a structure of the constriction device of the present invention;

[0081] Figure 6 is Figure 5 a partial enlarged schematic diagram;

[0082] Figure 7 is a schematic diagram of a structure of the capture piece of the present invention;

[0083] Figure 8 is Figure 7 a partial enlarged schematic diagram;

[0084] Figure 9 is a schematic diagram of a structure of the first capture piece in an open state of the present invention;

[0085] Figure 10A structural schematic diagram when the first capture piece of the present invention is in a converged state;

[0086] Figure 11 is Figure 10 a schematic diagram of the other side;

[0087] Figure 12 A structural schematic diagram of the second capture piece of the present invention;

[0088] Figure 13 A structural schematic diagram of the converging magnetic clip of the present invention. Detailed implementation manners

[0089] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below with reference to specific illustrations.

[0090] Refer to Figures 1 to 4 , A clamp with a magnetic device, including a converging device 100, a capture device 200 and a magnetic device 300.

[0091] The converging device 100 is a hollow structure with open ends on both sides. The converging device 100 can converge the capture device 200, tightly converge the leaflets 400 captured by the capture device 200 inside it, and will not fall off during the opening and closing process of the valve. The structure of the converging device 100 can be a square barrel structure with an overall hollow cuboid structure, or a hollow cylinder structure or an elliptical cylinder structure, etc. The purpose of the converging device 100 is to converge the capture device 200 to clamp the valve, and the specific shape is not limited.

[0092] Refer to Figure 5 and Figure 6 , The converging device 100 is provided with a limiting port 110, a first fastening member 120 and a guiding groove 130. The number of the limiting port 110 and the guiding groove 130 is the same as the number of the converging magnetic clips 330. The limiting port 110 is uniformly arranged on the side wall of the converging device 100, the guiding groove 130 is arranged on the side wall of the converging device 100, and the limiting port 110 is located outside the guiding groove 130. Specifically, a through groove communicating inside and outside can be dug on the side wall of the converging device 100 to form the limiting port 110, and two axial sliding grooves can be dug along the outer side edge of the limiting port 110 on the inner wall of the converging device 100 as the guiding groove 130. The first fastening member 120 is arranged on the inner wall at the distal end of the limiting port 110.

[0093] The capturing device 200 is used to capture and clamp the valve leaflets 400 to prevent them from swinging freely. At least part of the capturing device 200 is received in the constraining device 100. The capturing device 200 of the present invention cooperates with the constraining device 100. The constraining device 100 tightens the capturing device 200 towards the middle, combines the two side valve leaflets 400 together, and tightly clamps the capturing device 200 to the valve leaflets 400, so that it will not fall off during the opening and closing of the valve.

[0094] Referring to Figures 1 to 4 , the capturing device 200 includes at least two capturing members. At least part of each capturing member is received in the constraining device 100 and can extend out of the constraining device 100. Each capturing member is used to capture the end of the valve leaflet 400 floating in the heart. Each capturing member includes a first capturing piece 211, a second capturing piece 212, a supporting elastic piece 220, and a capturing member connecting portion 230.

[0095] The proximal end of the first capturing piece 211 is connected to the distal end of the supporting elastic piece 220. The supporting elastic piece 220 drives the first capturing piece 211 to move axially along the constraining device 100. The first capturing piece 211 and the second capturing piece 212 are oppositely arranged. The second capturing piece 212 can move axially along the constraining device 100. When the second capturing piece 212 moves, it clamps or separates from the first capturing piece 211. The first capturing piece 211 and the second capturing piece 212 can also be connected. When capturing the valve leaflet 400, the first capturing piece 211 and the second capturing piece 212 rotate to form an angle and open, but do not completely separate.

[0096] Referring to Figures 7 to 12 , at least one friction member 213 is provided on at least one of the first capturing piece 211 or the second capturing piece 212. The friction member 213 is arranged on the opposite surfaces of the first capturing piece 211 and the second capturing piece 212 to increase the friction force between the first capturing piece 211 and the second capturing piece 212 and prevent the valve leaflet 400 from slipping off under force. The friction member 213 is at least one of a protrusion, a blind hole, or a through hole. The shape of the protrusion can be hemispherical, conical, strip-shaped, etc. The size and specific shape of the blind hole or through hole are not limited. When the friction member 213 is a protrusion, preferably 3 to 10 protrusions are provided.

[0097] Referring to Figure 7 and Figure 8, in the present invention, the friction member 213 provided on the first capture sheet 211 serves as the first friction member 2131, and the friction member 213 provided on the second capture sheet 212 serves as the second friction member 2132. During actual use, the first capture sheet 211 is placed near the valve leaflet by an external conveyor. The first capture sheet 211 serves to lift the valve leaflet, and the second capture sheet 212 is continuously pushed distally. When the valve leaflet is in a suitable position on the first capture sheet 211, the first capture sheet 211 and the second capture sheet 212 are pulled back, and the first friction member 2131 and the second friction member 2132 cooperate with each other to clamp the valve leaflet, preventing the valve from falling off due to heart contraction during the later use of the gripper.

[0098] Both the first friction member 2131 and the second friction member 2132 can adopt a serrated structure, and the serrated structure of the first friction member 2131 and the serrated structure on the second friction member 2132 mesh with each other to clamp the valve leaflet.

[0099] Refer to Figure 8 , the first friction member 2131 can also adopt a triangular prism structure. One of the quadrilateral bases in the first friction member 2131 is provided on the first capture sheet 211. The two side surfaces of the first friction member 2131 are isosceles triangles, and the apex angle of the first friction member 2131 faces the second capture sheet 212.

[0100] Refer to Figure 8 , the second friction member 2132 can also adopt a triangular prism structure. One of the quadrilateral bases in the second friction member 2132 is provided on the second capture sheet 212. The two side surfaces of the second friction member 2132 are triangular structures. Among the two included angles at the connection with the second capture sheet 212 in the triangular structure, the included angle at the proximal end is the first included angle a, and the included angle at the distal end is the second included angle b. The angle of the first included angle a is greater than the angle of the second included angle b. The other included angle c in the triangular structure away from the second capture sheet 212 faces the first capture sheet 211. The angle range of the first included angle a is 80° - 110°. The angle range of the other included angle c is 45° - 75°. The bottom spacing L between adjacent second friction members 2132: the height H of the second friction member 2132 is 1:0.5 - 1.5. This height H refers to the distance between the other included angle c in the triangular structure and the second capture sheet 212. Preferably, a plurality of second friction members 2132 are arranged in a row from the distal end to the proximal end on the second capture sheet 212, and along the proximal direction from the distal end of the second capture sheet 212, the height H of the plurality of second friction members 2132 gradually decreases.

[0101] The distal ends of the first capture sheet 211 and the second capture sheet 212 are both coated with a capture sheet coating 214. The material of the capture sheet coating 214 is a polymer material or a natural pericardium material. The polymer material is at least one of expanded polytetrafluoroethylene, polyester, polyurethane, polypropylene, or silicone rubber.

[0102] Referring to Figures 1 to 4 and Figures 9 to 11 , the support elastic piece 220 can be engaged with the proximal end of the converging device 100. The purpose of the support elastic piece 220 is to fix a part of the capture device 200 in the converging device 100, so that the captured piece is not easily loosened again after clamping the leaflet 400. The distal end of the support elastic piece 220 is connected to the proximal end of the captured piece. Preferably, the distal end of the support elastic piece 220 is connected to the proximal end of the first capture piece 211. Specifically, in implementation, the support elastic piece 220 and the first capture piece 211 can be integrally formed of the same material. The support elastic piece 220 is made of at least one of a polymer elastomer or a metal material. The metal material is one or a combination of a nickel-containing alloy, a titanium-containing alloy, or stainless steel. The metal material is preferably a nickel-titanium alloy, and the nickel-titanium alloy has superelasticity and can well meet the requirements of deformation elastic recovery. The shape of the support elastic piece 220 is one or a combination of a wavy shape, an arched shape, a serrated shape, or a polygonal shape. As long as it can provide an elastic force for the support elastic piece 220 to engage with the converging device 100, its specific shape is not limited to the above several. When the shape of the support elastic piece 220 is wavy, the distance between two adjacent wave valleys on the support elastic piece 220 is greater than the axial length of the support opening 140.

[0103] The support elastic piece 220 and the first capture piece 211 are connected by an elastic bending section 215. The elastic bending section 215 can be converged in the converging device 100. When the elastic bending section 215 extends out of the converging device 100, the axial angle d between the elastic bending section 215 and the converging device 100 is 80° - 160°. This angle d can be selected as 90° or 150°. This angle d is preferably 100° - 135°, and more preferably 110°, 120°, or 130°. The design of the elastic bending section 215 can, when the captured piece extends out of the converging device 100 as shown in Figure 1 and presents an open state, keep the direction of the captured piece and the end of the leaflet 400 substantially the same, which is convenient for capturing the leaflet 400. Preferably, the support elastic piece 220, the first capture piece 211, and the elastic bending section 215 are integrally formed.

[0104] Another elastic bending section 216 is also provided on the second capture piece 212. The elastic bending section 216 divides the second capture piece 212 into a proximal part and a distal part. Similarly, when the second capture piece 212 is converged in the converging device 100, the elastic bending section 216 is substantially parallel to the axis of the converging device 100. When the distal end of the second capture piece 212 extends out of the converging device 100, the axial angle between the elastic bending section 216 and the converging device 100 is 80° - 160°.

[0105] At least one proximal end of the support elastic piece 220 or the second capture piece 212 is provided with a capture piece connection part 230, and the capture piece connection part 230 is used for detachably connecting with an external conveyor. The capture piece connection part 230 can be an external thread or a clamping piece, etc., so that when the support elastic piece 220 or the second capture piece 212 is connected to the external conveyor, the connection method can be one of thread connection, clamping connection or socket connection, etc., to ensure the stability of the clamping and conveying and releasing of the invention.

[0106] During specific use, after the first capture piece 211 and the second capture piece 212 clamp the valve leaflet 400, use an external conveyor to pull the support elastic piece 220 and the second capture piece 212 back to the inside of the converging device in the proximal direction. When the support elastic piece 220 moves to the support opening 140 at the proximal end of the converging device 100, the radial pressure of the converging device 100 on the wavy support elastic piece 220 decreases. Under the action of the outward restoring force, the support elastic piece 220 moves outward along the support opening 140 to the outside of the converging device 100, and the support elastic piece 220 is clamped at the support opening 140, preventing the valve leaflet 400 from generating a pulling force on the first capture piece 211 and the second capture piece 212 during the opening and closing process, which may pull the capture device 200 out of the converging device 100 and cause the valve to escape and the clamping failure.

[0107] The outer surfaces of the converging device 100 and the capture device 200 are coated with a porous film. The purpose of having a porous film is that the porous material can provide a growth environment for endothelial cells, promote the proliferation of endothelial cells, accelerate the endothelialization of the surface of the clamp of the present invention, and moderate endothelialization of the surface can improve tissue compatibility, thereby reducing the formation of thrombus.

[0108] The film is at least one of a polymer material or an inorganic non-metallic material. The polymer material is one or a combination of polyethylene, polypropylene, polyurethane or polyester, and the inorganic non-metallic material is one or a combination of titanium carbide, titanium nitride or titanium oxide. The purpose of using the above inorganic non-metallic material for the film is to provide a smooth surface, so that substances such as fibrin, platelets, white blood cells and red blood cells that are prone to form thrombus are not easily adhered, thereby preventing the formation of surface thrombus.

[0109] In one embodiment, referring to Figure 2 、 Figure 3 、 Figures 9 to 12 , the magnetic device 300 includes a capture piece magnetic clip and a converging magnetic clip 330.

[0110] When a capture piece magnetic clip is provided on the first capture piece 211, the capture piece magnetic clip on the first capture piece 211 serves as the first magnetic clip 310. The polarities of the first magnetic clips 310 on the multiple first capture pieces 211 can be the same, preferably opposite. The first magnetic clip 310 can be located on the surface or inside of the first capture piece 211.

[0111] When a capture piece magnetic clip is provided on the second capture piece 212, the capture piece magnetic clip on the second capture piece 212 serves as the second magnetic clip 320. The polarities of the second magnetic clips 320 on the multiple second capture pieces 212 can be the same, preferably opposite, so that when clamping the leaflet 300, multiple mutually attracting capture pieces achieve the best clamping effect. When the polarities of the multiple second magnetic clips 320 are the same, the second capture piece 212 can adopt a capture piece with a fan-shaped cross-section, and the central angle of each second capture piece 212 is 360 / N, where N is the number of second capture pieces 212. Such a design can form a structure with a circular cross-section by enclosing multiple second capture pieces 212, and it is also convenient for various second capture pieces 212 to independently extend or retract into the converging device 100. The second magnetic clip 320 can be located on the surface or inside of the second capture piece 212. The polarities of the first magnetic clip 310 and the second magnetic clip 320 are opposite. For example, when the first magnetic clip 310 is an N-polarity magnetic clip, the second magnetic clip 320 is an S-polarity magnetic clip, so that the first magnetic clip 310 and the second magnetic clip 320 can attract each other. Each first magnetic clip 310 is arranged opposite to the corresponding second magnetic clip 320.

[0112] The polarities of the converging magnetic clips 330 can be the same, preferably opposite. The polarities of the converging magnetic clips 330 are opposite to the polarities of the adjacent capture piece magnetic clips. For example, when the first magnetic clip 310 is an N-polarity magnetic clip, the converging magnetic clip 330 is an S-polarity magnetic clip. The converging magnetic clips 330 are respectively detachably connected to the converging device 100, and the converging magnetic clips 330 are opposite to the sides of the corresponding capture pieces, so that when the capture pieces are converged in the converging device 100, the converging magnetic clips 330 and the first magnetic clips 310 are attracted to each other.

[0113] The converging magnetic clips 330 can move along the axial direction of the converging device 100 on the side wall of the converging device 100. Preferably, the converging magnetic clips 330 are respectively slidably connected to a corresponding guiding groove 130. The axial length of the limiting opening 110 inside the guiding groove 130 is greater than the axial length of the converging magnetic clip 330, and the proximal end of the limiting opening 110 serves as a supporting opening 140 to engage with the supporting elastic piece. When the converging magnetic clip 330 slides along the guiding groove 130 to the distal end of the converging device 100, a supporting opening 140 for accommodating and engaging the supporting elastic piece 220 can be left between the proximal end of the converging magnetic clip 330 and the proximal end of the limiting opening 110.

[0114] The distal end of the converging magnetic clip 330 is provided with a second buckle 331, and the second buckle 331 is engaged with the first buckle 120. When the distal end of the converging magnetic clip 330 slides along the guiding groove 130 to the distal end of the converging device 100, the second buckle 331 is engaged with the first buckle 120. Refer to Figure 1 , a magnetic clip connecting portion 332 is further provided on the outer wall of the converging magnetic clip 330, and the magnetic clip connecting portion 332 is used for detachably connecting with an external conveyor, and the external conveyor drives the converging magnetic clip 330 to slide along the guiding groove 130.

[0115] Refer to Figure 13 , the converging magnetic clip 330 includes a first converging magnetic plate 333 and a second converging magnetic plate 334. The distal end of the first converging magnetic plate 333 is provided with a second buckle 331, the second converging magnetic plate 334 is arranged inside the first converging magnetic plate 333, the axial length of the second converging magnetic plate 334 is longer than that of the first converging magnetic plate 333, the proximal end of the second converging magnetic plate 334 is flush with the proximal end of the first converging magnetic plate 333, and the distal end of the second converging magnetic plate 334 extends out of the first converging magnetic plate 333. When the second buckle 331 is engaged with the first buckle 120, the first converging magnetic plate 333 is flush with the outer wall of the converging device 100. In the present invention, since the limiting opening 110 is opened on the side of the converging device 100, and the guiding groove 130 is located on both sides inside the limiting opening 110, through the design of the first converging magnetic plate 333 and the second converging magnetic plate 334, the converging magnetic clip 330 can be conveniently slidably connected to the converging device 100, the sliding position of the converging magnetic clip 330 can be limited, and the slotting difficulty of the limiting opening 110 and the guiding groove 130 is reduced.

[0116] In one embodiment, the magnetic device 300 of the present invention may also only include a capturing magnetic clip, that is, the converging magnetic clip 330 is not provided on the converging device 100. The capturing magnetic clip includes a first magnetic clip 310 and a second magnetic clip 320.

[0117] The first capturing piece 211 is provided with a first magnetic clip 310, and the polarities of the first magnetic clips 310 on the plurality of first capturing pieces 211 may be the same, preferably opposite. The first magnetic clip 310 may be located on the surface or inside of the first capturing piece 211.

[0118] A second magnetic clip 320 is provided on the second capture piece 212. The polarities of the second magnetic clips 320 on multiple second capture pieces 212 can be the same, preferably opposite, so that when clamping the valve leaflet 300, multiple capture pieces attracting each other can achieve the best clamping effect. When the polarities of multiple second magnetic clips 320 are the same, the second capture piece 212 can adopt a capture piece with a fan-shaped cross-section, and the central angle of each second capture piece 212 is 360 / N, where N is the number of second capture pieces 212. Such a design can enclose multiple second capture pieces 212 into a structure with a circular cross-section, and it is also convenient for various second capture pieces 212 to independently extend or retract into the converging device 100. The second magnetic clip 320 can be located on the surface or inside of the second capture piece 212. The polarity of the first magnetic clip 310 is opposite to that of the second magnetic clip 320. For example, when the first magnetic clip 310 is an N-polar magnetic clip, the second magnetic clip 320 is an S-polar magnetic clip, so that the first magnetic clip 310 and the second magnetic clip 320 can attract each other. Each first magnetic clip 310 is arranged opposite to the corresponding second magnetic clip 320.

[0119] On the side wall of the converging device 100, multiple support ports 140 can also be provided, and the number of support ports 140 is the same as the number of capture members. The support spring piece 220 can be detachably connected to the support port 140 in a snap-fit manner.

[0120] Embodiment 1: Refer to Figures 1 to 3 , the converging device 100 adopts a square barrel-shaped structure with both ends open and hollow inside. The capture device 200 is provided with two relatively independent capture members, and the support spring piece 220 of each capture device 200 adopts a wavy shape and has multiple wave peaks and wave valleys. The external conveyor is detachably connected to the support spring piece 220 of each capture member, the proximal end of the second capture piece 212, and the outer wall of the converging magnetic clip 330 respectively.

[0121] In the initial stage of use, the capture device 200 is linearly compressed and converged inside the converging device 100. The gripper of the present invention is conveyed to the template position of the atrium, such as the mitral valve and tricuspid valve, through an external conveyor. At this time, the gripper of the invention is in the initial state. The external conveyor passes the capture member including the first capture piece 211 and the second capture piece 212 through the distal end of the converging device 100, and the external conveyor also pushes the converging magnetic clip 330 distally. The converging magnetic clip 330 moves from the proximal end of the converging device 100 to the distal end of the converging device 100, and the converging magnetic clip 330 is snap-connected to the distal end of the converging device 100, leaving a support port 140 for accommodating the support spring piece 220 at the proximal end.

[0122] After the capture piece breaks free from the restraint of the constriction device 100, it opens to both sides under the action of the resilience force and assumes an L shape. The external conveyor continues to push the second capture piece 212 distally. A gap is formed between the first capture piece 211 and the second capture piece 212 to form a clamping opening. After the valve leaf 400 moves into the clamping opening, the first capture piece 211 and the second capture piece 212 block its movement. The second capture piece 212 is pulled back proximally. The second capture piece 212 and the first capture piece 211 clamp the valve leaf 400. Under the suction force of the second magnetic clip 320 and the first magnetic clip 310, the valve leaf 400 is further clamped. The capture device 200 is pulled back, and the capture device 200 gradually enters the constriction device 100. Under the suction force of the first magnetic clip 310 and the constriction magnetic clip 330, the capture piece is firmly constricted within the constriction device 100.

[0123] The support spring piece 220 retains a part of the elastic potential energy through its own material properties and structural shape. After the valve leaf 400 is clamped and the capture piece is constricted into the constriction device 100, the support spring piece 220 engages with the constriction device 100 and releases part of the elastic potential energy, thereby fixing the entire capture device 200. The purpose of the support spring piece 220 is to automatically restore elasticity and remain stuck in the constriction device 100. In this embodiment, multiple wave shapes are provided for the support spring piece 220 to adjust the axial position of the support spring piece 220 in the constriction device 100, drive the capture piece to move axially along the constriction device 100, and thus adjust the magnitude of the clamping force. As a result, the first capture piece 211 and the second capture piece 212 of the capture piece are under the extrusion action of the side wall of the constriction device 100, and the capture device 200 clamps the valve leaf 400.

[0124] During the process of capturing the valve leaf 400, since the two capture pieces are relatively independent, when one valve leaf 400 is in the clamping opening between the first capture piece 211 and the second capture piece 212 of one of the capture pieces, the current valve leaf 400 can be clamped first, and then the relative positions of the first capture piece 211 and the second capture piece 212 of the other capture piece can be adjusted to clamp the other valve leaf 400 separately. By performing these two operations separately, more capture opportunities can be found, the surgical operation time can be saved, and the surgical operation difficulty can be reduced.

[0125] Finally, confirm whether the clamping of the valve leaf 400 is ideal. If the clamping is ideal, withdraw the external conveyor to complete the clamping of the valve leaf 400. If the clamping is not ideal, pull the constriction magnetic clip 330 back proximally again, extrude the support spring piece 220 from the support opening 140, and then repeat the initial actions, such as pushing the constriction magnetic clip 330 and the capture piece, recapturing the valve leaf 400, and clamping the valve leaf 400.

[0126] In addition, as the clamping of the leaflet 400 lasts for a longer time, the leaflet 400 may atrophy and become thinner, and gaps may appear between the leaflet 400 and the first capture piece 211 and the second capture piece 212, resulting in a decrease in the clamping force. After the support elastic piece 220 in the present invention engages with the support opening 140, the deformed part recovers, and there is still some elastic potential energy not released. If the clamping force decreases, the support elastic piece 220 continues to release the elastic potential energy and resumes deformation, so that the first capture piece 211 and the second capture piece 212 continue to move proximally, and the lateral force between the first capture piece 211, the second capture piece 212 and the constriction device 100 increases, thereby enabling the gripper of the present invention to maintain sufficient clamping force and prevent the leaflet from falling off.

[0127] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A holder with a magnetic device, comprising a converging device and a capturing device; It is characterized in that The converging device is a hollow structure with open ends on both sides, capable of converging the capturing device; The capturing device includes: At least two capturing members, at least partially converged by the converging device and capable of extending out of the converging device; It further includes a magnetic device, and the magnetic device includes: Capturing member magnetic clips, respectively located on each of the capturing members; Converging magnetic clips, having the same number as the capturing members, with opposite polarities to the capturing member magnetic clips, respectively detachably connected to the converging device, and opposite to the corresponding capturing member sides, and the converging magnetic clips can move along the axial direction of the converging device on the side wall of the converging device; Each of the capturing members includes: A supporting spring piece, capable of engaging with the proximal end of the converging device; A first capturing piece, the proximal end of which is connected to the distal end of the supporting spring piece, and can be driven by the supporting spring piece to move along the axial direction of the converging device; A second capturing piece, arranged opposite to the first capturing piece, capable of moving along the axial direction of the converging device, and clamping or separating from the first capturing piece when moving; At least one of the first capturing piece or the second capturing piece is provided with the capturing member magnetic clip.

2. The holder with a magnetic device according to claim 1, characterized in that, The following are provided on the converging device: Guide grooves, having the same number as the converging magnetic clips, uniformly arranged on the side wall of the converging device; The converging magnetic clips are respectively slidably connected to a corresponding one of the guide grooves.

3. The holder with a magnetic device according to claim 2, characterized in that, The following are also provided on the converging device: Limit openings, having the same number as the converging magnetic clips, arranged on the side wall of the converging device, outside the guide grooves; A first buckle member, arranged on the inner wall at the distal end of the limit opening; The following is provided at the distal end of the converging magnetic clip: A second buckle member, cooperating with the first buckle member for clamping connection; When the distal end of the converging magnetic clip slides along the guide groove to the distal end of the converging device, the second buckle member is clamped and connected to the first buckle member.

4. The holder with a magnetic device according to claim 3, characterized in that, The converging magnetic clip includes: A first converging magnetic plate, with the second buckle member provided at the distal end; A second converging magnetic plate, arranged inside the first converging magnetic plate, with an axial length longer than that of the first converging magnetic plate, the proximal end being flush with the proximal end of the first converging magnetic plate, and the distal end extending out of the first converging magnetic plate; When the second buckle member is clamped and connected to the first buckle member, the first converging magnetic plate is flush with the outer wall of the converging device.

5. The holder with a magnetic device according to claim 2, wherein The following is also provided on the outer wall of the converging magnetic clip: A magnetic clip connection part, used for detachably connecting with an external conveyor, and being driven by the external conveyor to slide along the guide groove.

6. The holder with a magnetic device according to claim 3, characterized in that, The axial length of the limit opening is greater than the axial length of the converging magnetic clip, and the proximal end of the limit opening serves as a supporting opening to engage with the supporting spring piece.

7. The holder with a magnetic device according to claim 1, wherein, Both the first capturing piece and the second capturing piece are provided with the capturing member magnetic clips, and the capturing member magnetic clip on the first capturing piece has an opposite polarity to the capturing member magnetic clip on the second capturing piece; The capture piece magnetic clip on the first capture piece and the second capture piece, which is close to the converging magnetic clip, has the opposite polarity to the converging magnetic clip.

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