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CN-119837678-B - Transcatheter implantation instrument for valve repair

CN119837678BCN 119837678 BCN119837678 BCN 119837678BCN-119837678-B

Abstract

The invention relates to a transcatheter implantation instrument for valve repair, which comprises a filling part, a capturing part and a clamping part, wherein the filling part comprises a filling main body and two supporting pieces, the two supporting pieces are arranged at the distal end of the filling main body, each supporting piece comprises an inner arm and an outer arm, the filling main body, the inner arms and the outer arms are sequentially connected along the axial direction of the filling main body, each capturing part comprises two elastic clamps, each elastic clamp is connected with a corresponding inner arm, the clamping part comprises a plurality of clamping bodies arranged along the circumferential direction of the filling main body, the distal end of each clamping body is connected with the distal end of the supporting piece, the proximal end of each clamping body is movably connected with the corresponding inner arm and/or outer arm through at least one connecting piece, and each inner arm and/or each outer arm is respectively connected with at least one clamping body along two sides of the circumferential direction of the filling main body. Therefore, the clamping and fastening effect of the instrument on the valve leaflet can be improved, and the instrument can be applicable to the valve leaflet with different sizes.

Inventors

  • LIU XIANG
  • WANG SIQI
  • ZHAO JING
  • WEN JING
  • WEI YONGQIANG

Assignees

  • 江苏臻亿医疗科技有限公司

Dates

Publication Date
20260508
Application Date
20231018

Claims (9)

  1. 1. A transcatheter implantation instrument for valve repair, comprising: The filling component comprises a filling main body and two supporting pieces, wherein the two supporting pieces are arranged at the distal end of the filling main body, each supporting piece comprises an inner arm and an outer arm, and the filling main body, the inner arms and the outer arms are sequentially connected along the axial direction of the filling main body; A catching part comprising two elastic clips, each of which is connected with a corresponding one of the inner arms, and A clamping component comprising a plurality of clamping bodies arranged along the circumferential direction of the filling body, wherein the distal end of each clamping body is connected with the distal end of the supporting piece, the proximal end of each clamping body is movably connected with the corresponding inner arm and/or outer arm through at least one connecting piece, and any one of the inner arm and/or outer arm is respectively connected with at least one clamping body along two sides of the filling body in the circumferential direction; The connecting piece is of a flexible structure or a rigid structure, so that the clamping position and the clamping direction of the clamping body can be adjusted, and in a closed state, any one of the inner arms and/or the outer arms and all the clamping bodies connected with the inner arms and/or the outer arms and all the connecting piece can encircle target tissues and take on a convex shape.
  2. 2. The transcatheter implantation device for valve repair of claim 1, wherein a proximal end of each of the clamp bodies is movably connected to the corresponding inner arm and/or outer arm by one of the connectors.
  3. 3. A transcatheter implantation device for valve repair according to claim 2, wherein the connection point of one side of any one of the inner arms to the connector is provided on the same circumference or on a different circumference than the connection point of the other side of the inner arm to the connector, and/or wherein the connection point of one side of any one of the outer arms to the connector is provided on the same circumference or on a different circumference than the connection point of the other side of the outer arm to the connector.
  4. 4. The transcatheter implantation device for valve repair according to claim 1, wherein one end of the connector is movably sleeved on the corresponding eyelet of the inner arm and/or the outer arm, and the other end is movably sleeved on the corresponding connecting hole of the clip body, or the connector is movably threaded into the corresponding inner arm and/or the outer arm and then threaded out from one side of the corresponding inner arm and/or the outer arm in the circumferential direction, and then is movably threaded into and out of the corresponding connecting hole of the clip body to form a ring.
  5. 5. The transcatheter implantation device for valve repair of claim 4, wherein the connection hole penetrates the clip in a thickness direction of the clip, the thickness of the clip being a dimension in a clip target tissue direction.
  6. 6. The transcatheter implantation device for valve repair according to claim 1 or 2, wherein the number of the clamping bodies is four, one each being connected to either one of the inner arms and/or the outer arms on both sides in the circumferential direction of the filling body, the four clamping bodies being arranged in pairs symmetrically with respect to the filling body.
  7. 7. A transcatheter implantation instrument for valve repair according to claim 1 or 2, wherein the transcatheter implantation instrument has at least an expanded state, a captured state and a closed state, and is convertible between these states.
  8. 8. The transcatheter implantation device for valve repair according to claim 1 or 2, wherein at least one row of barbs is provided on each of the clips, the row of barbs being distributed along the circumference of the clip, the row of barbs being located closer to or farther from the central axis of the filling body in the radial direction of the filling body than the location of the connectors below the clip.
  9. 9. The transcatheter implantation device for valve repair according to claim 1 or 2, wherein each of said spring clips is provided with at least one row of barbs, said row of barbs being circumferentially distributed along said spring clip, said barbs comprising a first barb and a second barb, said first barb having a length greater than a length of said second barb.

Description

Transcatheter implantation instrument for valve repair Technical Field The invention relates to the field of medical instruments, in particular to a transcatheter implantation instrument for valve repair. Background Mitral and tricuspid valves are two very important valves in the heart, and are an important heart structure that allows heart blood to pass back through the left atrium to the left ventricle or the right atrium to the right ventricle, similar to a check valve, and mitral regurgitation or tricuspid regurgitation is a phenomenon in which blood flows back from the ventricle to the atrium due to poor closure of the mitral or tricuspid valve, and this regurgitation can cause the risk of heart failure in patients, severely affecting the daily life and work of the patients. Mitral regurgitation or tricuspid regurgitation are the two most common conditions in heart valve disease, and are relatively cumbersome to treat, costly, often with open chest surgery, and at a significant surgical risk. Another way of treating mitral regurgitation or tricuspid regurgitation is via catheter-mediated minimally invasive surgery, by implanting an implantation instrument into the heart of a patient via a catheter delivery system, the effect of edge-to-edge double orifice repair of the mitral valve or tricuspid valve She Tiege is achieved, thereby effecting inhibition of mitral regurgitation or tricuspid regurgitation, and achieving the effect of treating mitral regurgitation or tricuspid regurgitation conditions in the patient. The conventional mitral valve or tricuspid valve transcatheter implantation instrument is usually a mechanical clamp or an elastic clamp for clamping the mitral valve or tricuspid valve leaflet to realize edge-to-edge repair, so that the inhibition of mitral regurgitation or tricuspid valve regurgitation is realized, and the treatment effect of mitral regurgitation or tricuspid valve regurgitation is achieved. Mechanical fasteners typically include a linkage mechanism for effecting the opening, capturing and locking action of the implant, a pair of mechanical clips with a plurality of barbs for effecting the capturing, securing, and pulling the leaflets to an intermediate abutment for effecting the edge-to-edge dual hole repair, and a locking mechanism for effecting the closing and locking of the implant configuration after the final implant has been clamped in the edge-to-edge configuration. The elastic clamp and the mechanical clamp are structurally different, and are mainly composed of an elastic spacer body, a pair of elastic clamps and a pair of elastic clamps, wherein the elastic spacer body is used for slowing down a valve She Yingli generated when the elastic clamp is clamped to the middle of a valve leaf and is attached to the middle of the valve leaf, the valve She Silie is avoided, the elastic clamps are used for repairing the valve She Buzhuo and pulling the valve leaf to the middle of the valve leaf to achieve a double-hole repairing state of edge to edge, the elastic support clamp body is also used for achieving supporting of the elastic spacer body and tightening of a closing state, and the elastic clamp is guaranteed to achieve three states of unfolding, capturing and closing. While the resilient clip generally provides the ability for the clip to individually control individual catches. In addition, some clips are attached and captured by adopting double-layer clips, and the treatment effect of inhibiting mitral valve or tricuspid valve reflux by adopting a lifting locking structure can also be realized by double-hole repair. The mechanical clamp is easy to cause larger clamping stress, so that the valve She Silie of the valve is caused, the elastic clamp is clamped tightly by the elastic force of the elastic element due to the clamping force, and if the clamping force is unsuitable or irreversible or reversible plastic deformation occurs in the working process of the elastic element, the capturing range of the valve leaflet is changed, the application range of the valve leaflet can be influenced, the final clamping effect can be influenced, and the treatment effect of mitral regurgitation or tricuspid regurgitation after final implantation is influenced. The main barb that the current elasticity clutch realized pressing from both sides tight spacing effect, barb embedding lamella, the area of contact of barb is little, and spacing effect is limited, causes lamella She Silie easily, influences the tight effect of clamp, leads to the valve to tear or edge to edge laminating is not tight, increases the risk that mitral regurgitation or tricuspid valve regurgitation relapse. It should be noted that the information disclosed in the background section of this application is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known t