CN-114681150-B - Valve clip system, delivery device and release assembly therefor

CN114681150BCN 114681150 BCN114681150 BCN 114681150BCN-114681150-B

Abstract

The valve clamping system, the conveying device and the release assembly thereof are provided by the invention, the connector is provided with at least two clamping pieces extending towards the distal end, the at least two clamping pieces are arranged at intervals along the circumferential direction of the connector, at least one of the at least two clamping pieces is elastic, the constraint structure comprises a constraint ring, the constraint ring is detachably sleeved on the connector and can axially move relative to the connector, when the constraint ring moves from the proximal end to the distal end and towards the proximal end far away from the clamping pieces, the at least two clamping pieces clamp each other under the radial constraint of the constraint ring so as to clamp an implantation instrument, and when the constraint ring moves from the distal end to the proximal end and towards the proximal end near the clamping pieces, the radial constraint of the at least two clamping pieces is released, and the at least two clamping pieces are mutually opened so as to release the implantation instrument. The present invention provides a release assembly capable of releasing an implant device.

Inventors

WANG GANG
HUANG GUANGNIAN

Assignees

深圳市健心医疗科技有限公司
深圳市健心医疗科技有限公司

Dates

Publication Date: 20260421
Application Date: 20201231
Priority Date: 20201231

Claims (12)

1. A release assembly for controllably releasing an implant device having a connecting portion, wherein the release assembly comprises a connecting body having at least two jaws extending distally, the at least two jaws being spaced apart along a circumference of the connecting body and each having a mating portion, and at least one of the at least two jaws being resilient; The proximal end of the constraint structure is fixedly connected with the connector and comprises a constraint ring, the constraint ring is detachably sleeved on the connector and can axially move relative to the connector; The at least two jaws clip together under radial constraint of the confinement ring to clamp the implant device when the confinement ring is moved proximally and in a proximal direction away from the jaws, the confinement ring releasing the radial constraint of the at least two jaws when the confinement ring is moved proximally and in a proximal direction, the at least two jaws splay apart from each other to release the implant device and are separated from the implant device followed by withdrawal of the release assembly; The constraint structure further comprises a telescopic structure connected with the constraint ring, wherein a part of the constraint structure fixedly connected with the connector is positioned on one side of the proximal end of the telescopic structure, the constraint ring is positioned on one side of the distal end of the telescopic structure, and the telescopic structure enables the constraint ring to have a movement trend towards the distal end of the clamping piece relative to the part of the constraint structure fixedly connected with the connector; The release assembly further comprises an operation piece, the operation piece is connected with the constraint ring and can drive the constraint ring to move towards the proximal end side of the clamping piece, and the constraint ring can be staggered with the matching portion in the length direction of the clamping piece so as to release the radial constraint of the matching portion and the connecting portion by the constraint ring.
2. The release assembly of claim 1, wherein the at least two clips are each resilient members.
3. The release assembly of claim 1, wherein the engagement portion is removably coupled to the coupling portion of the insertion instrument in a radial direction of the insertion instrument, the coupling portion being axially constrained to the coupling body by engagement of the engagement portion with the coupling portion; the constraint ring is configured to radially constrain the mating portion of the insertion instrument along a radial direction of the constraint structure when the constraint ring is moved such that at least a portion thereof radially overlaps at least a portion of the connecting portion and at least a portion of the constraint ring radially overlaps at least a portion of the mating portion of the clip.
4. A release assembly according to claim 3, wherein the binding ring is moved such that at least a portion thereof radially overlaps at least a portion of the connecting portion and at least a portion of the binding ring radially overlaps at least a portion of the mating portion of the clip, the connecting portion overlapping at least a portion of the mating portion in a length direction of the clip.
5. A release assembly according to claim 3, wherein the confinement rings correspond to a central angle of greater than 180 °.
6. A release assembly according to claim 3, wherein the confinement ring is a closed annular member.
7. A release assembly according to claim 3, wherein one of the mating portion and the connecting portion is a projection and the other is a recess or a recess.
8. The release assembly of claim 1, wherein the proximal end of the constraining structure is fixedly coupled to the connector.
9. The release assembly of claim 1, wherein the telescoping structure is a cutting coil or a braided mesh tube.
10. The release assembly of claim 1, wherein the telescoping structure is in an axially contracted state when the release assembly is coupled to the insertion instrument.
11. A delivery device, characterized by a release assembly according to any one of claims 1 to 10.
12. A valve clasper system comprising an implantation instrument and the delivery device of claim 11, wherein the delivery device is detachably coupled to the implantation instrument via the release assembly, and wherein the coupling portion is disposed at a proximal end of the implantation instrument.

Description

Valve clip system, delivery device and release assembly therefor Technical Field The invention relates to the technical field of medical instruments, in particular to a valve clamping system, a conveying device and a release assembly thereof. Background Mitral valve disease is a common disorder in the elderly population, including two common types of mitral regurgitation and mitral stenosis, with mitral regurgitation being the most common. The incidence of mitral regurgitation is statistically up to 10% in people older than 75 years. Slight mitral regurgitation generally has no effect on normal life, while moderate or severe mitral regurgitation requires intervention treatment, and the traditional surgical treatment mode is chest opening treatment, and under the support of an extracorporeal circulation machine, the heart is opened to repair or replace the valve, but the high-risk patient cannot tolerate the valve. In recent years, the high-risk patients with mitral regurgitation are hoped for by interventional therapy, which is generally carried out by delivering an instrument to a lesion through a catheter to repair or replace a valve. At present, most transcatheter mitral valve replacement products are in clinical research stage, and the transcatheter mitral valve repair products generally adopt a clamping device to clamp two valve leaflets (anterior leaflet and posterior leaflet) of a mitral valve, so that the opening area of the valve is reduced, and the purpose of treating regurgitation is achieved. It is therefore desirable to provide a conveyor that is detachably connected to the clamping instrument such that the conveyor is capable of delivering the clamping instrument to the target portion and releasing the clamping instrument. Disclosure of Invention Based on this, the present invention provides a release assembly for releasing a clamping instrument. The present invention provides a release assembly for controllably releasing an insertion instrument, the release assembly comprising: a connector having at least two clips extending distally, the at least two clips being spaced apart along a circumference of the connector, and at least one of the at least two clips being resilient; the constraint structure comprises a constraint ring, wherein the constraint ring is detachably sleeved on the connector and can axially move relative to the connector; The at least two jaws clip together under radial constraint of the confinement ring to clamp the implant device when the confinement ring is moved proximally and in a proximal direction away from the jaws, and release the radial constraint of the at least two jaws when the confinement ring is moved proximally and in a proximal direction toward the jaws. When the release component is used, when the constraint ring moves from the proximal end to the distal end and in the proximal direction far away from the clamping pieces, the at least two clamping pieces clamp each other under the radial constraint of the constraint ring so as to clamp the implantation instrument, and when the constraint ring moves from the distal end to the proximal end and in the direction near the proximal ends of the clamping pieces, the radial constraint of the at least two clamping pieces is released by the constraint ring, and the at least two clamping pieces expand each other so as to release the implantation instrument. Drawings In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other embodiments of the drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic structural view of a valve clasper system of an embodiment; FIG. 2 is a schematic view of an embodiment valve clamping system with the clamp and delivery device separated; FIG. 3 is a schematic view of another embodiment valve clasper system in a configuration wherein the clasper is separated from the delivery mechanism; Fig. 4 is a schematic view of the structure of an embodiment valve clamping system with the support arms expanding the clamping arms, schematically showing the clasp expanding relative to the support arms under traction of the traction wire. Fig. 5 is the valve clasping system of fig. 4, schematically illustrating the clasp closed relative to the support arm when the pull wire releases the pull on the clasp. FIG. 6 is a schematic view of a delivery catheter of a delivery device in a valve clasper system in accordance with one embodiment; FIG. 7 is a schematic view of a release assembly of a valve clasping system in accordance with one embodiment in a disconnected state of a connector and a connector of an implantation instrument; FIG. 8 is a schema