CN217660296U - Docking device for catching ring, catching ring and valve leaf capturing system - Google Patents

Abstract

The utility model relates to a interfacing apparatus, catch ring and leaflet system of catching for catching ring, wherein interfacing apparatus includes: the fishing device comprises a first connecting piece and a second connecting piece, wherein the first connecting piece can be arranged at the near end of a fishing ring, and a first through hole is formed in the middle of the first connecting piece; the second connecting piece can be arranged at the far end of the conveying pipe, and a second through hole is formed in the middle of the second connecting piece; and a connecting core wire slidably disposed in the second through hole; the first connecting piece can with the second connecting piece joint, just connect the core silk can by the second through-hole penetrates extremely in the first through-hole for carry on spacingly to it in the axial of conveyer pipe and footpath when delivering the ring of catching. The utility model discloses can conveniently carry out butt joint once more to catching the ring in order to adjust its anchoring position, improve the operation flexibility in the doctor art, save operation time.

Description

Docking device for catching ring, catching ring and valve leaf capturing system

Technical Field

The utility model relates to a medical instrument field for the heart art especially relates to a interfacing apparatus, catch ring and valve leaflet capture system for catching ring.

Background

The heart includes four pump chambers, the left and right atria and the left and right ventricles, respectively, each having a valve controlling its one-way outflow. The mitral valve (mitral valve) is positioned between the left atrium and the left ventricle, and when the ventricles contract, the mitral valve can tightly close the atrioventricular orifice to prevent blood from flowing back into the left atrium; located between the right atrium and right ventricle is the tricuspid valve (tricuspid valve), which when the right ventricle contracts squeezes blood in the chamber to impact the tricuspid valve to close, preventing backflow of blood into the right atrium.

A properly functioning mitral or tricuspid valve ensures proper blood circulation throughout the heart cycle, but Mitral Regurgitation (MR) or Tricuspid Regurgitation (TR) can occur when the leaflets of the valve fail to come into full contact (coaptation) due to disease; on the other hand, abnormal cardiac structures may also be the cause of reflux, and these two processes may accelerate abnormal cardiac function due to "synergy".

Currently, standard heart valve regurgitation treatments typically require the selection of surgical procedures, and standard surgical repair or replacement procedures require open heart surgery, the use of cardiopulmonary bypass, and cardiac arrest, and because of the invasive nature of these procedures, death, stroke, bleeding, respiratory problems, kidney problems, and other complications are common, patients are often rejected or judged as unsuitable for traditional open surgery due to high risk.

In recent years, the search for transcatheter mitral/tricuspid valve replacement therapy for regurgitation has been motivated by the successful advancement of aortic valve replacement procedures. However, mitral/tricuspid replacement is more difficult than aortic replacement in many ways, such as mitral/tricuspid that is not a traditional circle in spatial structure, mitral/tricuspid that has a more complex tissue structure (annulus, leaflets, chordae tendineae, papillary muscles), mitral/tricuspid that is larger than aortic, and is more elongated in shape, mitral/tricuspid leaflet is softer, mitral/tricuspid fails to provide good retention for the replacement valve compared to aortic stenosis or calcification, and also risks of displacement if the replacement valve fails to establish adequate anchoring at the annulus due to the sharp rise of pressure in the ventricle when the ventricle contracts. Thus, effective mitral/tricuspid replacement therapy for regurgitation is not only subject to large cyclical loads from the mitral/tricuspid valve, but more importantly, establishes a stable and strong anchor.

In order to enhance the radial supporting force provided by the native valve leaflet to the valve stent, so that the valve stent is firmly fixed at the valve leaflet, a catching ring is usually added on the outer part of the valve leaflet, and the catching ring can hold the valve leaflet and the supporting frame together. However, the implantation process of the traditional catching ring is complex, especially the fixing and releasing process of the catching ring cannot adapt to the repeatability in the operation, when the shape of the catching ring cannot be matched with the contour of the valve leaf, the catching ring cannot be butted again to adjust the anchoring position of the catching ring, so that the catching ring and the valve support may be displaced in the heart cycle, the risk of valve displacement exists, and the treatment fails.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a interfacing apparatus, catch ring sum valve leaf capture system for catching ring aims at solving the technical problem who exists among the prior art.

The utility model adopts the following technical proposal:

in one aspect, the utility model provides a interfacing apparatus for catching ring, include:

-a first connector connectable to the proximal end of the fishing ring; the middle part of the first connecting piece is provided with a first through hole along the axial direction, and the first connecting piece comprises a first clamping groove and a first clamping body;

-a second connector connectable to a distal end of a conveying pipe for conveying the fishing ring; the middle part of the second connecting piece is provided with a second through hole along the axial direction, and the second connecting piece is provided with a second clamping groove and a second clamping body which are matched with the first clamping body and the first clamping groove;

-a connecting core wire slidably arranged in the first and second through holes;

the first clamping body can be inserted into the second clamping groove, and the second clamping body can be inserted into the first clamping groove, so that the first connecting piece is clamped with the second connecting piece and used for limiting the fishing ring in the axial direction of the conveying pipe when the fishing ring is delivered; the connecting core wire can penetrate into the first through hole through the second through hole and is used for limiting the fishing ring in the radial direction of the conveying pipe when the fishing ring is delivered.

As a preferred technical scheme, the first connecting piece comprises a first fixing part, the first fixing part is tubular, and the first connecting piece can be connected to the near end of the fishing ring through the first fixing part;

the second connecting piece includes the second fixed part, the second fixed part is the tubulose, and the second connecting piece can be connected in the distal end of conveyer pipe through the second fixed part.

As a preferred technical scheme, the first clamping groove is in a semi-tubular shape and extends outwards along the axial direction from the first fixing part, and the first clamping body is arranged at the other end of the first clamping groove; the second clamping groove is in a semi-tubular shape and extends outwards along the axial direction from the second fixing part, and the second clamping body is arranged at the other end of the second clamping groove.

As a preferred technical scheme, the first clamping body and the second clamping body are both tubular, the outer contour of the first clamping body is matched with the inner contour of the second clamping groove, and the outer contour of the second clamping body is matched with the inner contour of the first clamping groove.

As a preferable technical solution, the length of the first card slot is the same as the length of the second card body, and the length of the second card slot is the same as the length of the first card body.

As a preferred technical scheme, the inner diameters of the first through hole and the second through hole satisfy: when the first connecting piece is clamped with the second connecting piece, the core wire can penetrate into the second through hole from the first through hole.

Preferably, the first connecting member is made of biocompatible metal or polymer material with developability, and comprises nickel-titanium alloy, stainless steel or an injection molding member added with barium sulfate.

As a preferred technical scheme, the first fixing part is provided with a first through hole, the near end of the fishing ring is provided with a first through groove communicated with the first through hole, the first through groove and the first through hole are connected through a tether in a sewing mode, and the tether is made of a material with biocompatibility.

On the other hand, this application provides a catch ring, and the near-end of catching the ring is equipped with first connecting piece, still is equipped with distal end protection piece at the distal end of catching the ring, and distal end protection piece head end is hemispherical for protect myocardial tissue at catch ring propelling movement in-process.

As a preferable technical scheme, the far-end protection piece is provided with a second through hole, and the far end of the fishing ring is provided with a second through groove communicated with the second through hole, and the second through groove is connected with the second through hole through a tether in a sewing mode.

Preferably, the distal protection member is made of a biocompatible metal or a polymeric material having developability, and includes a nickel-titanium alloy, stainless steel, or an injection molding member added with barium sulfate.

The utility model discloses still further relate to a leaflet capturing system, include as above arbitrary the ring of catching to and conveyor, conveyor is including being used for delivering catch the conveyer pipe of ring, the distal end of conveyer pipe is equipped with the second connecting piece, wears to be equipped with the connection core silk in the conveyer pipe.

As a preferred technical scheme, the far end of the conveying pipe is fixedly connected with the second connecting piece.

The utility model discloses a technical scheme can reach following beneficial effect: the utility model discloses a butt joint device comprises a first connecting piece, a second connecting piece and a connecting core wire, wherein the first connecting piece and the second connecting piece can be respectively arranged at the near end of the fishing ring and the far end of the conveying pipe for delivering the fishing ring, and the first connecting piece and the second connecting piece are mutually clamped through a detachable structure so as to axially limit the fishing ring; the through holes are formed in the first connecting piece and the second connecting piece, and the connecting core wire can be arranged in the two through holes in a penetrating mode so as to limit the fishing ring in the radial direction. Through interfacing apparatus, not only make to catch the ring and deliver the in-process more stable, still make the release of catching the ring more convenient. Meanwhile, in the operation process, if the fishing ring is not anchored at a proper position according to the operation expectation or the actual structure of the valve of the patient, the fishing ring can be conveniently butted again through the butting device so as to adjust the anchoring position of the fishing ring, the operation flexibility of a doctor in the operation is improved, and the operation time of the operation is saved. Further, the utility model also provides a catch ring, above-mentioned first connecting piece and distal end protection piece can fix with catching the ring body through the tie line of biocompatible material preparation, have simplified the preparation technology who catches the ring, and distal end protection piece can be catching the ring and delivering the in-process and effectively protecting cardiac muscle tissue, avoid causing the damage.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below to form a part of the present invention, and the exemplary embodiments and the description thereof of the present invention explain the present invention and do not form an improper limitation to the present invention. In the drawings:

fig. 1 is a schematic structural view of a docking device in a preferred embodiment disclosed in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a first connecting member in a preferred embodiment disclosed in embodiment 1 of the present invention;

fig. 3 is a perspective view of a first connecting member according to a preferred embodiment disclosed in embodiment 1 of the present invention;

fig. 4 is a schematic structural view of a second connecting member in a preferred embodiment disclosed in embodiment 1 of the present invention;

fig. 5 is a perspective view of a second connecting member in a preferred embodiment disclosed in example 1 of the present invention;

fig. 6 is a schematic view of a docking device in a docking state according to a preferred embodiment disclosed in embodiment 1 of the present invention;

FIG. 7 is a schematic structural view of a fishing ring in a preferred embodiment disclosed in embodiment 2 of the present invention;

fig. 8 is a schematic structural view of a distal end protector according to a preferred embodiment disclosed in example 2 of the present invention;

fig. 9 is a schematic structural view of a fishing ring placed outside a mitral valve according to a preferred embodiment of the present invention disclosed in example 2.

Description of reference numerals:

a fishing ring 10, a delivery tube 20, a mitral valve 30; a first connecting member 40, a first slot 41, a first clamping body 42, a first through hole 43, a first fixing portion 44, and a first through hole 45; a second connector 50, a second card slot 51, a second card body 52, a second through hole 53, and a second fixing portion 54; a connecting core wire 60; a tether 70; a distal protector 80, a second through-hole 81; left atrium 90, left ventricle 100.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. In the description of the present invention, it is noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to solve the problems in the prior art, the embodiment of the application provides a docking device for a fishing ring, the fishing ring and a valve leaflet capturing system, wherein the docking device comprises a first connecting piece, a second connecting piece and a connecting core wire; the first connecting piece can be connected to the near end of the fishing ring; the middle part of the first connecting piece is provided with a first through hole along the axial direction, and the first connecting piece comprises a first clamping groove and a first clamping body; the second connecting piece can be connected to the far end of the conveying pipe for conveying the fishing ring; the middle part of the second connecting piece is provided with a second through hole along the axial direction, and the second connecting piece is provided with a second clamping groove and a second clamping body which are matched with the first clamping body and the first clamping groove; the connecting core wire is slidably arranged in the second through hole; the first clamping body can be inserted into the second clamping groove, and the second clamping body can be inserted into the first clamping groove, so that the first connecting piece and the second connecting piece are clamped and connected, and the first clamping body and the second clamping body are used for limiting the fishing ring in the axial direction of the conveying pipe when the fishing ring is delivered; the connecting core wire can penetrate into the first through hole through the second through hole and is used for limiting the delivery fishing ring in the radial direction of the conveying pipe.

Example 1

Taking mitral valve implantation as an example, this embodiment 1 provides a docking device for a fishing ring to solve the technical problems in the prior art. According to fig. 1-7, 9, the above-mentioned docking means comprises a first connector 40 provided at the proximal end of the fishing ring 10, a second connector 50 provided at the distal end of the transfer pipe 20 for transferring the fishing ring 10, and a connecting core wire 60. Wherein the catching ring 10 is positioned at the chordae tendineae of the native mitral valve 30 in a substantially helical shape for anchoring the stent of the artificial heart valve implanted in the mitral valve 30 to prevent the stent from shifting during the cardiac cycle; the delivery tube 20 is used to connect the proximal end of the capture ring 10 by delivering the delivery tube 20 forward so that the two pass through the guide catheter together and place the capture ring 10 at the appropriate site, withdrawing the connecting core wire 60 after the capture ring 10 is fully positioned outside the mitral valve 30 to release the capture ring 10, and finally implanting and securing the prosthetic heart valve stent. The artificial heart valve stent is in a contraction state before being implanted, and reaches a preset shape or size through self expansion, balloon expansion or mechanical expansion, so that the artificial heart valve stent continuously and stably retains the valve stent at a proper position by means of the catching ring 10 and tissues between the catching ring 10 and the catching ring, and the risk of valve displacement is avoided, but if the catching ring 10 is not in a proper position/shape in the operation, the artificial heart valve stent and the valve stent can not be normally matched to cause the displacement of the stent or even the operation fails, the delivery pipe 20 and the catching ring 10 need to be connected again through a docking device, and the position or the shape of the catching ring 10 is further adjusted.

According to fig. 2 and 3, the docking device comprises a first connector 40, a second connector 50 and a connecting core wire 60, wherein:

the first connecting piece 40 is fixedly connected to the proximal end of the fishing ring 10, preferably, the first connecting piece 40 includes a first fixing portion 44, a first clamping groove 41 and a first clamping body 42, wherein the first fixing portion 44 is nested in the proximal end of the fishing ring 10 in a tubular shape, the first clamping groove 41 is formed by extending the first fixing portion 44 outwards in the axial direction, the first clamping groove 41 is in a substantially semi-tubular shape, the first clamping body 42 is arranged at the other end of the first clamping groove 41, and specifically, the semi-tubular shape is a shape that a circular tube is divided into two parts in the axial direction; a first through hole 43 is axially arranged in the middle of the first connecting member 40, the first through hole 43 penetrates through the first fixing portion 44 and the first clamping body 42, the inner diameter of the first through hole 43 arranged in the first clamping body 42 is smaller, the first through hole is used for penetrating the connecting core wire 60 and limiting the fishing ring 10 in the radial direction, and the inner diameter of the first through hole 43 arranged in the first fixing portion 44 is larger, and the fishing ring 10 can be accommodated and fixedly connected with the first through hole.

In a preferred embodiment, the first fixing portion 44 of the first connecting member 40 is provided with a first through hole 45, a first through groove matched with the first through hole 45 is formed at the proximal end of the catching ring 10, and the first through hole 45 and the first through groove are connected by sewing a plurality of tying threads 70; preferably, the first through hole 45 has the same inner diameter as the first through groove, so as to avoid the first connecting piece 40 and the fishing ring 10 from being undesirably displaced, and thus the connection between the first connecting piece and the fishing ring is more stable; preferably, the first through hole 45 and the first through groove may be rectangular or elliptical, and the length direction of the first through hole 45 and the first through groove is consistent with the axial direction of the first connecting member 40, and meanwhile, a plurality of tie lines 70 are sewn between the first through hole 45 and the first through groove to increase the stability of the first through hole and the first through groove; in other embodiments, the number of the first through holes 45 and the first through grooves is not limited to two, and a plurality of first through holes may be provided, and the stability of the connection between the first connecting member 40 and the fishing ring 10 may also be increased, but this scheme may reduce the strength of the first connecting member 40 or increase the process difficulty; in a more preferred embodiment, each first through hole 45 and each first through groove are sewn by 2-4 tying threads 70, so as to balance the stability of the connection and the ease of manufacturing. Meanwhile, in order to avoid the occurrence of undesired rejection reaction of the myocardial tissue, it is preferable to use the tether 70 made of a biocompatible material to increase its safety performance, and specifically, the tether 70 made of nitinol, polymer, fiber, or other high molecular material may be used.

Preferably, the inner diameter of the fixing part of the first connecting element 40 is matched with the outer diameter of the proximal end of the fishing ring 10, and the two are in interference fit or transition fit, so that the friction force between the two is enhanced, and the connection stability of the two is further improved.

Preferably, to determine the exact location of the proximal end of the fishing ring 10 during surgery, the first connector 40 may be made of any biocompatible metal or polymeric material that is developable, preferably nickel titanium, stainless steel, or an injection molded part with barium sulfate added.

Referring to fig. 4-5, the second connector 50 is fixedly connected to the distal end of the delivery tube 20, specifically by welding, bonding, etc.; preferably, the second connector 50 includes a second fixing portion 54, a second engaging groove 51 and a second engaging body 52, wherein the second fixing portion 54 is tubular and extends axially outward from the second fixing portion 54 to form the second engaging groove 51, the second engaging groove 51 is substantially semi-tubular, and the second engaging body 52 is disposed at the other end of the second engaging groove 51; a second through hole 53 is axially formed in the middle of the second connector 50, the second through hole 53 penetrates through the second fixing portion 54 and the second clamping body 52, wherein the second through hole 53 formed in the second clamping body 52 has a smaller inner diameter for extending and retracting the connecting core wire 60, and the second through hole 53 formed in the second fixing portion 54 has a larger inner diameter for accommodating and fixedly connecting the conveying pipe 20.

In a preferred embodiment, the first card body 42 and the second card body 52 are both tubular, the first through hole 43 and the second through hole 53 are respectively axially inserted into the middle portions of the first card body and the second card body, the first card slot 41 and the second card slot 51 are substantially semi-tubular, and the first card body 42 and the second card body 52 can be respectively clamped in the second card slot 51 and the first card slot 41; preferably, the first engaging groove 41 and the second engaging groove 51 are not absolutely semi-tubular, and the radian thereof is not greater than pi, so as to ensure that the second card body 52 and the first card body 42 can freely enter and exit the first engaging groove or the second engaging groove 51, and preferably, the radian of the first engaging groove 41 and the second engaging groove 51 is not less than pi/6, so as to ensure that the engaging grooves can provide enough supporting strength for the card bodies.

Preferably, the length of first draw-in groove 41 is isometric with the length of second card body 52 to guarantee that second card body 52 can carry out free joint and release with first draw-in groove 41, and the interior profile of first draw-in groove 41 agrees with mutually with the outline of second card body 52, in order to guarantee the laminating that can stabilize behind the two joint, prevent to catch ring 10 and send the in-process vibration, lead to placing the position inaccurate artificial heart valve support of being difficult to anchor, more preferably, the internal diameter of first draw-in groove 41 is the same with the external diameter of second card body 52, for transition fit behind the two joint, its connection is more stable.

Preferably, the length of the second clamping groove 51 is equal to the length of the first clamping body 42, so as to ensure that the second clamping groove 51 is freely clamped and released, the inner contour of the second clamping groove 51 is matched with the outer contour of the first clamping body 42, so as to ensure that the second clamping groove and the first clamping body can be stably jointed after being clamped, and the fishing ring 10 is prevented from vibrating in the delivery process, more preferably, the inner diameter of the second clamping groove 51 is the same as the outer diameter of the first clamping body 42, and the second clamping groove and the first clamping body are in transition fit after being clamped, so that the connection is more stable.

As can be seen from the above description, the size of the first card body 42 must match the size of the second card slot 51, and the size of the second card body 52 must match the size of the second card slot 51, so that the sizes of the first card body 42 and the second card body 52 may be the same or different, and the size of the first card slot 41 and the size of the second card slot 51 may be the same or different; in a preferred embodiment, the first and second clamping bodies 42 and 52 have the same size, and the first and second clamping grooves 41 and 51 have the same size, so that the first and second connecting members 40 and 50 can be more adaptive, and the normal use of the docking device is not affected even if the fishing rings 10 of different models are replaced.

The connecting core wire 60 penetrates through the conveying pipe 20, can be fed forward and retracted, and penetrates between the first through hole 43 and the second through hole 53, when the first connecting piece 40 is clamped with the second connecting piece 50, the connecting core wire 60 penetrates through the second through hole 53 of the second connecting piece 50 from the conveying pipe 20 and continuously extends into the first through hole 43, so that the fishing ring 10 is limited in the radial direction; preferably, the inner diameters of the first through hole 43 and the second through hole 53 may be different, but it is necessary to ensure that the connecting core wire 60 is not blocked or jammed when penetrating into the first through hole 43 from the second through hole 53; further, the inner diameters of the first through hole 43 and the second through hole 53 are not smaller than the diameter of the connecting core wire 60, so as to ensure that the connecting core wire 60 can move freely in the two, and at the same time, the inner diameters are not too large, otherwise, the connecting core wire 60 is easy to move undesirably in the connecting core wire, and the radial limiting effect is affected.

In this embodiment, when the fishing ring 10 is delivered, the delivery pipe 20 and the fishing ring 10 are butted by the butting device in advance, and the delivery pipe 20 and the fishing ring 10 reach the mitral valve 30 through the guide catheter to release the fishing ring 10, because the fishing ring 10 has shape memory, after the release of the fishing ring is completed, the connecting core wire 60 is withdrawn, the fishing ring 10 is elastically deformed, so that the first connecting piece 40 and the second connecting piece 50 are automatically separated; if the fishing ring 10 is not in the preset position after the continuous observation in the operation, the conveying pipe 20 is extended forwards, the first connecting piece 40 is butted with the second connecting piece 50, and the core wire 60 is extended forwards at the same time, so that the conveying pipe 20 is connected with the fishing ring 10 again, and the position or the shape of the fishing ring 10 is further adjusted.

Example 2

Still taking mitral valve implantation as an example, referring to fig. 7-9, in this embodiment, a capture ring 10 is provided for stable interaction with and stable anchoring in place of an implanted prosthetic valve stent, avoiding mutual displacement of the two during the cardiac cycle, and reducing the risk of surgical failure.

The proximal end of the capture ring 10 is provided with the first connector 40 as described in embodiment 1 above, and in a preferred embodiment, the distal end of the capture ring 10 is further provided with a distal protector 80 for protecting myocardial tissue during delivery of the capture ring 10; preferably, the distal protection member 80 may be made of any biocompatible metal or polymer material with developability, and may be made of nickel titanium, stainless steel or an injection molding member with barium sulfate added thereto, for observing the position of the distal end of the fishing ring 10 during the operation.

In a preferred embodiment, the distal protection member 80 has a generally hemispherical end to facilitate movement of the distal end of the fishing ring 10, and a more blunt hemispherical end that is safer, while providing smooth and myocardial tissue protection to the distal end of the fishing ring 10 during the pushing process.

Preferably, the other end of the distal protector 80 is substantially cylindrical and has an inner diameter substantially identical to the outer diameter of the distal end of the fishing ring 10, so that the two are in interference fit and are more secure; in a more preferred embodiment, a second through hole 81 is formed at the joint of the distal end protection member 80 and the fishing ring 10, a second through groove matched with the second through hole 81 is formed at the distal end of the fishing ring 10, and the second through hole 81 and the second through groove are connected by sewing a plurality of tying threads 70; preferably, the second through hole 81 has the same inner diameter as the second through groove to prevent the fishing ring 10 and the distal protector 80 from being misaligned or loosened; furthermore, a plurality of tying threads 70 are sewn between the second through hole 81 and the second through groove to increase the stability of the two; in other embodiments, the number of the second through holes 81 and the second through grooves is not limited to two, and a plurality of through holes may be provided, so as to increase the stability of the connection between the first connecting member 40 and the catching ring 10; in a more preferred embodiment, 2 to 4 tie lines 70 are sewn between each second through hole 81 and each second through groove, so as to balance the stability of the connection between the two and the ease of manufacturing. Further, in this embodiment, the tether 70 made of the same material as that of embodiment 1 may be used, and specifically, the tether 70 made of nitinol, polymer, fiber, or other polymer material may be used.

Preferably, the harvesting ring 10 is provided with an atrial section positioned in the left atrium 90 configured to generally follow the curvature of the atrial wall for providing radial tension, a transitional section, a functional section, and a ventricular section; the functional segment is positioned at the valve ring of the native mitral valve 30, is coiled, and can provide radial contraction force for supporting a prosthetic valve stent implanted in the mitral valve 30; the ventricular segment is extended by the functional segment and joined to the left ventricle 100, also providing radial contractile forces, and is configured in a curved shape that generally follows the curvature of the chordae tendineae of the native mitral valve 30; the transition segment is configured to extend from the functional segment to the atrial segment located in the left atrium 90.

In a preferred embodiment, in order to observe and determine the placement position of the fishing ring 10 during the operation, it is necessary to determine whether the spatial position is accurate or not by the position of a plurality of developing rings. In order to facilitate the determination of the spatial position of the leaflet capturing device during the implantation process, the developing rings are preferably arranged at the upper end and the lower end of the transition section of the capturing ring 10 and are used for prompting the movement of the capturing ring 10 from the left atrium 90 side to the left ventricle 100 side during the operation process; preferably, the development ring can be made of any biocompatible metal or polymeric material with development property, preferably nickel titanium, stainless steel or injection molding with barium sulfate added, and is fixed outside the fishing ring 10 by bonding, sewing or welding.

Example 3

Still taking the mitral valve implantation as an example, in the present implementation, there is provided a leaflet capturing system comprising the capturing ring 10 as described in embodiment 2 above, and further comprising a delivery device, preferably comprising an operating handle and a delivery tube 20, having attached to the distal end of the delivery tube 20 a second connector 50 as described in embodiment 1 above, and a connecting core wire 60 passing through the delivery tube 20, wherein the second connector 50 is detachably connected, preferably snap-connected, to the first connector 40 at the proximal end of the capturing ring 10.

When the valve leaflet capturing system is used, a guide catheter is firstly conveyed to a natural valve, the conveying pipe 20 is conveyed towards the far end through the operating handle to drive the capturing ring 10 to fix the valve leaflets of the mitral valve 30, after the capturing ring 10 is arranged at a proper position, the connecting core wire 60 is retracted, so that the second connecting piece 50 at the far end of the conveying pipe 20 is separated from the first connecting piece 40 at the near end of the capturing ring 10, the capturing ring 10 is released, and then the artificial heart valve support is implanted and fixed; if the fishing ring 10 is not located at the preset position during the operation, the conveying pipe 20 is continuously extended forwards through the operating handle, so that the first connecting piece 40 is butted with the second connecting piece 50, and meanwhile, the core wire 60 is extended forwards, so that the conveying pipe 20 is connected with the fishing ring 10 again, and the position or the shape of the fishing ring 10 is further adjusted.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims (11)

1. A interfacing apparatus for fishing rings, comprising:

-a first connector connectable to a proximal end of the fishing ring; the middle part of the first connecting piece is provided with a first through hole along the axial direction, and the first connecting piece comprises a first clamping groove and a first clamping body;

-a second connector connectable to a distal end of a conveying pipe for conveying the fishing ring; a second through hole is formed in the middle of the second connecting piece along the axial direction, and the second connecting piece is provided with a second clamping groove and a second clamping body which are matched with the first clamping body and the first clamping groove;

-a connecting core wire slidably arranged in said first and second through holes;

the first clamping body can be inserted into the second clamping groove, and the second clamping body can be inserted into the first clamping groove, so that the first connecting piece is clamped with the second connecting piece and used for limiting the fishing ring in the axial direction of the conveying pipe when the fishing ring is delivered; the connecting core wire can penetrate into the first through hole from the second through hole and is used for limiting the fishing ring in the radial direction of the conveying pipe when the fishing ring is delivered.

2. The docking device as claimed in claim 1, wherein the first connector comprises a first fixing portion, the first fixing portion being tubular, the first connector being connectable to the proximal end of the fishing ring by the first fixing portion;

the second connecting piece includes the second fixed part, the second fixed part is the tubulose, the second connecting piece can pass through the second fixed part is connected in the distal end of conveyer pipe.

3. The docking device as claimed in claim 2, wherein the first engaging groove is semi-tubular and extends axially outward from the first fixing portion, and the first engaging body is disposed at the other end of the first engaging groove; the second clamping groove is in a semi-tubular shape and extends outwards along the axial direction from the second fixing part, and the second clamping body is arranged at the other end of the second clamping groove.

4. The docking device as claimed in claim 3, wherein the first card body and the second card body are both tubular, and an outer contour of the first card body fits an inner contour of the second card slot, and an outer contour of the second card body fits an inner contour of the first card slot.

5. The docking device as claimed in claim 4, wherein the first card slot has a length equal to a length of the second card body, and the second card slot has a length equal to a length of the first card body.

6. The docking device as claimed in any one of claims 1 to 5, wherein the first through hole and the second through hole have inner diameters satisfying: when the first connecting piece is clamped with the second connecting piece, the connecting core wire can penetrate into the first through hole from the second through hole.

7. The docking device as claimed in claim 3, wherein the first fixing portion has a first through hole, and a first through groove is formed at a proximal end of the catching ring and communicates with the first through hole, the first through groove and the first through hole are connected by a tether, and the tether is made of a biocompatible material.

8. A fishing ring comprising the docking device for a fishing ring as claimed in any of claims 1-7, the fishing ring having a first connector at a proximal end and a distal protector at a distal end, the distal protector having a hemispherical head end for protecting myocardial tissue during pushing of the fishing ring.

9. The fishing ring of claim 8, wherein the distal protector defines a second through-hole, and a second through-slot communicating with the second through-hole is defined at the distal end of the fishing ring, and the second through-slot and the second through-hole are sewn together by a tether.

10. A leaflet capturing system comprising the catching ring of claim 8 or 9 and a delivery device comprising a delivery tube for delivering the catching ring, the delivery tube having a second connector at a distal end thereof, the delivery tube having the connecting core wire threaded therethrough.

11. The capture system of claim 10, wherein the distal end of the delivery tube is fixedly coupled to the second connector.

Images