CN215130901U

CN215130901U - Anchoring mechanism applied to cardiac implant

Info

Publication number: CN215130901U
Application number: CN202120566797.7U
Authority: CN
Inventors: 吕世文; 徐进; 王青杰
Original assignee: Jenscare Scientific Co Ltd
Current assignee: Jenscare Scientific Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-12-14
Anticipated expiration: 2031-03-19

Abstract

The application relates to the field of medical instruments, in particular to an anchoring mechanism applied to a cardiac implant, which comprises a puncture piece, an anchor and a pressing piece, wherein the anchor is arranged in the puncture piece, the pressing piece and the needle pricking piece are both in preset shapes, and when the anchoring is performed, the anchor and the pressing piece are restored to the preset shapes after the puncture piece is punctured into a target position firstly; the puncture piece firstly punctures the inside of the cardiac tissue, just can contact with the cardiac tissue and anchor when the needle piece stretches out from the passageway of puncture piece, avoid the too early bending of needle piece simultaneously, can ensure the degree of depth of needle piece in the cardiac tissue to ensure its anchoring force, avoid anchoring mechanism and cardiac tissue to take place the risk of pulling off, simultaneously, the piece that compresses tightly on the puncture piece has ensured anchoring mechanism and has been taken place fixed connection between the region by the anchoring, avoided anchoring mechanism and by the region emergence drop of anchoring.

Description

Anchoring mechanism applied to cardiac implant

Technical Field

The application belongs to the field of medical equipment, and particularly relates to an anchoring mechanism applied to a cardiac implant.

Background

Tricuspid valve regurgitation is generally caused by pulmonary hypertension, right ventricular enlargement and tricuspid valve annular dilation, and is clinically commonly represented by the causes of the tricuspid valve regurgitation (left heart failure, pulmonary hypertension and the like), and the symptoms of right heart failure such as tricuspid valve regurgitation, hypodynamia, ascites, edema, liver pain, dyspepsia, anorexia and the like are aggravated. Mild regurgitation of the tricuspid valve has no obvious clinical symptoms, but surgical treatment is required when there is severe regurgitation.

Traditional treatment approaches for mitral and tricuspid valve disease include medications for mild to severe regurgitation, and surgical procedures with corresponding surgical indications. Wherein the surgical method further comprises a valve replacement procedure and a valve repair procedure. In surgical procedures, typical open chest, open heart surgery is too invasive, requiring extracorporeal circulation to be established, with a high incidence of complications and risk of infection. Many patients do not tolerate the enormous surgical risk and can only remain indefinitely at risk for death.

With the first report of aortic valve intervention replacement, many companies have done a lot of work on interventional aortic valve technology, and the technology is mature. However, there remains a significant gap in the industry in the interventional treatment of atrioventricular valves. Although a few products currently exist for the interventional treatment of atrioventricular valves for transcatheter valvuloplasty and repair, no mature product is yet internationally available for transcatheter valve replacement.

Patent CN202020465893.8 discloses a valve ring-contracting device, comprising an anchor, a tightening wire, wherein the anchor comprises an anchoring needle and a tension sheet; the anchoring needle comprises a puncture head, a connecting rod and a base, and the puncture head is used for puncturing the inner wall of the ventricle; the connecting rod is provided with a limiting installation groove, and the tensioning sheet is sleeved outside the connecting rod and clamped in the limiting installation groove; the middle part of the base is provided with a stringing hole for a stringing wire to pass through; the bottom of the base is provided with a connecting hole detachably connected with a pushing rod of the conveying device. The disadvantages of this design are: the blades on the tension sheet have limited opening angle in the tissue, so that the anchoring force between the puncture head and the tissue is limited, and the anchoring elements are easy to pull out from the tissue.

Patent CN201610921114.9 discloses a cardiac implant fixed by ventricular septum and its delivery and release method, wherein the cardiac implant is anchored to the ventricular septum by a fixing member, and as can be seen from the drawings and the related description in the specification, the fixing member is an anchoring needle with a preset shape, and during delivery, the anchoring needle is compressed in the sheath tube, and the anchoring needle is pushed to make the needle tip enter the tissue and restore to an "anchor" shape and fixed in the heart; although the structure is simple and easy to realize, the structure has a plurality of defects: there are two requirements for the anchoring needle to obtain sufficient anchoring force: 1. the anchoring needle is to be fully advanced into the tissue; 2. the larger the curvature of the preset shape of the anchoring needle is, the stronger the anchoring force is; however, in practical practice, when the curvature of the anchor needle is large, the anchor needle will move rapidly toward the needle head when entering the tissue, so that the needle head of the anchor needle will rapidly penetrate the tissue after entering the tissue, and the anchor needle can only be anchored with a small part of the tissue, cannot be fully inserted into the tissue, and is easily pulled out of the tissue.

Therefore, the person skilled in the art is dedicated to develop an anchoring mechanism for application on a cardiac implant, mainly solving the following problems: how to keep the anchoring mechanism in a larger curvature and ensure the length of the anchoring mechanism remaining in the heart tissue so as to obtain enough anchoring force.

SUMMERY OF THE UTILITY MODEL

The object of the present application is to provide an anchoring mechanism for application on a cardiac implant, which has the following advantages: 1. the anchoring piece and the puncture piece are mutually matched and anchored, so that the puncture piece can be set into a shape with larger curvature and can also penetrate into the tissue for anchoring; 2. the pressing piece has the advantages that the anchoring mechanism is effectively prevented from falling off from the anchored area, meanwhile, the mounting groove can save the loading space for the whole device, and loading and conveying are facilitated.

In order to solve the technical problem, the application is solved by the following technical scheme: the anchoring mechanism comprises a puncture piece, an anchor piece and a pressing piece, wherein the anchor piece is arranged in the puncture piece, the pressing piece and the puncture piece are both in preset shapes, and when the anchoring is performed, the anchor piece and the pressing piece recover to the preset shapes after the puncture piece penetrates into a target position firstly.

In one embodiment, an anchored region on the cardiac implant is also included.

In one embodiment, the piercing member includes a piercing rod, a piercing tip disposed at one end of the piercing rod.

In one embodiment, the anchor comprises a stopper and a needle set.

In one embodiment, the puncture outfit further comprises a pushing device, wherein the pressing piece is arranged on the puncture piece, when the puncture outfit is preassembled, the pressing piece is limited in the pushing device, the pushing device is operated to ensure that the puncture piece punctures the target position, the pressing piece restores to the preset shape and is abutted against or connected with the target position, and the needle pricking piece moves towards the direction of the distal end opening of the puncture piece and extends out of the puncture piece to gradually restore to the preset shape; the compression piece on the puncture piece ensures the fixed connection between the anchoring mechanism and the anchored area, the needle pricking piece ensures the fixed connection between the anchoring mechanism and the heart tissue, and the compression piece and the needle pricking piece are tightly matched, so that the needle pricking piece can be set to have larger curvature (to enhance anchoring force) and can penetrate into the heart tissue to be anchored, the fixed connection between the anchoring mechanism and the heart tissue is greatly stabilized, and the pulling-off between the anchoring mechanism and the heart tissue is avoided.

In a preferred embodiment, when the compressing element is connected with the anchoring element in a matching manner, the compressing element is limited in the puncturing element, the pushing device is operated to make the puncturing element penetrate into the anchored area, the limiting head is pushed to make the needle puncturing element move along the channel towards the direction of the distal port of the puncturing element and extend out of the channel to gradually restore to the preset shape, and meanwhile, the compressing element extends out of the mounting groove and restores to the preset shape until the limiting head abuts against the other end of the puncturing rod, so that anchoring is completed.

In one embodiment, a rounded corner is provided between the compression member and the piercing member; the design of fillet makes it has good fatigue resistance to compress tightly the piece, avoids taking place the rupture in the use.

In one embodiment, one end of the compression member is free, and when the push device is operated to restore the compression member to the preset configuration, the other end of the compression member abuts against/is connected with the anchored area.

In one embodiment, the compression member is arranged in a "triangular" or "conical" or "cone-like" configuration in the cross-sectional direction of the penetration rod, which is advantageous in that: when the pressing piece recovers to be in the preset shape, the free end of the pressing piece can be supported on the anchored area, and the fixed connection between the puncture piece and the anchored area is effectively stabilized.

In one embodiment, the pressure element is provided in a hollow-out manner or is formed by winding a thread.

In one embodiment, the pressing pieces are arranged in a sheet structure, and the number of the pressing pieces is two or more.

In one embodiment, the pressing part is hollow, so that the design has the advantages that: the pressing piece is prevented from being broken in the shaping process, and the yield can be effectively improved.

In another embodiment, the compression member may be a single filament winding.

In one embodiment, the puncturing piece is further provided with a self-adaptive bending structure; the puncture piece can ensure that the anchor reaches the inside of the heart tissue, the loading length of the anchoring mechanism is increased at the same time, and the self-adaptive bending structure on the puncture rod can enable the anchoring mechanism to conform to the bending degree of the pushing device during loading and conveying, so that the injury to blood vessels during loading and conveying is effectively avoided.

In one embodiment, one end portion of the compressing member is further provided with a plurality of rigid burrs, and when the compressing member returns to the preset shape, the rigid burrs are matched and fixed with the anchored area.

In one embodiment, the pushing device includes a delivery rail, a pushing assembly disposed within the delivery rail, the anchoring mechanism being disposed on a distal side of the pushing assembly.

In one embodiment, the pusher assembly comprises a lancet pusher tube having a distal end abutting the lancet for pushing the lancet, and an anchor pusher tube having a distal end abutting the anchor for pushing the anchor.

In one embodiment, the diameter of the stopper is greater than the diameter of the passageway; when the anchoring push tube pushes the limiting head to move towards the puncture tip of the puncture rod until the limiting head is pushed against the puncture rod, the anchoring mechanism completes anchoring.

In one embodiment, the anchored region is covered with a membrane; the membrane material comprises a metal material, polytetrafluoroethylene, polyethylene, polypropylene, terylene or animal-derived material.

Compared with the prior art, the application has the advantages that:

1. different from the difference problem of physiological anatomical structures of different patients in the prior art, the anchored area on the cardiac implant cannot be completely attached to cardiac tissue, and because the needle tip part of the anchoring needle can rapidly move towards the needle head direction in the process of restoring the preset shape, the anchoring needle cannot be ensured to be effectively inserted into the cardiac tissue when the anchoring needle is inserted, or the anchoring needle is inserted into the cardiac tissue with very limited depth, and the obtained anchoring force is very limited, aiming at the technical pain point, the puncture piece is firstly inserted into the cardiac tissue, when the puncture piece extends out of the channel of the puncture piece, the puncture piece can be contacted with the cardiac tissue for anchoring, and meanwhile, the early bending of the puncture piece is avoided, the depth of the puncture piece in the cardiac tissue can be ensured, so that the anchoring force is ensured, and the risk that the anchoring mechanism is pulled away from the cardiac tissue is avoided, meanwhile, the pressing piece on the puncture piece ensures that the anchoring mechanism is fixedly connected with the anchored area, and the anchoring mechanism is prevented from falling off from the anchored area;

2. when the structure of anchoring needle wants to obtain great anchoring force among the prior art, need satisfy two conditions: the length of the anchoring needle entering the heart tissue is long enough, the curvature of the front section of the anchoring needle is large enough, and when the curvature of the front section of the anchoring needle is large, the anchoring needle can rapidly move towards the direction of the needle head due to the self-bent shape in the process of recovering the preset shape, so that the length of the anchoring needle remaining in the heart tissue is very limited; the anchoring piece is hidden in the puncturing piece, and the anchoring piece is pushed out to be anchored with the heart tissue after the puncturing piece penetrates into the heart tissue to a certain depth, so that the anchoring piece can be ensured to be remained in the heart tissue for a length even if the curvature of the puncturing piece is large, and therefore, the anchoring mechanism is ensured to obtain enough anchoring force, and pain points existing in the prior art are ingeniously solved; 3. the anchoring needle is characterized in that the anchoring needle adopts a limiting head with a large diameter to limit the anchoring mechanism from falling off an anchored area, however, the large limiting head inevitably causes the diameter of the conveying device to be overlarge, the blood vessel is easy to be damaged when the minimally invasive surgery is accessed, and the pressing piece can be hidden in the mounting groove when in loading and conveying, so that the loading space of the anchoring mechanism in the pushing device can be effectively saved, and the loading and conveying are facilitated;

4. different prior art, the puncture piece of this application can ensure that anchor reachs the heart tissue inside, has also increased anchoring mechanism's loading length simultaneously, and the self-adaptation curved structure on the puncture pole can make anchoring mechanism conform to pusher's accent camber when loading and carrying to effectively avoid the damage to the blood vessel when loading and carrying.

Drawings

Fig. 1a and 1b show two embodiments of the prior art of the present invention.

Fig. 2a and 2b are schematic views showing the structural relationship between the cardiac implant and the anchoring mechanism of the present invention.

Fig. 3a and 3b are schematic structural views of the anchoring mechanism and the anchor according to the present invention.

Fig. 4a to 4d are schematic structural views of the puncturing member of the present invention.

Fig. 5 a-5 f are schematic views illustrating the process of the anchoring member passing through the piercing member of the present invention, wherein fig. 5f is another embodiment of the form of the piercing member.

Fig. 6a and 6b are schematic structural diagrams of the pushing device of the present invention.

Fig. 7a to 7g are schematic views illustrating the anchoring process of the anchoring mechanism of the present invention in the anchored region of the cardiac implant.

Fig. 8a to 8c show another embodiment of the present invention.

The names of the parts indicated by the numbers in the drawings are as follows: 1-cardiac implant, 11-anchored area, 2-pusher, 21-delivery track, 22-pusher assembly, 221-penetrator pusher tube, 222-anchor pusher tube, 3-anchoring mechanism, 31-penetrator, 311-puncture rod, 3111-channel, 3112-mounting slot, 3113-adaptive bend structure, 312-puncture tip, 32-anchor, 321-stopper, 322-needle punch, 33-impactor, 331-rigid burr, 332-fillet.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples.

The proximal end is the end close to the operator, and the distal end is the end far away from the operator.

The first embodiment is as follows:

as shown in fig. 1a and 1b, in the prior art, when the anchor needle is intended to obtain a large anchoring force, two conditions need to be satisfied: firstly, the length of the anchoring needle entering the heart tissue is long enough, secondly, the curvature of the front section of the anchoring needle is large enough, and when the curvature of the front section of the anchoring needle is large, the anchoring needle can rapidly move towards the direction of the needle head due to the self-bent shape in the process of recovering the preset shape, so that the length of the anchoring needle remaining in the heart tissue is very limited, as shown in fig. 1 a; when the curvature of the front segment of the anchoring needle is smaller, although the length requirement of the anchoring needle remaining in the heart tissue can be met, the smaller curvature of the front segment of the anchoring needle still causes the anchoring force to be insufficient, and the anchoring force is easy to pull away from the heart tissue, as shown in fig. 1 b; the present application proposes a new anchoring mechanism 3 applied to the cardiac implant 1 for the above-mentioned technical pain points, and ingeniously solves the pain points existing in the prior art.

As shown in fig. 2a and 2b, when the structure is used for tricuspid valve treatment, an anchoring mechanism 3 applied to a cardiac implant comprises a cardiac implant 1, an anchored area 11 arranged on the cardiac implant 1, a pushing device 2 and an anchoring mechanism 3 arranged in the pushing device 2, wherein the anchoring mechanism 3 comprises a puncturing element 31 and an anchoring element 32 (shown in fig. 3 a), the anchoring element 32 comprises a limiting head 321 and a needle puncturing element 322 (shown in fig. 3 b), the puncturing element 31 comprises a puncturing rod 311, a puncturing tip 312 arranged at one end of the puncturing rod 311, a pressing element 33 arranged on the puncturing rod 311 (shown in fig. 4 a), the pressing element 33 and the puncturing element 322 have preset configurations, a channel 3111 is arranged in the puncturing rod 311, and when the structure is preloaded, the pressing element 33 is limited in the pushing device 2 (shown in fig. 6 a), after the pushing device 2 is operated to make the puncturing element 31 puncture the anchored area 11 and the pressing element 33 restore to the preset shape, the limiting head 321 is pushed to make the needle puncturing element 322 move along the channel 3111 towards the puncturing tip 312 and extend out of the channel 3111 to gradually restore to the preset shape until the limiting head 321 abuts against the other end of the puncturing rod 311, thereby completing the anchoring (as shown in fig. 7a to 7 g); according to the heart tissue anchoring device, the puncture piece 31 is firstly punctured into the heart tissue, when the needle piece 322 extends out of the channel 3111 of the puncture piece 31, the needle piece can be contacted with the heart tissue for anchoring, the needle piece 322 is prevented from bending too early, the depth of the needle piece 322 in the heart tissue can be ensured, the anchoring force is ensured, the risk that the anchoring mechanism 3 is pulled off from the heart tissue is avoided, meanwhile, the pressing piece 33 on the puncture piece 31 ensures that the anchoring mechanism 3 is fixedly connected with the anchored area 11, and the anchoring mechanism 3 is prevented from falling off from the anchored area 11.

In this embodiment, the number of the needle-inserting members 322 may be one or more.

In this embodiment, the needle 322 may be made of a shape memory material, preferably a nickel titanium shape memory alloy.

In this embodiment, the needle-piercing member 322 is made of a plurality of nitinol wires.

In a preferred embodiment, the number of the needle-inserting pieces 322 is 4, and as shown in fig. 3b, the shape of the needle-inserting pieces 322 can be configured to be similar to a "boat anchor", which can increase the anchoring area and further effectively enhance the anchoring effect.

In a preferred embodiment, the form of the needle punch 322 may also be a spiral needle form, as shown in FIG. 5 f.

In this embodiment, a rounded corner 332 is provided between the compressing member 33 and the puncturing member 31, as shown in fig. 4 d.

In this embodiment, the pressing members 33 are symmetrically distributed on the puncture rod 311, as shown in fig. 4a, one end of the pressing member 33 is connected to the puncture rod 311, the other end of the pressing member 33 is free, and when the pushing device 2 is operated to restore the pressing member 33 to the preset configuration, the other end of the pressing member 33 abuts against/is connected to the anchored area 11.

In this embodiment, in the cross-sectional direction of the puncture rod 311, the pressing member 33 is disposed in a "triangle" or "cone-like" structure, which is advantageous in that: when the pressing piece 33 returns to the preset shape, the free end of the pressing piece 33 can be supported on the anchored area 11, so that the fixed connection between the puncture piece 31 and the anchored area 11 is effectively stabilized; at the same time, a "triangular" or "conical" or "cone-like" structure may effectively increase the contact connection between the anchoring mechanism 3 and the anchored region 11, making the fixed connection between the two more stable.

In this embodiment, the pressing members 33 are arranged in a sheet structure, and the number of the pressing members 33 is two or more.

In a preferred embodiment, the number of the pressing members 33 is four.

In this embodiment, the pressing member 33 and the puncture rod 311 are cut integrally, as shown in fig. 4 b.

In this embodiment, the pressing member 33 is hollow, as shown in fig. 4c, so that the design has the following advantages: the pressing piece 33 is prevented from being broken in the shaping process, and the yield can be effectively improved.

In this embodiment, the pressing member 33 may also be formed by winding a single wire.

In this embodiment, the puncture rod 311 is provided with an installation groove 3112, and when the puncture rod is preassembled, the pressing member 33 is limited in the installation groove 3112 by the pushing device 2; the purpose of this design is that, in the prior art, the anchoring needles all use the limiting heads 321 with large diameter to limit the anchoring mechanisms 3 from falling off the anchored region 11, however, the large limiting heads 321 inevitably result in too large diameter of the delivery device, which is likely to damage blood vessels during minimally invasive surgery approach, and the compressing member 33 can be "hidden" in the mounting groove 3112 during loading and delivery, which can effectively save the loading space of the anchoring mechanisms 3 in the pushing device 2, and facilitate loading and delivery, as shown in fig. 5 a.

In this embodiment, the puncture rod 311 is further provided with a self-adaptive bending structure 3113; while penetrating member 31 ensures that anchor 32 reaches the inside of the heart tissue, and increases the loading length of anchoring mechanism 3, adaptive curve structure 3113 on penetrating rod 311 allows anchoring mechanism 3 to conform to the curve of pushing device 2 during loading and delivery, thereby effectively avoiding damage to the blood vessel during loading and delivery.

In this embodiment, a plurality of rigid burrs 331 are further disposed on the other end portion of the pressing member 33, when the pressing member 33 is restored to the preset configuration, the rigid burrs 331 are fixed to the anchored area 11 in a matching manner, and the rigid burrs 331 can effectively enhance the fixed connection between the pressing member 33 and the anchored area 11.

In this embodiment, the pushing device 2 comprises a conveying guide rail 21 and a pushing assembly 22 arranged in the conveying guide rail 21, and the anchoring mechanism 3 is arranged at the distal end side of the pushing assembly 22, as shown in fig. 6 a.

In this embodiment, the pusher assembly 22 includes a piercing member pushing tube 221 and an anchor member pushing tube 222, the piercing member pushing tube 221 is engaged with the piercing member 31, and the anchor member pushing tube 222 is engaged with the anchor member 32, as shown in fig. 6 b.

In this embodiment, the diameter of the limiting head 321 is larger than the diameter of the channel 3111; when the anchoring member 32 pushes the tube 222 to push the stopper 321 to move toward the puncture tip 312 of the puncture rod 311 until the stopper 321 pushes against the puncture rod 311, the anchoring mechanism 3 completes anchoring, as shown in fig. 5a to 5 e.

In this embodiment, the anchored region 11 is covered with a film; the membrane material comprises a metal material, polytetrafluoroethylene, polyethylene, polypropylene, terylene or animal-derived material.

The working process of the application comprises the following steps:

1. operating the pushing device 2 to make the piercing member 31 pierce the anchored area 11, and the pressing member 33 gradually returns to the preset configuration, as shown in fig. 7a to 7 c;

2. pushing the stopper 321 causes the needle-piercing element 322 to move along the channel 3111 in the direction of the piercing tip 312, as shown in fig. 7 d;

3. continuing to push the limiting head 321 to gradually restore the needle puncturing piece 322 to a preset shape until the limiting head 321 abuts against the other end of the puncturing rod 311, and completing anchoring, as shown in fig. 7 e;

4. the pusher 2 is operated away from the heart tissue and the delivery system is moved away from the heart viscera, as shown in fig. 7f and 7 g.

The second embodiment is as follows:

as shown in the figure, when the structure is used for tricuspid valve treatment, an anchoring mechanism 3 applied to a cardiac implant comprises a cardiac implant 1, an anchored area 11 arranged on the cardiac implant 1, a pushing device 2 and an anchoring mechanism 3 arranged in the pushing device 2, wherein the anchoring mechanism 3 comprises a puncturing part 31 and an anchoring part 32 (shown in fig. 3 a), the pressing part 33 is connected with the anchoring part 32 in a matching way, as shown in fig. 8c, a mounting groove 3112 is arranged on the puncturing part 31, the pressing part 33 and the needle pricking part 322 are both in preset shapes, a channel 3111 is arranged in the puncturing part 31, when the pressing part 33 is limited in the puncturing part 31, the pushing device 2 is enabled to puncture the puncturing rod 311 into the anchored area 3, and the limiting head 321 is pushed, so that the needle pricking part 322 moves along the channel 3111 towards the puncturing tip 312 of the puncturing part 31 and gradually restores to the preset shape after extending out of the channel 3111 And in the shape, the pressing piece 33 extends out of the mounting groove 3112 and restores to the preset shape until the limiting head 321 abuts against the other end of the puncture rod 311, so that the anchoring is completed.

In a preferred embodiment, the number of the needle-inserting pieces 322 is 4, and as shown in fig. 8a, the shape of the needle-inserting pieces 322 can be configured to be similar to a "boat anchor", which can increase the anchoring area and further effectively enhance the anchoring effect.

In this embodiment, the compressing members 33 are symmetrically distributed on the anchoring member 32, as shown in fig. 4a, one end of the compressing member 33 is connected to the anchoring member 32, the other end of the compressing member 33 is free, and when the pushing device 2 is operated to restore the compressing member 33 to the preset configuration, the other end of the compressing member 33 abuts against/is connected to the anchored area 11.

In a preferred embodiment, the number of the pressing members 33 is four.

In this embodiment, the compressing member 33 and the anchoring member 32 are integrally cut, as shown in fig. 8 a.

In this embodiment, the piece 33 fretwork that compresses tightly sets up, and the benefit of design like this lies in: the pressing piece 33 is prevented from being broken in the shaping process, and the yield can be effectively improved.

In this embodiment, the puncture rod 311 is further provided with a self-adaptive bending structure 3113, as shown in fig. 8 b; while penetrating member 31 ensures that anchor 32 reaches the inside of the heart tissue, and increases the loading length of anchoring mechanism 3, adaptive curve structure 3113 on penetrating rod 311 allows anchoring mechanism 3 to conform to the curve of pushing device 2 during loading and delivery, thereby effectively avoiding damage to the blood vessel during loading and delivery.

In this embodiment, the diameter of the limiting head 321 is larger than the diameter of the channel 3111; when the anchor 32 pushes the tube 222 to push the stopper 321 toward the puncture tip 312 of the puncture rod 311 until the stopper 321 pushes against the puncture rod 311, the anchoring mechanism 3 completes anchoring, as shown in FIG. 8 c.

The foregoing is only a preferred embodiment of the present application, and those skilled in the art will appreciate that the present disclosure is not limited thereto.

Claims

1. An anchoring mechanism for application to a cardiac implant, comprising: the anchoring mechanism comprises a puncture piece, an anchoring piece and a pressing piece, the anchoring piece is arranged in the puncture piece, the pressing piece and the puncture piece are both in preset shapes, and when anchoring is performed, after the puncture piece penetrates into a target position firstly, the anchoring piece and the pressing piece are restored to the preset shapes.

2. An anchoring mechanism for use with a cardiac implant as defined in claim 1, wherein: the puncture outfit comprises a puncture piece and is characterized by further comprising a pushing device, wherein the compressing piece is arranged on the puncture piece, when the puncture outfit is preassembled, the compressing piece is limited in the pushing device, the pushing device is operated to enable the puncture piece to puncture a target position, the compressing piece is restored to a preset shape and is abutted against or connected with the target position, and the puncture piece moves towards the direction of a far end opening of the puncture piece and extends out of the puncture piece to be gradually restored to the preset shape.

3. An anchoring mechanism for use with a cardiac implant as defined in claim 1, wherein: the puncture outfit comprises an anchoring piece and a pressing piece, and is characterized by further comprising a pushing device, wherein the pressing piece is arranged on the anchoring piece, a mounting groove is formed in the puncture piece, when the puncture outfit is preassembled, the pressing piece and the anchoring piece are limited in the puncture piece, the pushing device is operated to enable the puncture piece to puncture a target position, the needle pricking piece moves towards the direction of a distal end opening of the puncture piece and extends out of the puncture piece to gradually restore to a preset shape, and meanwhile, the pressing piece extends out of the mounting groove to restore to the preset shape and abuts against or is connected with the target position.

4. An anchoring mechanism for use on a cardiac implant according to claim 1 or 2, wherein: and a round angle is arranged between the pressing piece and the puncturing piece.

5. An anchoring mechanism for use with a cardiac implant as defined in claim 2, wherein: the pushing device is operated to enable the pressing piece to restore to the preset shape, and the other end of the pressing piece is abutted/connected with the anchored area.

6. An anchoring mechanism for use with a cardiac implant as defined in claim 1, wherein: the pressing piece is arranged in a hollow mode or is formed by winding a wire.

7. An anchoring mechanism for use with a cardiac implant as defined in claim 1, wherein: and the puncture piece is also provided with a self-adaptive bending structure.

8. An anchoring mechanism for use with a cardiac implant as defined in claim 5, wherein: and a plurality of rigid burrs are further arranged on one end part of the pressing piece, and when the pressing piece is restored to a preset shape, the rigid burrs are matched and fixed with the anchored area.

9. An anchoring mechanism for use on a cardiac implant according to claim 2 or 3, wherein: the pushing device comprises a conveying guide rail and a pushing assembly arranged in the conveying guide rail, and the anchoring mechanism is arranged on the far end side of the pushing assembly.

10. An anchoring mechanism for use with a cardiac implant as defined in claim 9, wherein: the propelling movement subassembly includes a puncture piece propelling movement pipe and an anchor piece propelling movement pipe, the distal end of puncture piece propelling movement pipe with the puncture piece offsets in order to promote the puncture piece, the distal end of anchor piece propelling movement pipe with the anchor piece offsets in order to promote the anchor piece.