CN113384382A

CN113384382A - Artificial mitral valve annuloplasty ring implanting device

Info

Publication number: CN113384382A
Application number: CN202110823252.4A
Authority: CN
Inventors: 夏家红; 周诚
Original assignee: Aolvxin Wuhan Technology Co ltd; Tongji Medical College of Huazhong University of Science and Technology
Current assignee: Aolvxin Wuhan Technology Co ltd; Tongji Medical College of Huazhong University of Science and Technology; Union Hospital Tongji Medical College Huazhong University of Science and Technology
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-09-14

Abstract

The invention relates to an artificial mitral valve annuloplasty ring implanting device, which comprises an annuloplasty ring used for being jointed with heart tissue, an adjusting piece used for adjusting the curvature of the annuloplasty ring, and a plurality of riveting pieces used for anchoring the annuloplasty ring and the heart tissue, wherein developing materials are attached to the annuloplasty ring, each riveting piece comprises a cylindrical hollow shell, a conical sliding block is arranged in each shell, a nail rod is arranged at the top end of each sliding block, a pre-bending puncture needle made of memory alloy materials is arranged on each nail rod, a penetrating groove used for accommodating the pre-bending puncture needle is arranged on each shell, a compression spring is arranged between the bottom of each sliding block and the inner wall of each shell, and a pressing rod penetrating into each shell is arranged on the side surface of each shell. The invention can conveniently control the puncture direction of the tissue fixing rivet in the forming ring, has high operation efficiency and small wound, and effectively improves the success rate of the intervention implantation operation of the heart mitral valve forming ring.

Description

Artificial mitral valve annuloplasty ring implanting device

The technical field is as follows:

the invention relates to the technical field of cardiac surgery surgical instruments, in particular to an artificial mitral valve annuloplasty ring implanting device.

Background art:

the mitral valve is a bivalve (two leaflets) type valve that is located between the left atrium and the left ventricle. At diastole, the left atrial pressure increases due to blood filling and the normally functioning mitral valve now opens. As the atrial pressure increases and exceeds the left ventricular pressure, the mitral valve opens, helping passive blood flow into the left ventricle. As atrial contraction and relaxation ends, residual blood is allowed to flow from the left atrium into the left ventricle. The mitral valve closes after the atrial contraction is over to prevent backflow of blood flow from the left ventricle back to the left atrium. The opening of the mitral valve is surrounded by an annulus of fibers, referred to as the mitral annulus. The two leaflets attach circumferentially to the mitral annulus and open and close like annular hinges during the cardiac cycle. In a properly functioning mitral valve, the leaflets are connected by chordae tendinae to the papillary muscles of the left ventricle. When the left ventricle contracts, the pressure in the ventricle forces the mitral valve to close, and the chordae tendineae ensure the two leaflets to coapt, preventing them from prolapsing into the left atrium, causing mitral insufficiency, and preventing the valves from misorienting, thus preventing blood from flowing back into the left atrium.

Mitral valvuloplasty is the main means for treating mitral insufficiency, reserves mitral valve leaflet and subvalvular structure, reserves the connection of chordae tendineae papillary muscle and left ventricle, is favorable for diastole ventricular molding, thereby protecting the contraction function of the left ventricle, and having low operative mortality and good long-term effect. At present, the domestic treatment methods of mitral insufficiency mainly comprise surgical repair and endovascular clamping operation. Standard surgical repair or replacement procedures require open chest surgery and require extracorporeal circulation and cardiac arrest. The method has the advantages that the composite forming technology can be adopted, meanwhile, the pathological changes of the valve ring, the valve leaflet and the chordae tendineae are treated, the recurrence rate is reduced, and a better long-term effect is achieved. However, surgery is invasive and the risk of death, stroke, major bleeding, dyspnea, kidneys and other complications is high, making many patients unacceptable for such surgical treatment. The implementation of mitral valvuloplasty by minimally invasive intervention is the current focus of research.

In recent years, some of the instrumental manufacturers have developed leaflet clipping techniques via the vascular route. In this method, a clip made of biocompatible material is inserted into the heart valve between two leaflets using minimally invasive interventional techniques, by clipping the middle portions of the two leaflets to prevent prolapse of the leaflets. However, the disadvantages of this technique are also evident, such as the difficulty of positioning during the operation, the difficulty of removal when the implantation is not proper, the recurrence of the regurgitation of the heart valve, the inability to treat the annulus lesion, the need to implant multiple clips in a single operation, and the strict choice of case.

From abundant surgical experience and theory accumulated in recent years at home and abroad, the mitral valvuloplasty technology relates to valves, valve rings and subvalvular devices, and is often completed by a composite technology. Wherein, the implantation of the mitral valve ring is an inevitable step for ensuring the long-term effect. In addition to the fact that I-type mitral regurgitation can be repaired by simply implanting the mitral annulus, other types of mitral regurgitation-forming surgical procedures also require implanting the mitral annulus to promote leaflet coaptation and stabilize the shape and size of the annulus to achieve better long-term effects. The mitral valve shaping technique without mitral valve annulus implantation is incomplete, and the intervention of the mitral valve shaping technique and the intervention of mitral valve annulus implantation are inevitable problems.

Patent No. ZL201710211729.7 provides a transcatheter prosthetic mitral valve annuloplasty ring device comprising a shaping ribbon for engaging cardiac tissue, an adjustable member for adjusting the length of the shaping ribbon, and a plurality of tissue fixation rivets for anchoring the shaping ribbon to the cardiac tissue. Under the axial pushing force of the external conveyor, the gasket of the adjustable piece is elastically compressed to release the locking of the reel; the reel is driven to rotate under the rotating action of the external conveyor, the length of the conducting wire is adjusted to enable the size of the forming belt to shrink or expand so as to adjust the shape of the artificial mitral valve forming ring to be matched with the mitral valve annulus of the heart, the problem of mitral valve insufficiency is solved effectively, and finally, the axial pushing force disappears along with the taking out of the external conveyor, the gasket is restored to the original state, and the reel is upwards abutted to the housing to be locked. The transcatheter artificial mitral annuloplasty ring device can effectively reduce the operation difficulty and risk of the current mitral annuloplasty. However, the implantation position of the device is positioned on the mitral valve annulus on the left atrial side, because the wall of the left atrial myocardium is thin, serious complications are caused when the device is used for interventional valve annulus fixation, such as inaccurate positioning and easy damage to the coronary artery on the outer surface of the heart and atrial rupture.

The invention content is as follows:

technical problem to be solved

The invention aims to provide an artificial mitral valve annuloplasty ring implanting device, which solves the problems that in the prior art, tissue fixing rivets need to be pushed out of a forming ring, the operation steps are complicated, the rivet piercing direction is not easy to control, and the operation efficiency is seriously influenced.

(II) technical scheme

In order to solve the technical problems, the invention adopts the following technical scheme: the artificial mitral valve annuloplasty ring implanting device comprises a annuloplasty ring engaged with cardiac tissue, an adjusting piece used for adjusting the curvature of the annuloplasty ring, and a plurality of riveting pieces used for anchoring the annuloplasty ring and the cardiac tissue, wherein a developing material is attached to the annuloplasty ring, each riveting piece comprises a cylindrical hollow shell, a conical sliding block is arranged in each shell, a nail rod is arranged at the top end of each sliding block, a pre-bending puncture needle made of a memory alloy material is arranged on each nail rod, a penetrating groove used for accommodating the pre-bending puncture needle is formed in each shell, a compression spring is arranged between the bottom of each sliding block and the inner wall of each shell, a pressing rod penetrating into each shell is arranged on the side surface of each shell, and the top end of each pressing rod is attached to the conical surface of each sliding block.

When the annuloplasty ring is inserted into a mitral valve in a heart through a sheath tube for implantation, the riveting piece is used for penetrating through the annuloplasty ring to be connected and fixed with heart tissue, the pressing rod is used for being clamped by a clamp holder, the slide block is pushed by the top end of the pressing rod to move due to the fact that the joint of the slide block and the top end of the pressing rod is conical, the pre-bending puncture needle on the nail rod is tightened in the through groove, the clamp holder pushes the riveting piece to move in the annuloplasty ring, after the riveting position and the riveting direction are determined, the clamp holder releases the pressing rod, the slide block moves under the elastic force of the compression spring, the pre-bending puncture needle extends out of the through groove, the annuloplasty ring and the mitral valve tissue of the heart are anchored after penetrating through the annuloplasty ring and the mitral valve tissue of the heart, fixation is completed quickly, and the size of the annuloplasty ring can be adjusted through the adjusting piece, thereby controlling the size of the mitral valve annulus and completing the implantation procedure.

Further, the adjusting piece comprises a guide wire and a tightener, the guide wire is pre-arranged on the forming ring in a penetrating mode, one end of the guide wire is fixedly connected with one end of the forming ring, and the other end of the guide wire movably penetrates to the other end of the forming ring along the forming ring to extend out and is connected with the tightener. The tightener is used for drawing the guide wire to control the size of the forming ring.

Furthermore, the tightener comprises a base and a control rod, the control rod is inserted into the base, a containing cavity is arranged in the base, a ratchet wheel and a take-up pulley which are coaxial are rotatably arranged in the containing cavity, a spring is arranged between the bottom of the control rod and the base, a plurality of arc-shaped elastic metal sheets used for controlling the ratchet wheel to rotate in a single direction are arranged on the side surface of the control rod, and one end of the guide wire penetrates through a through hole formed in the outer wall of the base, enters the containing cavity and is wound on the take-up pulley. The control rod can drive the ratchet wheel to rotate in a pressing mode, the spring is used for providing restoring force for the return of the control rod, the arc-shaped elastic metal sheet is used for being matched with the ratchet wheel to drive the ratchet wheel to rotate in a single direction, when the control rod is pressed down, the arc-shaped elastic metal sheet is matched with the ratchet teeth of the ratchet wheel to push the ratchet wheel to drive the take-up wheel to rotate and pull the guide wire to tighten, when the control rod is loosened, the control rod returns, the arc-shaped elastic metal sheet is separated from being matched with the ratchet wheel, the ratchet wheel and the take-up wheel do not rotate, and therefore the size of the forming ring can be adjusted through the guide wire by repeatedly pressing the control rod.

Furthermore, the tightener comprises a shell and a rotating block which is rotatably arranged in the shell, a push rod and a push rod spring are arranged in the rotating block, an elastic pin shaft which penetrates through the shell, the rotating block and the top end of the push rod is arranged in the shell, a plurality of pin shaft holes for the elastic pin shaft to penetrate through are formed in the shell, a wire winding groove is formed in the periphery of the rotating block, a wire guide hole for the guide wire to penetrate through is formed in the shell, and a control hole is formed in the top of the rotating block. When the guide wire is not required to be pulled to control the size of the forming ring, the elastic pin shaft penetrates through the shell, the rotating block and the push rod, the rotating block is locked and cannot rotate in the shell, when the guide wire is required to be pulled to adjust the size of the forming ring, the push rod is pressed down, the middle section of the elastic pin shaft is compressed, two ends of the elastic pin shaft exit the pin shaft hole, the locking function of the elastic pin shaft is cancelled, the rotating block can be rotated through the control hole to tighten the guide wire in the wire collecting groove, after the push rod is loosened, the push rod spring and the elastic pin shaft return, and the rotating block is locked again.

Furthermore, the border of slider is equipped with the screens piece, be equipped with the confession on the inner wall of casing the spout that the screens piece removed, be equipped with in the spout with screens piece complex draw-in groove. The clamping block is used for locking the position of the sliding block by being matched with the clamping groove when the pre-bending puncture needle penetrates out of the through groove to anchor the forming ring and the heart tissue, so that the sliding block is prevented from moving in the shell after long-term use to influence the stability of the forming ring.

Furthermore, a return spring is arranged between the pressing rod and the outer wall of the shell, so that the pressing rod is convenient to control.

Furthermore, one end, attached to the sliding block, of the pressing rod is an inclined plane matched with the taper of the sliding block, so that the sliding block can move by controlling the pressing rod.

Furthermore, the roller is arranged at one end, attached to the sliding block, of the pressing rod, so that clamping stagnation of the pressing rod and the sliding block is avoided under the action of pressure, and control accuracy is guaranteed.

Furthermore, the forming ring is made of polyester fiber fabric, has enough biological tissue affinity and flexibility, and is convenient to fit with the shape of the heart mitral valve.

(III) advantageous effects

Compared with the prior art, the invention has the following beneficial effects: through setting up the forming ring, regulating part and riveting piece, the riveting piece includes columniform hollow shell, set up conical slider in the casing, the top of slider sets up the nail pole, set up the pre-bending pjncture needle of making by memory alloy material on the nail pole, set up the poling groove that is used for holding the pre-bending pjncture needle on the casing, set up compression spring between the bottom of slider and the shells inner wall, the side of casing sets up the press lever that the control slider removed, can implant the operation in-process at the forming ring, conveniently stretch into the riveting piece and carry out the forming ring and be connected fixedly with heart mitral valve tissue with the quick release pre-bending pjncture needle behind forming ring internal regulation position and the direction, and is easy to operate, effectively improve operation efficiency.

Description of the drawings:

in order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below.

FIG. 1 is a schematic structural view of a prosthetic mitral annuloplasty ring implant device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a prosthetic mitral annuloplasty ring implant device according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the rivet in an unfulfilled state of the prosthetic mitral annuloplasty ring implant device in accordance with an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the rivet in a riveted condition of the prosthetic mitral annuloplasty ring implant device in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the adjustment member of the prosthetic mitral annuloplasty ring implant device in accordance with an embodiment of the present invention;

FIG. 6 is a schematic view of another configuration of the adjustment member of the prosthetic mitral annuloplasty ring implant device in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view of another configuration of an adjustment member of the prosthetic mitral annuloplasty ring implant device in accordance with an embodiment of the present invention in an adjusted position;

FIG. 8 is a cross-sectional view of another configuration of the adjustment member of the prosthetic mitral annuloplasty ring implant device in accordance with an embodiment of the present invention in a locked position;

FIG. 9 is a schematic view of a prosthetic mitral annuloplasty ring implant device according to an embodiment of the present invention shown in use, but not fully released;

FIG. 10 is a schematic view of a prosthetic mitral annuloplasty ring implant device according to an embodiment of the present invention shown after full release in use;

FIG. 11 is a schematic view of a heart site with a prosthetic mitral annuloplasty ring implant device in use, according to an embodiment of the present invention;

in the figure: 1. a forming ring; 2. an adjustment member; 21. a guide wire; 22. a tightener; 2201. a base; 2202. a control lever; 2203. an accommodating chamber; 2204. a ratchet wheel; 2205. a take-up pulley; 2206. a spring; 2207. an arc-shaped elastic metal sheet; 2208. perforating; 2209. a housing; 2210. rotating the block; 2211. a push rod; 2212. a push rod spring; 2213. an elastic pin shaft; 2214. a pin shaft hole; 2215. a wire collecting groove; 2216. a wire guide hole; 2217. a control hole; 3. riveting a connecting piece; 31. a housing; 32. a slider; 33. a nail rod; 34. pre-bending the puncture needle; 35. penetrating a groove; 36. a compression spring; 37. a pressing lever; 4. a bit block; 5. a chute; 6. a card slot; 7. a return spring; 8. a roller; 9. a sheath tube; 10. the mitral annulus; 11. the left atrium; 12. the right atrium; 13. a left ventricle; 14. a right ventricle; 15. a chordae tendineae; 16. apical approach

The specific implementation mode is as follows:

the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1, 2, 3 and 4, the artificial mitral annuloplasty ring implanting device comprises an annuloplasty ring 1 for engaging with cardiac tissue, an adjusting member 2 for adjusting the curvature of the annuloplasty ring 1, and a plurality of rivets 3 for anchoring the annuloplasty ring 1 with the cardiac tissue, wherein a developing material is attached to the annuloplasty ring 1, the rivets 3 comprise a cylindrical hollow housing 31, a conical slider 32 is disposed in the housing 31, a nail rod 33 is disposed at the top end of the slider 32, a pre-curved puncture needle 34 made of a memory alloy material is disposed on the nail rod 33, a through slot 35 for accommodating the pre-curved puncture needle 34 is disposed on the housing 31, a compression spring 36 is disposed between the bottom of the slider 32 and the inner wall of the housing 31, a pressing rod 37 penetrating into the housing 31 is disposed on the side surface of the housing 31, and the top end of the pressing rod 37 is attached to the conical surface of the slider 32.

Preferably, the adjusting member 2 comprises a guide wire 21 and a tightener 22, which are pre-threaded on the annuloplasty ring 1, one end of the guide wire 21 is fixedly connected with one end of the annuloplasty ring 1, and the other end of the guide wire 21 is movably threaded on the annuloplasty ring 1 to extend out of the other end of the annuloplasty ring 1 and is connected with the tightener 22. The tightener 22 is used to pull the guide wire 21 to control the size of the annular ring 1.

As shown in fig. 5, the tightener 22 is preferably of a construction as follows: the tightener 22 comprises a base 2201 and a control rod 2202, the control rod 2202 is inserted into the base 2201, an accommodating cavity 2203 is arranged in the base 2201, a ratchet 2204 and a wire take-up wheel 2205 which are coaxial are rotatably arranged in the accommodating cavity 2203, a spring 2206 is arranged between the bottom of the control rod 2202 and the base 2201, a plurality of arc-shaped elastic metal sheets 2207 used for controlling the ratchet 2204 to rotate in a single direction are arranged on the side surface of the control rod 2202, and one end of a guide wire 21 penetrates through a through hole 2208 arranged on the outer wall of the base 2201, enters the accommodating cavity 2203 and is wound on the wire take-up wheel 2205. The control rod 2202 can drive the ratchet 2204 to rotate in a pressing mode, the spring 2206 is used for providing restoring force for the return of the control rod 2202, the arc-shaped elastic metal sheet 2207 is used for being matched with the ratchet 2204 to drive the ratchet 2204 to rotate in a single direction, when the control rod 2202 is pressed down, the arc-shaped elastic metal sheet 2207 is matched with the ratchet of the ratchet 2204 to push the ratchet 2204 to drive the take-up wheel 2205 to rotate, the guide wire 21 is pulled to tighten, when the control rod 2202 is loosened, the control rod 2202 returns, the arc-shaped elastic metal sheet 2207 is separated from being matched with the ratchet 2204, the ratchet 2204 and the take-up wheel 2205 do not rotate, and therefore the size of the forming ring 1 can be adjusted through the guide wire 21 by.

As shown in fig. 6, 7 and 8, another configuration of the tightener 22 is preferably as follows: the tightener 22 comprises a housing 2209 and a rotating block 2210 rotatably arranged in the housing 2209, wherein a push rod 2211 and a push rod spring 2212 are arranged in the rotating block 2210, an elastic pin 2213 penetrating through the housing 2209, the rotating block 2210 and the top end of the push rod 2211 is arranged in the housing 2209, a plurality of pin holes 2214 for the elastic pin 2213 to penetrate through are arranged on the housing 2209, a wire receiving groove 2215 is arranged on the periphery of the rotating block 2210, a wire guiding hole 2216 for the guide wire 21 to penetrate through is arranged on the housing 2209, and a control hole 2217 is arranged at the top of the rotating block 2210. When the guide wire 21 is not required to be pulled to control the size of the forming ring 1, the elastic pin 2213 penetrates through the shell 2209, the rotating block 2210 and the push rod 2211, the rotating block 2210 is locked and cannot rotate in the shell 2209, when the guide wire 21 is required to be pulled to adjust the size of the forming ring 1, the push rod 2211 is pressed, the middle section of the elastic pin 2213 is compressed, two ends of the elastic pin 2213 are withdrawn from the pin hole 2214, the locking function of the elastic pin 2213 is cancelled, the rotating block 2210 can be rotated through the control hole 2217 to tighten the guide wire 21 in the wire take-up groove 2215, after the push rod 2211 is released, the push rod spring 2212 and the elastic pin 2213 return, and the rotating block 2210 is locked again.

Preferably, the edge of the sliding block 32 is provided with a clamping block 4, the inner wall of the housing 31 is provided with a sliding groove 5 for the clamping block 4 to move, and the sliding groove 5 is internally provided with a clamping groove 6 matched with the clamping block 4. The clamping block 4 is used for locking the position of the slide block 32 by matching with the clamping groove 6 when the pre-bending puncture needle 34 penetrates out of the penetrating groove 35 to anchor the forming ring 1 and the heart tissue, so that the slide block 32 is prevented from moving in the shell 31 after long-term use to influence the stability of the forming ring 1.

Preferably, a return spring 7 is provided between the pressing lever 37 and the outer wall of the housing 31 to facilitate control of the pressing lever 37.

Preferably, the end of the pressing rod 37, which is attached to the slider 32, is an inclined surface matching the taper of the slider 32, so that the slider 32 can be moved by controlling the pressing rod 37.

Preferably, the roller 8 is arranged at the end, attached to the sliding block 32, of the pressing rod 37, so that clamping stagnation generated under the action of pressure at the attaching position of the pressing rod 37 and the sliding block 32 is avoided, and the control accuracy is ensured.

Preferably, the annuloplasty ring 1 is made of polyester fiber fabric, and has sufficient affinity and flexibility for biological tissues, so as to be conveniently fitted to the mitral valve of the heart.

As shown in fig. 9, 10 and 11, a method for using a prosthetic mitral annuloplasty ring implant device according to the present invention is as follows:

the method comprises the steps of carrying out minimally invasive cardiac apex making on an apical part of a patient, enabling a sheath tube 9 to pass through the apical approach 16, enabling the sheath tube 9 to extend into a left ventricle 13 in a mode of avoiding tendon cables 15, then pushing a forming ring 1 to a mitral valve ring 10 below a valve membrane through the sheath tube 9, slowly releasing the forming ring 1 along the mitral valve ring 10, clamping a riveting piece 3 through a clamping device, enabling the forming ring 1 to extend into the mitral valve ring 10 through the forming ring 1, releasing a riveting piece 3 from the ventricle facing to an atrial surface, anchoring the forming ring 1 and the mitral valve ring 10 after a pre-bending puncture needle 34 on the riveting piece 3 penetrates through tissues of the forming ring 1 and the mitral valve ring 10, sequentially releasing a plurality of riveting pieces 3, and rapidly achieving fixation, wherein the forming ring 1 surrounds front and back papillary muscles and the tendon cables 15. The annuloplasty ring 1 is a straight tube braided structure, is initially in a straight tube state, is positioned in the sheath tube 9, is released during the operation, and is input into the riveting piece 3 through the gripper to fix the mitral valve annulus 10, so that the valve annulus is changed into a ring shape from the straight tube shape through the action of the riveting pieces 3. The size of the mitral valve ring 10 is evaluated by ultrasonic, after the annuloplasty ring 1 is fixed on the mitral valve ring 10, the mitral valve ring 10 is adjusted by controlling the tightening of the guide wire 21 by the adjusting part 22, and the interventional mitral valve shaping is completed.

The operation of implanting the forming ring through the apex of the heart, the riveting piece 3 has less damage to the heart and is safer; furthermore, the present invention may be used in conventional procedures for implanting a annuloplasty ring through the left atrium, in addition to transapical implantation.

In conclusion, the artificial mitral valve annuloplasty ring implanting device provided by the invention solves the problems that in the prior art, the tissue fixing rivet needs to be pushed out of the annuloplasty ring, the operation steps are complicated, the rivet piercing direction is not easy to control, and the operation efficiency is seriously affected.

The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.

Claims

1. A prosthetic mitral annuloplasty ring implant device comprising an annuloplasty ring for engaging cardiac tissue, an adjustment member for adjusting the curvature of the annuloplasty ring, and a plurality of rivets for anchoring the annuloplasty ring to the cardiac tissue, the annuloplasty ring having a visualization material attached thereto, characterized in that: the riveting piece comprises a cylindrical hollow shell, a conical sliding block is arranged in the shell, a nail rod is arranged at the top end of the sliding block, a pre-bending puncture needle made of a memory alloy material is arranged on the nail rod, a penetrating groove used for accommodating the pre-bending puncture needle is formed in the shell, a compression spring is arranged between the bottom of the sliding block and the inner wall of the shell, a pressing rod penetrating into the shell is arranged on the side face of the shell, and the top end of the pressing rod is attached to the conical surface of the sliding block.

2. The prosthetic mitral annuloplasty ring implant device of claim 1, wherein: the adjusting piece comprises a guide wire and a tightener, the guide wire is pre-arranged on the forming ring in a penetrating mode, one end of the guide wire is fixedly connected with one end of the forming ring, and the other end of the guide wire movably penetrates to the other end of the forming ring along the forming ring to extend out and is connected with the tightener.

3. The prosthetic mitral annuloplasty ring implant device of claim 2, wherein: the tightener comprises a base and a control rod, the control rod is inserted into the base, a containing cavity is arranged in the base, a ratchet wheel and a take-up pulley which are coaxial are rotatably arranged in the containing cavity, a spring is arranged between the bottom of the control rod and the base, a plurality of arc-shaped elastic metal sheets used for controlling the ratchet wheel to rotate in a single direction are arranged on the side face of the control rod, and one end of a guide wire penetrates through a through hole formed in the outer wall of the base, enters the containing cavity and is wound on the take-up pulley.

4. The prosthetic mitral annuloplasty ring implant device of claim 2, wherein: the tightener comprises a shell and a rotating block which is rotatably arranged in the shell, a push rod and a push rod spring are arranged in the rotating block, the shell is internally provided with a plurality of pin shaft holes for the elastic pin shafts to pass through, the thread take-up groove is arranged on the periphery of the rotating block, a thread guide hole for the thread guide to pass through is arranged on the shell, and a control hole is arranged at the top of the rotating block.

5. The prosthetic mitral annuloplasty ring implant device of claim 1, wherein: the edge of slider is equipped with the screens piece, be equipped with the confession on the inner wall of casing the spout that the screens piece removed, be equipped with in the spout with screens piece complex draw-in groove.

6. The prosthetic mitral annuloplasty ring implant device of claim 1, wherein: and a return spring is arranged between the pressing rod and the outer wall of the shell.

7. The prosthetic mitral annuloplasty ring implant device of claim 1, wherein: one end of the pressing rod, which is attached to the sliding block, is an inclined plane matched with the taper of the sliding block.

8. The prosthetic mitral annuloplasty ring implant device of claim 1, wherein: and a roller is arranged at one end of the pressing rod, which is attached to the sliding block.

9. The prosthetic mitral annuloplasty ring implant device of claim 1, wherein: the forming ring is made of polyester fiber fabric.