CN212281775U - Mitral valve annular device that contracts - Google Patents
Mitral valve annular device that contracts Download PDFInfo
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- CN212281775U CN212281775U CN202021189129.9U CN202021189129U CN212281775U CN 212281775 U CN212281775 U CN 212281775U CN 202021189129 U CN202021189129 U CN 202021189129U CN 212281775 U CN212281775 U CN 212281775U
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Abstract
The utility model relates to the technical field of medical instruments, in particular to a mitral valve ring-shrinking device, which comprises a tightening device, a tightening line, a slender body and an anchoring piece; two ends of the elongated body are respectively provided with an anchoring hole and a tightening hole, the anchoring hole is connected with an anchoring piece, and the tightening hole is connected with a tightening wire; the tightening device comprises a protective sleeve, a ratchet knob and a wire bunching barrel, the ratchet knob is fixedly connected with the wire bunching barrel, and the protective sleeve is sleeved outside the wire bunching barrel; the ratchet knob is provided with a rotating shaft penetrating through the inside of the wire bundling cylinder, threading holes are formed in the periphery of the rotating shaft, the inside of the rotating shaft is hollowed out from the threading holes and penetrates to the bottom of the ratchet knob, and wire bundling holes corresponding to the threading holes of the rotating shaft are formed in the periphery of the wire bundling cylinder; the tightening line sequentially penetrates through the protective sleeve, the line bunching hole and the threading hole to the outside of the bottom of the ratchet knob; the tip of tightening line has anti-disengaging structure, the bottom of protective sheath has the spacing arch of annular.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a mitral valve ring contracts device.
Background
The mitral valve of the human heart has a very different structure from valves in other hearts, and includes an annulus of annular structure formed by a pair of leaflets, chordae tendineae, papillary muscles, and the like. The leaflets extend downward from the annulus into the left ventricle and are connected to the papillary muscles by chordae tendinae. The leaflet structure has an anterior leaflet and a posterior leaflet, and the side of the leaflet structure with the valve annulus is called the posterior leaflet. The normal valve anterior leaflet acts as a one-way valve with the posterior leaflet so that blood can only flow from the left atrium to the left ventricle. The left atrium receives oxygenated blood in the pulmonary veins, and when the left atrium contracts and the left ventricle expands, the oxygenated blood collected in the left atrium flows into the left ventricle, and when the left atrium relaxes and the left ventricular muscle contracts, the pressure rise in the left ventricle forces the two leaflets together, so that the closed one-way mitral valve blood cannot flow back into the left atrium but is expelled from the left ventricle through the aortic valve. To prevent the two leaflets from prolapsing under pressure and folding back towards the left atrium through the mitral annulus, the chordae tendineae secure the leaflets to the papillary muscles.
Valvular heart disease is a common heart disease, and with the development of economic society and the aging population, the incidence of mitral insufficiency (MR) is in a state of rising significantly. In normal conditions, the anterior and posterior mitral valve leaflets have large coaptation areas, and the anterior valve has great potential compensation capacity. If the annulus dilates, the coaptation area between the two leaflets will decrease; when the annulus is extremely dilated, the two leaflets fail to coapt completely, and a void is formed between the leaflets, which can generate MR.
In addition, the muscles at the junction of the left atrium and the left ventricle support the posterior leaflet of the mitral valve. The endocardium on the surface of the posterior valve of the mitral valve is continuous with the endocardium on the posterior wall of the left atrium, so that the posterior valve can be pulled when the left atrium is expanded, the effective area of the posterior valve is reduced, and MR can be caused.
The surgical replacement or repair treatment is still the first choice for patients with mitral insufficiency, but for the patients with advanced age, chest-opening history, poor cardiac function and combined multi-organ insufficiency, the surgical trauma is large, the healing is difficult, the complications are many, the risk is high, and even part of the patients cannot tolerate the surgical trauma.
In view of the above, the present invention has developed a device that addresses this problem without destroying the heart tissue to the maximum extent.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defects of the prior art and provides a protective device for mitral valve replacement surgery.
In order to realize the above purpose, the utility model adopts the following technical scheme:
a mitral valve annular constriction device comprises a constriction device, a constriction wire, an elongated body, an anchor; two ends of the elongated body are respectively provided with an anchoring hole and a tightening hole, the anchoring hole is connected with an anchoring piece, and the tightening hole is connected with a tightening wire; the tightening device comprises a protective sleeve, a ratchet knob and a wire bunching barrel, the ratchet knob is fixedly connected with the wire bunching barrel, and the protective sleeve is sleeved outside the wire bunching barrel; the ratchet knob is provided with a rotating shaft penetrating through the inside of the wire bundling cylinder, threading holes are formed in the periphery of the rotating shaft, the inside of the rotating shaft is hollowed out from the threading holes and penetrates to the bottom of the ratchet knob, and wire bundling holes corresponding to the threading holes of the rotating shaft are formed in the periphery of the wire bundling cylinder; the tightening line sequentially penetrates through the protective sleeve, the line bunching hole and the threading hole to the outside of the bottom of the ratchet knob; the tip of tightening line has anti-disengaging structure, the bottom of protective sheath has the spacing arch of annular.
Further, still include adjustable ring, adjustable ring is heliciform metal coil, adjustable ring sets up in the slender body, the protective sheath outside.
Further, the outer side of the adjustable ring is wrapped with a coating film, and the material of the coating film comprises one or more of PET and PTFE.
Furthermore, a first slot sleeved with a pushing rod of the conveying device is arranged on the side face of the ratchet knob, so that the ratchet knob rotates along with the rotation of the pushing rod.
Further, the protective sleeve comprises a tube core and an outer coating film coated outside the tube core; the tube core is of a hollow cylindrical structure and is used for enabling a tightening wire to penetrate through; the mantle is water-soluble biological medical material.
Further, the material of the tightening line is one or more of a polymer material with high biocompatibility and a metal material.
Further, the material of the elongated body is a memory metal; the intermediate section of elongate body is equipped with the development ring, the development ring is used for adjusting the position of elongate body.
Furthermore, the anchoring piece comprises a connecting part and an anchoring part fixedly connected with the connecting part, and a second slot spliced with the pushing rod of the conveying device is arranged at the top end of the connecting part so that the pushing rod is spliced with the connecting part; the anchoring part is of a spiral structure, and the tail end of the spiral structure is in a needle point shape.
Further, the outer diameter of the anchor anchoring portion is smaller than the bore diameter of the anchoring hole of the elongated body; the anchor connection has a diameter greater than the diameter of the anchoring hole of the elongated body.
Further, the diameter of the adjustable ring is larger than the diameters of the elongated body and the protective sleeve; the diameter of the adjustable ring is smaller than the diameter of the annular limiting bulge and the diameter of the anchoring hole of the elongated body.
Compared with the prior art, the ring-contracting device of the utility model reserves the valve leaves and the valve structure of the mitral valve, reserves the structure of the left ventricle to the maximum extent, and slows down the heart decline; and the treatment effect of mitral regurgitation is improved.
Drawings
Fig. 1 is a schematic view of a heart anatomy structure according to a first embodiment of the present invention;
fig. 2 is a structural diagram of a mitral valve annular reduction device according to a first embodiment of the present invention;
fig. 3 is a schematic structural view of a tightening device according to a first embodiment of the present invention;
fig. 4 is a schematic structural view of a ratchet knob and a wire bundling barrel according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of an elongated body according to a first embodiment of the present invention;
fig. 6 is a schematic structural view of an anchor according to a first embodiment of the present invention;
fig. 7 is a schematic view of an implanted adjustable ring according to a first embodiment of the present invention;
fig. 8 is a schematic view of an initial state of an adjustable ring according to a first embodiment of the present invention;
FIG. 9 is a view of the heart after implantation of the device according to the first embodiment of the present invention;
FIG. 10 is a top anatomical view of a heart after implantation of a device according to a first embodiment of the present invention;
wherein: 1. the superior vena cava; 2. the right atrium; 3. a coronary sinus entrance; 4. the coronary sinus; 5. the mitral annulus; 6. the left atrium; 7. the mitral valve; 8. posterior leaflet of mitral valve; 9. papillary muscles; 10. a left ventricle; 11. a right ventricle; 12. the tricuspid valve; 13. the inferior vena cava; 14. the heart septum; 15. an aortic valve; 20. a tightening device; 21. a protective sleeve; 22. an annular limiting bulge; 23. a die; 24. a mantle; 25. a ratchet knob; 251. a knob portion; 2511. a small hole; 252. a shaft; 253. a first beam hole; 254. a second wire harness hole; 255. a non-return pawl; 256. a ratchet wheel; 257. a first threading hole; 258. a second threading hole; 259. a first slot; 26. a wire bundling cylinder; 30. tightening the wire; 31. knotting; 40. an elongated body; 41. tightening the hole; 42. a developing ring; 43. an anchor hole; 50. an anchor; 51. a connecting portion; 511. a second slot; 52. an anchoring portion; 60. an adjustable ring; 60a, 60c, 60f. hard sections of adjustable rings; 60b, 60d. soft section of adjustable ring; and (5) coating 70.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The utility model aims at providing a mitral valve ring-contracting device aiming at the defects of the prior art.
The first embodiment is as follows:
as shown in fig. 1-10, a mitral valve annular constriction device of the present embodiment includes a tightening device 20, a tightening wire 30, an elongated body 40, an anchor 50, an adjustable ring 60, a cover 70; the two ends of the elongated body 40 are respectively an anchoring hole 43 and a tightening hole 41, the anchoring hole 43 is connected with the anchoring element 50, and the tightening hole 41 is connected with the tightening wire 30; the tightening device 20 comprises a protective sleeve 21, a ratchet knob 25 and a wire bundling cylinder 26, the ratchet knob 25 is fixedly connected with the wire bundling cylinder 26, and the protective sleeve 21 is sleeved outside the wire bundling cylinder 26; a small hole 2511 is arranged at the knob part 251 of the ratchet knob, the ratchet knob 25 is provided with a rotating shaft 252 which is arranged in the wire bundling cylinder in a penetrating way, a first threading hole 257 and a second threading hole 258 are arranged on the peripheral side of the rotating shaft 252, the interior of the rotating shaft 252 is hollowed out from the first threading hole 257 and the second threading hole 258 and penetrates to the bottom of the ratchet knob 25, and a first wire bundling hole 253 and a second wire bundling hole 254 which correspond to the first threading hole 257 and the second threading hole 258 of the rotating shaft 252 are arranged on the peripheral side of the wire bundling cylinder 26; the end of the tightening wire 30 has an anti-slip structure, and the bottom end of the protective sheath 21 has an annular limiting protrusion 22.
Fig. 1 shows a schematic diagram of the anatomy of the heart, including the superior vena cava 1, right atrium 2, coronary sinus access 3, coronary sinus 4, mitral annulus 5, left atrium 6, mitral valve 7, mitral valve posterior leaflet 8, papillary muscle 9, left ventricle 10, right ventricle 11, tricuspid valve 12, inferior vena cava 13, heart septum 14, aortic valve 15. Wherein part of the heart tissue is relevant for this embodiment.
Fig. 2 shows a mitral annuloplasty device, which includes a tightening device 20, a tightening wire 30, an elongated body 40, an anchor 50, an adjustable ring 60, and a cover 70. The drawings show the tightening wire 30 passing through the tightening hole 41 of the elongated body 40, and after the tightening wire 30 passes through the tightening hole 41 of the elongated body 40, one end of the tightening wire 30 passes through the protective sheath 21, the first lacing hole 253, the first threading hole 257 and out of the small hole 2511 of the ratchet knob in sequence; the other end of the tightening wire 30 sequentially passes through the protective sleeve 21, the second wire-bundling hole 254 and the second wire-threading hole 258 to the outside of the small hole 2511 of the ratchet knob; after the two ends of the tightening line 30 are arranged outside the small holes 2511 of the ratchet knob, the two lines are knotted to obtain the closed knotting point 31, so that the tightening line can be contracted when the ratchet knob 25 is used, the area of the mitral valve orifice is reduced, and the reflux is reduced.
The material of the tightening line 30 is made of a high polymer material with high biocompatibility and a soft metal material, so that the internal endothelialization can be better realized while the strength is ensured. The medical suture prepared by the composite spinning technology is wide in application, firstly, the medical suture is the most widely applied biomedical functional material, and the valve suture prepared by the composite spinning technology has good structural compatibility and biocompatibility, so that the medical suture is widely applied to the aspects of biomembranes, medical stents, slow-release medicines and the like, and can ensure strength and better endothelialization. Secondly, the valve suture thread made by the composite spinning technology has large specific surface area, so the valve suture thread is an ideal endothelialization material. In addition, the valve suture thread prepared by the composite spinning technology has stronger physical properties than the common suture thread, so the valve suture thread can be applied to the process of preparing the heart valve. The suture prepared by the suture composite spinning method is also applied to sensors, electronic materials, novel special fibers and the like, clothing and the like. The polymer is spun on the thread by a composite spinning method, so that a layer of compact nanofiber membrane is formed on the surface of the thread, and the thread with the nanofiber membrane on the surface can be applied to various occasions, most commonly applied to medical treatment.
As shown in fig. 3, which is a schematic structural diagram of the tightening device 20, the tightening device 20 includes a protective sleeve 21, a ratchet knob 25, and a wire harness barrel 26, the ratchet knob 25 is fixedly connected to the wire harness barrel 26, and the protective sleeve 21 is sleeved outside the wire harness barrel 26; the bottom end of the protective sleeve 21 is provided with an annular limiting bulge 22. The protective sheath 21 is used to protect the coronary sinus and the surrounding heart tissue to prevent the cinching cord from causing an embedded damage to the tissue in this area, and also to secure the cinching device and cinching cord; annular stop boss 22 serves to prevent tightening knob 20 from further entering the coronary sinus, causing damage to cardiac tissue; the ratchet knob 25 is used to tighten the takeup wire 30.
The protective sheath 21 of the tightening device 20 has a hollow cylindrical structure for passing the tightening wire therethrough. The protective sleeve 21 is composed of a tube core 23 and an outer coating film 24 coated outside the tube core 23. In this embodiment, the material of the tube core 23 is preferably a silicone rubber, thermoplastic polyurethane elastomer (TPU) or Thermoplastic Polyolefin Elastomer (TPE) catheter meeting the medical implantation standard, and the purpose thereof is to ensure the mechanical strength and the supporting capability of the tube body, so that the tube body will not be bent due to over-soft collapse of the material or insufficient strength under the tension of the tightening wire 30, and the occurrence of treatment failure due to the mechanical problem of the material is avoided. The outer anti-adhesion layer of the mantle 24 is made of water-soluble biomedical materials, so as to prevent tearing injury caused by adhesion.
As shown in FIG. 4, which is a schematic view of the ratchet knob and the wire barrel, the knob portion 251 of the ratchet knob 25 is provided with an aperture 2511 for passing the tightening wire 30 therethrough; the side of the ratchet knob 25 is provided with a first slot 259 sleeved with the pushing rod of the delivery device, so that the ratchet knob 25 rotates along with the rotation of the pushing rod.
An inner clamping ratchet mechanism is adopted inside the ratchet knob 25 and comprises a check pawl 255 and a ratchet wheel 256, and the check pawl 255 slides on the tooth back of the ratchet wheel 256 when the ratchet knob 25 is rotated; if the ratchet knob is rotated reversely, the non-return pawl 255 is inserted into the tooth groove of the ratchet 256 to prevent the ratchet 256 from rotating in the reverse direction, so that the ratchet knob 25 can only rotate in one direction to prevent the tension line from loosening due to the non-return force and the tension force for contracting the mitral valve orifice from being maintained. It should be noted that the ratchet mechanism is similar to the principle in the prior art, and is not described herein.
The wire harness barrel 26 is hollow, and the periphery of the wire harness barrel 26 is provided with a first wire harness hole 253 and a second wire harness hole 254, and the wire harness hole 253 and the second wire harness hole 254 are used for allowing the tightening wire 30 to pass through.
The ratchet knob 25 further has a rotating shaft 252 penetrating through the wire bundling cylinder 26, the rotating shaft 252 is a hollow cylindrical structure, a first wire threading hole 257 and a second wire threading hole 258 corresponding to the first wire bundling hole 253 and the second wire bundling hole 254 of the wire bundling cylinder 26 are arranged on the periphery of the rotating shaft 252, and the rotating shaft 252 is hollowed out from the first wire threading hole 257 and the second wire threading hole 258 and penetrates to the bottom of the ratchet knob 25.
Fig. 5 shows a schematic structural view of the elongated body. Wherein one end of the elongated body 40 is provided with a tightening hole 41 for connecting the tightening wire 30; a developing ring 42 is arranged at the middle part of the elongated body 40, is suitable for Digital Silhouette Angiography (DSA) analysis and is used for adjusting the position of the elongated body 40; the other end of the elongated body 40 is provided with an anchoring hole 43 for implanting an anchor 50 therethrough to fix the anchoring hole 43.
In this embodiment, the elongated body 40 is made of a memory metal, preferably a memory alloy, wherein the memory alloy is preferably a nickel titanium alloy, which is a special alloy that automatically returns its plastic deformation to its original shape at a certain temperature. The memory alloy is resilient, in that the active portion of the elongated body 40 in its original state is substantially straight and will bend to some extent under the tension of the tightening wire 30, but the final curvature is still less than that of the mitral valve posterior leaflet to ensure that it can continue to exert constraint on the mitral valve annulus.
The elongated body 40 is to be inserted into the coronary sinus adjacent the posterior leaflet of the mitral valve, the curvature of the elongated body 40 being less than the curvature of the segment of the coronary sinus such that the curvature of the coronary sinus does not further increase when tightened up and the posterior leaflet moves toward the anterior leaflet to improve coaptation of the anterior and posterior leaflets.
The elongated body 40 is substantially flat (less curvature) in its initial state without external forces. When the tightening wire 30 is in a tightened state, it is deformed by tension, and is bent to a certain extent, and the curvature of the wire when reaching the maximum bending amount is still smaller than that of the coronary sinus at the implanted position. The mid-section of the elongated body will now exert a forward force to move the adjacent posterior leaflet forward, further improving leaflet coaptation and reducing regurgitation.
As shown in fig. 6, the anchor 50 includes a connecting portion 51 and an anchoring portion 52 fixedly connected to the connecting portion, and the anchor 50 is used for fixing the anchoring hole 43 of the elongated body 40. The top end of the connecting part 51 is provided with a second slot 511 which is inserted with the pushing rod of the conveying device so as to ensure that the pushing rod is inserted with the connecting part; the anchor portion 52 has a spiral structure, and the tip of the spiral structure is pointed. Wherein anchoring portion 52 is passed through anchoring hole 43 of the distal portion of elongated body 40 and the implantable ventricular septum is rotated by an external force, leaving connecting portion 51 externally fixed. 511 is an anchor insertion slot, which can be inserted into the pushing rod of the conveyor, and the pushing rod can be rotated to control the rotation thereof, so that the anchor can be penetrated into the heart tissue by rotating the pushing rod.
The anchoring member 50 is required to fix the anchoring hole 43 of the elongated body 40, so that the outer diameter of the spiral structure of the anchoring portion 52 must be smaller than the diameter of the anchoring hole 43 of the elongated body 40, and the maximum diameter of the connecting portion 51 must be larger than the diameter of the anchoring hole 43 of the elongated body 40.
As shown in fig. 7, which is a schematic view after implantation of the adjustable ring, the adjustable ring 60 is disposed outside the elongated body 40 and the protective sheath 21; the adjustable ring 60 is a helical metal coil, and the material is preferably nickel titanium alloy with good elasticity. The adjustable ring 60 can be divided into hard sections 60a, 60c and 60f and soft sections 60b and 60d according to the density and rigidity. The hard sections 60a, 60c and 60f have dense coils and good rigidity, so that the shaping is facilitated; the soft sections 60b and 60d are relatively loose coils and relatively weak in rigidity, and are convenient to bend and compress. I.e., the soft segments 60b and 60d are preferentially compressed when the cinch line 30 is adjusted. Fig. 8 is a schematic view of the initial state of the adjustable ring 60.
The diameter of adjustable ring 60 is greater than the diameter of elongated body 40 and protective sheath 21; the diameter of the adjustable ring 60 is smaller than the diameter of the annular stop lug 22 and the anchoring hole 43 of the elongated body, one end of the adjustable ring abuts against one side of the annular stop lug 22, and the other end of the adjustable ring abuts against one side of the anchoring hole 43.
The adjustable ring 60 is surrounded by a cover 70 to protect the coronary sinus and increase the rate of endothelialization of the constriction device. The material of the coating film 70 is PET or PTFE, and the composite spinning technology is preferably selected as the preparation process. The traditional common film covering can be completed only in 8-16 months or even longer, the film covering in the embodiment can be completed in endothelialization within 2-3 months, and the compound spinning technology is benefited.
Figs. 9-10 show top anatomical views of the heart after implantation of the present device, to more clearly and visually illustrate the implanted state of the ring-down device. The adjustable ring and the cover are hidden in fig. 10. The coronary sinus, typically about 8cm, extends generally adjacent the mitral valve posterior leaflet annulus, and the natural curvature of the segment of the coronary sinus can be modified by implanting the elongated body 40 to correspondingly modify the curvature of the mitral valve posterior leaflet. Moreover, with the elongated body 40 in this position, the change in curvature of the posterior leaflet of the mitral valve can be effectively constrained during tightening, allowing the posterior annulus to move forward, facilitating improved leaflet coaptation, and thereby reducing mitral regurgitation.
The ring-contracting device of the embodiment reserves valve leaflets and an infravalvular structure of the mitral valve, furthest reserves a left ventricle structure and slows down heart recession; and the treatment effect of mitral regurgitation is improved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. A mitral valve annular constriction device, comprising a tightening device, a tightening wire, an elongated body, an anchor; two ends of the elongated body are respectively provided with an anchoring hole and a tightening hole, the anchoring hole is connected with an anchoring piece, and the tightening hole is connected with a tightening wire; the tightening device comprises a protective sleeve, a ratchet knob and a wire bunching barrel, the ratchet knob is fixedly connected with the wire bunching barrel, and the protective sleeve is sleeved outside the wire bunching barrel; the ratchet knob is provided with a rotating shaft penetrating through the inside of the wire bundling cylinder, threading holes are formed in the periphery of the rotating shaft, the inside of the rotating shaft is hollowed out from the threading holes and penetrates to the bottom of the ratchet knob, and wire bundling holes corresponding to the threading holes of the rotating shaft are formed in the periphery of the wire bundling cylinder; the tightening line sequentially penetrates through the protective sleeve, the line bunching hole and the threading hole to the outside of the bottom of the ratchet knob; the tip of tightening line has anti-disengaging structure, the bottom of protective sheath has the spacing arch of annular.
2. The mitral valve annuloplasty device of claim 1, further comprising an adjustable ring, the adjustable ring being a helical metal coil, the adjustable ring disposed outside the elongated body and the protective sheath.
3. The mitral valve annuloplasty device of claim 2, wherein the outer side of said adjustable ring is covered with a covering membrane, and the material of said covering membrane comprises one of PET and PTFE.
4. The mitral valve annulus constriction device of claim 1, wherein the ratchet knob has a first slot on a side thereof for engaging with a push rod of the delivery device, so that the ratchet knob rotates with the rotation of the push rod.
5. The mitral valve annular contraction device of claim 1, wherein the protective sheath comprises a core and an outer coating covering the core; the tube core is of a hollow cylindrical structure and is used for enabling a tightening wire to penetrate through; the mantle is water-soluble biological medical material.
6. The mitral valve annulus constriction device of claim 1, wherein the tightening wire is made of one of a biocompatible polymer material and a metal material.
7. The mitral valve annulus constriction device of claim 1, wherein the material of the elongate body is a memory metal; the intermediate section of elongate body is equipped with the development ring, the development ring is used for adjusting the position of elongate body.
8. The mitral valve annuloplasty device of claim 1, wherein the anchor comprises a connecting portion and an anchoring portion fixedly connected to the connecting portion, the connecting portion having a second slot at a top end thereof for engaging with a push rod of the delivery device, so that the push rod engages with the connecting portion; the anchoring part is of a spiral structure, and the tail end of the spiral structure is in a needle point shape.
9. The mitral valve annulus constriction device of claim 8, wherein the anchor anchoring portion has an outer diameter smaller than the bore diameter of the anchoring bore of the elongate body; the anchor connection has a diameter greater than the diameter of the anchoring hole of the elongated body.
10. The mitral valve annuloplasty device of claim 2, wherein the adjustable ring has a diameter larger than the diameter of the elongated body and the protective sheath; the diameter of the adjustable ring is smaller than the diameter of the annular limiting bulge and the diameter of the anchoring hole of the elongated body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189129.9U CN212281775U (en) | 2020-06-24 | 2020-06-24 | Mitral valve annular device that contracts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021189129.9U CN212281775U (en) | 2020-06-24 | 2020-06-24 | Mitral valve annular device that contracts |
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| CN212281775U true CN212281775U (en) | 2021-01-05 |
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| CN202021189129.9U Active CN212281775U (en) | 2020-06-24 | 2020-06-24 | Mitral valve annular device that contracts |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111616837A (en) * | 2020-06-24 | 2020-09-04 | 科凯(南通)生命科学有限公司 | A mitral valve annulus retractor |
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2020
- 2020-06-24 CN CN202021189129.9U patent/CN212281775U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111616837A (en) * | 2020-06-24 | 2020-09-04 | 科凯(南通)生命科学有限公司 | A mitral valve annulus retractor |
| CN111616837B (en) * | 2020-06-24 | 2025-03-04 | 科凯(南通)生命科学有限公司 | A mitral valve annulus contraction device |
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Address after: No.10 Yongfu Road, shibeikeji City, Gangzha District, Nantong City, Jiangsu Province, 226000 Patentee after: KEKAI (NANTONG) LIFE SCIENCE Co.,Ltd. Address before: 2269, Liugang Road, Nantong City, Jiangsu Province Patentee before: KEKAI (NANTONG) LIFE SCIENCE Co.,Ltd. |