Annuloplasty device

Abstract

The application discloses a valve annulus plication device. The valve annulus plication device comprises a main body, an upper clamping arm, a lower clamping arm, a puncture needle and a top control block. The main body has a distal end and a proximal end. The upper clamping arm is arranged near the distal end of the main body. The lower clamping arm is arranged near the proximal end of the main body and is used for supporting valve annulus tissue. The puncture needle is arranged in the main body and the upper clamping arm and can be taken out of the main body and the upper clamping arm to puncture the valve annulus tissue. The top control block is arranged at the distal end of the main body and is used for controlling the puncture needle to be taken out of the upper clamping arm or to be taken back into the main body and the upper clamping arm. The technical scheme of the application can improve the puncture success rate.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a valve annulus shrinkage device. Background Technology

[0002] The mitral valve (also known as the left atrioventricular valve) has two main leaflets (anterior and posterior leaflets) and a subvalvular structure consisting of chordae tendineae attached to the anterior and posterior papillary muscles of the left ventricle. A healthy mitral valve allows blood to flow unimpeded from the left atrium to the left ventricle during diastole and prevents regurgitation during systole. The function of a normal mitral valve depends not only on the integrity of the underlying valvular structures but also on the adjacent myocardium.

[0003] In some patients, whether due to genetic malformation, disease, or injury, the mitral valve cannot close properly, leading to a condition called regurgitation, where blood is pumped into the atria with each heart contraction. Regurgitation is a serious condition that often worsens rapidly, reducing circulatory efficiency and must be corrected. Common treatments include surgical or minimally invasive procedures. Surgical procedures require an incision in the chest to access the heart, performed with the aid of external circulation equipment. Typically, an angioplasty ring is used to fix and suture near the mitral valve, or a mechanical valve is used to replace the mitral valve; however, this procedure often carries a higher risk. Minimally invasive interventional procedures utilize vascular access or a tiny incision at the apex of the heart to deliver instruments through a catheter to the designated location, or the instruments are directly inserted into the designated location. There are many ways to treat mitral regurgitation, including surgery on the mitral valve annulus to achieve annular contraction. This is divided into direct and indirect annular contraction. Indirect annular contraction uses the tightening of the blood vessels surrounding the mitral valve to achieve contraction of the mitral valve annulus, allowing the mitral valve leaflets to close tightly. Direct annular contraction can be divided into direct annular contraction of the valve annulus by direct forming of the annulus, and contraction of a portion of the valve annulus to reduce the size of the mitral valve annulus and make the mitral valve leaflet close tightly.

[0004] In the existing method of reducing the mitral valve annulus by directly tightening a portion of the annulus, the lower clamping arm of the annulus-retracting device holds the annulus in place, and a puncture needle is used to directly puncture the annulus. However, the annulus tissue is a relatively tough tissue, and it is difficult to puncture successfully if the puncture needle does not have sufficient puncture force, which may result in the puncture needle bending.

[0005] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0006] This application provides a valve annulus retraction device to solve the technical problem of low puncture success rate in valve annulus retraction devices.

[0007] This application provides a valve annulus retraction device, comprising a main body, an upper clamping arm, a lower clamping arm, a puncture needle, and a top control block. The main body has a distal end and a proximal end. The upper clamping arm is located near the distal end of the main body, and the lower clamping arm is located near the proximal end of the main body. The lower clamping arm is used to support the valve annulus tissue. The puncture needle is located within the main body and the upper clamping arm, and can extend from the main body and the upper clamping arm to puncture the valve annulus tissue. The top control block is located at the distal end of the main body, and is used to control the puncture needle to extend from the upper clamping arm or to retract the puncture needle back into the main body and the upper clamping arm.

[0008] In one possible implementation, the top control block has a through-hole and a pull rope hole. The through-hole is used to install the puncture needle, and one end of the puncture needle is fixedly connected to the through-hole. The pull rope hole is used to fix the pull rope. The main body has a pull rope channel for the pull rope to pass through. The pull rope is used to control the movement of the top control block. The main body and the top control block have coaxial track holes. A track is installed in the track hole, and the top control block can reciprocate along the track.

[0009] In one possible implementation, the upper clamping arm has a through-hole for the puncture needle to pass through, the upper clamping arm has a connecting end connected to the main body and a free end opposite to the connecting end, and the connecting end of the upper clamping arm is rotatably connected to the main body.

[0010] In one possible implementation, the connecting end of the upper clamping arm has a first surface and a second surface that contacts the first surface. A control groove is formed on the first surface, and a first wire hole for the first control wire to pass through is formed on the second surface. A fixing sleeve is fixedly connected to one end of the first control wire. The diameter of the fixing sleeve is larger than the diameter of the first wire hole, so as to lock the fixing sleeve in the control groove.

[0011] In one possible implementation, the upper clamping arm is a movable block that can slide out from the main body. A control element for controlling the movement of the movable block is provided between the top control block and the main body. The control element has a through hole for the puncture needle to pass through and a through hole for the pull rope to pass through. An elastic element is provided over the pull rope between the top control block and the control element. A second wire hole for fixing the second control wire is provided on the control element. One end of the second control wire is fixed in the second wire hole, and the other end of the second control wire is fixed in the movable block.

[0012] In one possible implementation, the movable block has a third wire hole for placing the second control wire. The third wire hole includes a first segment, a second segment, and a third segment. The second segment is located between the first segment and the third segment. The diameter of the first segment is equal to the diameter of the third segment, and the diameter of the second segment is smaller than the diameter of the first segment.

[0013] In one possible implementation, the upper clamping arm includes a sleeve, and the outer periphery of the end of the puncture needle is provided with a spring sheet at intervals. The top control block is provided with a fourth wire hole for fixing a third control wire. One end of the third control wire is fixed in the fourth wire hole, and the other end of the third control wire is fixedly connected to the sleeve.

[0014] In one possible implementation, the sleeve is provided with three sections: a first section sleeve, a second section sleeve, and a third section sleeve. The outer diameters of the first section sleeve, the second section sleeve, and the third section sleeve decrease sequentially. The second section sleeve can retract into the first section sleeve, and the third section sleeve can retract into the second section sleeve. The other end of the third control wire is fixedly connected to the first section sleeve.

[0015] In one possible implementation, the third sleeve is provided with a first limiting structure, and the second sleeve is provided with a second limiting structure. The second limiting structure prevents the second sleeve from detaching from the first sleeve when it extends, and the first limiting structure prevents the third sleeve from detaching from the second sleeve when it extends.

[0016] In one possible implementation, the top control block cover is provided with a guide.

[0017] In the technical solution proposed in this invention, the annular constriction device is configured to include a main body, an upper clamping arm, a lower clamping arm, a puncture needle, and a top control block. The main body has a distal end and a proximal end. The upper clamping arm is located near the distal end of the main body, and the lower clamping arm is located near the proximal end of the main body. The lower clamping arm supports the annular tissue. The puncture needle is located within the main body and the upper clamping arm, and can pass through the main body and the upper clamping arm to puncture the annular tissue. The top control block is located at the distal end of the main body and is used to control the puncture needle to exit from the upper clamping arm or to retract the puncture needle back into the main body and the upper clamping arm. By providing an upper and lower clamping arm on the annular constriction device, when puncturing the annular tissue, the lower clamping arm supports the annular tissue. Because the upper clamping arm has a certain length, the puncture needle passes through the upper clamping arm before puncturing the annular tissue, thus providing a certain degree of restraint on the puncture needle and improving the puncture accuracy and success rate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 The diagram schematically illustrates the structure of the upper and lower clamping arms of the first embodiment of the valve ring shrinking device of the present invention when they are not open.

[0020] Figure 2 A schematic diagram of the structure of the first embodiment of the annular retraction device of the present invention, in which both the upper and lower clamping arms are open, is shown.

[0021] Figure 3 A schematic diagram of the upper clamping arm is shown in the first embodiment of the valve ring shrinking device of the present invention;

[0022] Figure 4 for Figure 1 A structural diagram from another perspective;

[0023] Figure 5 for Figure 4 Enlarged structural diagram at point A;

[0024] Figure 6 The diagram schematically illustrates the partial structure of the upper clamping arm opening in the first embodiment of the valve ring retraction device of the present invention;

[0025] Figure 7 The diagram illustrates the structure of the puncture needle in the first embodiment of the valve annulus retraction device of the present invention.

[0026] Figure 8 A schematic diagram of the structure including a guide member is shown in the first embodiment of the valve ring retraction device of the present invention;

[0027] Figure 9 The diagram schematically illustrates a cross-sectional structure when both the upper and lower clamping arms are open in the first embodiment of the valve ring retraction device of the present invention.

[0028] Figure 10 A schematic diagram of the lower clamping arm is shown in the first embodiment of the valve ring shrinking device of the present invention;

[0029] Figure 11 A schematic diagram of the mesh structure of the lower clamping arm in the first embodiment of the valve ring shrinking device of the present invention is shown.

[0030] Figure 12The diagram schematically illustrates the structure of the lower clamping arm being opened in the first embodiment of the valve ring retraction device of the present invention;

[0031] Figure 13 A schematic diagram of the structure of the top control block in the first embodiment of the valve ring shrinkage device of the present invention is shown.

[0032] Figure 14 A schematic diagram of the structure of a second embodiment of the valve ring shrinking device of the present invention is shown.

[0033] Figure 15 for Figure 14 Another structural diagram from another perspective;

[0034] Figure 16 The diagram schematically illustrates a second embodiment of the valve annulus shrinkage device of the present invention from another perspective.

[0035] Figure 17 A schematic cross-sectional view of a second embodiment of the valve ring shrinking device of the present invention is shown.

[0036] Figure 18 The diagram illustrates the structure of the puncture needle in a second embodiment of the valve annulus retraction device of the present invention.

[0037] Figure 19 A schematic diagram of the top control block is shown in the second embodiment of the valve ring shrinkage device of the present invention;

[0038] Figure 20 A schematic diagram of the moving block structure is shown in the second embodiment of the valve ring shrinking device of the present invention;

[0039] Figure 21 A schematic diagram of the structure of the third wire hole of the moving block in the second embodiment of the valve ring shrinking device of the present invention is shown.

[0040] Figure 22 schematically shown Figure 21 A schematic diagram of the structure after the second control wire is fixed in the third wire hole;

[0041] Figure 23 A schematic diagram of the puncture needle structure in the third embodiment of the valve annulus retraction device of the present invention is shown.

[0042] Figure 24 A schematic diagram of the structure of the third embodiment of the valve ring shrinking device of the present invention is shown.

[0043] Figure 25 The diagram illustrates the structure of the puncture needle in a third embodiment of the valve annulus retraction device of the present invention.

[0044] Figure 26 A schematic cross-sectional view of the third embodiment of the valve ring shrinking device of the present invention is shown.

[0045] Figure 27 A schematic diagram of the sleeve structure in the third embodiment of the valve ring shrinking device of the present invention is shown;

[0046] Figure 28 A schematic diagram of the cross-sectional structure of the sleeve in the third embodiment of the annular shrinkage device of the present invention is shown.

[0047] Reference numerals: 1-Main body, 2-Upper clamping arm, 2'-Moving block, 21-Piercing channel, 22-Connecting end, 221-First surface, 221a-Control groove, 222-Second surface, 222a-First wire hole, 23-Free end, 24-Third wire hole, 241-First segment, 242-Second segment, 243-Third segment, 25-First sleeve section, 26-Second sleeve section, 261-Second limiting mechanism, 27-Third sleeve section, 271-First limiting structure, 28 - Shaft hole, 3- Lower clamping arm, 31- Rotating shaft, 32- Control line, 33- Mesh structure, 4- Puncture needle, 41- Spring piece, 42- Threaded section, 5- Top control block, 51- Puncture hole, 52- Pull rope hole, 53- Track hole, 54- Fourth thread hole, 61- Pull rope, 62- First control thread, 621- Fixing sleeve, 63- Second control thread, 631- Collar, 64- Third control thread, 7- Track, 8- Control component, 81- Elastic component, 82- Second thread hole, 9- Guide component. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0050] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0053] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the medical device field. "Distal" refers to the end furthest from the operator during surgery, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction parallel to the line connecting the distal and proximal centers of the medical device; radial direction refers to the direction perpendicular to the aforementioned axial direction.

[0054] Please see Figures 1 to 13 The present invention proposes a valve annulus retraction device, which includes a main body 1, an upper clamping arm 2, a lower clamping arm 3, a puncture needle 4, and a top control block 5. The main body 1 has a distal end and a proximal end. The upper clamping arm 2 is located near the distal end of the main body 1, and the lower clamping arm 3 is located near the proximal end of the main body 1. The lower clamping arm 3 is used to support the valve annulus tissue. The puncture needle 5 is located within the main body 1 and the upper clamping arm 2. The puncture needle 4 can pass through the main body 1 and the upper clamping arm 2 to puncture the valve annulus tissue. The top control block 5 is located at the distal end of the main body 1. The top control block 5 is used to control the puncture needle 4 to pass through the upper clamping arm 2 or to retract the puncture needle 4 into the main body 1 and the upper clamping arm 2.

[0055] Specifically, the lower clamping arm 3 can be rotatably connected to the main body 1, such as... Figures 9 to 12As shown, the lower clamping arm 3 can be rotatably connected to the main body 1 via a rotating shaft 31. A control wire 32 can be welded onto the lower clamping arm 3. The welding method can be that the lower clamping arm 3 has a hole, the control wire 32 passes through the hole and is welded to the lower clamping arm 3. The control wire 32 can be made of stainless steel wire, nickel-titanium wire, etc. For stability, it can be made of multi-strand wire. Thus, by pulling the control wire 32, the relative rotation between the lower clamping arm 3 and the main body 1 can be controlled, thereby opening and closing the lower clamping arm 3. The valve annulus retraction device may also include a handle (not shown in the figure), which may contain a component for pulling the control wire 32. To save space and for a more compact component arrangement, the main body 1 is preferably configured as approximately cylindrical. The distal end of the main body 1 is the end furthest from the operator during surgery, and the proximal end of the main body 1 is the end closer to the operator than the distal end during surgery.

[0056] Please see Figures 1 to 7 The upper clamping arm 2 can also be opened or closed from the main body 1. After the lower clamping arm 3 successfully supports the valve annulus tissue, the upper clamping arm 2 can be opened, and then the top control block 5 controls the puncture needle 4 to pass through the upper clamping arm 2 and then puncture the valve annulus tissue. Because the upper clamping arm 2 has a certain length, the puncture needle 4 also has a certain length inside the upper clamping arm 2. When puncturing, the puncture needle 4 is not completely placed outside the main body 1, but is retained partially inside the upper clamping arm 2. Because the valve annulus tissue is a relatively tough tissue, if the puncture needle 4 is directly passed through the main body 1 and then punctured into the valve annulus tissue, the puncture force may be insufficient, making puncture difficult and causing the puncture needle 4 to bend. By setting the upper clamping arm 2 and the lower clamping arm 3 to cooperate with each other, the upper clamping arm 2 has a certain length, and the puncture needle 4 passes through the upper clamping arm 2 before puncturing. The upper clamping arm 2 has a certain limiting and supporting effect on the puncture needle 4, which avoids the puncture needle 4 being difficult to puncture successfully if it is directly punctured, and the puncture needle 4 is prone to bending.

[0057] In one or more embodiments, please refer to Figure 1 , Figure 2 , Figure 7 , Figure 8 and Figure 13The top control block 5 has a through-hole 51 and a pull rope hole 52. The through-hole 51 is used to install the puncture needle 4, and one end of the puncture needle 4 is fixedly connected to the through-hole 51. The pull rope hole 52 is used to fix the pull rope 61. A pull rope channel is provided inside the main body 1 for the pull rope 61 to pass through. The pull rope 61 is used to control the movement of the top control block 5. The main body 1 and the top control block 5 have coaxial track holes 53. A track 7 is installed in the track hole 53, and the top control block 5 can move back and forth along the track 7. The shape of the top control block 5 is roughly the same as that of the main body, such as cylindrical. One end of the puncture needle 4 is fixedly connected to the through-hole 51 by welding, so that their relative positions are fixed. This way, when the top control block 5 slides, the puncture needle 4 is also moved to slide together. The top control block 5 moves along the axial direction of the main body 1. A coaxial track hole 53 is formed on both the main body 1 and the top control block 5. A track 7 is installed within the track hole 53, meaning the track 7 passes through both the main body 1 and the top control block 5. The proximal end of the track 7 can be welded to the main body 1, allowing the top control block 5 to move back and forth on the track 7 at its distal end. To prevent the top control block 5 and the puncture needle 4 from shifting, the cross-sectional shape of the track 7 can be polygonal, elliptical, etc., as long as it is not circular, ensuring that the top control block 5 does not rotate relative to the track 7, but only moves relative to it. A pull rope hole 52 also passes through the top control block 5, and a pull rope 61 is fixed within the pull rope hole 52. The fixing method can be welding or other methods, as long as one end of the pull rope 61 can be fixed within the pull rope hole 52. The pull rope 61 can be made of stainless steel wire, nickel-titanium wire, etc., and for stability, it can be made of multi-strand wire. Thus, by pulling the pull cord 61, the top control block 5 can be moved along the track 7. The movement of the top control block 5, in turn, moves the puncture needle 4. The puncture needle 4 can then pass through the main body 1 and the upper clamping arm 2 to achieve the needle withdrawal action and puncture the annular tissue. The puncture needle 4 can be made of stainless steel and is a hollow stainless steel tube with a threaded section. The threaded section increases the flexibility of the puncture needle 4 when bent. The needle tip can be designed as a triangular tip to make the puncture needle 4 sharper. The annular tissue is a tissue with a certain degree of toughness, and this design makes it easier for the puncture needle 4 to puncture the annular tissue. Specifically, the pull cord 61 can be pulled by a component inside the handle of the annular retraction device. There can be one or more pull cord holes. To make the process of pulling the top control block 5 smoother, preferably, there are two pull cord holes 52, and correspondingly two pull cords 61. The positions of the two pull cord holes 52 are symmetrical with respect to the line connecting the puncture hole 51 and the track hole 53.

[0058] Among them, such as Figure 1 and Figure 4The diagram shows the structure where the puncture needle 4 is still inside the upper clamp arm 2 and the main body 1 and has not yet exited the body. Figure 7 The diagram shows the state of the puncture needle 4 after it has been withdrawn, that is, the top control block 5 has moved a certain distance from the far end of the main body 1 to the proximal end of the main body 1.

[0059] In one or more embodiments, please refer to Figures 3 to 6 as well as Figure 9 The upper clamping arm 2 has a puncture channel 21 through which the puncture needle 4 passes. The upper clamping arm 2 has a connecting end 22 connected to the main body 1 and a free end 23 opposite to the connecting end 22. The connecting end 22 of the upper clamping arm 2 is rotatably connected to the main body 1. Figure 3 As shown, the upper clamping arm 2 is a cuboid shape. Its connecting end 22 is rotatably connected to the main body 1. The connecting end 22 of the upper clamping arm 2 can be designed with an irregular shape. The connecting end 22 of the upper clamping arm 2 can be rotatably connected to the main body 1 via a rotating shaft. That is, a shaft hole 28 for the rotating shaft to pass through is provided on the connecting end 22 of the upper clamping arm 2. The rotating shaft is fixedly connected to the main body 1, thus enabling the upper clamping arm 2 to rotate around the rotating shaft, thereby opening and closing the upper clamping arm 2. Opening the upper clamping arm 2 means that the upper clamping arm 2 and the main body 1 have a certain angle; closing the upper clamping arm 2 means that the upper clamping arm 2 is fitted onto the main body 1. By setting the upper clamping arm 2, and when the puncture needle 4 is withdrawn, the puncture needle 4 is partially confined within the upper clamping arm 2, which protects and restricts the puncture needle 4, reducing the suspended length of the puncture needle 4 during withdrawal. This prevents the puncture needle 4 from bending during puncture and increases the puncture force of the puncture needle 4, allowing for successful puncture even into more resilient annular tissue.

[0060] In one or more embodiments, please continue to refer to Figures 3 to 6The connecting end 22 of the upper clamping arm 2 has a first surface 221 and a second surface 222 adjacent to the first surface 221. A control groove 221a is formed on the first surface 221, and a first wire hole 222a for the first control wire 62 to pass through is formed on the second surface 222. One end of the first control wire 62 is fixedly connected to a fixing sleeve 621. The diameter of the fixing sleeve 621 is larger than the diameter of the first wire hole 222a, so that the fixing sleeve 621 is secured within the control groove 221a. The first control wire 62 can be made of stainless steel wire or nickel-titanium wire. To improve stability, the first control wire 62 can also be made of multiple strands. One end of the first control wire 62 can be fixedly connected to the fixing sleeve 621 by welding. To improve the welding strength between the two, preferably, the material of the fixing sleeve 621 is the same as that of the first control wire 62. Welding two parts made of the same material results in stronger stability. Because the fixing sleeve 621 is secured within the control groove 221a, the upper clamping arm 2 can be opened or closed by pulling the first control wire 62. Because the materials of the first control wire 62 and the main body 1 are different, if the first control wire 62 is directly welded to the main body 1, the welding may be unstable due to the different materials. Therefore, by setting the materials of the first control wire 62 and the fixing sleeve 621 to be the same, and by fixing the fixing sleeve 621 in the control groove 221a, it is possible to achieve the opening or closing of the upper clamping arm 2 by pulling the first control wire 62 without directly welding it to the main body 1.

[0061] The puncture needle 4 has a slot for assembling a limiting anchor. The anchor is installed in this slot. (See attached image.) Figure 11 The lower clamping arm 3 is provided with a mesh structure 33, which can be a PET mesh film. The PET mesh film has a certain degree of softness and a relatively dense mesh. The function of the mesh structure 33 is that after the puncture needle 4 punctures, the anchor can be stuck on the mesh structure 33 and will not fall off.

[0062] The general operating steps of this annular constriction device are as follows:

[0063] 1. After the lower clamping arm 3 supports and holds the valve annulus tissue, the upper clamping arm 2 is opened;

[0064] 2. After the upper clamping arm 2 is opened to the predetermined position, the needle is then inserted for puncture. The puncture needle 4 punctures the valve annulus tissue and the mesh structure on the lower clamping arm 3. Then the anchor on the puncture needle 4 is hooked onto the mesh structure on the lower clamping arm 3.

[0065] 3. The puncture needle 4 is retracted, and the anchor and the suture on the anchor are hooked together onto the mesh structure 33 on the lower clamp arm 3, and then the upper clamp arm 2 is closed;

[0066] 4. Slowly withdraw the lower clamp arm 3 from the vicinity of the valve annulus tissue. After withdrawal, close the lower clamp arm 3 to suture the suture to the valve annulus tissue.

[0067] The above are some of the steps of the valve annulus retraction device. Since the valve annulus retraction device also includes other components not mentioned in this application, the other steps will not be described in detail.

[0068] In one or more embodiments, please refer to Figures 14 to 22 The upper clamping arm is a movable block 2', which can slide out from the main body 1. A control element 8 for controlling the movement of the movable block 2' is provided between the top control block 5 and the main body 1. The control element 8 has a through hole for the puncture needle 4 to pass through and a through hole for the pull rope 61 to pass through. An elastic element 81 is sleeved on the pull rope 61 between the top control block 5 and the control element 8. A second wire hole 82 for fixing the second control wire 63 is provided on the control element 8. One end of the second control wire 63 is fixed in the second wire hole 82, and the other end is fixed in the movable block 2'. The upper clamping arm is the movable block 2', meaning that the movable block 2' also has a puncture channel for the puncture needle 4 to pass through. Preferably, this puncture channel can be designed with a gradually decreasing channel space, meaning the puncture needle 4 first passes through a larger channel space and finally passes through a smaller channel space. This makes it easier for the puncture needle 4 to enter the channel, and the smaller channel space at the end helps ensure the alignment of the puncture needle 4, allowing the puncture needle 4 to more accurately puncture the corresponding position. The main body 1 has a space to accommodate the movable block 2'. The control component 8 can control the movable block 2' to slide out and retract from the main body 1. Specifically, the pull rope 61 and the puncture needle 4 pass through the control component 8 and are fixed to the top control block 5. There can be two pull ropes 61 symmetrically arranged, which is the same as the method described above where there are two pull ropes 61 and two pull rope holes 52. The second control wire 63 can be stainless steel wire, nickel-titanium wire, etc. For the stability of the pull rope 61, it can be set as multi-strand wire. There can be one or more second wire holes 82. In order to make the movement of the control component 8 more stable, there are preferably two second wire holes 82, and correspondingly, a second control wire 63 is fixed at each second wire hole 82. In one embodiment, the elastic element 81 that is sleeved on the pull rope 61 between the top control block 5 and the control component 8 is a spring. This allows the top control block 5 to move closer to the main body 1 when the movable block 2' needs to be slid out of the main body 1. The movement of the top control block 5 moves the puncture needle 4. At the same time, due to the presence of the spring, the movement of the top control block 5 also pushes the control member 8 to move. The movement of the control member 8 then causes the movable block 2' to slide out of the main body 1. Then, it is determined whether to puncture the puncture needle 4 according to the needs. If the movable block 2' is to be retracted into the main body 1, the control rope 61 is pulled in the opposite direction.

[0069] In one or more embodiments, please refer to Figures 20 to 22 The movable block 2' has a third wire hole 24 for placing the second control wire 63. The third wire hole 24 includes a first segment 241, a second segment 242, and a third segment 243. The second segment 242 is located between the first segment 241 and the third segment 243. The diameter of the hole in the first segment 241 is equal to the diameter of the hole in the third segment 243, and the diameter of the hole in the second segment 242 is smaller than the diameter of the hole in the first segment 241. In order to allow the movable block 2' to slide smoothly out of or retract into the main body 1, the other end of the second control wire 63 is fixed inside the movable block 2'. The fixing method can be that the second control wire 63 is placed in the third wire hole 24 of the movable block 2'. The three segments of the third wire hole 24 are not completely identical, with the second segment 242 having the smallest diameter. Two collars 631 can be welded to the second control wires 63 at positions adjacent to the second segment 242 on the first segment 241 and the third segment 243, respectively. The collars 631 can be made of stainless steel or nickel-titanium alloy. The outer diameter of the collars 631 is larger than the diameter of the hole in the second segment 242 of the third wire hole 24, but smaller than the diameter of the hole in the first segment 241 of the third wire hole 24. The collars 631 are welded to the moving block 2', thus ensuring that the second control wire 63 is firmly fixed to the moving block 2' and will not easily fall off. At the same time, the sliding of the moving block 2' can be controlled by the second control wire 63.

[0070] In one or more embodiments, please refer to Figures 23 to 28 The upper clamping arm 2 includes a sleeve, which can also be understood as the upper clamping arm 2 being the sleeve. A spring plate 41 protrudes from the outer periphery of the end of the puncture needle 4. A fourth wire hole 54 for fixing the third control wire 64 is provided on the top control block 5. One end of the third control wire 64 is fixed inside the fourth wire hole 54, and the other end is fixedly connected to the sleeve. The spring plate 41 can push the sleeve out of the main body 1, allowing the puncture needle 4 to continue extending from the sleeve to puncture the annular tissue. When retracting after puncture, the sleeve can also be brought back into the main body 1. The top control block 5 also has a fourth wire hole 54, in which the third control wire 64 is fixed. One end of the third control wire 64 is fixed inside the fourth wire hole 54, and the other end is fixed to the sleeve, thus enabling convenient control of the sleeve's movement.

[0071] In one or more embodiments, please refer to Figure 27 and Figure 28The device has three sleeves: a first sleeve 25, a second sleeve 26, and a third sleeve 27. The outer diameters of the first sleeve 25, the second sleeve 26, and the third sleeve 27 decrease sequentially. The second sleeve 26 can retract into the first sleeve 25, and the third sleeve 27 can retract into the second sleeve 26. The other end of the third control wire 64 is fixedly connected to the first sleeve 25. By setting multiple sleeves and setting the outer diameter of the last sleeve when the needle is withdrawn to be the smallest, a relatively stable restraining effect can be formed on the puncture needle 4 when puncturing the valve annulus tissue, improving puncture accuracy and reducing the risk of deviation.

[0072] In one or more embodiments, please refer to Figures 22 to 26 as well as Figure 28 The third sleeve 27 is provided with a first limiting structure 271, and the second sleeve 26 is provided with a second limiting structure 261. The second limiting structure 261 prevents the second sleeve 26 from detaching from the first sleeve 25 when it extends, and the first limiting structure 271 prevents the third sleeve 27 from detaching from the second sleeve 26 when it extends. That is, when the second sleeve 26 is fully extended, the second limiting structure 261 on the second sleeve 26 is blocked by the first sleeve 25, thus ensuring that the second sleeve 25 will not fall off when extended. Similarly, when the third sleeve 27 extends, its first limiting structure 271 is blocked by the second sleeve 26, thus ensuring that the third sleeve 27 will not fall off. The main process is as follows: When the puncture needle 4 is activated, pulling the pull rope 61 controls the movement of the top control block 5, which in turn moves the puncture needle 4. The spring piece 41 on the puncture needle 4 pushes the third sleeve 27 forward. When the third sleeve 27 reaches the corresponding position, pushing the puncture needle 4 forward further causes the second sleeve 26 to extend from the first sleeve 25, thus extending all three sleeves 27. When it is necessary to puncture the valve annulus tissue, the puncture needle 4 is driven to puncture, and the spring piece 41 slides out of the third sleeve 27 along with part of the puncture needle 4. After the puncture is completed, when the puncture needle 4 is retrieved, the spring piece 41 on the puncture needle 4 pushes the third sleeve 27 to retract the second sleeve 26 one by one into the first sleeve 25. At the same time, as the puncture needle 4 is retrieved, the spring piece 41 can be bounced into the third sleeve 27. Then, by controlling the top control block 5, the third control wire 64 is moved. The other end of the third control wire 64 is fixedly connected to the first sleeve 25, so the first sleeve 25 can also be retracted into the main body 1 through the third control wire 64. The spring piece 41 can be snowflake-shaped or the like, and there is no strict limitation on the shape of the spring piece 41, as long as it can realize the pushing and retraction of the three different sleeve sections.

[0073] In one or more embodiments, please refer to Figure 8The top control block 5 has a guide 9 on its outer cover. This guide 9 serves a guiding function, directing the valve annulus retractor device as it enters the body, making it easier for the device to reach the designated position. It also protects the heart tissue from damage. Furthermore, the guide 9 protects the structures on the top control block 5 from exposure, ensuring their precise fit and preventing them from scratching the heart tissue.

[0074] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A valve annulus contraction device, characterized in that, include: The main body has a distal end and a proximal end; The upper clamping arm is located at the distal end near the main body; The lower clamping arm is located near the proximal end of the main body and is used to support the valve annulus tissue. A puncture needle is disposed within the main body and the upper clamping arm, and the puncture needle can pass through the main body and the upper clamping arm to puncture the valve annulus tissue; A top control block is located at the distal end of the main body. The top control block is used to control the puncture needle to pass through the upper clamping arm or to retract the puncture needle into the main body and the upper clamping arm. The top control block has a through-hole for puncture and a pull rope hole. The puncture hole is used to install the puncture needle, and one end of the puncture needle is fixedly connected to the puncture hole. The pull rope hole is used to fix the pull rope. A pull rope channel is provided in the main body for the pull rope to pass through. The pull rope is used to control the movement of the top control block. The main body and the top control block have coaxial track holes. A track is installed in the track holes, and the top control block can move back and forth along the track.

2. The annular shrinkage device as described in claim 1, characterized in that, The upper clamping arm has a through-hole for the puncture needle to pass through. The upper clamping arm has a connecting end connected to the main body and a free end opposite to the connecting end. The connecting end of the upper clamping arm is rotatably connected to the main body.

3. The annular shrinkage device as described in claim 2, characterized in that, The connecting end of the upper clamping arm has a first surface and a second surface that contacts the first surface. A control groove is formed on the first surface, and a first wire hole for the first control wire to pass through is formed on the second surface. A fixing sleeve is fixedly connected to one end of the first control wire. The diameter of the fixing sleeve is larger than the diameter of the first wire hole, so as to lock the fixing sleeve in the control groove.

4. The annular shrinkage device as described in claim 1, characterized in that, The upper clamping arm is a movable block that can slide out from the main body. A control component for controlling the movement of the movable block is provided between the top control block and the main body. The control component has a through hole for the puncture needle to pass through and a through hole for the pull rope to pass through. An elastic element is provided over the pull rope between the top control block and the control component. A second wire hole for fixing the second control wire is provided on the control component. One end of the second control wire is fixed in the second wire hole, and the other end of the second control wire is fixed in the movable block.

5. The annular shrinkage device as described in claim 4, characterized in that, The movable block has a third wire hole for placing the second control wire. The third wire hole includes a first segment, a second segment, and a third segment. The second segment is located between the first segment and the third segment. The diameter of the first segment is equal to the diameter of the third segment, and the diameter of the second segment is smaller than the diameter of the first segment.

6. The annular shrinkage device as described in claim 1, characterized in that, The upper clamping arm includes a sleeve, and the outer periphery of the end of the puncture needle is provided with spring pieces at intervals. The top control block is provided with a fourth wire hole for fixing the third control wire. One end of the third control wire is fixed in the fourth wire hole, and the other end of the third control wire is fixedly connected to the sleeve.

7. The annular shrinkage device as described in claim 6, characterized in that, The sleeve is provided in three sections: a first sleeve, a second sleeve, and a third sleeve. The outer diameters of the first sleeve, the second sleeve, and the third sleeve decrease sequentially. The second sleeve can retract into the first sleeve, and the third sleeve can retract into the second sleeve. The other end of the third control wire is fixedly connected to the first sleeve.

8. The annular shrinkage device as described in claim 7, characterized in that, The third sleeve is provided with a first limiting structure, and the second sleeve is provided with a second limiting structure. The second limiting structure prevents the second sleeve from detaching from the first sleeve when it extends, and the first limiting structure prevents the third sleeve from detaching from the second sleeve when it extends.

9. The annular shrinkage device as described in claim 1, characterized in that, The top control block cover is equipped with a guide.

Images