Valve ring contraction device

Abstract

The invention discloses a valve ring contraction device. The valve ring contraction device comprises a main body, an upper clamping arm, a lower clamping arm, a puncture needle and a top control block, the main body is provided with a far end and a near end, the upper clamping arm is arranged close to the far end of the main body, the lower clamping arm is arranged close to the near end of the main body, the lower clamping arm is used for bearing valve ring tissue, and the puncture needle is arranged in the main body and the upper clamping arm. The puncture needle can penetrate out of the main body and the upper clamping arm to puncture valve ring tissue, and the top control block is arranged at the far end of the main body and used for controlling the puncture needle to penetrate out of the upper clamping arm or retracting the puncture needle into the main body and the upper clamping arm. According to the technical scheme, the puncture success rate can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a valve ring contraction device. Background Art

[0002] The mitral valve (also called 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 unimpeded flow of blood 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 valve structure, but also on the adjacent myocardium.

[0003] In some patients, whether due to genetic abnormalities, disease or injury, the mitral valve does not close properly, resulting in a condition called regurgitation, in which blood is pumped into the atria every time the heart muscle contracts. Regurgitation is a serious, often rapidly worsening condition that reduces circulatory efficiency and must be corrected. Common treatments include surgery or minimally invasive surgery. Surgery requires an opening in the patient's chest to access the heart, and the surgery is performed with the assistance of an external circulation device. It is usually performed with a ring around the mitral valve and sutured, or a mechanical valve replaces the mitral valve, but this surgical method is often risky. Minimally invasive interventional surgery uses a small opening in the body's vascular access or at the apex of the heart to deliver the device to the specified location through a catheter, or the device is directly inserted into the specified location. There are many ways to treat mitral regurgitation, including surgery on the mitral valve ring to achieve ring contraction to treat mitral regurgitation. There are two types of ring contraction: direct ring contraction and indirect ring contraction. Indirect ring contraction uses the vascular tissue around the mitral valve to contract the mitral valve ring so that the mitral valve leaflets can close tightly. Direct annular contraction can be divided into direct shrinkage of the valve annulus by a direct molding ring, and tightening of part of the valve annulus to achieve a reduction in the mitral valve annulus and close the mitral valve leaflets tightly.

[0004] In the existing method of directly shrinking the annulus to reduce the mitral valve annulus, after the lower clamp arm of the annulus shrinkage device supports the annulus, the annulus is directly punctured with a puncture needle. However, the annular tissue is a relatively tough tissue, and the puncture needle does not have enough puncture force during puncture, making it difficult to puncture successfully, and the puncture needle may bend.

[0005] The above contents are only used to assist in understanding the technical solution of the present application and do not constitute an admission that the above contents are prior art. Summary of the invention

[0006] The present application provides a valve ring shrinking device to solve the technical problem of low puncture success rate in valve ring shrinking devices.

[0007] A technical solution of the present application provides a valve ring contraction device, including a main body, an upper clamp arm, a lower clamp arm, a puncture needle and a top control block, the main body having a distal end and a proximal end, the upper clamp arm being arranged near the distal end of the main body, the lower clamp arm being arranged near the proximal end of the main body, the lower clamp arm being used to support the valve ring tissue, the puncture needle being arranged in the main body and the upper clamp arm, the puncture needle being able to pass through the main body and the upper clamp arm to puncture the valve ring tissue, the top control block being arranged at the distal end of the main body, the top control block being used to control the puncture needle to pass through the upper clamp arm or to retract the puncture needle into the main body and the upper clamp arm.

[0008] In a possible embodiment, the top control block is penetrated by a puncture hole and a pull rope hole, the puncture hole is used to install the puncture needle, 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 for the pull rope to pass through is opened in the main body, the pull rope is used to control the movement of the top control block, and coaxial track holes are opened on the main body and the top control block, a track is installed in the track hole, and the top control block can reciprocate along the track.

[0009] In a possible embodiment, the upper clamp arm is penetrated by a puncture channel for the puncture needle to pass through, and the upper clamp 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 clamp arm is rotatably connected to the main body.

[0010] In a possible embodiment, the connecting end of the upper clamp arm has a first surface and a second surface connected to the first surface, a control groove is provided on the first surface, a first wire hole is provided on the second surface for a first control wire to pass through, and one end of the first control wire is fixedly connected to a fixing sleeve, and the diameter of the fixing sleeve is larger than the aperture of the first wire hole so that the fixing sleeve can be clamped in the control groove.

[0011] In a possible embodiment, the upper clamping arm is a moving block, and the moving block can slide out of the main body. A control member for controlling the movement of the moving block is provided between the top control block and the main body. The control member is provided with a through hole for the puncture needle to pass through and a through hole for the pull rope to pass through. An elastic member is provided on the pull rope sleeve between the top control block and the control member. A second wire hole for fixing a second control wire is provided on the control member, 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 moving block.

[0012] In a possible embodiment, a third wire hole for placing the second control wire is opened in the moving block, and the third wire hole includes a first section, a second section and a third section, the second section is located between the first section and the third section, the aperture of the first section is equal to the aperture of the third section, and the aperture of the second section is smaller than the aperture of the first section.

[0013] In a possible embodiment, the upper clamp arm includes a sleeve, and spring plates are protruded at intervals on the outer periphery of the end portion of the puncture needle. A fourth wire hole for fixing a third control wire is opened on the top control block, 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 a possible embodiment, there are three sleeves, namely 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 successively, the second section sleeve can be retracted into the first section sleeve, the third section sleeve can be retracted into the second section sleeve, and the other end of the third control wire is fixedly connected to the first section sleeve.

[0015] In a possible embodiment, the third section sleeve is provided with a first limiting structure, and the second section sleeve is provided with a second limiting structure, the second limiting structure prevents the second section sleeve from being separated from the first section sleeve when being extended, and the first limiting structure prevents the third section sleeve from being separated from the second section sleeve when being extended.

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

[0017] In the technical solution proposed by the present invention, the annular ring shrinking device is provided to include a main body, an upper clamp arm, a lower clamp arm, a puncture needle and a top control block, the main body has a distal end and a proximal end, the upper clamp arm is provided at the distal end close to the main body, the lower clamp arm is provided at the proximal end close to the main body, the lower clamp arm is used to support the annular tissue, the puncture needle is provided in the main body and the upper clamp arm, the puncture needle can pass through the main body and the upper clamp arm to puncture the annular tissue, the top control block is provided at the distal end of the main body, and the top control block is used to control the puncture needle to pass through the upper clamp arm or to recycle the puncture needle into the main body and the upper clamp arm. By providing the upper clamp arm and the lower clamp arm on the annular ring shrinking device, when puncturing the annular tissue, the lower clamp arm supports the annular tissue, because the upper clamp arm has a certain length, the puncture needle punctures the annular tissue after passing through the upper clamp arm, thereby having a certain limiting effect on the puncture needle, thereby improving the puncture accuracy and puncture success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 The schematic diagram shows the structure of the upper clamping arm and the lower clamping arm of the first embodiment of the valve ring shrinking device of the present invention when they are not opened;

[0020] Figure 2 The schematic diagram shows the structure of the first embodiment of the valve ring shrinking device of the present invention, in which the upper clamping arm and the lower clamping arm are both opened;

[0021] Figure 3 The structure diagram of the upper clamp arm in the first embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure from another perspective;

[0023] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 6 A schematic diagram of a part of the structure of the valve ring shrinking device in the first embodiment of the present invention with the upper clamp arm opened is shown;

[0025] Figure 7 A schematic diagram of the structure of the puncture needle having punctured the valve ring in the first embodiment of the valve ring contraction device of the present invention is shown;

[0026] Figure 8 The structure diagram of the guide member included in the first embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0027] Fig. 9 The cross-sectional structure diagram of the valve ring contraction device in the first embodiment of the present invention when the upper clamping arm and the lower clamping arm are both opened is schematically shown;

[0028] Fig.10 The structure diagram of the lower clamping arm in the first embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0029] Fig.11 The schematic diagram shows the structure of the mesh structure of the lower clamping arm in the first embodiment of the valve ring shrinking device of the present invention;

[0030] Fig.12The schematic diagram shows the structure of the lower clamping arm of the first embodiment of the valve ring shrinking device of the present invention being opened;

[0031] Fig.13 The schematic diagram of the structure of the top control block in the first embodiment of the valve ring shrinking device of the present invention is shown;

[0032] Fig.14 The structure diagram of the second embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0033] Fig.15 for Fig.14 A structural diagram from another perspective;

[0034] Fig.16 A schematic structural diagram of the second embodiment of the valve ring shrinking device of the present invention from another viewing angle is shown schematically;

[0035] Fig.17 The cross-sectional structure diagram of the second embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0036] Fig.18 A schematic diagram of the structure of the puncture needle having punctured the valve ring in the second embodiment of the valve ring contraction device of the present invention is shown;

[0037] Fig.19 The schematic diagram of the structure of the top control block in the second embodiment of the valve ring shrinking device of the present invention is shown;

[0038] Fig. 20 The structure diagram of the moving block in the second embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0039] Fig.21 The schematic diagram shows the structure of the third thread hole of the moving block in the second embodiment of the valve ring shrinking device of the present invention;

[0040] Fig. 22 Schematically shows Fig.21 A schematic diagram of the structure after the second control wire is fixed in the third wire hole;

[0041] Fig.23 The structure diagram of the puncture needle in the third embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0042] Fig.24 The structure diagram of the third embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0043] Fig.25 A schematic diagram of the structure of the puncture needle having punctured the valve ring in the third embodiment of the valve ring contraction device of the present invention is shown;

[0044] Fig.26 The cross-sectional structure diagram of the third embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0045] Fig. 27 The structure diagram of the sleeve in the third embodiment of the valve ring shrinking device of the present invention is schematically shown;

[0046] Fig.28 The cross-sectional structure diagram of the sleeve in the third embodiment of the valve ring shrinking device of the present invention is schematically shown.

[0047] Description of the accompanying drawings: 1-main body, 2-upper clamp arm, 2'-moving block, 21-puncture 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 section, 242-second section, 243-third section, 25-first section sleeve, 26-second section sleeve, 261-second limiting mechanism, 27-third section sleeve, 271-first limiting structure, 28 -axis hole, 3-lower clamping arm, 31-rotating axis, 32-control line, 33-mesh structure, 4-puncture needle, 41-spring sheet, 42-threaded segment, 5-top control block, 51-puncture hole, 52-pull rope hole, 53-track hole, 54-fourth wire hole, 61-pull rope, 62-first control wire, 621-fixing sleeve, 63-second control wire, 631-ring, 64-third control wire, 7-track, 8-control member, 81-elastic member, 82-second wire hole, 9-guide member. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 position relationship, movement status, etc. between various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] It should be noted that "distal" and "proximal" are used as directional terms, which are commonly used terms in the field of medical devices, where "distal" refers to the end away from the operator during surgery, and "proximal" refers to the end close to the operator during surgery. Axial refers to the direction parallel to the line connecting the distal center and the proximal center of the medical device; radial refers to the direction perpendicular to the above axial direction.

[0054] See also Figures 1 to 13 The present invention proposes a valve ring shrinkage device, which includes a main body 1, an upper clamp arm 2, a lower clamp 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 clamp arm 2 is arranged at the distal end close to the main body 1, and the lower clamp arm 3 is arranged at the proximal end close to the main body 1. The lower clamp arm 3 is used to support the valve ring tissue. The puncture needle 5 is in the main body 1 and the upper clamp arm 2. The puncture needle 4 can pass through the main body 1 and the upper clamp arm 2 to puncture the valve ring tissue. The top control block 5 is arranged 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 clamp arm 2 or to retract the puncture needle 4 into the main body 1 and the upper clamp 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 clamp arm 3 can be rotatably connected to the main body 1 through a rotating shaft 31, and then a control line 32 can be welded on the lower clamp arm 3. The welding method can be that a hole is opened on the lower clamp arm 3, and the control line 32 is inserted into the hole and welded to the lower clamp arm 3. The control line 32 can be a stainless steel wire, a nickel titanium wire, etc. In order to stabilize the control line 32, it can be set as a multi-strand wire. In this way, the relative rotation of the lower clamp arm 3 and the main body 1 can be controlled by pulling the control line 32 to achieve the opening and closing of the lower clamp arm 3. The valve ring shrinking device can also include a handle (not shown in the figure), and a component that can pull the control line 32 can be set in the handle. In order to save space and to arrange the components more compactly, the main body 1 can preferably be set to be roughly cylindrical. The distal end of the main body 1 is the end away from the operator during the operation, and the proximal end of the main body 1 is the end closer to the operator during the operation relative to the distal end.

[0056] See also Figures 1 to 7 , the upper clamp arm 2 can also be opened or closed from the main body 1. When the lower clamp arm 3 successfully supports the valve ring tissue, the upper clamp arm 2 can be opened, and then the top control block 5 is used to control the puncture needle 4 to pass through the upper clamp arm 2, and then puncture the valve ring tissue. Because the upper clamp arm 2 has a certain length, the puncture needle 4 also has a certain length in the upper clamp arm 2. When puncturing, the puncture needle 4 is not completely set outside the main body 1, but is retained in a part of the upper clamp arm 2. Because the valve ring tissue is a tougher tissue, if the puncture needle 4 is directly passed through the main body 1 and then punctured, it is easy to have insufficient puncture force and difficult to puncture successfully, and the puncture needle 4 is easy to bend. By setting the upper clamp arm 2 and the lower clamp arm 3 to cooperate with each other, the upper clamp arm 2 has a certain length, and the puncture needle 4 passes through the upper clamp arm 2 before puncturing. The upper clamp arm 2 has a certain limited support effect on the puncture needle 4, avoiding the situation where the puncture needle 4 is difficult to puncture successfully due to direct puncture by the puncture needle 4, and the puncture needle 4 is prone to bending.

[0057] In one or more embodiments, please combine Figure 1 , Figure 2 , Figure 7 , Figure 8 and Fig.13The top control block 5 is provided with a puncture hole 51 and a drawstring hole 52. The puncture hole 51 is used to install the puncture needle 4. One end of the puncture needle 4 is fixedly connected to the puncture hole 51. The drawstring hole 52 is used to fix the drawstring 61. A drawstring channel for the drawstring 61 is provided in the main body 1. The drawstring 61 is used to control the movement of the top control block 5. A coaxial track hole 53 is provided on the main body 1 and the top control block 5. A track 7 is installed in the track hole 53. 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 a cylindrical shape. One end of the puncture needle 4 can be fixedly connected to the puncture hole 51 by welding, so that their relative positions are fixed, so that when the top control block 5 slides, the puncture needle 4 is driven to slide together at the same time. The moving direction of the top control block 5 is in the axial direction of the main body 1. By opening a coaxial track hole 53 on the main body 1 and the top control block 5, a track 7 is installed in the track hole 53, that is, the track 7 passes through the main body 1 and the top control block 5 at the same time, the proximal end of the track 7 can be welded to the main body 1, and the top control block 5 can move back and forth on the track 7 at the distal end of the track 7. In order to prevent the top control block 5 and the puncture needle 4 from moving out of position, the cross-sectional shape of the track 7 can be polygonal, elliptical, etc., as long as it is not circular, as long as it is ensured that the top control block 5 will not rotate relative to the track 7, and the top control block 5 can only move relative to the track 7. A pull rope hole 52 is also passed through the top control block 5, and a pull rope 61 is fixed in the pull rope hole 52. The fixing method can be welding or other fixing methods, as long as one end of the pull rope 61 can be fixed in the pull rope hole 52. Among them, the pull rope 61 can be stainless steel wire, nickel titanium wire, etc., and in order to stabilize the pull rope, it can be set as a multi-strand wire. In this way, the top control block 5 can be controlled to move along the track 7 by pulling the pull rope 61, and the top control block 5 moves to drive the puncture needle 4 to move. The puncture needle 4 moves to penetrate from the main body 1 and the upper clamp arm 2 to realize the needle-out action and then puncture the valve ring tissue. The puncture needle 4 can be made of stainless steel. The puncture needle 4 is a stainless steel hollow tube with a threaded section. The threaded section can increase the flexibility of the puncture needle 4 when bending. The needle tip can be designed as a triangular tip to make the puncture needle 4 sharper. The valve ring is a tissue with a certain toughness. Such a setting can make it easier for the puncture needle 4 to puncture the valve ring tissue. The specific method of pulling the pull rope 61 can be that a component that can pull the pull rope 61 is provided in the handle of the valve ring shrinking device. The pull rope hole can be set to one or more. In order to make the process of pulling the top control block 5 more stable, preferably, there are two pull rope holes 52, and the corresponding pull rope 61 is provided with two, and the positions of the two pull rope holes 52 are symmetrically arranged relative to the connection line of the puncture hole 51 and the track hole 53.

[0058] Among them, Figure 1 and Figure 4As shown in FIG. 1 , it is a schematic diagram of the structure in which the puncture needle 4 is still inside the upper clamp arm 2 and the main body 1 and has not been removed from the needle. Figure 7 , which is a schematic diagram of the state where the puncture needle 4 has been removed, that is, the top control block 5 has moved a distance from the distal end of the main body 1 to the proximal end of the main body 1 .

[0059] In one or more embodiments, see Figures 3 to 6 as well as Fig. 9 The upper clamp arm 2 is provided with a puncture channel 21 for the puncture needle 4 to pass through, and the upper clamp arm 2 has a connection end 22 connected to the main body 1 and a free end 23 opposite to the connection end 22. The connection end 22 of the upper clamp arm 2 is rotatably connected to the main body 1. Figure 3 As shown, the upper clamp arm 2 is a rectangular parallelepiped, and its connecting end 22 is rotatably connected to the main body 1. The connecting end 22 of the upper clamp arm 2 can be designed to be an irregular shape. The connecting end 22 of the upper clamp arm 2 can be rotatably connected to the main body 1 through a rotating shaft, that is, an axial hole 28 for the rotating shaft to pass through is opened on the connecting end 22 of the upper clamp arm 2, and the rotating shaft is fixedly connected to the main body 1, so that the upper clamp arm 2 can be rotated around the rotating shaft to realize the opening and closing of the upper clamp arm 2. The opening of the upper clamp arm 2 means that the upper clamp arm 2 and the main body 1 have a certain angle, and the closing of the upper clamp arm 2 means that the upper clamp arm 2 is attached to the main body 1. By setting the upper clamp arm 2, when the puncture needle 4 is removed, the puncture needle 4 is partially limited in the upper clamp arm 2, which protects and limits the puncture needle 4, reduces the suspended length of the puncture needle 4 when it is removed, and thus avoids the bending of the puncture needle 4 during puncture, and increases the puncture force of the puncture needle 4, so that the more resilient valve ring tissue can be successfully punctured.

[0060] In one or more embodiments, please continue to refer to Figures 3 to 6The connecting end 22 of the upper clamp arm 2 has a first surface 221 and a second surface 222 adjacent to the first surface 221. A control groove 221a is provided on the first surface 221, and a first wire hole 222a for the first control wire 62 to pass through is provided on the second surface 222. One end of the first control wire 62 is fixedly connected with a fixing sleeve 621, and the diameter of the fixing sleeve 621 is larger than the aperture of the first wire hole 222a, so that the fixing sleeve 621 is clamped in the control groove 221a. The material of the first control wire 62 can be stainless steel wire or nickel-titanium wire. In order to improve the stability, the first control wire 62 can also be set to multiple strands. One end of the first control wire 62 can be fixedly connected to the fixing sleeve 621 by welding. In order 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. The stability of the two parts with the same material after welding is stronger. Because the fixing sleeve 621 is stuck in the control groove 221a, the upper clamp arm 2 can be driven to open or close by pulling the first control wire 62. Because the material of the first control wire 62 is different from that of the main body 1, when the materials of the two are different, if the first control wire 62 is directly welded to the main body 1, the welding may be unstable due to the difference in materials. Therefore, by setting the materials of the first control wire 62 and the fixing sleeve 621 to be the same, and by clamping the fixing sleeve 621 in the control groove 221a, the first control wire 62 does not need to be directly welded to the main body 1, and the first control wire 62 can be pulled to drive the upper clamping arm 2 to open or close.

[0061] The puncture needle 4 has a slot for assembling a limiting anchor, and the anchor is installed on the slot. Fig.11 A mesh structure 33 is provided on the lower clamp arm 3. The mesh structure 33 can be a PET mesh film. The PET mesh film has a certain degree of softness and a denser mesh. The function of the mesh structure 33 is that the anchor can be stuck on the mesh structure 33 after the puncture needle 4 punctures and will not fall off.

[0062] The general operation steps of the valve ring shrinking device are:

[0063] 1. After the lower clamp arm 3 supports the valve ring tissue, open the upper clamp arm 2;

[0064] 2. After the upper clamp arm 2 is opened to a predetermined position, the needle is removed for puncture, and the puncture needle 4 punctures the annular tissue and the mesh structure on the lower clamp arm 3, and then the anchor on the puncture needle 4 is hooked on the mesh structure on the lower clamp arm 3;

[0065] 3. The puncture needle 4 is retracted, and the anchor and the suture thread on the anchor are hooked together on 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 ring tissue, and then close the lower clamp arm 3 to sew the suture thread on the valve ring tissue.

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

[0068] In one or more embodiments, see Figures 14 to 22 The upper clamp arm is a moving block 2', which can slide out from the main body 1. A control member 8 for controlling the movement of the moving block 2' is provided between the top control block 5 and the main body 1. The control member 8 is provided with a through hole for the puncture needle 4 to pass through and a through hole for the pull rope 61 to pass through. The pull rope 61 between the top control block 5 and the control member 8 is covered with an elastic member 81. The control member 8 is provided with a second wire hole 82 for fixing the second control wire 63. One end of the second control wire 63 is fixed in the second wire hole 82, and the other end of the second control wire 63 is fixed in the moving block 2'. The upper clamp arm is the moving block 2', that is, the moving block 2' also has a puncture channel through which the puncture needle 4 passes. The puncture channel can preferably be set in a way that the channel space gradually becomes smaller, that is, the channel space that the puncture needle 4 passes through first is larger, and the channel that the puncture needle 4 passes through last is smaller, so that it is easier for the puncture needle 4 to enter the channel. The smaller channel when the needle is finally removed is conducive to ensuring the alignment of the puncture needle 4, so that the puncture needle 4 can puncture the corresponding position more accurately. A space for accommodating the moving block 2' is provided in the main body 1, and the control member 8 can control the moving block 2' to slide out and be retracted from the main body 1. The specific control method is that the pull rope 61 and the puncture needle 4 are fixed on the top control block 5 after passing through the control member 8, and the pull rope 61 can be symmetrically provided with two, which is the same as the method of providing two pull ropes 61 and pull rope holes 52 described above. The second control wire 63 can be a stainless steel wire, a nickel-titanium wire, etc., and it can be set as a multi-strand wire for the stability of the pull rope 61. One or more second wire holes 82 can be provided, and in order to make the movement of the control member 8 more stable, preferably, two second wire holes 82 are provided, and accordingly, a second control wire 63 is fixed at each second wire hole 82. The elastic member 81 provided on the outer surface of the pull rope 61 between the top control block 5 and the control member 8 is a spring in one embodiment. In this way, when the moving block 2' is to be slid out of the main body 1, the top control block 5 can be moved toward the direction close to the main body 1 by controlling the pulling rope 61. The movement of the top control block 5 drives the puncture needle 4 to move. At the same time, due to the presence of the spring, the top control block 5 also pushes the control member 8 to move while moving. The movement of the control member 8 drives the moving block 2' to slide out of the main body 1, and then it is determined whether to pierce the puncture needle 4 according to needs. If the moving block 2' is retracted into the main body 1, the control rope 61 can be pulled in the opposite direction.

[0069] In one or more embodiments, see Figure 20 to Figure 22 , a third wire hole 24 for placing the second control wire 63 is provided in the moving block 2', the third wire hole 24 includes a first section 241, a second section 242 and a third section 243, the second section 242 is located between the first section 241 and the third section 243, the aperture of the first section 241 is equal to the aperture of the third section 243, and the aperture of the second section 242 is smaller than the aperture of the first section 241. In order to enable the moving block 2' to smoothly slide out of the main body 1 or be retracted into the main body 1, the other end of the second control wire 63 is fixed in the moving block 2'. The fixing method can be that the second control wire 63 is placed in the third wire hole 24 of the moving block 2', the three sections of the third wire hole 24 are not exactly the same, and the aperture of the second section 242 is the smallest. Two ferrules 631 can be welded on the corresponding second control wire 63 at the positions near the second section 242 on the first section 241 and the third section 243. The material of the ferrule 631 can be stainless steel or nickel-titanium alloy. The outer diameter of the ferrule 631 is larger than the aperture of the second section 242 of the third wire hole 24, but the outer diameter of the ferrule 631 is smaller than the aperture of the first section 241 of the third wire hole 24. The ferrule 631 is welded to the moving block 2' in the same way, so that the second control wire 63 is firmly fixed on the moving block 2' and will not fall off from the moving block 2' easily. 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, see Figure 23 to Figure 28 The upper clamp arm 2 includes a sleeve, which can also be understood as the upper clamp arm 2 being the sleeve. The outer periphery of the end of the puncture needle 4 is convexly provided with spring pieces 41 at intervals. The top control block 5 is provided with a fourth thread hole 54 for fixing the third control wire 64. One end of the third control wire 64 is fixed in the fourth thread hole 54, and the other end of the third control wire 64 is fixedly connected to the sleeve. The spring piece 41 can push the sleeve out of the main body 1, and the puncture needle 4 continues to extend from the sleeve to puncture the valve ring tissue. When the sleeve is withdrawn after the puncture is completed, the sleeve can also be brought back to the main body 1. The top control block 5 is also provided with a fourth thread hole 54, in which the third control wire 64 is fixed, one end of the third control wire 64 is fixed in the fourth thread hole 54, and the other end of the third control wire 64 is fixed on the sleeve, so that the movement of the sleeve can be conveniently controlled.

[0071] In one or more embodiments, see Fig. 27 and Fig.28There are three sleeves, namely the first sleeve 25, the second sleeve 26 and the third sleeve 27. The outer diameters of the first sleeve 25, the second sleeve 26 and the third sleeve 27 are reduced in sequence. The second sleeve 26 can be retracted into the first sleeve 25, and the third sleeve 27 can be retracted into the second sleeve 26. The other end of the third control wire 64 is fixedly connected to the first sleeve 25. By providing multiple layers of sleeves and setting the outer diameter of the sleeve at the last needle exit to the smallest, when the puncture needle 4 punctures the valve ring tissue, a relatively stable limiting effect can be formed on the puncture needle 4, thereby improving the puncture accuracy and preventing deviation.

[0072] In one or more embodiments, see Figure 22 to Figure 26 as well as Fig.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 being separated from the first sleeve 25 when it is extended, and the first limiting structure 271 prevents the third sleeve 27 from being separated from the second sleeve 26 when it is extended. That is, when the second sleeve 26 is fully extended, the second limiting structure 261 on the second sleeve 26 will be blocked by the first sleeve 25, thereby ensuring that the second sleeve 25 will not fall off when it is extended. Similarly, when the third sleeve 27 is extended, the first limiting structure 271 on it will be blocked by the second sleeve 26, thereby ensuring that the third sleeve 27 will not fall off. The main process is that after starting the puncture needle 4, the top control block 5 can be controlled to move by pulling the pull rope 61, thereby driving the puncture needle 4 to move, and the spring piece 41 on the puncture needle 4 will push the third section sleeve 27 forward. When the third section sleeve 27 advances to the corresponding position, the puncture needle 4 is pushed forward again, which drives the second section sleeve 26 to extend from the first section sleeve 25, thereby making all three sections of the sleeve 27 extend. Then, when it is necessary to puncture the valve ring tissue, the puncture needle 4 will continue to be driven to puncture, and the spring piece 41 will slide out of the third section sleeve 27 along with part of the puncture needle 4. After the puncture is completed, when the puncture needle 4 is recovered, the spring piece 41 on the puncture needle 4 will push against the third section sleeve 27 to retract the second section sleeve 26 one by one into the first section sleeve 25, and at the same time continue to retract the puncture needle 4, so that the spring piece 41 can be ejected into the third section sleeve 27. Then, by controlling the top control block 5, the third control wire 64 is driven to move, and the other end of the third control wire 64 is fixedly connected to the first sleeve 25, and the first sleeve 25 can be retracted into the main body 1 through the third control wire 64. The spring piece 41 can be in a snowflake shape, etc., and there is no strict limitation on the shape of the spring piece 41, as long as it can push and retract the three different sleeves.

[0073] In one or more embodiments, see Figure 8The outer cover of the top control block 5 is provided with a guide member 9. The guide member 9 can play a guiding role, guiding the valve ring shrinking device when it enters the body so that the valve ring shrinking device can reach the designated position more easily, and can also protect the tissue in the heart from being damaged. In addition, the guide member 9 can also protect the structure on the top control block 5 from being exposed, which will not affect its precise matching, and can also prevent the structure on the top control block 5 from scratching the heart tissue.

[0074] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A valve ring shrinking device, characterized in that: include: a body having a distal end and a proximal end; An upper clamping arm, disposed near the distal end of the main body; A lower clamp arm, disposed near the proximal end of the main body, and used for supporting the valve ring tissue; A puncture needle is disposed in the main body and the upper clamp arm, and the puncture needle can pass through the main body and the upper clamp arm to puncture the valve ring tissue; A top control block is arranged at the distal end of the main body, and is used to control the puncture needle to pass out from the upper clamp arm or to retract the puncture needle into the main body and the upper clamp arm.

2. The valve ring shrinking device according to claim 1, characterized in that: The top control block is penetrated by a puncture hole and a pull rope hole, the puncture hole is used to install the puncture needle, 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 for the pull rope to pass through is opened in the main body, the pull rope is used to control the movement of the top control block, the main body and the top control block are provided with coaxial track holes, a track is installed in the track hole, and the top control block can reciprocate along the track.

3. The valve ring shrinking device according to claim 2, characterized in that: The upper clamp arm is penetrated by a puncture channel for the puncture needle to pass through, and the upper clamp 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 clamp arm is rotatably connected to the main body.

4. The valve ring shrinking device according to claim 3, characterized in that: The connecting end of the upper clamp arm has a first surface and a second surface connected to the first surface, a control groove is provided on the first surface, a first wire hole for a first control wire to pass through is provided on the second surface, one end of the first control wire is fixedly connected to a fixing sleeve, and the diameter of the fixing sleeve is larger than the aperture of the first wire hole so that the fixing sleeve can be clamped in the control groove.

5. The valve ring shrinking device according to claim 2, characterized in that: The upper clamping arm is a moving block, and the moving block can slide out of the main body. A control member for controlling the movement of the moving block is provided between the top control block and the main body. The control member is provided with a through hole for the puncture needle to pass through and a through hole for the pull rope to pass through. An elastic member is provided on the pull rope outer sleeve between the top control block and the control member. A second wire hole for fixing a second control wire is provided on the control member. 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 moving block.

6. The valve ring shrinking device according to claim 5, characterized in that: A third wire hole for placing the second control wire is opened in the moving block, and the third wire hole includes a first section, a second section and a third section, the second section is located between the first section and the third section, the aperture of the first section is equal to the aperture of the third section, and the aperture of the second section is smaller than the aperture of the first section.

7. The valve ring shrinking device according to claim 2, characterized in that: The upper clamp arm includes a sleeve, and spring sheets are protruded at intervals on the outer periphery of the end portion of the puncture needle. A fourth wire hole for fixing a third control wire is opened on the top control block, 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.

8. The valve ring shrinking device according to claim 7, characterized in that: There are three sleeves, namely 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 successively. The second section sleeve can be retracted into the first section sleeve, and the third section sleeve can be retracted into the second section sleeve. The other end of the third control wire is fixedly connected to the first section sleeve.

9. The valve ring shrinking device according to claim 8, characterized in that: The third section sleeve is provided with a first limiting structure, and the second section sleeve is provided with a second limiting structure. The second limiting structure prevents the second section sleeve from being separated from the first section sleeve when extended, and the first limiting structure prevents the third section sleeve from being separated from the second section sleeve when extended.

10. The valve ring shrinking device according to claim 1, characterized in that: The top control block outer cover is provided with a guide piece.

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