Valve clamping device, dissociation device and valve clamping system
By introducing a sliding connecting post and an adjusting component into the valve clamp, the problem of difficulty in adjusting the clamping gap and opening angle in the prior art is solved, realizing personalized adaptation and stable clamping of the valve clamp and reducing the risk of leaflet tearing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI NACHUAN DAFENG MEDICAL TECHNOLOGY CO LTD
- Filing Date
- 2026-01-30
- Publication Date
- 2026-04-28
AI Technical Summary
Existing valve clamps are difficult to adjust the gap and opening angle between clamping groups according to the patient's valve lesions, resulting in improper clamping and potentially causing problems such as leaflet tearing, ischemic necrosis, or clamp displacement.
A valve clamping device was designed, including a sliding connecting post and an adjustment assembly. The clamping space and opening angle of the clamping assembly can be adjusted by adjusting the relative displacement between the connecting post and the main sleeve, and precise adjustment can be achieved by combining it with a disengagement device.
This technology allows for adjustment of the clamping space based on the thickness of the patient's valve leaflets, reducing the risk of leaflet tearing and improving the stability and adaptability of the clamp, while also reducing adverse reactions during the clamping process.
Smart Images
Figure CN121926720A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a valve clamp, a release device, and a valve clamping system. Background Technology
[0002] Mitral valve regurgitation is a heart condition in which, during systole, the mitral valve between the left atrium and left ventricle fails to close completely, causing some blood from the left ventricle to flow back into the left atrium. The mitral valve consists of leaflets, annulus, chordae tendineae, and papillary muscles. Its core function is to ensure unidirectional blood flow from the left atrium to the left ventricle. Regurgitation indicates impairment of this unidirectional flow mechanism, leading to a series of hemodynamic abnormalities. Current valve clips are typically accessed via the femoral vein. The clip is delivered to the mitral valve via catheter and its clamping function precisely clamps the regurgitation areas of the anterior and posterior leaflets, creating a "double-hole" structure to reduce systolic blood regurgitation. This technique requires no open-chest surgery or cardiopulmonary bypass, offering advantages such as minimally invasive procedures and rapid recovery.
[0003] In related technologies, valve clamps generally include a first clamping assembly, a second clamping assembly, and a closing ring. The first clamping assembly and the second clamping assembly can form a clamping group, and the closing ring is used to tighten the clamping group outside the clamping group and reduce the opening and closing angle of the clamping group.
[0004] However, the valve clips in the relevant technology have the following drawbacks: First, the gap between the first and second clamping components is difficult to adjust. Second, after the closure ring clamps the assembly, the opening and closing angle between the clamping assemblies is difficult to adjust, making it impossible for the valve clip to adjust the opening and closing angle according to the patient's valve condition. Summary of the Invention
[0005] This application discloses a valve clip, a release device, and a valve clipping system, which facilitates adjustment of the clamping space of the clamping assembly and the opening and closing angle of the valve clip, thereby improving the fit between the valve clip and the patient.
[0006] To achieve the above objectives, this application provides the following technical solution: In a first aspect, this application provides a valve clamp, comprising: The first clamping assembly includes a connecting post and a plurality of first clamping arms. The plurality of first clamping arms are circumferentially spaced around the connecting post. Each first clamping arm is connected to the connecting post at an angle. The first clamping arms are elastic clamping arms. Under the action of elastic restoring force, the plurality of first clamping arms tend to move away from each other. The second clamping assembly includes a main sleeve and a plurality of second clamping arms. The plurality of second clamping arms are circumferentially spaced around the main sleeve. Each second clamping arm is hinged to the main sleeve. A connecting post is slidably inserted through the main sleeve along a first direction and engages with the main sleeve to prevent rotation. The plurality of second clamping arms correspond one-to-one with the plurality of first clamping arms. Each second clamping arm and a first clamping arm cooperate along the first direction to form a clamping assembly for clamping the valve. The adjustment assembly includes an adjustment structure and a linkage structure. The adjustment structure is located outside the main sleeve. The linkage structure includes multiple linkages, which are arranged one-to-one with multiple second clamping arms. Each linkage is hinged to the adjustment structure and the second clamping arm respectively. The adjustment structure is adjustablely positioned outside the main sleeve along a first direction. The first direction is parallel to the axial direction of the connecting column and the axial direction of the main sleeve.
[0007] In some embodiments, the adjusting assembly includes an inner sleeve and an outer sleeve; The inner sleeve is fitted around the outer circumference of the main sleeve and is threadedly connected to the main sleeve. The outer sleeve is rotatably fitted around the outer periphery of the inner sleeve in a first direction and is stop-fitted with the inner sleeve in the first direction. The connecting rod is hinged to the outer sleeve. In some embodiments, the inner hole of the inner sleeve includes a first hole segment, a second hole segment, and a third hole segment that are sequentially connected in the first direction. The first hole section is threadedly connected to the main sleeve; The diameter of the second section is smaller than that of the first section; The inner wall of the third hole section has an anti-rotation surface parallel to the first direction.
[0008] In some embodiments, an annular groove and an annular boss are provided between the inner sleeve and the outer sleeve. The annular boss can extend into the annular groove and can rotate within the annular groove about a first direction. One of the annular groove and the annular boss is provided in the inner sleeve, and the other is provided in the outer sleeve.
[0009] In some embodiments, the outer sleeve has a notch extending in a first direction at one end facing the first clamping assembly, and the first end of the connecting rod is hinged to the notch.
[0010] In some embodiments, a receiving groove is provided on the surface of the second clamping arm facing the first clamping arm, the receiving groove being used to receive the first clamping arm.
[0011] In some embodiments, the end of the first clamping arm away from the connecting post is provided with a protrusion, the protrusion protruding at least from the surface of the first clamping arm facing the second clamping arm.
[0012] Secondly, this application provides a disengagement device adapted to the valve clamps of the above embodiments, the disengagement device comprising: The first rod is used to pass through the main sleeve and be detachably connected to the connecting column; The second rod is used to be sleeved on the outside of the first rod and can slide or rotate relative to the first rod. The mating structure, located on the second rod, is used for detachable connection with the valve clamp. The mating structure can drive the adjustment structure to move along the first direction.
[0013] In some embodiments, the adjusting assembly includes an inner sleeve and an outer sleeve, the outer sleeve being rotatably fitted around the outer periphery of the inner sleeve about a first direction and engaging with the inner sleeve along the first direction, and the connecting rod being hinged to the outer sleeve. The inner hole of the inner sleeve includes a first hole section, a second hole section, and a third hole section that are connected sequentially along a first direction; the inner wall of the third hole section has an anti-rotation surface parallel to the first direction. The mating structure includes a plug portion disposed at one end of the second rod near the valve clamp. The plug portion has an anti-rotation mating surface, and the plug portion is used to extend into the third hole section to prevent rotational engagement between the anti-rotation mating surface and the anti-rotation mating surface. In some embodiments, the mating structure further includes a snap-fit assembly and a locking structure. The snap-fit assembly includes a base and a plurality of elastic arms disposed on the base. The base is fixedly connected to the outer periphery of the second rod, and the elastic arms are connected to the base at an angle. A locking engagement part is provided on the side of the elastic arm closest to the second rod. The locking structure is slidably connected to the second rod, and the second rod is fixedly connected to a driving part, which is used to drive the locking structure to slide along the second rod. The ends of multiple elastic arms furthest from the seat tend to move away from each other under the action of elastic restoring force. The locking structure is used to cooperate with the locking part to counteract the elastic restoring force of the elastic arms, so that the elastic arms can clamp the outer sleeve.
[0014] In some embodiments, the outer sleeve is provided with a slot, and the elastic arm includes a free end away from the seat, and a hook is provided at the free end; The locking sleeve can engage with the locking stop to counteract the elastic restoring force of the elastic arm, so that the hook can extend into the slot.
[0015] In some embodiments, the locking structure includes a locking sleeve and an elastic element, the locking sleeve being slidably fitted onto the second rod, and the elastic element being disposed between the locking sleeve and the seat. The driving part is located on the side of the locking sleeve away from the elastic element. The elastic element is used to make the locking sleeve abut against the driving part under the action of elastic restoring force. The locking sleeve is used to limit and lock the mating part.
[0016] In some embodiments, the locking sleeve includes a base plate and a side plate disposed on the outer periphery of the base plate; the locking engagement portion includes a limiting arm extending toward the locking sleeve, and the side plate extends between the limiting arm and the elastic arm to counteract the elastic restoring force of the elastic arm.
[0017] Thirdly, this application provides a valve clamping system, comprising: A valve clamp, wherein the valve clamp is any one of the valve clamps described in the above embodiments; The dissociation device is any one of the dissociation devices in the above embodiments.
[0018] The beneficial effects of this application are as follows: The connecting post of the first clamping assembly of this application is slidably inserted into the main sleeve along a first direction and engages with the main sleeve in a non-rotating manner. Relative movement of the connecting post and the main sleeve along the first direction can change the distance between the first and second clamping arms, thereby altering the size of the clamping space within a clamping group. When the patient's valve leaflets are thicker, the connecting post can be pushed to increase the clamping space within the clamping group. When the patient's valve leaflets are thinner, the connecting post can be pulled to decrease the clamping space within the clamping group, thus allowing the valve clamp to adjust the size of the clamping space according to the thickness of the patient's valve leaflets.
[0019] In addition, the adjustment assembly includes an adjustment structure and a linkage structure. The adjustment structure is adjustablely positioned outside the main sleeve along a first direction. The linkage structure includes multiple links corresponding to multiple second clamping arms. The first end of each link is hinged to the adjustment structure, and the second end is hinged to a second clamping arm. The second clamping arm is also hinged to the main sleeve via a first hinge shaft. The opening and closing angle of the clamping assembly can be adjusted by adjusting the position of the adjustment assembly in the first direction, making the adjustment of the opening and closing angle more convenient. This ensures the stability of the valve clamping device while reducing the risk of over-clamping.
[0020] Compared to the closed-loop clamping assembly method in related technologies, the valve clamp of this application embodiment allows for easier adjustment of the clamping space and opening / closing angle. Furthermore, the opening / closing angle of the clamping assembly can be adjusted by changing the relative displacement between the adjusting component and the main sleeve in the first direction, effectively reducing the risk of leaflet tearing during valve clamping. Attached Figure Description
[0021] Figure 1 A schematic diagram illustrating the application scenarios of valve clips; Figure 2 A three-dimensional structural schematic diagram of a valve clamping system provided in this application; Figure 3 A three-dimensional structural schematic diagram of a valve clamp provided in this application; Figure 4 for Figure 3 A cross-sectional view of a valve clamp; Figure 5 for Figure 3A cross-sectional view of a valve clamp; Figure 6 for Figure 4 A cross-sectional view of the adjustment structure of the valve clamp; Figure 7 This application provides a schematic diagram of the structure of a dissociation device; Figure 8 This is a schematic diagram of a dissociation device provided in this application.
[0022] Figure label: 1. Left atrium; 2. Left ventricle; 3. Mitral valve; 31. Anterior leaflet; 32. Posterior leaflet; 10. Valve clamping system; 11. Valve clamp; 12. Disengagement device; 100, First clamping assembly; 110, Connecting post; 120, First clamping arm; 120a, First surface; 120b, Second surface; 121, Clamping teeth; 122, Protrusion; 101, Clamping space; 102, Clamping assembly; 200, Second clamping assembly; 210, Main sleeve; 220, Second clamping arm; 221, Receiving groove; 230, First hinge shaft; 240, Expanding wing; 300, Adjustment assembly; 310, Adjustment structure; 311, Inner sleeve; 3111a, First hole section; 3111b, Second hole section; 31 11c, Third hole section; 312, Outer sleeve; 313, Annular groove; 314, Annular boss; 315, Notch groove; 316, Slot; 320, Linkage structure; 400, First rod body; 500, Second rod body; 510, Drive unit; 700, Mating structure; 710, Insertion part; 720, Snap-fit assembly; 721, Seat body; 722, Elastic arm; 723, Locking mating part; 724, Hook; 730, Locking structure; 731, Locking sleeve; 7311, Base plate; 7312, Side plate; 732, Elastic element; D1, First Direction. Detailed Implementation
[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone.
[0024] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature, and in the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.
[0025] Figure 1 This is a schematic diagram illustrating the application scenarios of valve clips, such as... Figure 1 As shown, the mitral valve 3, acting as a one-way control valve between the left atrium 1 and the left ventricle 2, has the core function of ensuring unidirectional blood flow from the left atrium 1 to the ventricle and effectively preventing backflow of blood during ventricular contraction. This valve consists of a pair of leaflets, namely the anterior leaflet 31 and the posterior leaflet 32, which are connected to the papillary muscles within the left ventricle 2 via chordae tendineae, forming a stable anatomical structure to maintain valve function. Under physiological conditions, when the left ventricle 2 contracts, the edges of the anterior and posterior leaflets 32 can achieve tight apposition, completely blocking the path of blood backflow from the left ventricle 2 to the left atrium 1.
[0026] When the leaflets of the mitral valve 3 or its associated structures (such as chordae tendineae, papillary muscles, etc.) suffer from organic lesions or functional abnormalities, such as partial rupture of the chordae tendineae, the anterior and posterior leaflets 32 cannot properly align. In this situation, the mitral valve 3 cannot close completely during the contraction of left ventricle 2, and some blood leaks backward from left ventricle 2 into left atrium 1, triggering a series of chain-like pathophysiological changes. This clinical phenomenon is called "mitral valve 3 regurgitation".
[0027] Currently, a minimally invasive interventional treatment technique has been implemented in clinical practice. This technique is based on the concept of edge-to-edge valve repair. The valve clamp 11 is precisely delivered to the lesion site of the mitral valve 3 using an interventional delivery device. Subsequently, with the relative opening and closing action of the clamping components, the anterior and posterior leaflets 32 of the mitral valve 3 are simultaneously clamped, so that the two leaflets are in a fixed fit, that is, a "double-hole" structure is formed between the mitral valve 3, thereby reducing the regurgitation gap between the leaflets, and ultimately achieving the therapeutic goal of reducing mitral valve 3 regurgitation and improving cardiac hemodynamics.
[0028] In related technologies, valve clamps generally include a first clamping assembly, a second clamping assembly, and a closing ring. Both the first and second clamping assemblies are elastic structures made of shape memory alloy, meaning they are in an open state when not subjected to external force. A clamping group is formed between the first and second clamping assemblies to hold the anterior and posterior leaflets of the mitral valve. The closing ring is used to tighten around the clamping group, reducing its opening angle and thus fixing the anterior and posterior leaflets of the mitral valve, thereby reducing the leaflet gap and minimizing mitral regurgitation.
[0029] However, the aforementioned valve clip has two drawbacks: First, the gap between the first and second clamping components is difficult to adjust, preventing the valve clip from adjusting the gap between the clamping groups according to the thickness of the patient's valve, thus affecting the fit of the leaflet clamping. Specifically, the thickness of the mitral valve leaflets varies significantly among different patients (e.g., leaflets are thickened and calcified in patients with rheumatic heart disease, while leaflets are thinner in some patients with milder conditions). A smaller clamping space can easily lead to excessive compression of thick leaflets, causing leaflet tearing, ischemia, and necrosis. A larger clamping gap can easily lead to insecure leaflet clamping, resulting in clip displacement or detachment.
[0030] Secondly, once the closure ring is tightened around the clamping group, the opening angle between the clamping groups becomes difficult to adjust, preventing the valve clamp from adjusting the opening angle according to the patient's valve condition. Specifically, if the angle between the clamping groups is too large, it will restrict the leaflet opening amplitude during diastole, increase the transvalvular pressure gradient, and lead to increased left ventricular ejection resistance. If the angle between the clamping groups is too large, the "double-hole" structure will be loose, resulting in poor regurgitation control and an inability to effectively improve left atrial volume load. In addition, the process of tightening the closure ring around the clamping group requires rotating or pushing the closure ring, which can easily cause leaflet stretching or torsion, increasing the risk of leaflet tearing.
[0031] In view of this, this application discloses a valve clamp and its release device, and a valve clamping system, which can facilitate the adjustment of the clamping space within the clamping assembly and the opening and closing angle of the valve clamp.
[0032] Figure 2 This is a three-dimensional structural diagram of a valve clamping system provided in this application. Figure 2 As shown, the valve clamping system 10 includes a valve clamp 11 and a release device 12.
[0033] The valve clamp 11 is an implantable device that is inserted into the patient's body. It is used to clamp the anterior leaflet 31 and posterior leaflet 32 of the mitral valve 3 by clamping the clamping assembly 102. Then, by closing the clamping assembly 102, the gap between the anterior leaflet 31 and posterior leaflet 32 is reduced, thereby reducing mitral valve regurgitation.
[0034] The disengagement device 12 is used in conjunction with the valve clamp 11 and is detachably connected to the valve clamp 11. When the disengagement device is connected to the valve clamp 11, the disengagement device 12 can be used to send the valve clamp 11 into a predetermined position. At the same time, the disengagement device 12 can also be used to adjust the clamping space 101 in the clamping assembly 102 and the opening and closing angle α of the clamping assembly 102.
[0035] The specific structure of the valve clamp 11 is described below with reference to the accompanying drawings.
[0036] Figure 3 This application provides a three-dimensional structural schematic diagram of a valve clamp, wherein,Figure 3 The state when the first clamping assembly and the second clamping assembly are separated is shown; Figure 4 for Figure 3 A cross-sectional view of a valve clamp, wherein, Figure 4 The first clamping assembly and the second clamping assembly are shown in an assembled state, with the opening and closing angle at its maximum. Figure 5 for Figure 3 A cross-sectional view of a valve clamp, wherein, Figure 5 This shows the maximum convergence state of the valve clamp; Figure 6 for Figure 4 A cross-sectional view of the adjustment structure of the valve clamp.
[0037] like Figure 2 and Figure 3 As shown, the valve clamp 11 includes: a first clamping assembly 100, a second clamping assembly 200, and an adjustment assembly 300.
[0038] The first clamping assembly 100 includes a connecting post 110 and a plurality of first clamping arms 120. The plurality of first clamping arms 120 are circumferentially spaced around the connecting post 110. Each first clamping arm 120 is connected to the connecting post 110 at an angle. The first clamping arms 120 are elastic clamping arms. Under the action of elastic restoring force, the plurality of first clamping arms 120 tend to move away from each other. The second clamping assembly 200 includes a main sleeve 210 and a plurality of second clamping arms 220. The plurality of second clamping arms 220 are circumferentially spaced around the main sleeve 210. Each second clamping arm 220 is hinged to the main sleeve 210. The connecting post 110 is slidably inserted through the main sleeve 210 along the first direction D1 and is anti-rotationally engaged with the main sleeve 210. The plurality of second clamping arms 220 correspond one-to-one with the plurality of first clamping arms 120. Each second clamping arm 220 and a first clamping arm 120 cooperate along the first direction D1 to form a clamping group 102 for clamping the valve. The adjustment assembly 300 includes an adjustment structure 310 and a connecting rod structure 320. The adjustment structure 310 is located outside the main sleeve 210. The connecting rod structure 320 includes multiple connecting rods, which are arranged one-to-one with multiple second clamping arms 220. Each connecting rod is hinged to the adjustment structure 310 and the second clamping arm 220 respectively. The adjustment structure 310 is adjustablely positioned outside the main sleeve 210 along a first direction D1. The first direction D1 is parallel to the axial direction of the connecting column 110 and the axial direction of the main sleeve 210.
[0039] Specifically, such as Figure 2 to Figure 5As shown, the plurality of first clamping arms 120 of the first clamping assembly 100 are all elastic clamping arms. That is, when the first clamping arms 120 are not subjected to external force, the free ends of the plurality of first clamping arms 120 move away from each other under the action of elastic restoring force. When the first clamping arms 120 are tightened by external force, the free ends of the plurality of first clamping arms 120 converge, and the first clamping arms 120 have a tendency to resist the external force under the action of elastic restoring force.
[0040] Furthermore, the connecting post 110 extends along the first direction D1, and each first clamping arm 120 is connected to the connecting post 110 at an angle. When the first clamping arm 120 is tightened by an external force, the angle between each first clamping arm 120 and the connecting post 110 decreases, and the first clamping assembly 100 is in a tightened state. When the external force is removed, the angle between each first clamping arm 120 and the connecting post 110 returns to a predetermined angle, and the first clamping assembly 100 is in an expanded state.
[0041] For example, the connecting post 110 and the plurality of first clamping arms 120 can be an integrally formed structure. The material of the first clamping assembly 100 can be a shape memory alloy.
[0042] like Figure 2 to Figure 5 As shown, the second clamping assembly 200 includes a main sleeve 210 and a plurality of second clamping arms 220, each of which is hinged to the main sleeve 210 via a first hinge shaft 230. The plurality of second clamping arms 220 are arranged in a one-to-one correspondence with the plurality of first clamping arms 120; that is, the projection of the first clamping arm 120 in the first direction D1 at least partially overlaps with the second clamping arm 220. The corresponding first clamping arm 120 and second clamping arm 220 form a clamping group 102, and the space between the first clamping arm 120 and the second clamping arm 220 forms a clamping space 101 of the clamping group 102, which can be used to clamp the leaflets.
[0043] For example, both the first clamping arm 120 and the second clamping arm 220 are provided in pairs. One pair of first clamping arms 120 and second clamping arms 220 forms a first clamping group 102, and the other pair of first clamping arms 120 and second clamping arms 220 forms a second clamping group 102. The first clamping group 102 can be used to clamp the anterior leaflet 31, and the second clamping group 102 can be used to clamp the posterior leaflet 32.
[0044] Furthermore, the connecting post 110 of the first clamping assembly 100 is slidably inserted through the main sleeve 210 along the first direction D1 and engages with the main sleeve 210 in a non-rotating manner. The relative movement of the connecting post 110 and the main sleeve 210 along the first direction D1 can change the distance between the first clamping arm 120 and the second clamping arm 220, thereby changing the size of the clamping space 101 within a clamping group 102. When the patient's leaflets are thicker, the connecting post 110 can be pushed to increase the clamping space 101 within the clamping group 102. When the patient's leaflets are thinner, the connecting post 110 can be pulled to decrease the clamping space 101 within the clamping group 102, thus allowing the valve clamp 11 to adjust the size of the clamping space 101 according to the thickness of the patient's leaflets. An appropriate clamping space 101 reduces the risk of excessive leaflet compression and also reduces the risk of the valve clamp 11 falling off due to insecure fixation.
[0045] Furthermore, the second clamping arm 220 of the second clamping assembly 200 is a non-elastic clamping arm, and the angle between the second elastic clamping arm and the main sleeve 210 can be adjusted by adjusting the relative displacement between the main sleeve 210 and the adjusting assembly 300 to change the opening and closing angle α of the clamping group 102.
[0046] Specifically, such as Figure 2 to Figure 5 As shown, the adjustment assembly 300 includes an adjustment structure 310 and a connecting rod structure 320. The adjustment structure 310 is adjustablely positioned outside the main sleeve 210 along a first direction D1. The connecting rod structure 320 includes multiple connecting rods corresponding to multiple second clamping arms 220. The first end of each connecting rod is hinged to the adjustment structure 310, and the second end is hinged to the middle of the second clamping arm 220. The second clamping arm 220 is also hinged to the main sleeve 210 via a first hinge shaft 230. Adjusting the position of the adjustment structure 310 increases the distance between the first hinge shaft 230 and the adjustment structure 310. At this time, the first hinge shaft 230 drives the inner end of the second clamping arm 220 away from the adjustment structure 310, increasing the included angle between the second clamping arms 220. Under the action of the elastic restoring force, the first clamping arm 120 expands along with the second clamping arm 220, increasing the opening angle α of the clamping assembly 102. Correspondingly, by adjusting the position of the adjusting structure 310, the distance between the first hinge shaft 230 and the adjusting structure 310 is reduced. At this time, the first hinge shaft 230 drives the inner end of the second clamping arm 220 to approach the adjusting structure 310, reducing the angle between the second clamping arms 220. The elastic restoring force of the second clamping arms 220 against the first clamping arm 120 reduces the opening angle α of the clamping assembly 102. Therefore, the opening angle α can be adjusted by adjusting the position of the adjusting component 300 in the first direction D1, making the adjustment of the opening angle α more convenient. This ensures the stability of the valve clamp 11 while reducing the risk of over-clamping.
[0047] Compared to the closed-loop clamping assembly 102 in related technologies, the valve clamp 11 of this application embodiment allows for easier adjustment of the clamping space 101 and the opening / closing angle α. Furthermore, the opening / closing angle of the clamping assembly 102 can be adjusted by changing the relative displacement between the adjusting component 300 and the main sleeve 210 in the first direction D1, effectively reducing the risk of leaflet tearing during the clamping process of the valve clamp 11.
[0048] It should also be noted that during the delivery of the valve clamp 11 into the patient's body, the opening and closing angle α of the clamping assembly 102 can be adjusted to the minimum (e.g., Figure 5 (As shown), to improve the smoothness of valve clamp insertion 11.
[0049] like Figure 4 to Figure 6 As shown, the adjusting assembly 300 includes an inner sleeve 311 and an outer sleeve 312. The inner sleeve 311 is sleeved on the outer periphery of the main sleeve 210 and threadedly connected to the main sleeve 210. The outer sleeve 312 is rotatably sleeved on the outer periphery of the inner sleeve 311 around the first direction D1 and is in a stop engagement with the inner sleeve 311 along the first direction D1. The connecting rod is hinged to the outer sleeve 312.
[0050] For example, when adjusting the opening angle, the inner sleeve 311 can be rotated counterclockwise. At this time, the main sleeve 210 drives the first hinge shaft 230 away from the inner sleeve 311, raising the inner end of the second clamping arm 220 upward, thereby increasing the opening angle α of the clamping assembly 102. When the inner sleeve 311 is rotated clockwise, the main sleeve 210 drives the first hinge shaft 230 closer to the inner sleeve 311, moving the inner end of the second clamping arm 220 downward, thereby decreasing the opening angle α of the clamping assembly 102.
[0051] like Figure 6 As shown, the inner hole of the inner sleeve 311 includes a first hole section 3111a, a second hole section, and a third hole section 3111c that are connected sequentially along the first direction D1; the first hole section 3111a is threadedly connected to the main sleeve 210; the diameter of the second hole section is smaller than the diameter of the first hole section 3111a; the inner wall of the third hole section 3111c has an anti-rotation surface parallel to the first direction D1.
[0052] The third hole 3111c can be inserted into the second rod 500 in the disengagement device 12. The second rod 500 is provided with an anti-rotation mating surface. When the second rod 500 rotates, it can drive the inner sleeve 311 to rotate synchronously, thereby realizing the adjustment of the opening and closing angle α. The second hole can be used to pass through the first rod 400 in the disengagement device 12. The first rod 400 can be threadedly connected to the connecting post 110. After the first rod 400 is threadedly connected to the connecting post 110, pulling the first rod 400 can adjust the distance between the first clamping arm 120 and the second clamping arm 220, thereby realizing the adjustment of the clamping space 101. The diameter of the second hole is smaller than that of the first hole 3111a. Therefore, a step surface can be formed between the first hole 3111a and the second hole. When the end face of the main sleeve 210 abuts against the step surface, the first hinge shaft 230 is in the position closest to the inner sleeve 311, the opening and closing angle α of the clamping group 102 is the smallest, and the valve clamp 11 is in the maximum contraction state.
[0053] like Figure 6 As shown, an annular groove 313 and an annular boss 314 are provided between the inner sleeve 311 and the outer sleeve 312. The annular boss 314 can extend into the annular groove 313 and can rotate around the first direction D1 within the annular groove 313, so that the outer sleeve 312 and the inner sleeve 311 can rotate relative to each other and move synchronously, thereby achieving the effect of adjusting the opening and closing angle α of the clamping assembly 102.
[0054] For example, the annular groove 313 can be provided on the outer wall of the inner sleeve 311, and the annular boss 314 can be provided on the inner wall of the outer sleeve 312.
[0055] In other embodiments, the annular groove 313 may also be provided on the inner wall of the outer sleeve 312, and the annular boss 314 may be provided on the outer wall of the inner sleeve 311.
[0056] like Figure 4 As shown, the outer sleeve 312 has a first end face near the first clamping assembly 100. The first end face is provided with a notch 315 extending along the first direction D1. The first end of the connecting rod is hinged to the notch 315. The notch 315 provides a hinge space for the first end of the connecting rod, which helps to achieve miniaturization of the valve clamp 11.
[0057] like Figure 3 to Figure 5 As shown, the second clamping arm 220 has a receiving groove 221 on its surface facing the first clamping arm 120. The first clamping arm 120 has a clamping position that extends into the receiving groove 221 and a separating position that is away from the receiving groove 221. When the first clamping arm 120 is in the clamping position, the first clamping arm 120 abuts against the groove wall of the receiving groove 221 under the action of the restoring force.
[0058] Specifically, the receiving groove 221 provides a limiting space for the first clamping arm 120. After the first clamping arm 120 extends into the receiving groove 221, the groove wall can form circumferential and lateral constraints on it. During the delivery and intraoperative adjustment of the valve clamp, the receiving groove 221 can effectively prevent the first clamping arm 120 and the second clamping arm 220 from misalignment or deflection, ensuring that the first clamping arm 120 and the second clamping arm 220 in the clamping assembly 102 are always in a precise corresponding state, effectively reducing the risk of valve leaflet clamping failure due to clamping arm misalignment, and structurally ensuring the stability of the clamping position.
[0059] Furthermore, such as Figure 4 As shown, the first clamping arm 120 has a protrusion 122 at the end away from the connecting post 110, and the protrusion 122 protrudes at least from the surface of the first clamping arm 120 facing the second clamping arm 220.
[0060] Specifically, the first clamping arm 120 includes a first surface 120a facing the second clamping arm 220 and a second surface 120b facing away from the first clamping arm 120. The protrusion 122 protrudes from the first surface 120a of the first clamping arm 120 to improve the clamping effect of the first clamping arm 120 and the second clamping arm 220.
[0061] Preferably, the protrusion 122 may also protrude from the second surface 120b of the first clamping arm 120. When the valve clamp 11 is in the contracted state, the protrusion 122 between the two first clamping arms 120 can achieve a tighter clamping effect on the anterior leaflet 31 and the posterior leaflet 32.
[0062] Furthermore, such as Figure 3 and Figure 4 As shown, the first surface 120a of the first clamping arm 120 is also provided with clamping teeth 121. The clamping teeth 121 are inclined toward the first hinge shaft 230. When the leaflet has a tendency to detach from the clamping assembly 102, the engagement between the clamping teeth 121 and the leaflet increases, reducing the risk of the leaflet detaching from the clamping space 101.
[0063] Furthermore, the second clamping arm 220 has a first side and a second side that are arranged opposite to each other. Expansion wings 240 can be provided on the first side and the second side respectively to increase the contact area between the second clamping arm 220 and the leaflet, thereby increasing the clamping range of the valve clamp 11.
[0064] The specific implementation of the dissociation device 12 is described below with reference to the accompanying drawings.
[0065] like Figure 2As shown, the dissociation device 12 is a minimally invasive interventional manipulator that works in conjunction with the adjustable valve clip 11. It is used to deliver the valve clip 11, adjust its position during surgery, and release it after implantation. It adopts a multi-rod coaxial nested design, with each rod structure having a clear division of labor and not interfering with each other. This solves the technical defects of traditional dissociation devices 12, which can only complete simple delivery and cannot adjust the clamping space 101 and opening angle, thus providing manipulatory support for individualized mitral valve repair surgery.
[0066] like Figure 4 As shown, the dissociation device 12 includes: a first rod 400, a second rod 500, and a mating structure 700.
[0067] Specifically, the first rod 400 is inserted into the main sleeve 210 and detachably connected to the connecting post 110. After the first rod 400 is connected to the connecting post 110, pushing and pulling the first rod 400 via the external control terminal can directly drive the connecting post 110 to slide relative to the main sleeve 210 along the first direction D1 axial direction. By utilizing the sliding engagement relationship between the connecting post 110 and the main sleeve 210, the relative distance between the first clamping arm 120 and the corresponding second clamping arm 220 can be changed, thereby freely adjusting the size of the clamping space 101 within the clamping assembly 102. After the valve clamp 11 has completed the clamping of the valve leaflets and confirmed reliable fixation, the connection between the first rod 400 and the connecting post 110 can be released, realizing the separation of the dissociation device 12 from the implantable clamp, successfully completing the device implantation, and meeting the clinical needs for postoperative release after minimally invasive interventional surgery.
[0068] For example, the first rod 400 can be threadedly connected to the connecting post 110. The connecting post 110 has a threaded hole at its bottom and a threaded post at its end. The first rod 400 can be assembled or disassembled from the connecting post 110 by rotating the first rod 400.
[0069] The second rod 500 is used to be sleeved on the outside of the first rod 400 and can slide or rotate relative to the first rod 400. The first rod 400 and the second rod 500 adopt a coaxial nested structure. Under the limited inner diameter of the vascular interventional access, multiple control rods are integrated to minimize the overall outer diameter of the dissociation device 12 and ensure that the interventional device can smoothly enter the predetermined position.
[0070] Furthermore, the second rod 500 can slide and rotate independently relative to the first rod 400, structurally enabling independent adjustment of the clamping space 101 and the opening / closing angle. During the procedure, pushing and pulling operations on the first rod 400 and rotating / pushing and pulling operations on the second rod 500 do not interfere with each other. The surgeon can adjust the clamping space 101 and the opening / closing angle separately according to the surgical needs, improving operational flexibility and precision.
[0071] The cooperating structure 700 is set on the second rod 500 for detachable connection with the valve clamp 11 and for driving the adjustment structure 310 to move along the first direction D1. The rotational and axial pushing and pulling forces exerted on the second rod 500 by the external body are stably and accurately transmitted to the adjustment structure 310. Relying on the transmission relationship between the adjustment structure 310, the connecting rod and the second clamping arm 220, the opening and closing angle of the clamping assembly 102 can be flexibly adjusted.
[0072] Figure 7 This application provides a schematic diagram of the structure of a dissociation device, wherein, Figure 7 The open state of the flexible arm is shown; Figure 8 This application provides a schematic diagram of the structure of a dissociation device, wherein, Figure 8 The contracted state of the elastic arm is shown.
[0073] Furthermore, combined Figure 4 , Figure 6 , refer to Figure 7 and Figure 8 The mating structure 700 includes a plug-in portion 710, which is disposed at one end of the second rod 500 near the valve clamp 11. The plug-in portion 710 has an anti-rotation mating surface and can extend into the third hole section 3111c. The anti-rotation mating surface and the anti-rotation mating surface are in anti-rotation mating engagement.
[0074] When the insertion part 710 extends into the third hole section 3111c of the inner sleeve 311, the anti-rotation mating surface abuts against the anti-rotation surface of the third hole section 3111c. During the operation, when the second rod 500 is rotated through the external control end, the torsional torque can be transmitted to the inner sleeve 311 of the valve clamp 11 through the anti-rotation mating structure 700, thereby driving the inner sleeve 311 to rotate relative to the main sleeve 210. Since the inner sleeve 311 and the main sleeve 210 are threaded, and the main sleeve 210 is anti-rotated with the connecting post 110, the rotational motion is converted into axial linear motion, causing the main sleeve 210 to drive the first hinge shaft 230 to move closer to or away from the inner sleeve 311, and the opening angle α of the clamping assembly 102 is precisely adjusted through the connecting rod structure 320.
[0075] For example, the cross-section of the insertion portion 710 can be a polygonal structure, such as a regular hexagonal structure. Correspondingly, the third hole segment 3111c is also a regular hexagonal hole. One plane of the hole wall of the third hole segment 3111c forms an anti-rotation surface, and one side of the insertion portion 710 forms an anti-rotation mating surface.
[0076] Furthermore, such as Figure 7 and Figure 8As shown, the mating structure 700 also includes a snap-fit assembly 720 and a locking structure 730. The snap-fit assembly 720 includes a base 721 and elastic arms 722. The base 721 is fixedly connected to the outer periphery of the second rod 500. Multiple elastic arms 722 are provided, and they are angledly disposed on the base 721. A locking engagement part 723 is provided on the side of the elastic arm 722 closest to the second rod 500. The locking structure 730 is slidably connected to the second rod 500. A driving part 510 is fixedly connected to the second rod 500. The driving part 510 is used to drive the locking structure 730 to slide along the second rod 500. Under the action of elastic restoring force, the free ends of the multiple elastic arms 722 tend to move away from each other. The locking sleeve 731 can cooperate with the locking engagement part 723 to stop and counteract the elastic restoring force of the elastic arms 722, so that the elastic arms 722 clamp the outer sleeve 312.
[0077] In the above structure, the snap-fit assembly 720 and the locking structure 730 are used to achieve tight fixation and axial limitation of the outer sleeve 312, and to achieve reliable locking of the disengagement device 12 and the valve clamp 11 during intervention and surgery, and rapid disengagement after surgery.
[0078] Specifically, such as Figure 7 and Figure 8 As shown, the elastic arm 722 includes a connecting end and a free end, and the elastic arm 722 is connected to the base 721 through the connecting end. When the elastic arm 722 is not subjected to external force, the free ends of the multiple elastic arms 722 move away from each other under the action of elastic restoring force. When the elastic arm 722 is tightened by external force, the free ends of the multiple elastic arms 722 converge, and the elastic arm 722 has a tendency to resist the external force under the action of elastic restoring force. A locking engagement part 723 is provided on the side of the elastic arm 722 near the second rod 500. The locking engagement part 723 is a locking structure 730, which provides the point of application of the tightening force.
[0079] The locking structure 730 is slidably connected to the second rod 500. A driving part 510 is provided on the second rod 500. When the second rod 500 is pulled, the driving part 510 drives the locking structure 730 to slide along the axial direction of the second rod 500. Before the valve clamp 11 is inserted, the locking structure 730 engages with the locking engagement part 723 to stop and tighten the elastic arm 722, allowing the elastic arm 722 to grip the outer sleeve 312. This connects the disengagement device 12 to the valve clamp 11, and the valve clamp 11 can be inserted into the patient's body by operating the disengagement device 12. Once the valve clamp 11 is adjusted, the second rod 500 can be pulled. The driving part 510 of the second rod 500 drives the locking structure 730 to slide along the second rod 500. The locking structure 730 loses its stop engagement with the locking engagement part 723 of the elastic arm 722. The elastic arm 722 automatically opens by its own elastic restoring force, releasing the outer sleeve 312 to complete the disengagement.
[0080] Furthermore, such as Figure 7 and Figure 8 As shown, the outer sleeve 312 is provided with a slot 316 ( Figure 3 As shown, a hook 724 is provided at the free end of the elastic arm 722. When the elastic arm 722 hugs the outer sleeve 312, the hook 724 will also extend into the slot 316, adding an embedded locking point on the basis of the tight locking, which counteracts the axial tension, thrust and circumferential rotation force between the valve clamp 11 and the elastic arm 722, making it easy to accurately adjust the position and posture of the valve clamp 11.
[0081] Furthermore, the locking structure 730 includes a locking sleeve 731 and an elastic member 732. The locking sleeve 731 is slidably sleeved on the second rod body 500, and the elastic member 732 is disposed between the locking sleeve 731 and the seat body 721. The driving part is located on the side of the locking sleeve 731 opposite to the elastic member 732. Under the action of the elastic restoring force, the elastic member 732 causes the locking sleeve 731 to abut against the driving part and limits the locking engagement part 723.
[0082] Specifically, under the action of its own elastic restoring force, the elastic element 732 continuously pushes the locking sleeve 731 towards the valve clamp 11, so that the locking sleeve 731 always abuts against the drive part and stably limits the locking engagement part 723 on the elastic arm 722. The elastic arm 722 can be stably kept in the clamped state, holding the outer sleeve 312 tightly, ensuring that the release device 12 and the valve clamp 11 are connected and stable throughout the process, providing a reliable structural basis for torque transmission and angle adjustment.
[0083] After the valve clamp 11 clamps the valve, pulling the second rod 500 causes the driving part 510 on the second rod 500 to drive the locking sleeve 731 to compress the elastic element until the locking sleeve 731 and the locking engagement part 723 lose engagement. The elastic arm 722 then springs open under its own elastic restoring force, thus separating from the valve clamp 11. Therefore, relying on the cooperation of the snap-fit structure and the locking structure 730, only pulling the second rod 500 is needed to separate the elastic arm 722 from the outer sleeve 312, improving the convenience of separating the separation device 12 from the valve clamp.
[0084] In some embodiments, the locking sleeve 731 includes a base plate 7311 and a side plate 7312 disposed on the outer periphery of the base plate 7311; the locking engagement portion 723 includes a limiting arm extending toward the locking sleeve 731, and the side plate 7312 extends between the limiting arm and the elastic arm 722 to counteract the elastic restoring force of the elastic arm 722. The base plate 7311 can provide a force-bearing surface for the elastic element 732 and can also serve as a mounting base for the side plate 7312. A slot for inserting the side plate 7312 can be formed between the limiting arm and the elastic arm 722. When the side plate 7312 extends into the slot, the inner wall of the side plate 7312 can stop the limiting arm, thereby preventing the elastic arm 722 from springing open.
[0085] The following describes the process of intervention, adjustment, and disengagement of the valve clamping system 10.
[0086] Before the valve clamp 11 is inserted, the disengagement device 12 is assembled with the valve clamp 11 to ensure they are connected. Specifically, the first rod 400 is rotated to connect with the connecting post 110, and the insertion part 710 of the second rod 500 is inserted into the third hole 3111c. The second rod 500 is pulled, causing the driving part to drive the locking sleeve 731 to compress the elastic element 732, and the elastic arm 722 is pinched to tighten it. The hook 724 on the elastic arm 722 is inserted into the slot 316 of the outer sleeve 312. The second rod 500 is released, and the elastic element 732 pushes the locking sleeve 731 closer to the valve clamp 11 under the action of the restoring force until the locking sleeve 731 clamps the limiting arm, thus achieving the tightening effect on the elastic arm 722. At this time, the elastic arm 722 can clamp the outer sleeve 312, and the disengagement device 12 is connected to the valve clamp 11.
[0087] The opening and closing angle of the valve clamp 11 and the clamping assembly 102 can then be adjusted so that the valve clamp 11 is in its maximum contraction state. The opening and closing angle of the clamping assembly 102 can be adjusted by rotating the second rod 500 to drive the inner sleeve 311 to rotate.
[0088] During intervention, the valve clamp 11 is moved to the mitral valve using the disengagement device 12. The second rod 500 is rotated to open the clamping assembly 102. The first rod 400 is pulled to adjust the clamping space 101 between the first clamping arm 120 and the second clamping arm 220, so that the clamping space 101 is adapted to the patient's valve leaflet thickness. The second rod 500 is rotated to decrease the opening angle of the clamping assembly 102, adjusting the opening angle to a suitable state.
[0089] During disengagement, pulling the second rod 500 causes the driving part 510 on the second rod 500 to drive the locking sleeve 731 to compress the spring until the locking sleeve 731 loses its engagement with the locking engagement part 723. The elastic arm 722 then springs open under its own elastic restoring force, thus separating the elastic arm 722 from the outer sleeve 312. Rotating the first rod 400 separates it from the connecting post 110. Pulling the first rod 400 and the second rod 500 pulls the first rod 400 out of the main sleeve 210, and the insertion part 710 of the second rod 500 is pulled out from the third hole section 3111c, thus disengaging the disengagement device 12 from the valve clamp 11.
[0090] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.
Claims
1. A valve clamp, characterized in that, include: The first clamping assembly includes a connecting post and a plurality of first clamping arms. The plurality of first clamping arms are circumferentially spaced around the connecting post. Each first clamping arm is connected to the connecting post at an angle. The first clamping arms are elastic clamping arms. Under the action of elastic restoring force, the plurality of first clamping arms tend to move away from each other. The second clamping assembly includes a main sleeve and a plurality of second clamping arms. The plurality of second clamping arms are circumferentially spaced around the main sleeve. Each second clamping arm is hinged to the main sleeve. The connecting post is slidably inserted through the main sleeve along a first direction and is anti-rotationally engaged with the main sleeve. The plurality of second clamping arms correspond one-to-one with the plurality of first clamping arms. Each second clamping arm and one first clamping arm cooperate along the first direction to form a clamping assembly for clamping the valve. An adjustment assembly includes an adjustment structure and a linkage structure. The adjustment structure is located outside the main sleeve. The linkage structure includes multiple linkages, which are arranged one-to-one with the multiple second clamping arms. Each linkage is hinged to the adjustment structure and the second clamping arm. The adjustment structure is adjustablely positioned outside the main sleeve along the first direction. The first direction is parallel to the axial direction of the connecting column and the axial direction of the main sleeve.
2. The valve clamp according to claim 1, characterized in that, The adjustment assembly includes an inner sleeve and an outer sleeve; The inner sleeve is fitted around the outer periphery of the main sleeve and is threadedly connected to the main sleeve. The outer sleeve is rotatably fitted around the outer periphery of the inner sleeve in the first direction and is in a stop-fitting relationship with the inner sleeve in the first direction. The connecting rod is hinged to the outer sleeve.
3. The valve clamp according to claim 2, characterized in that, The inner hole of the inner sleeve includes a first hole segment, a second hole segment, and a third hole segment that are connected sequentially along a first direction; The first hole section is threadedly connected to the main sleeve; The diameter of the second hole section is smaller than the diameter of the first hole section; The inner wall of the third hole section has an anti-rotation surface parallel to the first direction.
4. The valve clamp according to claim 2, characterized in that, An annular groove and an annular boss are provided between the inner sleeve and the outer sleeve. The annular boss can extend into the annular groove and can rotate within the annular groove around a first direction. One of the annular groove and the annular boss is disposed in the inner sleeve, and the other is disposed in the outer sleeve.
5. The valve clamp according to claim 2, characterized in that, The outer sleeve has a notch extending in a first direction at one end facing the first clamping assembly, and the first end of the connecting rod is hinged to the notch.
6. The valve clamp according to any one of claims 1 to 5, characterized in that, The second clamping arm has a receiving groove on its surface facing the first clamping arm, and the receiving groove is used to receive the first clamping arm.
7. The valve clamp according to claim 6, characterized in that, The first clamping arm has a protrusion at the end away from the connecting post, and the protrusion protrudes at least from the surface of the first clamping arm facing the second clamping arm.
8. A dissociation device, characterized in that, The valve clamp adapted to any one of claims 1 to 7, the disengagement device comprising: The first rod is used to pass through the main sleeve and be detachably connected to the connecting post; The second rod is used to be sleeved on the outside of the first rod and can slide or rotate relative to the first rod. The adjusting structure is disposed on the second rod body for detachable connection with the valve clamp and for driving the adjusting structure to move along the first direction.
9. The dissociation device according to claim 8, characterized in that, The adjusting assembly includes an inner sleeve and an outer sleeve. The outer sleeve is rotatably fitted around the outer periphery of the inner sleeve and is stop-fitted with the inner sleeve along the first direction. The connecting rod is hinged to the outer sleeve. The inner hole of the inner sleeve includes a first hole segment, a second hole segment, and a third hole segment that are connected sequentially along a first direction; the inner wall of the third hole segment has an anti-rotation surface parallel to the first direction. The mating structure includes a plug-in portion, which is disposed at one end of the second rod near the valve clamp. The plug-in portion has an anti-rotation mating surface, and the plug-in portion is used to extend into the third hole section so that the anti-rotation mating surface and the anti-rotation mating surface are in anti-rotation mating engagement.
10. The dissociation device according to claim 9, characterized in that, The mating structure also includes a snap-fit component and a locking structure; The snap-fit assembly includes a base and a plurality of elastic arms disposed on the base. The base is fixedly connected to the outer periphery of the second rod. The elastic arms are connected to the base at an angle. A locking engagement part is provided on the side of the elastic arm near the second rod. The locking structure is slidably connected to the second rod, and the second rod is fixedly connected to a driving part, which is used to drive the locking structure to slide along the second rod. The ends of the plurality of elastic arms that are away from the seat tend to move away from each other under the action of elastic restoring force. The locking structure is used to cooperate with the locking engagement part to counteract the elastic restoring force of the elastic arms, so that the elastic arms clamp the outer sleeve.
11. The dissociation device according to claim 10, characterized in that, The outer sleeve is provided with a slot, and the elastic arm is provided with a hook at the end away from the base; The locking structure can engage with the locking part to counteract the elastic restoring force of the elastic arm, allowing the hook to extend into the slot.
12. The dissociation device according to claim 10, characterized in that, The locking structure includes a locking sleeve and an elastic element. The locking sleeve is slidably fitted onto the second rod body, and the elastic element is disposed between the locking sleeve and the seat body. The driving part is located on the side of the locking sleeve opposite to the elastic member. The elastic member is used to make the locking sleeve abut against the driving part under the action of elastic restoring force. The locking sleeve is used to limit the locking engagement part.
13. The dissociation device according to claim 12, characterized in that, The locking sleeve includes a base plate and side plates disposed on the outer periphery of the base plate; The locking engagement portion includes a limiting arm extending toward the locking sleeve, and the side plate extends between the limiting arm and the elastic arm to counteract the elastic restoring force of the elastic arm.
14. A valve clamping system, characterized in that, include: A valve clamp, wherein the valve clamp is the valve clamp according to any one of claims 1 to 7; A dissociation device, wherein the dissociation device is any one of claims 8 to 13.