Clamping equipment

Abstract

The present application provides a clamping device, which mainly includes a base, at least two clamping structures, and a locking structure. Each clamping structure is provided on the base and can pivot relative to the base, and each clamping structure can switch between a clamped state and a non-clamped state. The locking structure is provided on the base and can switch between a locked state and an unlocked state to allow or restrict each clamping structure from pivoting relative to the base. In this way, the clamping device of the present application can flexibly adjust the pivot angle of the clamping structure relative to the base.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of medical devices, and in particular to a clamping device. Background Art

[0002] Structural heart disease refers to anatomical abnormalities that cause changes in the internal tissues of the heart and the blood vessels that send them, resulting in changes in the vascular anatomy and physiological structure of the heart, including congenital heart disease, valvular heart disease, cardiomyopathy and large vessel disease.

[0003] In recent years, with the advancement of technology, domestic and international manufacturers have developed a number of interventional devices for treating mitral regurgitation. Abbott's MitraClip is a prime example. The MitraClip is inserted via a catheter through the femoral vein and through the atrial septum. The clip is advanced from the atrium down to the vicinity of the mitral valve, where it clamps the free edges of the anterior and posterior leaflets, creating a double-opening in the mitral valve. This allows for optimal coaptation of the leaflets at end-systole, reducing regurgitation.

[0004] The current unilateral control leaflet clip has the problem of instability after clamping. The implant may become loose or even fall off due to the leaflet repeatedly exerting force on the clip, which may cause the operation to fail. Summary of the Invention

[0005] In view of the above problems, the present application provides a clamping device that can flexibly adjust the pivot angle of the clamping structure relative to the base and provide a stable clamping force.

[0006] The present application provides a clamping device, which includes a base; at least two clamping structures, which are arranged on the base and can pivot relative to the base, and each of the clamping structures can switch between a clamped state and a non-clamped state; and a locking structure, which is arranged on the base and can switch between a locked state and a non-locked state to allow or restrict each of the clamping structures from pivoting relative to the base.

[0007] Optionally, the base includes a clamping seat and a core shaft passing through the clamping seat; the clamping structure includes an outer clamping arm and a linkage arm; wherein, the outer clamping arm is pivotally connected to the clamping seat, and the linkage arm is pivotally connected to the outer clamping arm and the core shaft respectively; wherein, when the core shaft moves axially relative to the clamping seat, the outer clamping arm can be driven to pivot relative to the clamping seat via the linkage arm.

[0008] Optionally, the opposite ends of the linkage arm are pivotally connected to the end of the core shaft and the middle position of the outer clamping arm respectively; wherein, the outer clamping arm can apply a reverse force to the linkage arm to cause the linkage arm to produce elastic bending deformation, so that the outer clamping arm is in the expected position relative to the clamping seat.

[0009] Optionally, when the locking structure is in the locked state, the core shaft can be restricted from axial movement relative to the clamping seat to restrict the clamping structure from pivoting relative to the clamping seat; when the locking structure is in the unlocked state, the core shaft can be allowed to move axially relative to the clamping seat to allow the clamping structure to pivot relative to the clamping seat.

[0010] Optionally, the locking structure includes: a locking member, which is separately provided on the clamping seat and the core shaft, wherein the locking member can be elastically deformed under a force state to allow the core shaft to move relative to the clamping seat, and the locking member can elastically recover under an unforced state to limit the movement of the core shaft relative to the clamping seat; an adjusting member, which is provided on the core shaft and can move relative to the clamping seat to apply a force to the locking member or release the force applied to the locking member.

[0011] Optionally, the locking member includes a plurality of positioning grooves spaced apart along the axial direction of the core shaft and two locking teeth symmetrically arranged on the clamping seat; wherein, the adjusting member can be moved relative to the core shaft in a direction approaching the clamping seat by an external force, so as to apply a thrust force to each of the locking teeth, so that each of the locking teeth is elastically deformed and disengaged from the positioning groove, thereby allowing the core shaft to move relative to the clamping seat; when the external force is released, the adjusting member can be moved relative to the core shaft in a direction away from the clamping seat by the elastic restoring force of the locking teeth, so as to release the thrust force applied to each of the locking teeth, so that each of the elastically restored locking teeth is engaged in the positioning groove, so as to limit the movement of the core shaft relative to the clamping seat.

[0012] Optionally, the clamping device further comprises a driving member connected to the adjusting member, so that the driving member applies a force to the adjusting member, so that the adjusting member moves relative to the core shaft in a direction close to the clamping seat.

[0013] Optionally, the locking member includes a plurality of positioning grooves spaced apart along the axial direction of the core shaft and two locking teeth symmetrically arranged on the clamping seat; wherein, the adjusting member can be moved relative to the core shaft in a direction approaching the clamping seat by a first external force to apply a resisting force to each locking tooth, so that each locking tooth is elastically deformed and disengaged from the positioning groove, thereby allowing the core shaft to move relative to the clamping seat; or the adjusting member can be moved relative to the core shaft in a direction away from the clamping seat by a second external force to release the resisting force applied to each locking tooth, so that each locking tooth is elastically restored and engaged in the positioning groove to limit the movement of the core shaft relative to the clamping seat.

[0014] Optionally, the clamping structure further includes an inner clamping arm, which is pivotally connected to the outer clamping arm or the clamping seat; wherein the inner clamping arm can pivot relative to the outer clamping arm to allow the clamping structure to switch between the clamping state and the non-clamping state.

[0015] Optionally, the outer clamping arm comprises an arc-shaped blade, and the inner clamping arm comprises an elastic band.

[0016] Optionally, the clamping structure further includes an inner clamping arm anti-slip portion provided on the inner clamping arm and / or an outer clamping arm anti-slip portion provided on the outer clamping arm.

[0017] Optionally, the inner clamp arm anti-slip portion includes a barb provided on the elastic band and extending toward the arc-shaped blade; the outer clamp arm anti-slip portion includes an anti-slip groove provided on the arc-shaped blade.

[0018] It can be seen from the above technical solutions that the clamping instrument of the embodiment of the present application can flexibly adjust the pivot angle of each clamping structure relative to the base through the design of the locking structure, so that the spacing distance between each target tissue clamped in each clamping structure meets the expectations, thereby improving the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of an embodiment of the clamping device of the present application in a locked state.

[0021] Figure 2 for Figure 1 An enlarged schematic diagram of the local structure of the clamping device shown.

[0022] Figure 3 This is a schematic diagram of an embodiment of the clamping device of the present application in an unlocked state.

[0023] Figure 4 for Figure 3 An enlarged schematic diagram of the local structure of the clamping device shown.

[0024] Component number

[0025] 10: Clamping device;

[0026] 20: base;

[0027] 22: Clamping seat;

[0028] 24: mandrel;

[0029] 30: sandwich structure;

[0030] 32: outer clamp arm;

[0031] 322: curved blades;

[0032] 324: outer clamp arm anti-drop portion;

[0033] 34: linkage arm;

[0034] 36: Inner clamping arm;

[0035] 362: elastic band;

[0036] 364: inner arm anti-drop part;

[0037] 40: Locking structure;

[0038] 42: locking piece;

[0039] 422: positioning slot;

[0040] 424: locking tooth;

[0041] 44: Adjustment piece;

[0042] 50: driving part. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0044] The specific implementation of the embodiment of the present application will be further explained below in conjunction with the drawings of the embodiment of the present application.

[0045] The clamping device 10 of this embodiment can be used as an edge-to-edge repair implant in the field of interventional treatment of structural heart disease. It can reach the designated anatomical position through a minimally invasive transvascular approach or through the atrial appendage to achieve heart valve repair treatment.

[0046] Please refer to Figures 1 to 4 ,in, Figure 1 and Figure 3 Schematic diagrams of embodiments of the clamping device in a locked state and an unlocked state, respectively. Figure 2 and Figure 4 They are Figure 1 and Figure 3 A partial enlarged schematic diagram.

[0047] As shown in the figures, the clamping device 10 of this embodiment mainly includes a base 20 , at least two clamping structures 30 , and a locking structure 40 .

[0048] In this embodiment, the base 20 may include a clamping seat 22 and a core shaft 24 passing through the clamping seat 22 , wherein the core shaft 24 is axially movable relative to the clamping seat 22 .

[0049] In this embodiment, each clamping structure 30 may be disposed on the base 20 and may pivot relative to the base 20 , and each clamping structure 30 may be switched between a clamping state and a non-clamping state.

[0050] For example, the base 20 may be positioned at the target center, and each clamping structure 30 may be disposed around the base 20 to clamp or release each target tissue adjacent to the target center, thereby adjusting the spacing distance between each target tissue.

[0051] Optionally, the clipping device 10 can be used to treat mitral regurgitation.

[0052] Specifically, the target tissue may include the anterior mitral valve leaflet and the posterior mitral valve leaflet. The two clamping structures 30 of the clamping device 10 can be used to clamp the anterior mitral valve leaflet and the posterior mitral valve leaflet respectively to treat the problem of mitral valve insufficiency.

[0053] Optionally, the clipping device 10 may also be used to treat tricuspid regurgitation.

[0054] For example, the two clamping structures 30 provided on the base 20 can be used to clamp any two valves of the tricuspid valve respectively.

[0055] In another embodiment, the clipping device 10 may also include three clipping structures 30 disposed around the base 20 to clip each valve of the tricuspid valve respectively.

[0056] In this embodiment, the positioning angles of the clamping structures 30 in the clamping state or the non-clamping state relative to the base 20 may be the same or different (details will be described later).

[0057] Optionally, the clamping structure 30 may include an outer clamping arm 32 and a linkage arm 34 .

[0058] In this embodiment, the outer clamping arm 32 is pivotally connected to the clamping seat 22 , and the linkage arm 34 is pivotally connected to the outer clamping arm 32 and the core shaft 24 .

[0059] Optionally, the top end of each outer clamping arm 32 of each clamping structure 30 may be coaxially pivoted to the clamping seat 22. However, the present invention is not limited thereto, and the top end of each outer clamping arm 32 may also be non-coaxially pivoted to the clamping seat 22 (not shown).

[0060] Optionally, opposite ends of the linkage arm 34 may be pivotally connected to the end of the core shaft 24 (eg, the bottom end of the core shaft 24 as shown in the drawings) and the middle portion of the outer clamping arm 32 , respectively.

[0061] In this embodiment, when the core shaft 24 moves axially relative to the clamping seat 22 , the outer clamping arm 32 can be driven to pivot relative to the clamping seat 22 via the linkage arm 34 .

[0062] In this embodiment, the outer clamping arm 32 can also apply a reverse force to the linkage arm 34 to cause the linkage arm 34 to be elastically bent and deformed, so that the outer clamping arm 32 is in a desired position relative to the clamping seat 22 .

[0063] For example, when the pivot angle of the outer clamp arm 32 relative to the base 20 exceeds a preset minimum pivot angle, the outer clamp arm 32 can apply a reverse force to the linkage arm 34 to cause the linkage arm 34 to bend and deform, thereby preventing the outer clamp arm 32 from excessively pivoting relative to the base 20.

[0064] In this embodiment, the clamping structure 30 further includes an inner clamping arm 36 (refer to Figure 1 、 Figure 3 ), which can be pivotally connected to the outer clamping arm 32 or the clamping seat 22.

[0065] The inner clamping arm 36 can pivot relative to the outer clamping arm 32 so that the clamping structure 30 can be switched between a clamped state and a non-clamped state.

[0066] Specifically, when the clamping structure 30 is in the clamped state, the inner clamping arms 36 and the outer clamping arms 32 can cooperate with each other to clamp the target tissue (such as the mitral valve or tricuspid valve mentioned above).

[0067] In this embodiment, the outer clamping arm 32 may include an arc-shaped blade, and the inner clamping arm 36 may include an elastic band 362 .

[0068] Optionally, the clamping structure 30 may include an inner clamp arm anti-detachment portion 364 provided on the inner clamp arm 36 .

[0069] In this embodiment, the inner clamp arm anti-detachment portion 364 is, for example, at least one barb provided on the elastic band 362 and extending toward the arc-shaped blade 322 (outer clamp arm 32 ).

[0070] Optionally, the clamping structure 30 may include an outer clamping arm anti-detachment portion 324 provided on the outer clamping arm 32 .

[0071] In this embodiment, the outer clamp arm anti-slip portion 324 is, for example, at least one anti-slip groove provided on the arc-shaped blade 322 .

[0072] When the clamping structure 30 is in the clamping state, the inner clamping arm anti-detachment portion 364 and / or the outer clamping arm anti-detachment portion 324 can prevent the target tissue from falling off from between the outer clamping arm 32 and the inner clamping arm 36, thereby ensuring that the target tissue is firmly clamped between the outer clamping arm 32 and the inner clamping arm 36.

[0073] The locking structure 40 is disposed on the base 20 and can be switched between a locked state and an unlocked state to allow or restrict the pivoting of each clamping structure 30 relative to the base 20 .

[0074] In this embodiment, when the locking structure 40 is in the locked state (refer to Figure 1 、 Figure 2 The state shown in FIG2 ) can limit the axial movement of the core shaft 24 relative to the clamping seat 22, thereby limiting the pivoting of the clamping structure 30 relative to the clamping seat 22; when the locking structure 40 is in the unlocked state (reference Figure 3 、 Figure 4 ), the core shaft 24 is allowed to move axially relative to the clamping seat 22 to allow the clamping structure 30 to pivot relative to the clamping seat 22.

[0075] Optionally, the locking structure 40 includes a locking member 42 and an adjusting member 44 .

[0076] Among them, the locking member 42 is separately provided on the clamping seat 22 and the core shaft 24, wherein the locking member 42 can be elastically deformed under a force state to allow the core shaft 24 to move relative to the clamping seat 22, and the locking member 42 can be elastically restored under an unforced state to limit the movement of the core shaft 24 relative to the clamping seat 22.

[0077] In this embodiment, the locking member 42 includes a plurality of positioning grooves 422 spaced apart along the axial direction of the core shaft 24 and two locking teeth 424 symmetrically arranged on the clamping seat 22 (refer to Figure 2 、 Figure 4 ).

[0078] Furthermore, the adjusting member 44 is disposed on the core shaft 24 and is movable relative to the clamping seat 22 to apply a force to the locking member 42 or release the force applied to the locking member 42 .

[0079] For example, the adjusting member 44 may be movably disposed on the core shaft 24 and may move along the axial direction of the core shaft 24 to apply a force to the locking member 42 or release the force applied to the locking member 42 .

[0080] Specifically, the adjusting member 44 can be moved relative to the core shaft 24 in a direction close to the clamping seat 22 by an external force, so as to apply a thrust to each locking tooth 424, so that each locking tooth 424 is elastically deformed and disengaged from the positioning groove 422, thereby allowing the core shaft 24 to move relative to the clamping seat 22 (refer to Figure 3 and Figure 4), thereby providing the clamping structure 30 (such as the outer clamping arm 32) with respect to the base 20 to adjust the pivot angle of the clamping structure 30 with respect to the base 20.

[0081] In this embodiment, the clamping device 10 may include a driving member 50 connected to the adjusting member 44, and the driving member 50 can apply a force to the adjusting member 44 to move the adjusting member 44 relative to the core shaft 24 in a direction close to the clamping seat 22, so that the locking member 42 is elastically deformed, and the locking structure 40 is switched to an unlocked state.

[0082] In this embodiment, the driving member 50 is, for example, a pull rope connected to the adjusting member 44 , but is not limited thereto. Other structural designs may also be used, and this application does not impose any limitation thereto.

[0083] Furthermore, when the external force is released (for example, when the force applied to the driving member 50 is released), the adjusting member 44 can be affected by the elastic restoring force of the locking teeth 424 and move relative to the core shaft 24 in a direction away from the clamping seat 22, thereby releasing the thrust applied to each locking tooth 424, so that each elastically restored locking tooth 424 is engaged with the positioning groove 422 of the core shaft 24, thereby limiting the movement of the core shaft 24 relative to the clamping seat 22 (refer to FIG. Figure 1 and Figure 2 ), thereby limiting the pivoting of the clamping structure 30 (eg, the outer clamping arm 32 ) relative to the base 20 to position the pivoting angle of the clamping structure 30 relative to the base 20 .

[0084] In another embodiment, the adjusting member 44 can be moved relative to the core shaft 24 in a direction approaching the clamping seat 22 by a first external force to apply a thrust to each locking tooth 424, so that each locking tooth 424 is elastically deformed and disengaged from the positioning groove 422, thereby allowing the core shaft 24 to move relative to the clamping seat 22, or the adjusting member 44 can be moved relative to the core shaft 24 in a direction away from the clamping seat 22 by a second external force (for example, the second external force is opposite to the direction of action of the first external force) to release the thrust applied to each locking tooth 424, so that each locking tooth 424 is elastically restored and engaged in the positioning groove 422 to limit the movement of the core shaft 24 relative to the clamping seat 22.

[0085] In summary, the clamping device of the present application flexibly adjusts the pivot angle of each clamping structure relative to the base, thereby adjusting the spacing distance between each target tissue (such as the mitral valve or tricuspid valve) clamped in each clamping structure, thereby improving the success rate of heart leaflet repair treatment.

[0086] Furthermore, the design of the linkage arm that can generate elastic bending deformation can ensure that the clamping structure (outer clamping arm) is always maintained in the expected position relative to the base (such as the clamping base) to prevent the clamping structure from excessively pivoting relative to the base.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, and not to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A clamping device, characterized in that: include: base; At least two clamping structures, which are provided on the base and are pivotable relative to the base, each of the clamping structures being switchable between a clamped state and a non-clamped state; as well as a locking structure disposed on the base and switchable between a locked state and an unlocked state to allow or restrict each of the clamping structures from pivoting relative to the base; The base includes a clamping seat and a core shaft passing through the clamping seat; The clamping structure includes an outer clamping arm and a linkage arm; Wherein, the outer clamping arm is pivotally connected to the clamping seat, and the linkage arm is pivotally connected to the outer clamping arm and the core shaft respectively; Wherein, when the core shaft moves axially relative to the clamping seat, the outer clamping arm can be driven to pivot relative to the clamping seat via the linkage arm; The opposite ends of the linkage arm are pivotally connected to the end of the core shaft and the middle section of the outer clamping arm respectively; The linkage arm is elastic, and the outer clamping arm can apply a reverse force to the linkage arm to cause the linkage arm to be elastically bent and deformed, so that the outer clamping arm is in an expected position relative to the clamping seat.

2. The clamping device according to claim 1, characterized in that When the locking structure is in the locked state, the core shaft can be restricted from axially moving relative to the clamping seat, so as to restrict the clamping structure from pivoting relative to the clamping seat; When the locking structure is in the unlocked state, the spindle may be allowed to move axially relative to the clamping seat to allow the clamping structure to pivot relative to the clamping seat.

3. The clamping device according to claim 2, characterized in that: The locking structure comprises: a locking member, which is separately provided on the clamping seat and the core shaft, wherein the locking member can be elastically deformed when under force to allow the core shaft to move relative to the clamping seat, and the locking member can be elastically restored when not under force to limit the movement of the core shaft relative to the clamping seat; An adjusting member is provided on the core shaft and is movable relative to the clamping seat so as to apply a force to the locking member or release the force applied to the locking member.

4. The clamping device according to claim 3, characterized in that The locking member includes a plurality of positioning grooves spaced apart along the axial direction of the core shaft and two locking teeth symmetrically arranged on the clamping seat; wherein, The adjusting member can be moved relative to the core shaft in a direction close to the clamping seat by an external force, so as to apply a thrust force to each of the locking teeth, so that each of the locking teeth is elastically deformed and disengaged from the positioning groove, thereby allowing the core shaft to move relative to the clamping seat; When the external force is released, the adjusting member can be moved relative to the core shaft in a direction away from the clamping seat under the action of the elastic restoring force of the locking teeth to release the thrust force applied to each locking tooth, so that the elastically restored locking teeth are engaged in the positioning groove to limit the movement of the core shaft relative to the clamping seat.

5. The clamping device according to claim 4, characterized in that: The clamping device further includes a driving member connected to the adjusting member, so that the driving member applies a force to the adjusting member to move the adjusting member relative to the core shaft in a direction close to the clamping seat.

6. The clamping device according to claim 3, characterized in that: The locking member includes a plurality of positioning grooves spaced apart along the axial direction of the core shaft and two locking teeth symmetrically arranged on the clamping seat; wherein, The adjusting member can be moved relative to the core shaft in a direction close to the clamping seat by a first external force, so as to apply a thrust force to each locking tooth, so that each locking tooth is elastically deformed and disengaged from the positioning groove, thereby allowing the core shaft to move relative to the clamping seat; or The adjusting member can be moved relative to the core shaft in a direction away from the clamping seat under the action of a second external force to release the thrust force applied to each locking tooth, so that each locking tooth elastically recovers and is engaged in the positioning groove to limit the movement of the core shaft relative to the clamping seat.

7. The clamping device according to claim 1, characterized in that: The clamping structure further includes an inner clamping arm, which is pivotally connected to the outer clamping arm or the clamping seat; The inner clamping arm can pivot relative to the outer clamping arm so that the clamping structure can switch between the clamping state and the non-clamping state.

8. The clamping device according to claim 7, characterized in that The outer clamping arm comprises an arc-shaped blade, and the inner clamping arm comprises an elastic band.

9. The clamping device according to claim 8, characterized in that The clamping structure further includes an inner clamping arm anti-slip portion provided on the inner clamping arm and / or an outer clamping arm anti-slip portion provided on the outer clamping arm.

10. The clamping device according to claim 8, characterized in that The inner clamp arm anti-slip portion includes a barb provided on the elastic band and extending toward the arc-shaped blade; The outer clamp arm anti-slip portion includes an anti-slip groove provided on the arc-shaped blade.

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