Clamping equipment

Abstract

The present application provides a clamping device, which mainly includes a locking structure that can be switched between a locked state and an unlocked state, and a connecting locking structure that can be linked with the switching of the locking structure to adjust the clamping angles formed by each clamping structure, wherein the clamping angles formed by each clamping structure can be adjusted so that each clamping structure can clamp or release each target tissue; wherein, when the locking structure is in the locked state, a continuous thrust force can be applied to each clamping structure so that the clamping angles formed by each clamping structure are maintained to a minimum, thereby clamping each target tissue. In this way, the clamping device of the present application can provide a stable and reliable clamping force and can be suitable for clamping target tissues of different thicknesses.

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] A common ailment of the mitral, tricuspid, aortic, and pulmonary valves is valvular insufficiency. For example, during systole, a portion of the blood in the left ventricle flows back through the insufficiency of the mitral valve into the left atrium. The left atrium receives both this regurgitated blood and blood from the pulmonary veins, significantly increasing blood volume and pressure in the left atrium, leading to left atrial hypertrophy.

[0003] During cardiac diastole, more blood flows from the left atrium to the left ventricle, causing the left ventricle to hypertrophy due to enhanced contraction. After evolving from the compensatory period to the decompensated period, both the left atrium and the left ventricle suffer from heart failure, followed by pulmonary congestion, pulmonary hypertension, right ventricular hypertrophy, right atrial hypertrophy, right heart failure, and systemic congestion.

[0004] Traditional treatment options include aggressive surgery or palliative medication to combat inevitable heart failure. Surgical options also include valve replacement and valvuloplasty. Among these surgical options, typical open-chest surgery is highly invasive, requiring extracorporeal circulation and carrying a high complication rate and infection risk. Many patients cannot tolerate the significant surgical risks and are left helplessly awaiting death.

[0005] Current transcatheter treatments for mitral and tricuspid regurgitation often require altering the heart's structure during the healing process, creating significant stress and discomfort after heart surgery. Therefore, a minimally invasive treatment approach that eliminates the need for altering the heart's structure is urgently needed. Summary of the Invention

[0006] In view of the above problems, the present application provides a clamping instrument that can provide reliable clamping force and is suitable for clamping target tissues of different types.

[0007] The present application provides a clamping device, which includes a locking structure, which can be switched between a locked state and an unlocked state; and a plurality of clamping structures, each of which is respectively connected to the locking structure and can be linked with the switching actuation of the locking structure to adjust the clamping angles formed by each of the clamping structures; wherein, by adjusting the clamping angles formed by each of the clamping structures, each of the clamping structures can clamp or release each target tissue; and wherein, when the locking structure is in the locked state, the locking structure can apply a continuous thrust to each of the clamping structures, so that the clamping angles formed by each of the clamping structures are maintained to a minimum, thereby clamping each of the target tissues.

[0008] Optionally, each of the clamping structures is used to clamp a target tissue; the target tissue includes a heart valve.

[0009] Optionally, the clamping device also includes a core shaft, and the locking structure includes a clamping seat and an adjustment seat coaxially arranged on the core shaft, and each of the clamping structures is respectively connected to the clamping seat and the adjustment seat; wherein, when the locking structure gradually switches from the non-locking state to the locking state, the spacing distance between the clamping seat and the adjustment seat gradually decreases, and the pivot angle between each of the clamping structures and the core shaft gradually decreases.

[0010] Optionally, the clamping seat is movably provided on the core shaft and can reciprocate along the axial direction of the core shaft; the adjusting seat is fixed on the core shaft.

[0011] Optionally, the locking structure further includes a first latch and a second latch respectively provided on the clamping seat and the adjustment seat; wherein, the first latch and the second latch can be engaged with each other to maintain the locking structure in the locking state; and wherein, after the first latch and the second latch are engaged with each other, at least a portion of the core shaft can be left in the clamping device, or the core shaft can be completely withdrawn from the clamping device.

[0012] Optionally, each of the clamping structures includes a main clamping arm, an auxiliary clamping arm and an elastic arm; the main clamping arm and the auxiliary clamping arm are respectively pivoted to the clamping seat, and the opposite ends of the elastic arm are respectively pivoted to the adjustment seat and the main clamping arm; wherein, when the locking structure performs the switching action between the locking state and the unlocking state, the spacing distance between the clamping seat and the adjustment seat can be increased or decreased, so as to drive each of the main clamping arms to pivot relative to the clamping seat via the elastic arm; when the locking structure is maintained in the locking state, a continuous elastic thrust can be applied to each of the main clamping arms via each of the elastic arms to prompt each of the main clamping arms to pivot relative to the clamping seat toward the auxiliary clamping arm, so that the clamping angle formed between the main clamping arm and the auxiliary clamping arm is maintained to be minimized.

[0013] Optionally, when the locking structure is in the locking state, the main clamping arm may apply a reverse force to the elastic arm according to the thickness of the target tissue, so that the elastic arm undergoes different degrees of elastic deformation until the elastic thrust of the elastic arm and the reverse force of the main clamping arm reach a balance.

[0014] Optionally, the elastic arm includes at least one of an arched bending portion, an S-shaped bending portion, and a Z-shaped bending portion.

[0015] Optionally, each of the main clamping arms and / or the auxiliary clamping arms may be coaxially pivoted or non-coaxially pivoted to the clamping seat.

[0016] Optionally, the auxiliary clamp arm can be elastically deformed under a force state to pivot relative to the clamping seat in a direction away from the main clamp arm, so that the clamping angle formed between the auxiliary clamp arm and the main clamp arm is increased; the auxiliary clamp arm can be elastically restored under a non-force state to pivot relative to the clamping seat in a direction close to the main clamp arm, so that the clamping angle formed between the auxiliary clamp arm and the main clamp arm is reduced.

[0017] Optionally, the auxiliary clamping arm includes a clamping portion and a pivoting portion, and the clamping portion can be pivotally connected to the core shaft or the clamping seat via the pivoting portion; the pivoting portion can elastically deform under a force state and elastically recover under a non-force state, so that the clamping portion can pivot relative to the clamping seat.

[0018] Optionally, each of the auxiliary clamping arms is an integrated structure or a separate structure.

[0019] It can be seen from the above technical solutions that the clamping device of the embodiment of the present application applies a continuous thrust force to the clamping structure by means of the locking structure in a locked state, so that the clamping angle formed by each clamping structure is minimized, so that the clamping structure maintains a reliable and stable clamping force.

[0020] Furthermore, the clamping device of the embodiment of the present application can also apply a reverse force to the elastic arm according to the thickness of the target tissue when the locking structure is in the locking state, so that the elasticity produces different degrees of elastic deformation until the elastic thrust of the elastic arm and the reverse force of the main clamping arm reach a balance. Through this structural design, the clamping structure can be suitable for clamping target tissues of different thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1A to Figure 1B Schematic diagram of the three-dimensional structure of different embodiments of the clamping device of the present application.

[0023] Figure 2 This is a schematic diagram of the exploded structure of the clamping device of this application.

[0024] Figure 3 and Figure 4Schematic diagrams of the structure of the clamping device of the present application in the unlocked state and the locked state respectively.

[0025] Figure 5 and Figure 6 Side cross-sectional views of the locking structure of the clamping device of the present application in the unlocked state and the locked state respectively.

[0026] Figure 7 and Figure 8 They are partial schematic diagrams of the adjustment seat and the clamping seat of the present application respectively.

[0027] Figure 9 and Figure 10 They are respectively partial schematic diagrams of the auxiliary clamping arms of the present application.

[0028] Figure 11 and Figure 12 They are schematic diagrams of different embodiments of the clamping device of the present application.

[0029] Figures 13 to 17 This is a schematic diagram of an embodiment of performing a heart valve repair surgery using the clamping instrument of the present application.

[0030] Component number 10: clamping device; 20: mandrel;

[0031] 22: Connection interface: 30: Locking structure;

[0032] 32: clamping seat;

[0033] 322: pivot axis;

[0034] 324: wear groove;

[0035] 34: Adjustment seat;

[0036] 342: pivot hole;

[0037] 36: first fastener; 38: second fastener; 40: clamping structure;

[0038] 42: Main clamp arm;

[0039] 422: Top pivot hole; 424: Middle pivot hole; 44: Elastic arm; 442: First pivot hole; 444: Second pivot hole; 46: Auxiliary clamping arm; 462: Clamping portion;

[0040] 464: Pivot joint.

[0041] 466: Wearing Department;

[0042] 52: pivot axis;

[0043] 54: pivot axis;

[0044] 60: target organization;

[0045] 70: conveying system;

[0046] 80: Pull the wire. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] like Figures 1A to 6 As shown, the clamping device 10 of the present application mainly includes a locking structure 30 and a plurality of clamping structures 40 .

[0051] The locking structure 30 can be switched between a locking state and an unlocking state.

[0052] Each clamping structure 40 is connected to the locking structure 30 and can be linked with the switching actuation of the locking structure to adjust the clamping angles formed by each clamping structure 40 .

[0053] In this embodiment, each clamping angle formed by each clamping structure 40 can be adjusted so that each clamping structure 40 can clamp or release each target tissue.

[0054] In this embodiment, when the locking structure 30 switches from the unlocked state to the locked state (ie, from the state shown in FIG. 1 to the locked state), Figure 4 (When the state shown is switched), the clamping angle formed by each clamping structure 40 gradually decreases.

[0055] In this embodiment, when the locking structure 30 is in the locked state, the locking structure 30 can apply a continuous push force to each clamping structure 40 to minimize the clamping angle formed by each clamping structure 40, thereby providing each clamping structure 40 with a stable clamping force to clamp each target tissue (i.e. Figure 4 、 Figure 6 status shown).

[0056] Optionally, the target tissue is, for example, a heart valve, including but not limited to the mitral valve, the tricuspid valve, etc.

[0057] Optionally, the clamping device 10 may further include a core shaft 20 (see Figure 1B ), the locking structure 30 may include a clamping seat 32 and an adjusting seat 34 coaxially arranged on the core shaft 20, wherein each clamping structure 40 is connected to the clamping seat 32 and the adjusting seat 34 respectively.

[0058] Specifically, when the locking structure 30 gradually switches from the unlocked state to the locked state, the spacing between the clamping seat 32 and the adjustment seat 34 gradually decreases, so that the pivot angle between each clamping structure 40 and the core shaft 20 gradually decreases. That is, the free end of the clamping structure 40 moves toward the direction close to the core shaft 20 (refer to Figure 6 On the contrary, when the locking structure 30 gradually switches from the locked state to the unlocked state, the distance between the clamping seat 32 and the adjustment seat 34 gradually increases, so that the pivot angle between each clamping structure 40 and the core shaft 20 gradually increases, that is, the free end of the clamping structure 40 moves in the direction away from the core shaft 20 (refer to Figure 5 status shown).

[0059] Optionally, the clamping seat 32 can be movably provided on the core shaft 20 (for example, can be movably passed through the core shaft 20), and the adjustment seat 34 can be fixedly provided at the end of the core shaft 20. The distance between the clamping seat 32 and the adjustment seat 34 can be adjusted by the axial reciprocating movement of the clamping seat 32 along the core shaft 20, thereby driving the clamping structure 40 to pivot relative to the core shaft 20.

[0060] Optionally, the locking structure 30 may further include a first latch 36 and a second latch 38 respectively disposed on the clamping seat 32 and the adjusting seat 34 (see Figure 7 and Figure 8 ).

[0061] In this embodiment, the first locking member 36 and the second locking member 38 can be engaged with each other to maintain the locking structure 30 in a locked state.

[0062] In this embodiment, the first latching member 36 may include two hooks disposed on opposite sides of the adjustment seat 34, and the second latching member 38 may include two slots disposed on opposite sides of the clamping seat 32. However, this is not limiting, and the first latching member 36 and the second latching member 38 may also be implemented using other engaging structures, which is not limited in this application.

[0063] In this embodiment, the core shaft 20 is designed as a detachable structure, which is mainly used to provide axial positioning between the clamping seat 32 and the adjustment seat 34 during the clamping process of the clamping instrument 10 performing the target tissue clamping, so as to facilitate the position alignment and clamping operation between the first clamping member 36 and the second clamping member 38.

[0064] In this embodiment, after the first latch 36 and the second latch 38 are engaged with each other, the core shaft 20 can be completely removed from the clamping device 10 according to actual use requirements (refer to FIG. Figure 1A Alternatively, the mandrel 20 may be completely retained in the clamping device 10 to further improve the clamping stability of the clamping device 10 (see FIG. Figure 1B status shown).

[0065] In one embodiment, the core shaft 20 can be designed as a component fixed in the clamping device 10 .

[0066] In another embodiment, a portion of the conveying system can also be used as the core shaft 20 of the clamping device 10 to assist the clamping device 10 in performing the clamping operation of the target tissue. After completing the clamping operation of the target tissue, the core shaft 20 can be separated from the clamping device 10 and removed together with the conveying system.

[0067] In this embodiment, when the core shaft 20 is designed to be a component fixed in the clamping device 10, a connection interface 22 can also be designed on the core shaft 20 so that the clamping device 10 can be detachably connected to the delivery system (refer to the following about Figures 13 to 17 Detailed description of the .

[0068] Optionally, each clamping structure 40 includes a main clamping arm 42 , an elastic arm 44 , and an auxiliary clamping arm 46 .

[0069] In this embodiment, each main clamping arm 42 and each auxiliary clamping arm 46 can be pivotally connected to the clamping base 32 , and opposite ends of each elastic arm 44 are pivotally connected to the adjustment base 34 and the main clamping arm 42 , respectively.

[0070] See also Figure 2 In this embodiment, the top pivot hole 422 of each main clamping arm 42 is pivoted to the pivot shaft 322 of the clamping seat 32, and the opposite ends of each elastic arm 44 are respectively provided with a first pivot hole 442 and a second pivot hole 444, wherein the first pivot hole 442 of the elastic arm 44 is pivoted to the middle pivot hole 424 of the main clamping arm 42 via the pivot shaft 52, and the second pivot hole 444 of the elastic arm 44 is pivoted to the pivot hole 342 of the adjustment seat 34 via the pivot shaft 54.

[0071] In this embodiment, when the locking structure 30 switches between the locked state and the unlocked state, the distance between the clamping seat 32 and the adjustment seat 34 coaxially arranged on the core shaft 20 can be increased or decreased. When the distance between the clamping seat 32 and the adjustment seat 34 is reduced, the elastic arm 44 can drive each main clamping arm 42 to pivot relative to the clamping seat 32, so that each pivot angle between each main clamping arm 42 and the core shaft 20 gradually decreases (refer to Figure 6 On the contrary, when the distance between the clamping seat 32 and the adjustment seat 34 gradually increases, the elastic arm 44 can drive each main clamping arm 42 to pivot relative to the clamping seat 32, so that each pivot angle between each main clamping arm 42 and the core shaft 20 gradually increases (refer to Figure 5 status shown).

[0072] Furthermore, when the locking structure 30 is maintained in the locked state, a continuous elastic thrust can be applied to each main clamping arm 42 through each elastic arm 44, so as to prompt each main clamping arm 42 to pivot relative to the clamping seat 32 toward the auxiliary clamping arm 46, so that the clamping angle formed between the main clamping arm 42 and the auxiliary clamping arm 46 is maintained to a minimum. Through this structural design, the clamping device 10 of the present application can provide a long-lasting, stable and reliable clamping force, which can effectively improve the success rate of heart valve repair surgery.

[0073] In addition, when the locking structure 30 is in the locked state, the main clamping arm 42 can also apply a reverse force to the elastic arm 44 according to the thickness of the target tissue it clamps, so that the elastic arm 44 produces different degrees of elastic deformation until the elastic thrust of the elastic arm 44 and the reverse force of the main clamping arm 42 reach a balance.

[0074] That is to say, when the locking structure 30 is in the locked state, the main clamping arm 42 and the elastic arm 44 can be adaptively adjusted according to the actual thickness of the target tissue currently clamped, so that different minimum pivot angles are formed between each main clamping arm 42 and the core shaft 20. This design not only provides the clamping device 10 of the present application with the ability to clamp target tissues of different thicknesses, but also ensures that target tissues of various thicknesses can be effectively clamped, thereby further improving the success rate of heart valve repair surgery.

[0075] In this embodiment, the elastic arm 44 includes an S-shaped bending portion (refer to FIG. 1 to FIG. Figure 6 ), arched bend (reference Figure 11 ) or Z-bend (reference Figure 12 ).

[0076] In other embodiments, the elastic arm 44 may also be implemented by a spring structure (not shown).

[0077] Optionally, the elastic arm 44 may be made of nickel-titanium alloy material, but is not limited thereto. It may also be made of other elastic materials, which is not limited in this application.

[0078] Optionally, each main clamping arm 42 of each clamping structure 40 may be connected to the clamping seat 32 in a coaxial pivoting manner or a non-coaxial pivoting manner.

[0079] In this embodiment, the auxiliary clamp arm 46 and the main clamp arm 42 can independently pivot relative to the clamping base 32 to adjust the clamping angle formed between the auxiliary clamp arm 46 and the main clamp arm 42 to clamp or release the target tissue (such as a heart valve).

[0080] Optionally, the auxiliary clamp arm 46 can be elastically deformed under stress so as to pivot relative to the clamping seat 32 in a direction away from the main clamp arm 42, so that the clamping angle formed between the auxiliary clamp arm 46 and the main clamp arm 42 is increased; the auxiliary clamp arm 46 can also elastically recover under no stress so as to pivot relative to the clamping seat 32 in a direction close to the main clamp arm 42, so that the clamping angle formed between the auxiliary clamp arm 46 and the main clamp arm 42 is reduced.

[0081] Optionally, the auxiliary clamping arm 46 may include a clamping portion 462 and a pivoting portion 464 , wherein the clamping portion 462 may be pivotally connected to the clamping seat 32 via the pivoting portion 464 .

[0082] Optionally, each auxiliary clamping arm 46 of each clamping structure 40 may be designed as an integrated structure or a separate structure.

[0083] For example, Figure 2 、 Figure 9 and Figure 10 In the embodiment shown, each auxiliary clamping arm 46 of each clamping structure 40 is an integral design structure. Each auxiliary clamping arm 46 can be inserted into the core shaft 20 through the insertion portion 466, and each clamping portion 462 of each auxiliary clamping arm 46 can extend outward through each insertion slot 324 of the clamping seat 32 and pivot relative to the clamping seat 32 using each insertion slot 324 as a rotation axis (refer to FIG. Figure 2 、 Figure 8 ).

[0084] It should be noted that the configuration of the auxiliary clamping arm 46 is not limited to that shown in the drawings of this application. Those skilled in the art may adopt any other equivalent design scheme based on the technical inspiration of this application, and this application does not impose any restrictions on this.

[0085] In this embodiment, the pivot portion 464 can be elastically deformed under a force state so that the clamping portion 462 can pivot relative to the clamping seat 32 in a direction away from the main clamping arm 42, thereby increasing the clamping angle between the main clamping arm 42 and the auxiliary clamping arm 46 (clamping portion 462); alternatively, the pivot portion 464 can also elastically recover under a non-force state so that the clamping portion 462 can pivot relative to the clamping seat 32 in a direction close to the main clamping arm 42, thereby reducing the clamping angle between the main clamping arm 42 and the auxiliary clamping arm 46 (clamping portion 462) to clamp the target tissue.

[0086] Please refer to Figure 5 and Figure 6 In this embodiment, the free end of the auxiliary clamp arm 46 can be connected to a driving member (such as a pull wire 80), and the free end of the auxiliary clamp arm 46 can be pulled by the driving member to cause the pivot portion 464 of the auxiliary clamp arm 46 to be elastically deformed (refer to Figure 10 ), so that the clamping portion 462 pivots relative to the clamping seat 32, so that the clamping angle between the auxiliary clamping arm 46 and the main clamping arm 42 increases. Alternatively, by releasing the driving member, the pivoting portion 464 of the auxiliary clamping arm 46 is elastically restored (refer to Figure 9 ), so that the clamping portion 462 can pivot relative to the clamping seat 32, thereby reducing the clamping angle between the auxiliary clamping arm 46 and the main clamping arm 42.

[0087] The following will be referred to Figures 13 to 17 The following describes an exemplary method of using the clamping instrument 10 of the present application to perform heart valve repair treatment.

[0088] The clamping device 10 is delivered to the vicinity of the target tissue 60 (eg, heart valve) to be repaired by the delivery system 70 (see Figure 13 ).

[0089] The conveying system 70 controls the adjustment seat 34 of the clamping instrument 10 to move in the distal direction relative to the clamping seat 32, so that the spacing distance between the adjustment seat 34 and the clamping seat 32 increases, and then the elastic arm 44 drives the main clamping arm 42 to pivot and open relative to the clamping seat 32, that is, the pivot angle between the main clamping arm 42 and the core shaft 20 increases, and a pulling force is applied to the auxiliary clamping arm 46 by, for example, a pull line 80 connected to the auxiliary clamping arm 46 to keep the auxiliary clamping arm 46 close to the opposite sides of the core shaft 20, so that the clamping angle between the main clamping arm 42 and the auxiliary clamping arm 46 is maintained large enough, thereby providing the target tissue 60 to be repaired (such as a heart valve) to be positioned between the main clamping arm 42 and the auxiliary clamping arm 46 (refer to FIG. Figure 14 ).

[0090] By releasing the pull wire 80, the auxiliary clamp arm 46 is pivoted relative to the clamp seat 32 toward the main clamp arm 42 under the action of the elastic restoring force, so that the target tissue 60 (such as a heart valve) is clamped between the main clamp arm 42 and the auxiliary clamp arm 46 (refer to FIG. Figure 15 ).

[0091] It should be noted that during this operation, if the clamping position of the target tissue 60 is not ideal, the auxiliary clamping arm 46 can be pulled again by the pull wire 80 to release the target tissue 60 clamped between the auxiliary clamping arm 46 and the main clamping arm 42, and recapture the target tissue 60 until the clamping state of the target tissue 60 meets expectations.

[0092] The conveying system 70 controls the adjustment seat 34 of the clamping device 10 to move in the proximal direction relative to the clamping seat 32, so that the spacing distance between the adjustment seat 34 and the clamping seat 32 is reduced, and then the elastic arm 44 drives the main clamping arm 42 to pivot in the opposite direction relative to the clamping seat 32, so that the pivot angle between the main clamping arm 42 and the core shaft 20 gradually decreases, and drives the auxiliary clamping arm 46 to gradually move closer to the direction of the core shaft 20 until the adjustment seat 34 and the clamping seat 32 are engaged with each other, that is, the locking structure 30 is in a locked state.

[0093] Under ideal conditions, when the locking structure 30 is in this locking state, the auxiliary clamping arm 46 will be tightly pressed against the clamping seat 32 by the resistance force of the main clamping arm 42. At the same time, the main clamping arm 42 can also apply a reverse force to the elastic arm 44 according to the different thicknesses of the target tissue 60 to be clamped, so that the elastic arm 44 produces different degrees of elastic deformation until the elastic resistance force applied by the elastic arm 44 to the main clamping arm 42 and the reverse force applied by the main clamping arm 42 to the elastic arm 44 reach a balance, thereby ensuring that the target tissue 60 can be stably and firmly clamped between the main clamping arm 42 and the auxiliary clamping arm 46.

[0094] The delivery system 70 and the clamping device 10 are separated from each other to withdraw the delivery system 70 while leaving only the clamping device 10 in the patient's body, thereby completing the clamping operation of the target tissue 60 (eg, a heart valve).

[0095] In summary, the clamping device provided in the present application applies a continuous thrust force to the clamping structure by means of the locking structure in a locked state, so as to minimize the clamping angle formed by each clamping structure, so that the clamping structure can maintain a stable and reliable clamping force, thereby improving the clamping effect and increasing the success rate of mitral and tricuspid valve regurgitation treatment surgery.

[0096] Furthermore, the main clamping arm of the clamping structure can also apply a reverse force to the elastic arm according to the actual thickness of the target tissue it clamps, so as to cause the elastic arm to produce different degrees of elastic deformation until the elastic thrust of the elastic arm and the reverse force of the main clamping arm reach a balance, thereby being suitable for clamping target tissues of different thicknesses.

[0097] 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: A locking structure that can be switched between a locked state and an unlocked state; as well as A plurality of clamping structures, each of the clamping structures being connected to the locking structure and being capable of being linked with the switching actuation of the locking structure to adjust the clamping angles formed by each of the clamping structures; Wherein, each clamping angle formed by each clamping structure is adjusted so that each clamping structure can clamp or release each target tissue; When the locking structure is in the locked state, the locking structure can apply a continuous thrust to each of the clamping structures, so that each of the clamping angles formed by each of the clamping structures is kept to a minimum, thereby clamping each of the target tissues, wherein the target tissue includes a heart valve; The locking structure includes a clamping seat and an adjusting seat, and each of the clamping structures is respectively connected to the clamping seat and the adjusting seat; Each of the clamping structures comprises a main clamping arm, an auxiliary clamping arm and an elastic arm; The main clamping arm and the auxiliary clamping arm are respectively pivotally connected to the clamping seat, and the opposite ends of the elastic arm are respectively pivotally connected to the adjustment seat and the main clamping arm; Wherein, when the locking structure performs the switching action between the locking state and the unlocking state, the spacing distance between the clamping seat and the adjustment seat can be increased or decreased; When the locking structure is maintained in the locking state, a continuous elastic thrust can be applied to each main clamping arm via each elastic arm to prompt each main clamping arm to pivot relative to the clamping seat toward the auxiliary clamping arm, so that the clamping angle formed between the main clamping arm and the auxiliary clamping arm is maintained to a minimum.

2. The clamping device according to claim 1, characterized in that: The target tissue includes a heart valve.

3. The clamping device according to claim 2, characterized in that: The clamping device further comprises a core shaft, the clamping seat and the adjusting seat are coaxially arranged on the core shaft, and each of the clamping structures is respectively connected to the clamping seat and the adjusting seat; When the locking structure gradually switches from the non-locking state to the locking state, the spacing distance between the clamping seat and the adjustment seat gradually decreases, and the pivot angle between each clamping structure and the core shaft gradually decreases.

4. The clamping device according to claim 3, characterized in that: The clamping seat is movably arranged on the core shaft and can reciprocate along the axial direction of the core shaft; the adjusting seat is fixed on the core shaft.

5. The clamping device according to claim 4, characterized in that: The locking structure further includes a first latch and a second latch respectively provided on the clamping seat and the adjusting seat; Wherein, the first latch and the second latch can be engaged with each other to maintain the locking structure in the locked state; And wherein, after the first fastener and the second fastener complete the mutual engagement, at least a portion of the core shaft can be left in the clamping device, or the core shaft can be completely withdrawn from the clamping device.

6. The clamping device according to claim 1, characterized in that When the locking structure is in the locking state, the main clamping arm can apply a reverse force to the elastic arm according to the thickness of the target tissue, so that the elastic arm produces different degrees of elastic deformation until the elastic thrust of the elastic arm and the reverse force of the main clamping arm are balanced.

7. The clamping device according to claim 6, characterized in that: The elastic arm includes at least one of an arched bending portion, an S-shaped bending portion, and a Z-shaped bending portion.

8. The clamping device according to claim 1, characterized in that: Each of the main clamping arms can be coaxially pivoted or non-coaxially pivoted to the clamping seat.

9. The clamping device according to claim 1, characterized in that: The auxiliary clamping arm can be elastically deformed under a force state to pivot relative to the clamping seat in a direction away from the main clamping arm, so as to increase the clamping angle formed between the auxiliary clamping arm and the main clamping arm; The auxiliary clamping arm can elastically recover in a non-stressed state to pivot relative to the clamping seat toward the main clamping arm, so that the clamping angle formed between the auxiliary clamping arm and the main clamping arm becomes smaller.

10. The clamping device according to claim 9, characterized in that The auxiliary clamping arm includes a clamping portion and a pivoting portion, and the clamping portion can be pivotally connected to the clamping seat via the pivoting portion; The pivoting portion can be elastically deformed in a stressed state and elastically restored in a non-stressed state, so that the clamping portion can pivot relative to the clamping seat.

11. The clamping device according to claim 9, characterized in that Each of the auxiliary clamping arms is an integrated structure or a separate structure.

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