Clip instrument and control method therefor

Abstract

A clip instrument and a control method therefor. The clip instrument comprises a delivery apparatus and a plurality of clamping assemblies. The delivery apparatus comprises a sheath provided with a channel. The plurality of clamping assemblies are sequentially arranged in the channel of the sheath. The plurality of clamping assemblies are sequentially releasably connected, and each of the clamping assemblies can be used for clamping tissue.

Description

Clip apparatus and method of controlling the same CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Chinese Patent Application No. 202410866549.2, filed on June 28, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present specification relates to the field of medical devices, and in particular to a clip apparatus and method of controlling the same. BACKGROUND

[0003] In endoscopic hemostasis surgery, for acute bleeding, the clip apparatus used by endoscope can play a quick and effective hemostasis effect. In some cases where there are multiple bleeding points in the body, the clip apparatus needs to provide multiple clamping components for hemostatic clipping to improve operation efficiency and immediate hemostasis capability.

[0004] Although the clip apparatus continuously deploys multiple clamping components for hemostasis, it has obvious advantages in multiple bleeding point scenarios, but there are still many problems in its design, such as: the locking mechanism of the clamping component is unstable, which leads to the problem of unstable hemostasis effect; and the problem of long retention length after the clamping component is released from the delivery part; and the problem of inflexible release process and loading process of the clamping component, etc. Many problems faced by the clip apparatus limit the efficiency and safety of its clinical application.

[0005] In view of this, it is necessary to provide a clip apparatus which has the advantages of fast and flexible loading, stable locking, and minimal retention, to meet the clinical demand for efficient and safe hemostasis tools. SUMMARY

[0006] One or more embodiments of the present specification provide a clip apparatus, comprising: a clamping component, comprising a clamping part and a locking part, the clamping part comprising at least one locked part, the locking part comprising at least one locking part, the at least one locked part being configured to respectively cooperate with the corresponding locking part, the clamping part being locked with the locking part, the distance between the proximal end of the clamping part and the first locked part located at the farthest end of the at least one locked part being less than or equal to the axial length of the locking part.

[0007] One or more embodiments of the present specification provide a clip device, comprising: a clamping assembly comprising a clamping part and a locking part, the locking part being used to lock the clamping part; a sheath tube, a base being arranged at a distal end of the sheath tube, the base being used to mount the clamping assembly, the base comprising an elastic part, the elastic part being releasably connected with the locking part; a limiting part comprising a fixed end and a stop end, the fixed end being fixed with the elastic part, the stop end being releasably connected with the locking part, the limiting part being configured to drive the elastic part to deform radially outward along the base when the limiting part moves radially along the sheath tube under force, so as to release the locking part from the base.

[0008] One or more embodiments of the present specification provide a clip device, comprising: a clamping part comprising two clamping pieces, each of the clamping pieces being provided with a holding part and a narrow part on two sides of the clamping piece, the narrow part being smaller in size than the holding part in a width direction of the clamping piece; an operating arm comprising a butt joint part matched with the clamping piece, the butt joint part comprising a first state and a second state: in the first state, the butt joint part is matched with the holding part, the operating arm being configured to control movement of the at least two clamping pieces; in the second state, the butt joint part is aligned with the narrow part, the operating arm being disengaged from the clamping piece.

[0009] One or more embodiments of the present specification provide a clip device, comprising: a sheath tube comprising a channel; at least two clamping assemblies comprising a clamping part and a locking part, the clamping assemblies being axially movably arranged in the channel of the sheath tube; two operating arms movably arranged at a distal end of the sheath tube, a launch channel being formed between the two operating arms to allow the clamping assemblies to pass through; a first clamping assembly located at a distal end of the at least two clamping assemblies being releasably connected with the operating arms in the launch channel, after the first clamping assembly is released from the operating arms, a second clamping assembly adjacent to the first clamping assembly moves distally and enters the launch channel to be releasably matched with the operating arms.

[0010] One or more embodiments of the present specification provide a clip device, comprising: at least two clamping assemblies; a sheath tube comprising an inner sheath tube and an outer sheath tube, the inner sheath tube being axially movably arranged inside the outer sheath tube, the at least two clamping assemblies being sequentially arranged axially movably in a channel of the sheath tube, a distal end of the inner sheath tube being in abutment with a clamping assembly located at a proximal end of the at least two clamping assemblies; an operating device comprising a first operating handle and a second operating handle, the first operating handle being connected with a proximal end of the inner sheath tube, used to control axial movement of the inner sheath tube relative to the outer sheath tube, thereby driving the at least two clamping assemblies to move as a whole, the second operating handle being configured to control movement of a first clamping assembly located at a distal end of the at least two clamping assemblies.

[0011] One or more embodiments of the present specification provide a control method of a clip instrument, comprising: operating a mandrel to reciprocate along a sheath tube to control two operation arms to open or close, thereby driving a clamping portion to open or close; operating the mandrel to move proximally along the sheath tube to control the clamping portion to cooperate with a locking member and actuate the locking member to release from the sheath tube; and operating the mandrel to move distally along the sheath tube to control the operation arms to release from the clamping portion.

[0012] One or more embodiments of the present specification provide a control method of a clip instrument, comprising: operating a mandrel to reciprocate along a sheath tube to control two operation arms to open or close, thereby driving a clamping portion to open or close; operating the mandrel to move proximally along the sheath tube to control the clamping portion to cooperate with a locking member and actuate the locking member to release from the sheath tube; and operating the mandrel to move distally along the sheath tube to control the operation arms to release from the clamping portion.

[0013] The clip instrument in the embodiments of the present specification has the advantages of fast and flexible loading, stable locking, and minimized retention, to meet the clinical demand for efficient and safe hemostatic tools. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present specification will be further described in the manner of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting, and in these embodiments, the same numbers represent the same structures, in which:

[0015] FIG. 1A is an exemplary structural block diagram of a clip instrument according to some embodiments of the present specification;

[0016] FIG. 1B is a partial enlarged view of region A of the clip instrument according to some embodiments of FIG. 1A;

[0017] FIG. 2 is an exemplary structural schematic diagram of a clip instrument according to an embodiment of the present specification;

[0018] FIG. 3 is an exemplary structural schematic diagram of a clamping portion according to some embodiments of the present specification;

[0019] FIG. 4 is an exemplary structural schematic diagram of a locking member according to some embodiments of the present specification;

[0020] FIG. 5A is an exemplary structural schematic diagram of a clamping assembly in an unlocked state according to some embodiments of the present specification;

[0021] FIG. 5B is an exemplary structural side view of a clamping assembly in an unlocked state according to some embodiments of the present specification;

[0022] FIG. 5C is an exemplary structural side view II of the clamping assembly in the unlocked state, according to some embodiments of the present specification;

[0023] FIG. 5D is a cross-sectional view taken along line A-A of the clamping assembly in the unlocked state, according to some embodiments of FIG. 5C;

[0024] FIG. 6A is an exemplary structural schematic of the clamping assembly in the locked state, according to some embodiments of the present specification;

[0025] FIG. 6B is an exemplary structural side view I of the clamping assembly in the locked state, according to some embodiments of the present specification;

[0026] FIG. 6C is an exemplary structural side view II of the clamping assembly in the locked state, according to some embodiments of the present specification;

[0027] FIG. 6D is a cross-sectional view taken along line B-B of the clamping assembly in the locked state, according to some embodiments of FIG. 6C;

[0028] FIG. 7 is an exemplary structural schematic of the clip instrument, according to embodiment two of the present specification;

[0029] FIG. 8 is an exemplary structural schematic of the base, according to some embodiments of the present specification;

[0030] FIG. 9 is an exemplary structural schematic of the limiting member, according to some embodiments of the present specification;

[0031] FIG. 10A is an exemplary structural schematic of the clamping portion and the base in cooperation, according to some embodiments of the present specification;

[0032] FIG. 10B is an exemplary structural side view I of the clamping portion and the base in cooperation, according to some embodiments of the present specification;

[0033] FIG. 10C is an exemplary structural side view II of the clamping portion and the base in cooperation, according to some embodiments of the present specification;

[0034] FIG. 11 is an exemplary structural schematic of the operating arm, according to some embodiments of the present specification;

[0035] FIG. 12 is an exemplary structural schematic of the mandrel, according to some embodiments of the present specification;

[0036] FIG. 13A is an exemplary structural schematic of the operating arm and the base, according to some embodiments of the present specification;

[0037] FIG. 13B is an exemplary structural side view of the operating arm and the base, according to some embodiments of the present specification;

[0038] Figure 13C is a schematic structural view of the operating arms and the base, with one operating arm hidden, according to some embodiments of the present specification;

[0039] Figure 14 is a schematic structural view of an example of a clip instrument, according to embodiment three of the present specification;

[0040] Figure 15 is a schematic structural view of an example of a clip instrument in an open state, according to some embodiments of the present specification;

[0041] Figure 16A is a schematic structural view of an example of a clip instrument in a closed state, according to some embodiments of the present specification;

[0042] Figure 16B is a partial cross-sectional view one of a clip instrument in a closed state, according to some embodiments of Figure 16A;

[0043] Figure 16C is a partial cross-sectional view two of a clip instrument in a closed state, according to some embodiments of Figure 16A;

[0044] Figure 17A is a schematic structural view of an example of a clip instrument in a locked state, according to some embodiments of the present specification;

[0045] Figure 17B is a partial cross-sectional view one of a clip instrument in a locked state, according to some embodiments of Figure 17A;

[0046] Figure 17C is a partial cross-sectional view two of a clip instrument in a locked state, according to some embodiments of Figure 17A;

[0047] Figure 18 is a schematic structural view of an example of a clip instrument, according to embodiment four of the present specification;

[0048] Figure 19A is a schematic structural view of an example of a clip instrument in a state of being ready to be loaded, according to some embodiments of the present specification;

[0049] Figure 19B is a schematic structural view of an example of a clip instrument in a state of loading being completed, according to some embodiments of the present specification;

[0050] Figure 20A is a schematic structural view of an example of a clip instrument, according to embodiment five of the present specification;

[0051] Figure 20B is a cross-sectional view of the clip instrument of Figure 20A taken along line C-C;

[0052] Figure 21A is a schematic structural view one of a release process and a loading process of a clip instrument, according to some embodiments of the present specification;

[0053] Figure 21B is a schematic structural view two of a release process and a loading process of a clip instrument, according to some embodiments of the present specification;

[0054] FIG. 21C is an exemplary structural schematic diagram three of the clip device release process and loading process, according to some embodiments of the present specification;

[0055] FIG. 21D is an exemplary structural schematic diagram four of the clip device release process and loading process, according to some embodiments of the present specification;

[0056] FIG. 21E is an exemplary structural schematic diagram five of the clip device release process and loading process, according to some embodiments of the present specification;

[0057] FIG. 22 is an exemplary flow chart of a control method of a clip device, according to an embodiment six of the present specification;

[0058] FIG. 23 is an exemplary flow chart of a control method of a clip device, according to an embodiment seven of the present specification.

[0059] Reference signs are:

[0060] 1, clip device; 10, operating device; 110, mandrel; 111, branch structure; 112, hook portion; 120, first operating handle; 121, first sliding block; 122, first push portion; 130, second operating handle; 131, second sliding block; 132, second push portion; 140, handle seat; 141, first sliding groove; 142, second sliding groove; 150, third operating handle; 20, delivery device; 210, sheath; 211, inner sheath; 212, outer sheath; 220, base; 221, elastic portion; 222, guide groove; 30, clip device; 310, clamping assembly; 310-1, first clamping assembly; 310-2, second clamping assembly; 311, clamping portion; 3111, locked portion; 3111-1, first locked portion; 3111-2, second locked portion; 3112, proximal end connecting portion; 3113, clamping piece; 3114, holding portion; 3115, narrow portion; 3116, stop portion; 3117, guide inclined surface; 3118, actuating portion; 312, locking piece; 3121, locking portion; 3121-1, first locking portion; 3121-2, second locking portion; 3122, limiting interface; 320, limiting piece; 321, fixed end; 322, stop end; 323, matching portion; 330, operating arm; 331, proximal end connecting portion; 332, distal end connecting portion; 3321, butt joint portion; 333, first connecting structure; 3331, inclined segment; 3332, axial segment; 334, second connecting structure; 335, main body. DETAILED DESCRIPTION

[0061] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and for those skilled in the art, the present specification can also be applied to other similar scenarios without creative labor on the basis of these drawings. Unless it is clear from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structures or operations.

[0062] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, sections or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0063] As shown in the specification and claims, unless the context clearly indicates otherwise, the words "one", "a", "an", and / or "the" do not refer to the singular, but can also include the plural. Generally speaking, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0064] Flowcharts are used in the present specification to illustrate the operations performed by the system according to the embodiments of the present specification. It should be understood that the preceding or subsequent operations are not necessarily performed in sequence. On the contrary, each step can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or one or more steps of the operation can be removed from these processes.

[0065] The clip instrument is a commonly used medical instrument for hemostatic operation under endoscopy, which plays a hemostatic role by mechanically clamping the mucosal tissue around the wound. The traditional clip instrument is locked by a locking ring or a tightening tube, which is prone to problems such as unstable locking or excessive retention length. For traditional clip instruments with multiple clamping components, the multiple clamping components are usually assembled and released by a pull belt structure or a mandrel, which has many problems such as complex loading and releasing operation, poor flexibility, etc.

[0066] In view of this, in some embodiments of the present specification, it is desirable to provide an improved clip instrument and a control method thereof, by improving the structures of the locking member, the operating arm, the inner and outer sheath tubes, the operating handle, etc., to provide a clip instrument with fast and flexible loading, stable locking, and minimized retention, in order to meet the clinical demand for efficient and safe hemostatic tools.

[0067] FIG. 1A is an exemplary structural block diagram of a clip instrument 1 according to some embodiments of the present specification. FIG. 1B is a partial enlarged view of area A of the clip instrument 1 according to some embodiments of FIG. 1A.

[0068] As shown in FIGS. 1A and 1B, some embodiments of the present specification provide a clip instrument 1 which can be applied to a medical endoscope to perform clamping, hemostasis, suturing, and the like during endoscopic surgery.

[0069] In some embodiments, the clip instrument 1 includes an operating device 10, a delivery device 20, and a clip device 30. Exemplarily, the operating device 10 includes a handle seat 140, at least one operating handle for direct contact and control by a user, and a mandrel 110 connected to the clip device 30, and the operating handle controls the clip device 30 to perform opening, closing, locking, releasing, and the like through the mandrel 110; the delivery device 20 includes a sheath 210 and the like for accommodating and delivering the clip device 30; and the clip device 30 includes a clamping assembly 310 and an operating arm 330 and the like for clamping tissue, wherein the tissue refers to organ tissue of a human or other living body, or tissue of some non-living experimental object, and the like.

[0070] First of all, it should be noted that the "proximal end" and "distal end" involved in the embodiments of the present specification can represent directions, the side facing the operator is the "proximal end", and the side facing the treatment into the human body is the "distal end"; the "proximal end" and "distal end" can also represent the part structure and end located in the corresponding direction. The "axial direction" and "radial direction" involved in the embodiments of the present specification can represent directions, the "radial direction" is perpendicular to the "axial direction", for example, the axial direction of a component can be defined as a direction consistent with the extension direction of the channel of the sheath 210, and the radial direction of the component can be defined as a direction consistent with the direction perpendicular to the extension direction of the channel of the sheath 210.

[0071] The present specification will illustrate the clip instrument 1 through a plurality of embodiments, and the structures of the embodiments can be arbitrarily combined and referenced, and the combined scheme is also within the protection scope of the present specification.

[0072] FIG. 2 is an exemplary structural schematic diagram of a clip instrument 1 according to an embodiment of the present specification. FIG. 3 is an exemplary structural schematic diagram of a clamping part 311 according to some embodiments of the present specification. FIG. 4 is an exemplary structural schematic diagram of a locking member 312 according to some embodiments of the present specification.

[0073] As shown in FIGS. 2 to 4, the first embodiment of the present specification provides a clip instrument 1 which includes a clamping assembly 310 for clamping tissue and remaining at the tissue position to assist wound healing.

[0074] In some embodiments, the clamping assembly 310 comprises a clamping part 311 and a locking piece 312, the clamping part 311 comprises at least one locked part 3111, the locking piece 312 comprises at least one locking part 3121, the at least one locked part 3111 is configured to cooperate with the corresponding locking part 3121 respectively, and the clamping part 311 is locked with the locking piece 312. For example, when the locked parts 3111 are multiple, the structures of the respective locked parts 3111 can be the same or different; the respective locked parts 3111 can be symmetrical or regularly arranged on the clamping part 311, or can be dispersed at various positions of the clamping part 311 according to structural characteristics and locking requirements, and the present specification does not limit this. According to the structure of the clamping assembly 310, at least one locked part 3111 is arranged on the clamping part 311 and cooperates with the corresponding locking part 3121 on the locking piece 312, which can enhance the stability and reliability of the locking.

[0075] In some embodiments, the distance L1 between the proximal end of the clamping part 311 and the first locked part 3111-1, which is the most distal one of the at least one locked part 3111, is less than or equal to the axial length L2 of the locking piece 312. Wherein, the axial direction of the locking piece 312 corresponds to the length direction of the clamping part 311; the axial length of the locking piece 312 refers to the distance between the most distal end and the proximal end of the locking piece 312 in the axial direction of the locking piece 312. The locking piece 312 comprises a first locking part 3121-1 corresponding to the first locked part 3111-1, and when the first locked part 3111-1 cooperates with the first locking part 3121-1, the proximal end of the clamping part 311 will not protrude from the proximal end of the locking piece 312, that is, the locking length of the clamping part 311 and the locking piece 312 after cooperation is between L1 and L2. Wherein, the locking length refers to the distance between the proximal end of the clamping part 311 and the distal end of the locking piece 312 in the axial direction when the clamping part 311 and the locking piece 312 are in the locked state. If the locking length is too short, it may cause insufficient binding force between the clamping part 311 and the locking piece 312, unstable locking, etc., and if the locking length is too long, it may cause excessive retention length, etc. By controlling the locking length to be between L1 and L2, the locking force between the clamping part 311 and the locking piece 312 can be ensured, and the structure after locking is more compact, avoiding excessive retention length, and the overall performance is more stable and safer. Optionally, the proximal end of the locking piece 312 has a cavity, and when the clamping part 311 is locked with the locking piece 312, the part between the proximal end of the clamping part 311 and the first locked part 3111-1, which is the most distal one of the at least one locked part 3111, is located in the cavity.

[0076] In some embodiments, the clamping assembly 310 comprises a locked state, in which the locked portions 3111 cooperate with the locking portions 3121 to limit the opening of the clamping portion 311, for example, the first locked portion 3111-1 below. After the locked portions 3111 cooperate with the locking portions 3121, the relative displacement between the clamping portion 311 and the locking member 312 can be limited, for example, the second locked portion 3111-2 below. The relative displacement between the clamping portion 311 and the locking member 312 includes but is not limited to relative axial movement, relative radial movement, relative rotation, etc. By limiting the opening of the clamping portion 311 and the relative displacement between the clamping portion 311 and the locking member 312 by the locking member 312, a double locking effect is achieved, and the locking stability of the clamping portion 311 is improved.

[0077] In some embodiments, the clamping assembly 310 further comprises an unlocked state, in which the locking portions 3121 limit the proximal end of the clamping portion 311, so that the clamping portion 311 and the locking member 312 remain in a connected state. For more examples of the locked state and the unlocked state, see FIGS. 5A-6D and the related descriptions.

[0078] In some embodiments, the locking portions 3121 comprise at least two, and the at least two locking portions 3121 are arranged in an axial direction of the locking member 312; and / or, the at least two locking portions 3121 are arranged in a circumferential direction of the locking member 312. Correspondingly, the locking member 312 comprises a plurality of locking portions 3121, and the plurality of locking portions 3121 are arranged in a linear manner in the axial direction of the locking member 312. In some embodiments, the locking member 312 comprises a plurality of locking portions 3121, and the plurality of locking portions 3121 are arranged in a linear manner in the circumferential direction of the locking member 312. For example, the locking member 312 comprises a plurality of locking portions 3121, and the locking portions 3121 are arranged in a staggered manner on the locking member 312, so that the locking portions 3121 are arranged in an interval in the axial and circumferential directions of the locking member 312. By arranging the locking portions 3121 in multiple directions, the locking stability of the clamping portion 311 can be improved.

[0079] For example, the locking member 312 comprises a cavity that accommodates the proximal end of the clamping portion 311, and the locking portions 3121 include but are not limited to protrusions protruding from the inner wall of the cavity, or are formed as notches on the side wall of the cavity. For example, the locking member 312 is configured in a prismatic shape to reduce the risk of rotation of the locking member 312 relative to the sheath 210.

[0080] FIGS. 5A-5D are schematic structural diagrams of the clamping assembly 310 in an unlocked state according to some embodiments of the present specification. FIGS. 6A-6D are schematic structural diagrams of the clamping assembly 310 in a locked state according to some embodiments of the present specification.

[0081] In some embodiments, the clamping assembly 310 comprises an unlocked state, i.e. a state in which the locking portion 3121 does not limit the full movement or partial movement of the clamping portion 311. For example, the state in which the locking portion 3121 does not limit the full movement of the clamping portion 311 can include that the clamping portion 311 can freely move in the axial direction, the radial direction and the circumferential direction relative to the locking portion 3121, and the clamping portion 311 can be freely opened and closed. For another example, the state in which the locking portion 3121 does not limit the partial movement of the clamping portion 311 can include that the movement of the clamping portion 311 in the axial direction, the radial direction and the circumferential direction relative to the locking portion 3121 is limited, and the clamping portion 311 can be freely opened and closed.

[0082] In some embodiments, the clamping assembly 310 comprises a locked state, i.e. a state in which the locking portion 3121 limits the full movement of the clamping portion 311, including but not limited to that the clamping portion 311 is limited in the axial direction, the radial direction and the circumferential direction relative to the locking portion 3121, and the clamping portion 311 is always limited in the closed state.

[0083] In combination with FIGS. 3, 5A-6D, the clamping portion 311 comprises a proximal connecting portion 3112 and two clamping pieces 3113 provided on the proximal connecting portion 3112, and each clamping piece 3113 is provided with a first locked portion 3111-1 at the proximal end. A first locking portion 3121-1 corresponding to the first locked portion 3111-1 is provided at the distal end of the locking member 312. In the locked state, the first locked portion 3111-1 and the first locking portion 3121-1 cooperate to limit the opening of the two clamping pieces 3113. By providing the first locked portion 3111-1 at the proximal end of the clamping piece 3113 and the first locking portion 3121-1 at the distal end of the locking member 312, the length of the cooperation between the clamping portion 311 and the locking portion 3121 can be shortened, and the retention length can be shortened.

[0084] For example, the first locked portion 3111-1 comprises a through hole or a groove provided at the proximal end of the clamping piece 3113, and the first locking portion 3121-1 comprises a protrusion provided at the distal end of the locking member 312. When the protrusion and the groove cooperate, the clamping portion 311 is limited in the axial direction, the radial direction and the circumferential direction relative to the locking portion 3121, and the clamping portion 311 is limited in the closed state and cannot be opened. At this time, the clamping portion 311 is locked with the locking member 312.

[0085] In some embodiments, the clamping portion 311 in the unlocked state, the first locking portion 3121-1 is further configured to limit the clamping portion 311 from being pulled out of the distal end of the locking member 312, so that the clamping portion 311 and the locking member 312 are always kept in the connected position, avoiding accidental release of the clamping portion 311. For example, the first locking portion 3121-1 protrudes radially inward along the locking member 312, and in the unlocked state, the first locking portion 3121-1 abuts the distal side of the proximal connecting portion 3112, thereby limiting the proximal connecting portion 3112 from moving distally relative to the locking member 312.

[0086] In some embodiments, the proximal connecting portion 3112 includes an arc-shaped segment and two curved segments, the two ends of the arc-shaped segment are connected to the clamping pieces 3113 through the curved segments respectively, in the unlocked state, the curved segments drive the clamping pieces 3113 to open in response to the elastic restoring force of the curved segments, and in the locked state, the curved segments are accommodated in the locking member 312. For example, in the clamping direction of the clamping portion 311 (as shown by the arrow A in FIGS. 5D and 6D), the curved segments between the clamping pieces 3113 and the arc-shaped segment are in a tightened state. In the unlocked state, the first locking portion 3121-1 abuts on the arc-shaped segment, limiting the clamping portion 311 from being pulled out of the locking member 312. For example, the arc-shaped segment is a rigid structure, and the curved segments are elastic structures, and the curved segments allow the clamping pieces 3113 to perform opening and closing actions by deforming, thereby realizing the clamping function. In other examples, the arc-shaped segment can also be an elastic structure, etc., and the deformation capability of the arc-shaped segment is less than that of the curved segments.

[0087] In some embodiments, the second locked part 3111-2 is arranged on the proximal end of the curved section and protrudes along the width direction of the clamping piece 3113, and the second locking part 3121-2 includes a buckle formed on the side wall of the locking piece 312; in the unlocked state, the second locked part 3111-2 abuts against the distal end side of the buckle, and when the force acting on the second locked part 3111-2 in the proximal end direction is less than a preset force value, the buckle can limit the movement of the second locked part 3111-2 in the proximal end direction, at this time, the first locking part 3121-1 can limit the movement of the clamping part 311 in the distal end direction, so that the movement range of the clamping part 311 is limited between the first locking part 3121-1 and the second locking part 3121-2, and the stability of the clamping part 311 in the unlocked state can be improved. When the force acting on the second locked part 3111-2 in the proximal end direction is greater than or equal to the preset force value, the second locked part 3111-2 deforms to pass through the buckle and abut against the proximal end side of the buckle, at this time, the buckle limits the movement of the second locked part 3111-2 in the distal end direction, and the clamping part 311 is locked by the locking piece 312. In some other embodiments, the clamping part 311 only includes the second locked part 3111-2, the locking piece 312 includes the first locking part 3121-1 and the second locking part 3121-2, and the second locking part 3121-2 is configured as a limiting hole or a limiting slot. When the second locked part 3111-2 and the second locking part 3121-2 are matched, the clamping part 311 is locked. In the unlocked state, the first locking part 3121-1 and the second locking part 3121-2 limit the second locked part 3111-2, preventing the clamping part 311 from being separated from the locking piece 312.

[0088] In some embodiments, the clip instrument 1 further includes a sheath 210, and the distal end of the sheath 210 is provided with a base 220 for mounting the clamping assembly 310. The base 220 includes an elastic part 221, and the elastic part 221 is releasably connected with the locking piece 312. A limiting piece 320 is arranged on the elastic part 221, and the limiting piece 320 includes a fixed end 321 and a stop end 322. The fixed end 321 is fixed with the elastic part 221, and the stop end 322 is releasably connected with the locking piece 312. The limiting piece 320 is configured to drive the elastic part 221 to deform radially outward along the base 220 when the limiting piece 320 moves radially along the sheath 210 due to force, so that the locking piece 312 is released from the base 220.

[0089] In some embodiments, the locking member 312 comprises a limiting interface 3122 configured to releasably connect with the stop end 322 for limiting axial movement of the locking member 312 relative to the base 220. For example, the limiting interface 3122 is constituted by a hole formed in the sidewall of the locking member 312.

[0090] In some embodiments, the clamping portion 311 comprises an actuating portion 3118 configured to actuate the stop member 320 to move radially along the sheath 210 when or after the clamping portion 311 is locked with the locking member 312. For example, the actuating portion 3118 is provided at the end of the second locked portion 3111-2, and the limiting interface 3122 is provided adjacent to the second locking portion 3121-2, when the second locked portion 3111-2 is engaged with the second locking portion 3121-2, the actuating portion 3118 is located at the limiting interface 3122 and pushes the stop member 320 out of the limiting interface 3122 radially, so as to release the locking member 312 from the base 220. For another example, the actuating portion 3118 can be a separate spring. When the clamping portion 311 is locked with the locking member 312, the spring is ejected from the proximal connecting portion 3112 and pushes the stop member 320 to move radially along the sheath 210.

[0091] More examples of the sheath 210, the base 220, the stop member 320 and the actuating portion 3118 can be found in FIGS. 7-9 and their related descriptions.

[0092] In some embodiments, the clamping portion 311 comprises two clamping pieces 3113, each of which is provided with a holding portion 3114 and a narrow portion 3115 on two sides thereof, and the narrow portion 3115 is smaller in size than the holding portion 3114 in the width direction of the clamping piece 3113; the clipper instrument 1 further comprises an operating arm 330 comprising a docking portion 3321 engaged with the clamping piece 3113, the docking portion 3321 comprising a first state and a second state: in the first state, the docking portion 3321 is engaged with the holding portion 3114, and the operating arm 330 is configured to control the movement of the at least two clamping pieces 3113; in the second state, the docking portion 3321 is aligned with the narrow portion 3115, and the operating arm 330 is disengaged from the clamping piece 3113.

[0093] In some embodiments, the narrow portion 3115 is provided on the distal side of the holding portion 3114, and the operating arm 330 is configured to move distally to a position aligned with the narrow portion 3115 after the clamping portion 311 is locked, and disengage from the clamping piece 3113 by opening action. More examples of the clamping piece 3113 and the operating arm 330 can be found in Embodiment III and FIG. 14 and their related descriptions.

[0094] In some embodiments, the clip device 1 comprises a sheath 210 having a channel, and at least two clamping assemblies 310 arranged in the channel of the sheath 210 in sequence, and each abutting at the end in the unlocked state.

[0095] In some embodiments, the clip device 1 comprises at least two operation arms 330 movably arranged at the distal end of the sheath 210, and a launch channel is formed between the at least two operation arms 330 to allow the clamping assemblies 310 to pass through; the first clamping assembly 310-1 located at the distal end of the at least two clamping assemblies 310 is releasably connected with the operation arm 330 in the launch channel, and after the first clamping assembly 310-1 is released from the operation arm 330, the adjacent second clamping assembly 310-2 moves to the distal end and enters the launch channel to be releasably connected with the operation arm 330. More examples of the operation arm 330 and the launch channel can be found in FIGS. 14-18 and the related descriptions thereof.

[0096] In some embodiments, the clip device 1 can comprise a plurality of clamping assemblies 310 in any of the above embodiments, and the plurality of clamping assemblies 310 are arranged in the channel of the sheath 210 in sequence. Each clamping assembly 310 comprises a clamping portion 311 and a locking member 312, and by optimizing the locking length of the clamping portion 311 and the locking member 312, the locking stability of each clamping assembly 310 can be improved, and the length of the clamping assembly 310 can be prevented from being too long. When the plurality of clamping assemblies 310 are arranged in the channel of the sheath 210, each clamping assembly 310 is more compact, more clamping assemblies 310 can be accommodated in the channel of the sheath 210, each clamping assembly 310 has an appropriate locking length, and in the unlocked state, the clamping portion 311 and the locking member 312 are also in the connected state, and the overall structure has strong stability, which is convenient for pushing and loading in the channel of the sheath 210. More exemplary embodiments of the clip device 1 provided with a plurality of clamping assemblies 310 can be found in FIGS. 18-23 and the related descriptions thereof.

[0097] FIG. 7 is a schematic structural diagram of an exemplary clip device 1 according to Embodiment Two of the present specification. FIG. 8 is a schematic structural diagram of an exemplary base 220 according to some embodiments of the present specification. FIG. 9 is a schematic structural diagram of an exemplary limiting member 320 according to some embodiments of the present specification. It should be noted that Embodiment Two can be appropriately combined with Embodiment One, and the combined scheme is still within the protection scope of the present specification.

[0098] As shown in FIGS. 7-9, Embodiment Two of the present specification provides a clip device 1, which comprises a clamping assembly 310, a sheath 210 (shown in FIG. 1A), and a limiting member 320, and the clamping assembly 310 is releasably connected with the sheath 210 through the limiting member 320.

[0099] In some embodiments, the clamping assembly 310 comprises a clamping portion 311 and a locking member 312 for locking the clamping portion 311. For example, the locking member 312 is in abutment with the proximal end of the clamping portion 311, locking the clamping portion 311. The sheath 210 is provided with a base 220 at the distal end thereof, the base 220 being configured to mount the clamping assembly 310. For example, the base 220 comprises a channel for receiving the clamping assembly 310, the clamping assembly 310 being releasably mounted in the channel. The base 220 comprises an elastic portion 221, the elastic portion 221 being releasably connected with the locking member 312. The elastic portion 221 refers to a region or structure on the sidewall of the base 220 that can be elastically deformed. The limiting member 320 comprises a fixed end 321 and a stop end 322, the fixed end 321 being fixed with the elastic portion 221, and the stop end 322 being releasably connected with the locking member 312. The limiting member 320 is configured to drive the elastic portion 221 to deform radially outwardly along the base 220 when the limiting member 320 is forced to move radially along the sheath 210, so as to release the locking member 312 from the base 220.

[0100] In some embodiments, the base 220 is integrally formed with the sheath 210. In other embodiments, the base 220 and the sheath 210 are two separate structures, the base 220 being rotatably arranged at the distal end of the sheath 210 about the axis of the sheath 210, facilitating adjustment of the clamping portion 311 to be consistent with the direction of wound closure.

[0101] According to the above scheme, the limiting member 320 only needs to make a simple movement change during the release of the locking member 312, without the need for a deformed structure, making the structure of the limiting member 320 simpler, the positioning accuracy higher, and the risk of fatigue failure reduced. The traditional release of the locking member 312 is achieved by elastic deformation of a limiting structure to release the locking member 312. In the embodiments of the present specification, the elastic portion 221 of the base 220 undertakes the deformation task, and the elastic portion 221 has a relatively large size and a stronger ability to withstand deformation or repeated deformation compared with the traditional limiting structure, thereby prolonging the service life.

[0102] In some embodiments, the limiting member 320 is a rigid structure, which refers to a structure that does not deform under stress. In other embodiments, the limiting member 320 can also be an elastic structure. For example, the limiting member 320 comprises, but is not limited to, a pin, a column, a rod, and the like.

[0103] In some embodiments, the locking member 312 comprises a limiting interface 3122, the limiting interface 3122 being configured to be releasably connected with the stop end 322 of the limiting member 320, for limiting the axial movement of the locking member 312 relative to the base 220. For example, the limiting interface 3122 is constituted by a hole formed in the sidewall of the locking member 312, the stop end 322 of the limiting member 320 entering the limiting interface 3122 along the radial direction of the locking member 312, thereby limiting the axial movement of the locking member 312 relative to the base 220.

[0104] FIGS. 10A-10C are schematic structural diagrams of the clamping portion 311 cooperating with the base 220, according to some embodiments of the present specification.

[0105] In combination with FIGS. 3, 4, 10A-10C, in some embodiments, the clamping portion 311 comprises an actuating portion 3118 configured to actuate the limiting member 320 to move radially along the sheath 210 when or after the clamping portion 311 is locked with the locking member 312. For example, the actuating portion 3118 is arranged at the end of the second locked portion 3111-2, and the limiting interface 3122 is arranged adjacent to the second locking portion 3121-2. When the second locked portion 3111-2 cooperates with the second locking portion 3121-2, the actuating portion 3118 is located at the limiting interface 3122 and pushes the limiting member 320 out of the limiting interface 3122 radially, so that the locking member 312 is released from the base 220. In other embodiments, the actuating portion 3118 is arranged at the proximal connecting portion 3112 of the clamping portion 311, and the actuating portion 3118 comprises a spring. When the clamping portion 311 is locked with the locking member 312, the spring is ejected from the proximal connecting portion 3112 and pushes the limiting member 320 to move radially along the sheath 210.

[0106] FIG. 11 is a schematic structural diagram of an example of the operating arm 330, according to some embodiments of the present specification. FIG. 12 is a schematic structural diagram of an example of the mandrel 110, according to some embodiments of the present specification. FIGS. 13A-13C are schematic structural diagrams of the operating arm 330 cooperating with the base 220, according to some embodiments of the present specification.

[0107] As shown in FIGS. 11-13C, in some embodiments, the clip instrument 1 further comprises an operating arm 330, which comprises a proximal joint 331 and a distal joint 332, the proximal joint 331 is movably connected with the base 220, and the distal joint 332 is releasably connected with the clamping portion 311, the operating arm 330 is configured to perform opening and closing movement and axial movement for controlling the clamping portion 311 to open, close, lock and release. Among them, the “movable connection” in the embodiments of the present specification refers to the relative movement between two components (such as the proximal joint 331 and the base 220) within a certain stroke range, including rotation, translation or a combination of both. When the operating arm 330 performs opening and closing movement, it drives the clamping portion 311 to open or close; when the operating arm 330 performs proximal axial movement in the closed state, it drives the clamping portion 311 to move proximally and cooperate with the locking member 312, and the clamping portion 311 is locked; after the operating arm 330 performs distal axial movement in the closed state, it then performs opening action, so that the distal joint 332 of the operating arm 330 is disengaged from the clamping portion 311, and the clamping portion 311 is released. For example, the number of operating arms 330 can be one, when one operating arm 330 cooperates with a first clamping piece of the clamping portion 311, other clamping pieces can be linked with the first clamping piece, when one operating arm 330 operates the first clamping piece to open, close, lock and release, other clamping pieces are linked with the first clamping piece or are driven by the elasticity of their own bending segments to perform opening, closing, locking and releasing actions synchronously with the first clamping piece. For example, the number of operating arms 330 can be two, the two operating arms 330 are symmetrically arranged along the axis of the sheath 210, and control two clamping pieces 3113 respectively. For example, the operating arm 330 can also be multiple, the multiple operating arms 330 are arranged in a ring array along the axis of the sheath 210, which can be applied to the clip instrument 1 with multiple clamping pieces 3113.

[0108] In combination with FIG. 9, in some embodiments, the proximal joint 331 comprises a first connecting structure 333, the limiting member 320 further comprises a matching part 323, the first connecting structure 333 is movably connected with the matching part 323, for guiding the opening and closing movement and the axial movement of the operating arm 330. For example, the first connecting structure 333 comprises a sliding groove, the sliding groove comprises an inclined section 3331 and an axial section 3332, the extending direction of the axial section 3332 is consistent with the axial direction of the base 220, and the inclined section 3331 is arranged at an obtuse angle with the axial section 3332. The matching part 323 of the limiting member 320 is a sliding rod, the sliding groove is sleeved on the sliding rod, when the sliding rod is slidably connected with the inclined section 3331, the operating arm 330 can perform the opening and closing movement, and when the sliding rod is connected with the axial section 3332, the operating arm 330 can perform the axial movement. For example, the sliding rod of the limiting member 320 is located between the fixed end 321 and the stop end 322, and the cross section of the sliding rod is smaller than the cross section of the fixed end 321 and / or the stop end 322. The operating arm 330 is positioned by the sliding rod of the limiting member 320, so that the operating arm 330 moves within a certain range, thereby improving the control accuracy of the operating arm 330.

[0109] In some embodiments, the axial section 3332 is arranged at the distal side of the inclined section 3331, when the operating arm 330 moves distally, the sliding rod enters the inclined section 3331 from the axial section 3332, the operating arm 330 is opened, when the operating arm 330 moves proximally, the sliding rod enters the axial section 3332 from the inclined section 3331, the operating arm 330 is closed, and after being closed, the operating arm 330 can move axially proximally.

[0110] In some embodiments, the proximal joint 331 comprises a second connecting structure 334, the clipper instrument 1 further comprises a mandrel 110, the distal end of the mandrel 110 is connected with the second connecting structure 334, the proximal end of the mandrel 110 is connected with an operating handle, the operating handle controls the axial movement of the mandrel 110 along the sheath 210, thereby driving the movement of the operating arm 330. For example, the second connecting structure 334 comprises a connecting hole, the distal end of the mandrel 110 comprises a hook part 112, the hook part 112 is rotatably connected with the connecting hole. For example, the distal end of the mandrel 110 at least partially comprises two branch structures 111, the distal ends of the two branch structures 111 are respectively connected with the two operating arms 330, the two operating arms 330 can be synchronously controlled to move through the branch structures 111, thereby improving the control accuracy and coordination. For example, the two branch structures 111 can be flat pull belt structures, so as to reduce the space occupied in the sheath 210.

[0111] In some embodiments, the base 220 further comprises a guide groove 222 extending in the axial direction, and at least a part of the distal end of the mandrel 110 is in sliding fit with the guide groove 222, so as to limit the movement direction and range of the mandrel 110, and improve the accuracy of controlling the movement of the operation arm 330. For example, the distal end of the mandrel 110 comprises a hook portion 112, and the hook portion 112 is in sliding fit with the guide groove 222. For example, the guide groove 222 is two, and the mandrel 110 comprises two branch structures 111, and the distal end of each branch structure 111 is provided with a hook portion 112, which is in fit with the second connecting structure 334 and in sliding fit with the guide groove 222.

[0112] In some embodiments, the clipper instrument 1 can comprise a plurality of clamping assemblies 310 in any of the above embodiments, which are arranged in the channel of the sheath 210 in sequence. Each clamping assembly 310 is releasably connected to the base 220 by the limiting member 320. By optimizing the limiting member 320 and the base 220, the limiting member 320 is forced to move in the radial direction of the base 220, and the elastic portion 221 of the base 220 is deformed, and the limiting member 320 is disengaged from the clamping assembly 310. For each clamping assembly 310, the rigid limiting member 320 can ensure that the clamping assembly 310 is stably positioned in the loaded state, which is conducive to maintaining the structural stability of the clamping portion 311 when performing opening, closing, locking and other movements, and preventing accidental release. The elastic portion 221 of the base 220 can change the diameter of the channel of the base 220 as needed, which is conducive to quickly loading the next clamping assembly 310 and improving the efficiency of release and loading. More exemplary embodiments of the clipper instrument 1 provided with a plurality of clamping assemblies 310 can be seen in FIGS. 18-23 and the related descriptions thereof.

[0113] FIG. 14 is a schematic structural diagram of an exemplary clipper instrument 1 according to Embodiment Three of the present specification. It should be noted that Embodiment Three can be appropriately combined with the above embodiments, and the combined scheme is still within the protection scope of the present specification.

[0114] In combination with FIGS. 3 and 14, Embodiment Three of the present specification provides a clipper instrument 1, which comprises a clamping portion 311 and an operation arm 330, and the clamping portion 311 and the operation arm 330 are releasably connected.

[0115] In some embodiments, the clamping portion 311 comprises two clamping pieces 3113, and each clamping piece 3113 is provided with a gripping portion 3114 and a narrow portion 3115 on both sides. In the width direction of the clamping piece 3113, the size of the narrow portion 3115 is smaller than the size of the gripping portion 3114. The width direction of the clamping piece 3113 refers to the direction indicated by arrow B in FIG. 3.

[0116] In some embodiments, the operation arm 330 comprises a docking portion 3321 cooperating with the clamping piece 3113, the docking portion 3321 comprises a first state and a second state: in the first state, the docking portion 3321 cooperates with the holding portion 3114, the operation arm 330 is configured to control the movement of the at least two clamping pieces 3113; in the second state, the docking portion 3321 is aligned with the narrow portion 3115, the operation arm 330 is disengaged from the clamping piece 3113. The operation arm 330 can be switched between the first state and the second state, which improves the flexibility of the clip instrument 1. By providing the narrow portion 3115, the operation arm 330 is disengaged from the clamping piece 3113, which reduces the difficulty of releasing the operation arm 330 from the clamping piece 3113, and realizes the quick release of the operation arm 330 and the clamping portion 311.

[0117] In some embodiments, the narrow portion 3115 is provided on the distal side of the holding portion 3114. When the docking portion 3321 is in the first state, the docking portion 3321 cooperates with the holding portion 3114, for example, snap-fit or friction fit, etc., at this time the operation arm 330 can control the opening, closing and locking of the clamping portion 311. For example, when the operation arm 330 performs an opening and closing movement, the clamping portion 311 opens and closes; after the operation arm 330 is closed, continue to perform the axial movement towards the proximal end, the clamping portion 311 is locked. For example, the operation arm 330 is configured to move towards the distal end to the position aligned with the narrow portion 3115 after the clamping portion 311 is locked, and disengage from the clamping piece 3113 by opening action.

[0118] In some embodiments, the narrow portion 3115 is formed by a groove on both sides of the clamping piece 3113, along the length direction of the clamping portion 311, the size of the groove is equal to or slightly larger than the size of the docking portion 3321. For example, the part between the distal end of the clamping piece 3113 and the holding portion 3114 constitutes the narrow portion 3115, to simplify the processing. For example, the docking portion 3321 is located at the distal end of the operation arm 330, a clamping groove is formed by folding from both sides of the operation arm 330, which can allow the clamping piece 3113 to pass through.

[0119] In some embodiments, the clamping piece 3113 further comprises a stop portion 3116, which is provided on the proximal side of the holding portion 3114, when the clamping portion 311 is closed, the proximal end of the docking portion 3321 abuts against the stop portion 3116, so that the operation arm 330 can drive the clamping portion 311 to move towards the proximal end. For example, the stop portion 3116 protrudes from the width direction or the thickness direction of the clamping piece 3113. By providing the stop portion 3116, the proximal movement of the docking portion 3321 relative to the clamping portion 311 is limited, when the operation arm 330 moves towards the proximal end, the clamping portion 311 can be driven to move towards the proximal end together through the stop portion 3116, which improves the connection stability of the operation arm 330 and the clamping portion 311 in the first state.

[0120] In some embodiments, the operating arm 330 includes a distal joint 332 and a proximal joint 331, the docking portion 3321 is provided on the distal joint 332, the proximal joint 331 is movably connected with the sheath 210, and the proximal joint 331 is configured to enable the operating arm 330 to perform the opening and closing movement and the axial movement, thereby enabling the clamping portion 311 to perform the opening, closing, locking and releasing. The clipper instrument 1 includes the sheath 210 and the mandrel 110 provided in the channel of the sheath 210, the distal end of the mandrel 110 is matched with the proximal joint 331 for driving the operating arm 330 to perform the opening and closing movement and the axial movement.

[0121] For more exemplary embodiments of the operating arm 330 and the mandrel 110, please refer to FIGS. 11-13C and the related descriptions thereof.

[0122] In some embodiments, the clipper instrument 1 can include a plurality of clamping assemblies 310 in any of the above embodiments, which are arranged in sequence in the channel of the sheath 210. Among them, the clamping assembly 310 includes the clamping portion 311 and the locking member 312, the clamping portion 311 includes the gripping portion 3114 and the narrow portion 3115, when the operating arm 330 is matched with the gripping portion 3114, the operating arm 330 drives the clamping portion 311 to move, when the operating arm 330 is aligned with the narrow portion 3115, the operating arm 330 can be disengaged from the clamping portion 311, after the last clamping assembly 310 is released by the operating arm 330, the clamping portion 311 of the next clamping assembly 310 is docked with the operating arm 330 and matched with the operating arm 330 through the gripping portion 3114. For the plurality of clamping assemblies 310, a single operating arm 330 can control the movement and release of the plurality of clamping assemblies 310, which simplifies the release mechanism, reduces the mutual influence between the clamping assemblies 310, and improves the reliability. For more exemplary embodiments of the clipper instrument 1 provided with a plurality of clamping assemblies 310, please refer to FIGS. 18-23 and the related descriptions thereof.

[0123] FIG. 15 is an exemplary structural schematic diagram of the clipper instrument 1 in an open state according to some embodiments of the present specification. FIGS. 16A-16C are exemplary structural schematic diagrams of the clipper instrument 1 in a closed state according to some embodiments of the present specification. FIGS. 17A-17C are exemplary structural schematic diagrams of the clipper instrument 1 in a locked state according to some embodiments of the present specification.

[0124] In combination with the clipper instrument 1 in the above three embodiments, the clipper instrument 1 as shown in FIGS. 15-17C includes the opening, closing and locking processes of the clamping portion 311.

[0125] In some embodiments, the clamping portion 311 is in an unlocked state, the docking portion 3321 of the operating arm 330 is engaged with the holding portion 3114 of the clamping portion 311, when the mandrel 110 moves distally, the sliding rod of the limiting member 320 slides into the inclined segment 3331 of the sliding groove of the operating arm 330, and slides towards the proximal end of the inclined segment 3331, at this time the sliding groove can guide the operating arm 330 to perform an opening action, and the operating arm 330 drives the clamping portion 311 to open. At this time, the clamping portion 311 can be used to clamp tissue.

[0126] In some embodiments, when the mandrel 110 moves proximally, the sliding rod slides in the inclined segment 3331 towards the distal end of the inclined segment 3331, at this time the sliding groove can guide the operating arm 330 to perform a closing action, and the operating arm 330 drives the clamping portion 311 to close.

[0127] In some embodiments, when the mandrel 110 continues to move proximally, the sliding rod enters the axial segment 3332 and slides towards the distal end of the axial segment 3332, the operating arm 330 drives the clamping portion 311 to move proximally synchronously, at this time the at least two locked portions 3111 of the clamping portion 311 are engaged with the at least two locking portions 3121 of the locking member 312, and the clamping portion 311 is locked; the actuating portion 3118 of the clamping portion 311 enters the limiting interface 3122 of the locking member 312, and drives the limiting member 320 to move radially outwardly relative to the base 220, the elastic portion 221 of the base 220 deforms radially outwardly, and the locking member 312 is disengaged from the base 220.

[0128] In some embodiments, when the mandrel 110 moves distally, the sliding rod slides towards the proximal end of the axial segment 3332, the operating arm 330 moves distally, while the clamping portion 311 remains in the original position (e.g. abuts against the tissue in the original position), the docking portion 3321 of the operating arm 330 is disengaged from the holding portion 3114 and moves to a position aligned with the narrow portion 3115. The mandrel 110 continues to move distally, the sliding rod enters the inclined segment 3331, the inclined segment 3331 guides the operating arm 330 to open, the docking portion 3321 is disengaged from the narrow portion 3115, and the operating arm 330 is disengaged from the clamping portion 311. At this time, the clamping assembly 310 is released.

[0129] FIG. 18 is a schematic structural diagram of a clip instrument 1 according to an embodiment four of the present specification. It should be noted that the embodiment four can be appropriately combined with the above-mentioned embodiments, and the combined scheme is still within the protection scope of the present specification.

[0130] In combination with FIG. 14 and FIG. 18, the fourth embodiment of the present specification provides a clip device 1, which comprises a sheath 210, at least two clamping assemblies 310 and two operation arms 330, the clamping assemblies 310 are releasably arranged between the operation arms 330, and the at least two clamping assemblies 310 are arranged in the channel of the sheath 210.

[0131] In some embodiments, the sheath 210 comprises a channel for accommodating the at least two clamping assemblies 310. The at least two clamping assemblies 310 comprise clamping portions 311 and locking members 312, and the clamping assemblies 310 are axially movably arranged in the channel of the sheath 210. For example, the number of the at least two clamping assemblies 310 includes but is not limited to 2-10, such as 3, 5, 6, 8 clamping assemblies 310.

[0132] In some embodiments, the at least two operation arms 330 are movably arranged at the distal end of the sheath 210, and a launch channel is formed between the at least two operation arms 330 to allow the clamping assemblies 310 to pass through. The launch channel refers to a channel for the clamping assemblies 310 to perform various operations. After entering the launch channel, the clamping assemblies 310 can be opened, closed, locked, and released, and then leave the sheath 210 from the launch channel and stay on the tissue. For example, the first clamping assembly 310-1 located at the distal end of the at least two clamping assemblies 310 is releasably connected with the operation arm 330 in the launch channel. After the first clamping assembly 310-1 is released from the operation arm 330, the adjacent second clamping assembly 310-2 moves distally and enters the launch channel to releasably cooperate with the operation arm 330. For example, the number of operation arms 330 can be two, and the two operation arms 330 are symmetrically arranged along the axis of the sheath 210 to control two clamping portions 3113 respectively. For example, the operation arms 330 can also be multiple, and the multiple operation arms 330 are arranged in a ring array along the axis of the sheath 210, which can be applied to the clip device 1 with multiple clamping portions 3113.

[0133] According to the structure of the above-mentioned clip device 1, the launch channel formed between the operation arms 330 can more accurately and flexibly deploy the clamping assemblies 310, and make the clamping assemblies 310 release and load more quickly, which is beneficial to rapid hemostasis. The launch channel of the operation arms 330 as an extension of the channel of the sheath 210 can optimize the spatial layout in the sheath 210, making the structure more compact and reasonable.

[0134] In some embodiments, the clip device 1 further comprises a mandrel 110 arranged in the channel of the sheath 210, the distal end of the mandrel 110 is connected with the at least two operating arms 330 respectively, the mandrel 110 reciprocates along the sheath 210 to drive the operating arms 330 to open and close and to move axially; the operating arms 330 comprise an open state and a closed state: in the open state, the operating arms 330 drive the clamping assemblies 310 to open; in the closed state, the two operating arms 330 form a launching channel. For example, as shown in FIG. 11, the operating arms 330 comprise a main body 335 and a proximal joint 331, the proximal joint 331 is arranged on one side of the main body 335 and is arranged substantially perpendicular to the main body 335, wherein substantially perpendicular means that the included angle between the two components is in the range of 80°-100°. When the at least two operating arms 330 are arranged together, the proximal joint 331 and the main body 335 enclose to form a launching channel.

[0135] In some embodiments, each clamping assembly 310 comprises a clamping part 311 and a locking part 312, the clamping part 311 comprises a proximal connecting part 3112 and a first locked part 3111-1, the locking part 312 comprises a channel accommodating the proximal connecting part 3112 and a first locking part 3121-1; the clamping part 311 comprises an unlocked state and a locked state: in the unlocked state, the first locking part 3121-1 abuts against the proximal connecting part 3112, so that the proximal connecting part 3112 is positioned in the channel; in the locked state, the first locking part 3121-1 cooperates with the first locked part 3111-1, and the clamping part 311 is locked. For more embodiments of the clamping part 311 and the locking part 312, please refer to the related description of Embodiment I.

[0136] In some embodiments, the at least two clamping assemblies 310 are arranged in the channel of the sheath 210 in sequence and abut against each other in the unlocked state. For example, the at least two clamping assemblies 310 comprise a first clamping assembly 310-1 and a second clamping assembly 310-2 arranged adjacently, the proximal end of the first clamping assembly 310-1 abuts against the distal end of the second clamping assembly 310-2, and the remaining clamping assemblies 310 are arranged in a similar manner to abut against each other. By arranging the at least two clamping assemblies 310 in the channel of the sheath 210, the hemostasis operation for multiple bleeding points can be performed, and the operation efficiency is improved; and the at least two clamping assemblies 310 abut against each other, so that the arrangement of the clamping assemblies 310 is more compact, the space in the sheath 210 is maximized, and the continuity of the operation can be ensured when the clamping assemblies 310 are released.

[0137] In combination with FIG. 3, in some embodiments, the clamping portion 311 is provided with a guide slope 3117 at the distal end thereof, which is used to guide the clamping portion 311 into the launching channel, so as to improve the docking accuracy of the clamping portion 311 and the launching channel. For example, the guide slope 3117 is arranged at the distal end of the clamping piece 3113, and when the clamping portion 311 is docked with the launching channel, the guide slope 3117 is abutted with the proximal end of the launching channel, and the position of the clamping portion 311 is adjusted so as to smoothly enter the launching channel, avoiding the phenomenon of jamming. On the other hand, the guide slope 3117 is also used to guide the clamping piece 3113 to cooperate with the docking portion 3321 of the operating arm 330, so as to improve the docking fluency of the two. By arranging the guide slope 3117, the loading process of the clamping assembly 310 and the launching channel is more smooth and fluent.

[0138] FIGS. 19A-19B are schematic structural diagrams of the loading process of the clip instrument 1 according to some embodiments of the present specification.

[0139] As shown in FIGS. 19A-19B, in some embodiments, the operating arm 330 comprises a docking portion 3321, the clamping portion 311 comprises two clamping pieces 3113, and the clamping piece 3113 is provided with a holding portion 3114 at both sides thereof; the locking member 312 comprises a limiting interface 3122, and the sheath 210 comprises a limiting member 320. The loading process of the clamping assembly 310 and the launching channel comprises: after the second clamping assembly 310-2 enters the launching channel, the holding portion 3114 cooperates with the docking portion 3321, and the limiting interface 3122 cooperates with the limiting member 320. Specifically, after the first clamping assembly 310-1 is released, the mandrel 110 moves towards the proximal end, drives the operating arm 330 to close and form the launching channel. The second clamping assembly 310-2 moves towards the distal end and enters the launching channel, the distal end of the clamping portion 311 passes through the docking portion 3321 of the operating arm 330, until the docking portion 3321 cooperates with the holding portion 3114, the limiting interface 3122 of the locking member 312 moves to the position of the limiting member 320 and cooperates with the limiting member 320, and thus the loading process of the second clamping assembly 310-2 in the launching channel is completed.

[0140] In some embodiments, the clamping portion 311 comprises two clamping pieces 3113, the clamping piece 3113 comprises an actuating portion 3118 and a narrow portion 3115 arranged at both sides of the clamping piece 3113, and the narrow portion 3115 is arranged at the distal end side of the holding portion 3114. The releasing process of the clamping assembly 310 and the launching channel comprises: when the operating arm 330 is configured to move towards the proximal end, the clamping portion 311 can be locked with the locking member 312, and the actuating portion 3118 can actuate the limiting member 320 to disengage from the limiting interface 3122; after the clamping portion 311 is locked, the operating arm 330 is further configured to move towards the distal end, so that the docking portion 3321 disengages from the holding portion 3114 and is aligned with the narrow portion 3115, and the docking portion 3321 disengages from the clamping piece 3113 through the opening action.

[0141] According to the loading and releasing process of the clamping assembly 310 and the launching channel, only the cooperation or disengagement of the clamping part 311 and the operating arm 330 and the cooperation or disengagement of the locking part 312 and the limiting part 320 need to be controlled, which is simple in structure, improves reliability, and reduces operation complexity and failure risk.

[0142] FIG. 20A is a schematic structural view of a clip instrument 1 according to Embodiment V of the present specification. FIG. 20B is a sectional view taken along line C-C of the clip instrument 1 shown in FIG. 20A. It should be noted that Embodiment V can be appropriately combined with the above-mentioned embodiments, and the combined scheme is still within the protection scope of the present specification.

[0143] As shown in FIGS. 20A and 20B, Embodiment V of the present specification provides a clip instrument 1, which comprises a sheath tube 210, at least two clamping assemblies 310 arranged in the channel of the sheath tube 210 in sequence in an axially movable manner, and an operating device 10 for controlling the movement of the at least two clamping assemblies.

[0144] In some embodiments, the sheath tube 210 comprises an inner sheath tube 211 and an outer sheath tube 212, the inner sheath tube 211 is arranged inside the outer sheath tube 212 in an axially movable manner, and the distal end of the inner sheath tube 211 abuts against the clamping assembly 310 located at the most proximal end among the at least two clamping assemblies 310. For example, the outer diameter of the inner sheath tube 211 is equal to or substantially equal to the inner diameter of the outer sheath tube 212, and substantially equal means that the fitting gap between the inner sheath tube 211 and the outer sheath tube 212 is within the allowable machining and assembly error range.

[0145] In some embodiments, the operating device 10 comprises a first operating handle 120 and a second operating handle 130, the first operating handle 120 is connected to the proximal end of the inner sheath tube 211 and is used to control the axial movement of the inner sheath tube 211 relative to the outer sheath tube 212, thereby driving the overall movement of the at least two clamping assemblies 310, and the second operating handle 130 is configured to control the movement of the first clamping assembly 310-1 located at the most distal end among the at least two clamping assemblies 310.

[0146] According to the clip instrument 1 in the above-mentioned scheme, the relative movement of the inner sheath tube 211 relative to the outer sheath tube 212 pushes the movement of the at least two clamping assemblies 310, which can provide sufficient pushing force for the clamping assemblies 310. And the first operating handle 120 controls the movement of multiple clamping assemblies 310 to the distal end, and the second operating handle 130 controls the movement of a single clamping assembly 310, the two operations do not affect each other, which can improve the control accuracy and accuracy.

[0147] In some embodiments, the inner sheath 211 is configured to push the at least two clamping assemblies 310 to move distally as a whole when moving distally, so that the first clamping assembly 310-1 is released outside the sheath 210, and the adjacent second clamping assembly 310-2 is assembled with the operating arm 330. Specifically, after the first clamping assembly 310-1 is disassembled with the operating arm 330 and the limiting piece 320, the inner sheath 211 moves distally to push the plurality of clamping assemblies 310 to move distally, the first clamping assembly 310-1 is released from the launching channel to the outside of the launching channel, the adjacent second clamping assembly 310-2 is synchronized into the launching channel, and is assembled with the operating arm 330 and the limiting piece 320 in the launching channel to achieve loading with the launching channel.

[0148] In some embodiments, the operating device 10 comprises a handle seat 140 for mounting the operating handle. A plurality of operating handles are mounted on the handle seat 140, which has high integration and is convenient for the user to operate.

[0149] For example, the handle seat 140 is formed with a first sliding groove 141, the first operating handle 120 comprises a first sliding block 121 and a first actuating portion 122, the sliding block is axially movably arranged in the first sliding groove 141, the proximal end of the inner sheath 211 is fixed with the first sliding block 121, one side of the first actuating portion 122 is fixed with the first sliding block 121, and the other side protrudes to the outside of the handle seat 140; the first sliding block 121 is used to limit the movement of the operating handle in the first sliding groove 141, and the first actuating portion 122 is used for the user to operate. The inner sheath 211 is directly pushed to move by the first sliding block 121 and the first actuating portion 122, the overall structure is simple, the energy loss is low, and the force transmission efficiency is high.

[0150] In some embodiments, the clipper instrument 1 further comprises a mandrel 110 arranged in the channel of the inner sheath 211, the proximal end of the mandrel 110 is fixed with the second operating handle 130, and the distal end of the mandrel 110 comprises two branch structures 111, the distal ends of the two branch structures 111 are respectively connected with the two operating arms 330. The connection mode of the operating arm 330 and the mandrel 110 can be referred to FIG. 11 to FIG. 13C and the related description thereof.

[0151] For example, the handle seat 140 is further formed with a second sliding groove 142, the second operating handle 130 comprises a second sliding block 131 and a second actuating portion 132, the second sliding block 131 is axially movably arranged in the second sliding groove 142, the proximal end of the mandrel 110 is connected with the second sliding block 131, a part of the second actuating portion 132 enters the second sliding groove 142 and is fixed with the second sliding block 131, and the other part protrudes from the outer surface of the handle seat 140 for the user to operate.

[0152] For example, the first operation handle 120 is located at the proximal end side of the second operation handle 130, and the first sliding slot 141 and the second sliding slot 142 form a through hole allowing the mandrel 110 to pass through. The proximal end of the mandrel 110 is connected to the second operation handle 130, and the mandrel 110 passes through the through hole and is connected to the operation arm. For example, the proximal end of the mandrel 110 is connected to the second operation handle 130, and then sequentially passes through the through hole from the second sliding slot 142 to the first sliding slot 141, and passes through the passage of the inner sheath 211 to the operation arm 330, and is connected to the proximal end combination part 331 of the operation arm 330.

[0153] In some embodiments, the operation device 10 further comprises a third operation handle 150 for controlling the clamping assembly 310 to rotate around the sheath 210 axis, so that the clamping direction of the clamping assembly 310 is consistent with the wound closing direction.

[0154] FIGS. 21A to 21E are exemplary structural schematic diagrams of the release process and the loading process of the clip instrument 1 according to some embodiments of the present specification. In the figures, the outer sheath is hidden.

[0155] In combination with the above-mentioned five embodiments of the clip instrument 1, in some embodiments, the release process and the loading process of the clip instrument 1 respectively include the first clamping assembly 310-1 and the second clamping assembly 310-2. The following will be described taking the first clamping assembly 310-1 and the second clamping assembly 310-2 of the clip instrument 1 as examples.

[0156] As shown in FIG. 21A, the second operation handle 130 controls the mandrel 110 to move proximally, so that the operation arm 330 drives the clamping part 311 to lock. At the same time, the actuating part 3118 of the clamping part 311 can actuate the limiting part 320 to move radially outward, and the elastic part 221 of the base 220 is deformed radially outward, so that the stop end 322 of the limiting part 320 is disengaged from the limiting interface 3122 of the locking part 312, and the locking part 312 is released from the base 220. Then, the second operation handle 130 controls the mandrel 110 to move distally, so that the abutting part 3321 of the operation arm 330 is aligned with the narrow part 3115 of the clamping part 311.

[0157] As shown in FIG. 21B, the second operation handle 130 controls the mandrel 110 to continue to move distally, so that the operation arm 330 is opened, and the abutting part 3321 is separated from the narrow part 3115, and the clamping part 311 is released from the operation arm 330.

[0158] As shown in FIG. 21C, the first operation handle 120 controls the inner sheath 211 to move distally, the inner sheath 211 pushes the at least two clamping assemblies 310 to move distally as a whole, at this time, the first clamping assembly 310-1 is pushed out of the launching channel, and the first clamping assembly 310-1 is released. After the first clamping assembly 310-1 is away from the launching channel, the second operation handle 130 controls the mandrel 110 to move proximally, so that the operation arm 330 is closed, the second clamping assembly 310-2 enters the launching channel, and the guide slope 3117 at the distal end of the clamping part 311 guides the butt joint of the abutting part 3321 of the operation arm 330.

[0159] As shown in FIG. 21D, after the first clamping assembly 310-1 is released from the sheath 210, the first operation handle 120 controls the inner sheath 211 to continue to move distally, so that the inner sheath pushes the second clamping assembly 310-2 to cooperate with the base 220 and the operation arm 330. Specifically, in the process of the inner sheath 211 pushing the second clamping assembly 310-2 to move distally, when the actuating part 3118 of the clamping part 311 passes through the limiting part 320, the limiting part 320 is pushed to move radially outward, and the elastic part 221 of the base 220 is deformed radially outward to form a channel allowing the locking part 312 to pass through.

[0160] As shown in FIG. 21E, the clamping part 311 continues to move distally, the limiting part 320 is butt jointed with the limiting interface 3122 of the locking part 312 and forms a limiting cooperation. Specifically, the first operation handle 120 controls the inner sheath 211 to continue to move distally, the inner sheath 211 pushes the second clamping assembly 310-2 to move distally, when the actuating part 3118 passes through the limiting part 320, the elastic part 221 restores the original shape and pushes the limiting part 320 to move radially inward, so that the limiting part 320 cooperates with the limiting interface 3122 of the locking part 312, at the same time, the abutting part 3321 of the operation arm 330 cooperates with the holding part 3114 of the clamping part 311, and the clamping part 311 is loaded on the base 220 and the operation arm 330.

[0161] FIG. 22 is an exemplary flowchart of a control method of the clip device 1 according to the embodiment six of the present specification. It should be noted that the control method of the embodiment six can be applied to the clip device 1 in any of the above embodiments.

[0162] The embodiment six of the present specification provides a control method of the clip device 1, the control method comprises a flow 2200, the flow 2200 can be executed by the operating device 10, and specifically comprises:

[0163] In step 2210, the operating device 10 operates the mandrel 110 to reciprocate along the sheath 210, so as to control the two operation arms 330 to open or close, thereby driving the clamping part 311 to open or close.

[0164] In some embodiments, the operating device 10 comprises a second operating handle 130 for controlling the movement of the mandrel 110. For example, the operating handle can be manually operated by a human. In other embodiments, the operating device 10 further comprises an automatic pushing mechanism, such as a screw transmission mechanism, an electromagnetic propulsion mechanism, a pneumatic piston mechanism, etc., which is connected to the second operating handle 130 for controlling the automatic movement of the second operating handle 130.

[0165] In some embodiments, the second operating handle 130 operates the mandrel 110 to move distally along the sheath 210 to control the two operating arms 330 to open by rotating, thereby driving the clamping part 311 to open. For example, when the mandrel 110 moves distally along the sheath 210, the operating arms 330 are pushed to move distally, and the sliding grooves of the operating arms 330 slide relative to the limit member 320, and the extension direction of the sliding grooves is arranged to make the operating arms 330 rotate to open. The abutting part 3321 of the operating arms 330 cooperates with the holding part 3114 of the clamping part 311, and when the operating arms 330 open, the clamping part 311 is driven to open. For example, the operating device 10 adjusts the actual position of the clamping part 311 to move the actual position of the clamping part 311 to a target position. The target position of the clamping part 311 can be a position spaced apart from a target object by a predetermined distance, and the target object can be a tissue or a tissue wound to be clamped. For example, the operating device 10 adjusts the clamping direction of the clamping part 311 to make the clamping direction of the clamping part 311 consistent with a target direction. The target direction of the clamping part 311 can be a direction of closing a tissue wound, etc.

[0166] In some embodiments, the mandrel 110 is operated to move proximally along the sheath 210 to control the two operating arms 330 to close by rotating, thereby driving the clamping part 311 to close. For example, when the mandrel 110 moves proximally along the sheath 210, the operating arms 330 are pushed to move proximally, and the sliding grooves of the operating arms 330 slide relative to the limit member 320, and the extension direction of the sliding grooves is arranged to make the operating arms 330 rotate to close. The abutting part 3321 of the operating arms 330 cooperates with the holding part 3114 of the clamping part 311, and when the operating arms 330 close, the clamping part 311 is driven to close.

[0167] In step 2220, the operating device 10 operates the mandrel 110 to move proximally along the sheath 210 to control the clamping part 311 to cooperate with the locking member 312, and to actuate the locking member 312 to release the sheath 210.

[0168] In some embodiments, referring to the clip device 1 in embodiments one to five, the clamping part 311 comprises an actuating part 3118 and at least two locked parts 3111, the locking member 312 comprises a limiting interface 3122 and at least two locking parts 3121, the sheath 210 comprises an elastic part 221 and a limiting member 320 fixed to the elastic part 221; the limiting member 320 cooperates with the limiting interface 3122, and the locking member 312 is releasably connected to the sheath 210.

[0169] In some embodiments, the operating device 10 operates the mandrel 110 to move proximally along the sheath 210, so as to control the operation arm 330 to move proximally along the sheath 210, and then drive the clamping part 311 to move proximally. For example, the second operation handle 130 controls the mandrel 110 to move proximally along the sheath 210, the sliding groove of the operation arm 330 slides relative to the sliding member, and the extension direction of the sliding groove is arranged so that the operation arm 330 can move proximally along the sheath 210 in the closed state. The abutting part 3321 of the operation arm 330 cooperates with the stop part 3116 of the clamping part 311, and when the operation arm 330 moves proximally, the clamping part 311 can be driven to move proximally.

[0170] In some embodiments, when the clamping part 311 moves proximally, the operating device 10 controls the at least two locked parts 3111 to cooperate with the at least two locking parts 3121, and the clamping part 311 cooperates with the locking member 312. For example, the clamping part 311 is in the unlocked state, and the at least two locked parts 3111 are in the uncooperative state with the at least two locking parts 3121. When the operation arm 330 drives the clamping part 311 to move proximally, the clamping part 311 enters the channel of the locking member 312, each locked part 3111 cooperates with the corresponding locking part 3121, so that the axial movement and the rotational movement of the clamping part 311 relative to the locking member 312 are limited, and at this time, the clamping part 311 enters the locked state.

[0171] In some embodiments, the operating device 10 controls the actuating part 3118 of the clamping part 311 to actuate the limiting member 320 to move radially along the sheath 210 and deform the elastic part 221 of the sheath 210 or the base 220, so that the limiting member 320 is disengaged from the limiting interface 3122, and the locking member 312 is released from the sheath 210. For example, when the clamping part 311 is in the unlocked state, the limiting member 320 cooperates with the limiting interface 3122, and the elastic part 221 is in the undeformed state. When the clamping part 311 moves proximally, the actuating part 3118 of the clamping part 311 moves the position of the corresponding limiting member 320, and pushes the limiting member 320 to move radially outward, the limiting member 320 drives the elastic part 221 to deform, so that the stop end 322 of the limiting member 320 is disengaged from the limiting interface 3122, and at this time, the locking member 312 is released from the sheath 210.

[0172] Step 2230, the operating device 10 operates the mandrel 110 to move distally along the sheath 210 to control the operation arm 330 to release the clamping part 311.

[0173] In some embodiments, referring to the clip instrument 1 in embodiments one to five, the clamping part 311 comprises a holding part 3114 and a narrow part 3115, the operation arm 330 comprises a docking part 3321, in the width direction of the clamping part 311, the radial dimension of the narrow part 3115 is smaller than that of the holding part 3114; when the docking part 3321 cooperates with the holding part 3114, the operation arm 330 is releasably connected with the clamping part 311.

[0174] In some embodiments, in the locked state of the clamping assembly 310, the operating device 10 operates the mandrel 110 to move distally along the sheath 210 to control the operation arm 330 to move linearly distally while the clamping assembly 310 remains in the original position, the operating device 10 controls the docking part 3321 to disengage from the holding part 3114 and continues to move to a position aligned with the narrow part 3115.

[0175] In some embodiments, the operating device 10 continues to operate the mandrel 110 to move distally along the sheath 210 to control the operation arm 330 to open due to rotation, so that the docking part 3321 is separated from the narrow part 3115, and the operation arm 330 is released from the clamping part 311.

[0176] According to the above technical solution, when the operating device 10 controls the mandrel 110 to move proximally, the clamping assembly 310 completes the actions of closing, locking, and releasing the locking member 312, and when the operating device 10 controls the mandrel 110 to move distally, the clamping assembly 310 completes the actions of opening and releasing the clamping part 311. That is, the operating device 10 controls the mandrel 110 to move reciprocally within a certain stroke range, so that the clamping assembly 310 completes the operations required for the surgery. Compared with the conventional one-way moving scheme, the reciprocating motion occupies less space and has a more compact structure.

[0177] FIG. 23 is an exemplary flowchart of a control method of the clip instrument 1 according to embodiment seven of the present specification. It should be noted that the control method of embodiment seven can be applied to the clip instrument 1 in any of the above embodiments.

[0178] Embodiment seven of the present specification provides a control method of a clip instrument 1, which comprises flowchart 2300 that can be executed by the operating device 10, and specifically comprises:

[0179] Step 2310, the operating device 10 operates the mandrel 110 to move reciprocally along the sheath 210 to control the operation arm 330 to open or close, thereby driving the first clamping assembly 310-1 located at the distal end of the at least two clamping assemblies 310 to open, close, lock, and release.

[0180] In some embodiments, referring to the clip device 1 in embodiments one to five, the operating arm 330 comprises a proximal end connecting part 3112, the proximal end connecting part 3112 comprises a first connecting structure 333 and a second connecting structure 334, the first connecting structure 333 is connected with the distal end of the mandrel 110, and the second connecting structure 334 is movably connected with the sheath 210, and the operating arm 330 is configured to be capable of performing opening and closing movement and axial movement.

[0181] In some embodiments, the operating device 10 operates the mandrel 110 to reciprocate along the sheath 210 to control the operating arm 330 to rotate relative to the sheath 210, so as to drive the operating arm 330 to open or close, thereby driving the first clamping assembly 310-1 to open and close. For example, when the mandrel 110 moves distally along the sheath 210, the operating arm 330 is pushed to move distally, the sliding groove of the operating arm 330 slides relative to the limiting part 320, and the extension direction of the sliding groove is arranged to make the operating arm 330 rotate to open. When the mandrel 110 moves proximally along the sheath 210, the operating arm 330 is pushed to move proximally, the sliding groove of the operating arm 330 slides relative to the limiting part 320, and the extension direction of the sliding groove is arranged to make the operating arm 330 rotate to close. The abutting part 3321 of the operating arm 330 cooperates with the holding part 3114 of the clamping part 311, and when the operating arm 330 opens or closes, the clamping part 311 is driven to open or close.

[0182] In some embodiments, the operating device 10 operates the mandrel 110 to move proximally along the sheath 210 to control the operating arm 330 in the closed state to move proximally relative to the sheath 210, thereby driving the first clamping assembly 310-1 to lock. For example, the clamping part 311 is in an unlocked state, and the at least two locked parts 3111 and the at least two locking parts 3121 are in an uncooperative state. When the operating arm 330 drives the clamping part 311 to move proximally, the clamping part 311 enters the channel of the locking part 312, each locked part 3111 cooperates with the corresponding locking part 3121, and the axial movement and the rotational movement of the clamping part 311 relative to the locking part 312 are limited, at this time, the clamping part 311 enters the locked state.

[0183] In some embodiments, the operating device 10 operates the mandrel 110 to move distally along the sheath 210 to control the distal movement of the operating arms 330 relative to the sheath 210 in the closed state, thereby causing the first clamping assembly 310-1 to be released from the operating arms 330 and the sheath 210. For example, when the second operating handle 130 controls the mandrel 110 to move proximally and the operating arms 330 cause the first clamping assembly 310-1 to be locked, the actuating portion 3118 of the clamping portion 311 can actuate the limiting member 320 to move radially outward, and the elastic portion 221 of the base 220 is deformed radially outward, so that the stop end 322 of the limiting member 320 is disengaged from the limiting interface 3122 of the locking member 312, and the locking member 312 is released from the base 220. Then, the second operating handle 130 controls the mandrel 110 to move distally, so that the abutting portion 3321 of the operating arms 330 is aligned with the narrow portion 3115 of the clamping portion 311. After that, the second operating handle 130 controls the mandrel 110 to continue to move distally, so that the operating arms 330 are opened, the abutting portion 3321 is separated from the narrow portion 3115, and the clamping portion 311 is released from the operating arms 330.

[0184] In step 2320, the operating device 10 operates the mandrel 110 to move proximally along the sheath 210 to control the operating arms 330 to close.

[0185] In some embodiments, before the operating arms 330 are closed, the steps further include: the first operating handle 120 controls the inner sheath 211 to move distally, and the inner sheath 211 pushes the at least two clamping assemblies 310 to move distally as a whole, so that the first clamping assembly 310-1 is pushed out of the launch channel and released.

[0186] In some embodiments, after the first clamping assembly 310-1 is moved out of the launch channel, the second operating handle 130 controls the mandrel 110 to move proximally, so that the operating arms 330 are closed.

[0187] In step 2330, the operating device 10 operates the inner sheath 211 to move distally along the outer sheath 212 to control the remaining clamping assemblies 310 to move distally, so that the second clamping assembly 310-2 located at the distal end of the remaining clamping assemblies 310 is releasably connected to the operating arms 330.

[0188] In some embodiments, referring to the clip device 1 in embodiments one to five, the clamping portion 311 includes a holding portion 3114, the operating arms 330 include an abutting portion 3321, the locking member 312 includes a limiting interface 3122, the sheath 210 includes a limiting member 320, and the operating arms 330 form a launch channel therebetween.

[0189] In some embodiments, the operating device 10 operates the inner sheath 211 to move distally along the outer sheath 212, so that the second clamping assembly 310-2 enters the launching channel, and the guide slope 3117 at the distal end of the clamping part 311 guides the clamping part 311 to dock with the docking part 3321 of the operating arm 330.

[0190] In some embodiments, the operating device 10 operates the inner sheath 211 to continue to move distally along the outer sheath 212, controls the docking part 3321 to cooperate with the holding part 3114, and controls the limiting interface 3122 to cooperate with the limiting member 320, so that the second clamping assembly 310-2 is releasably connected with the operating arm 330. For example, the first operating handle 120 controls the inner sheath 211 to continue to move distally, the inner sheath 211 pushes the second clamping assembly 310-2 to move distally, when the actuating part 3118 of the clamping part 311 passes through the limiting member 320, the limiting member 320 is pushed to move radially outward, and the elastic part 221 of the base 220 is deformed radially outward to form a passage allowing the locking member 312 to pass through. Then, the first operating handle 120 controls the inner sheath 211 to continue to move distally, the inner sheath 211 pushes the second clamping assembly 310-2 to move distally, after the actuating part 3118 passes through the limiting member 320, the elastic part 221 restores the original shape and pushes the limiting member 320 to move radially inward, so that the limiting member 320 cooperates with the limiting interface 3122 of the locking member 312, at the same time, the docking part 3321 of the operating arm 330 cooperates with the holding part 3114 of the clamping part 311, and the clamping part 311 is loaded on the base 220 and the operating arm 330.

[0191] According to the above technical solution, the inner sheath 211 pushes the plurality of clamping assemblies 310 to move distally, so that the plurality of clamping assemblies 310 are sequentially loaded in the launching channel, and the inner sheath 211 pushes the clamping assembly 310 to be released from the launching channel after the clamping part 311 completes the clamping operation under the control of the operating arm 330. The clamping assembly 310 is controlled by the inner sheath 211 and the mandrel 110 to perform different actions respectively, and the two do not interfere with each other, which can improve the control accuracy and accuracy.

[0192] It should be noted that the above description of the processes 2200, 2300 is only for example and illustration, and does not limit the scope of the present specification. Those skilled in the art can make various modifications and changes to the processes 2200, 2300 under the guidance of the present specification. However, these modifications and changes are still within the scope of the present specification.

[0193] The beneficial effects that the embodiments of the present application can bring include but are not limited to:

[0194] (1) According to the structure of the clamping assembly, at least two locked parts are arranged on the clamping part, which are matched with the corresponding locking parts on the locking part, so as to enhance the stability and reliability of the locking.

[0195] (2) The distance L1 between the proximal end of the clamping part and the first locked part located at the farthest end of the at least two locked parts is less than or equal to the axial length L2 of the locking part, which solves the problem of unstable locking caused by too short locking length and the problem of too long retention length caused by too long locking length.

[0196] (3) By arranging the first locked part at the proximal end of the clamping part and the first locking part at the distal end of the locking part, the length of the clamping part and the locking part can be shortened, and the retention length can be shortened.

[0197] (4) During the release process of the locking part, the limiting part only needs to change the motion simply, without deformation structure, so that the structure of the limiting part is simpler, the positioning accuracy is higher, and the risk of fatigue failure is reduced.

[0198] (5) The operation arm is positioned by the sliding rod of the limiting part, so that the operation arm moves within a certain range, and the control accuracy of the operation arm is improved.

[0199] (6) The operation arm can be switched between the first state and the second state, improving the flexibility of the clip instrument. By arranging the narrow part, the operation arm and the clamping part are disengaged, reducing the difficulty of releasing the operation arm and the clamping part, and realizing the rapid release of the operation arm and the clamping part.

[0200] (7) By arranging the stop part to limit the proximal movement of the docking part relative to the clamping part, when the operation arm moves proximally, the clamping part can be driven by the stop part to move proximally together, improving the connection stability of the operation arm and the clamping part in the first state.

[0201] (8) The launch channel formed between the operation arms can more accurately and flexibly deploy multiple clamping assemblies, and the release and loading of the clamping assemblies are more rapid, which is beneficial to rapid hemostasis. The launch channel of the operation arm as the continuation of the sheath channel can optimize the space layout in the sheath, making the structure more compact and reasonable.

[0202] (9) By arranging at least two clamping assemblies in the sheath channel, the hemostasis operation of multiple bleeding points can be handled, and the operation efficiency is improved; and the at least two clamping assemblies abut at the head and tail, so that the arrangement of the clamping assemblies is more compact, the space in the sheath is maximized, and the continuity of the operation can be ensured when the clamping assemblies are released.

[0203] (10) During the loading and releasing process of the clamping assembly and the launch channel, only the clamping part and the operation arm are matched or disengaged, and the locking part and the limiting part are matched or disengaged, so that the structure is simple, the reliability is improved, and the operation complexity and the failure risk are reduced.

[0204] (11) Through the relative movement of the inner sheath tube relative to the outer sheath tube, the pushing force of the clamping assembly can be provided.

[0205] (12) The first operating handle controls the movement of multiple clamping assemblies to the distal end, and the second operating handle controls the movement of a single clamping assembly. The two operations do not affect each other, which can improve control accuracy and accuracy.

[0206] (13) When the operating device controls the proximal movement of the mandrel, the clamping assembly completes the actions of closing, locking, and releasing the locking member. When the operating device controls the distal movement of the mandrel, the clamping assembly completes the actions of opening and releasing the clamping part. That is, the operating device controls the reciprocating movement of the mandrel within a certain stroke range, which can make the clamping assembly complete the required operation. Compared with the traditional one-way movement scheme, the reciprocating movement occupies less space and has a more compact structure.

[0207] (14) The inner sheath tube and the mandrel control the clamping assembly to perform different actions, and the two do not interfere with each other, which can improve control accuracy and accuracy.

[0208] It should be noted that different embodiments can have different beneficial effects, and in different embodiments, the beneficial effects that can be produced can be any one or a combination of the above, or any other beneficial effect that can be obtained.

[0209] The above has described the basic concept. Obviously, for those skilled in the art, the above detailed disclosure is only used as an example and does not limit the present specification. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the present specification. Such modifications, improvements and corrections are suggested in the present specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present specification.

[0210] At the same time, the present specification uses specific words to describe the embodiments of the present specification. As "one embodiment", "an embodiment", and / or "some embodiments" means a certain feature, structure or characteristic related to at least one embodiment of the present specification. Therefore, it should be emphasized and noted that the "an embodiment" or "one embodiment" or "one alternative embodiment" mentioned in different places in the present specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present specification can be properly combined.

[0211] It should be appreciated that, for simplicity of illustration, the description of the embodiments of the present specification sometimes uses terms like "one embodiment," "one configuration," "an implementation," and "aspects" to refer to certain described embodiments of the present specification. This use of terms should not be construed to limit the present specification to only such embodiments. In general, the use of these terms to refer to certain described embodiments is merely to simplify the discussion and is not intended to limit the scope of the present specification. It should be appreciated that the use of these terms should not be interpreted to limit the scope of the present specification to only such embodiments. In other words, other embodiments of the present specification can include embodiments in which only a subset of the features are present, or other embodiments in which additional features are present. In other words, the use of these terms should not be interpreted to limit the scope of the present specification to only such embodiments.

[0212] Finally, it should be understood that the embodiments described herein are intended to be illustrative only and that the scope of the present specification is therefore not intended to be limited to the embodiments described herein. Rather, the scope of the present specification is intended to cover all modifications and variations of this present specification that fall within the scope of the present specification, as defined by the appended claims.

Claims

1. A clamping device, characterized in that, include: A clamping assembly includes a clamping portion and a locking member, the clamping portion including at least one locked portion, the locking member including at least one locking portion, the at least one locked portion being configured to engage with a corresponding locking portion, the clamping portion locking with the locking member, and the distance between the proximal end of the clamping portion and the farthest locked portion among the at least one locked portions being less than or equal to the axial length of the locking member.

2. The clamping device as described in claim 1, characterized in that, The clamping assembly includes a locked state, in which the locked part engages with the locking part to prevent the clamping part from opening; The clamping assembly also includes an unlocked state, in which the locking part limits the proximal end of the clamping part, keeping the clamping part and the locking member connected.

3. The clamping device as described in claim 1 or 2, characterized in that, The clamping part includes a proximal connecting part and two clamping pieces disposed on the proximal connecting part. Each clamping piece has a first locking part at its proximal end, and a first locking part corresponding to the first locking part is disposed at the distal end of the locking member. When the clamping part is locked, the first locking part and the first locking part cooperate to restrict the opening of the two clamping pieces.

4. The clamping device as described in claim 3, characterized in that, In the unlocked state, the first locking part is also configured to restrict the clamping part from disengaging from the distal end of the locking member; The first locking part protrudes inward along the radial direction of the locking member, and when the clamping part is in the unlocked state, the first locking part abuts against the distal side of the proximal connection part.

5. The clamping device as described in claim 3 or 4, characterized in that, The proximal connector includes an arc-shaped segment and two curved segments, with both ends of the arc-shaped segment connected to the clip via the curved segments. In the unlocked state, the bending segment, in response to its own elastic restoring force, drives the clip to open; In the locked state, the curved section is retracted into the locking member.

6. The clamping device as described in any one of claims 3 to 5, characterized in that, The proximal connecting portion is provided with a second locking portion, and the locking member includes the second locking portion; In the locked state, the second locked part engages with the proximal side of the second locking part to restrict the clamping part from opening; In the unlocked state, the second locked part is located at the distal end of the second locking part.

7. The clamping device as described in claim 6, characterized in that, The clamping part includes a clamping piece, the second locked part protrudes along the width direction of the clamping piece, and the second locking part includes a buckle formed on the side wall of the locking member. When the second locked part is subjected to a force towards its proximal end that is greater than or equal to a preset force value, the second locked part deforms and passes over the buckle, and abuts against the proximal end of the buckle.

8. The clamping device as described in any one of claims 1-7, characterized in that, The clamping device further includes a sheath, the distal end of which is provided with a base for mounting the clamping assembly. The base includes an elastic portion that is releasably connected to the locking member. The elastic part is provided with a limiting member, which includes a fixed end and a stop end. The fixed end is fixed to the elastic part, and the stop end is releasably connected to the locking member. The limiting member is configured to drive the elastic part to deform radially outward along the base when it moves radially along the sheath due to force, thereby releasing the locking member from the base.

9. The clamping device as described in claim 8, characterized in that, The locking element includes a limiting interface configured to be releasably connected to the stop end for limiting the axial movement of the locking element relative to the base.

10. The clamping device as described in claim 9, characterized in that, The clamping part includes an actuating part configured to actuate the limiting member to move radially along the sheath when or after the clamping part is locked with the locking member; The actuating part is located at the end of the second locked part, and the limiting interface is adjacent to the second locking part. When the second locked part and the second locking part cooperate, the actuating part is located at the limiting interface and pushes the limiting member radially out of the limiting interface.

11. The clamping device as described in any one of claims 1-10, characterized in that, The clamping part includes two clamping pieces, each clamping piece having a holding part and a narrowing part on both sides. In the width direction of the clamping piece, the size of the narrowing part is smaller than the size of the holding part. The clamping device further includes an operating arm, which includes a docking portion that engages with the clamping pieces. The docking portion includes a first state and a second state: in the first state, the docking portion engages with the gripping portion, and the operating arm is configured to control the movement of the at least two clamping pieces; in the second state, the docking portion aligns with the narrow portion, and the operating arm disengages from the clamping pieces.

12. The clamping device as described in claim 11, characterized in that, The narrow portion is located at the distal end of the gripping portion. The operating arm is configured to move distally to a position aligned with the narrow portion after the gripping portion is locked, and to disengage from the clamping plate by an opening action.

13. The clamping device as described in any one of claims 1-12, characterized in that, The clamping device includes a sheath with a channel and at least two clamping components, which are arranged sequentially within the sheath channel and are engaged end-to-end in the unlocked state.

14. The clamping device as described in claim 13, characterized in that, The clamping device includes at least two operating arms, which are movably disposed at the distal end of the sheath, and a firing channel is formed between the two operating arms to allow the clamping assembly to pass through. The first clamping assembly located at the farthest end of the at least two clamping assemblies is releasably connected to the operating arm within the launch channel. After the first clamping assembly is released from the operating arm, the adjacent second clamping assembly moves to the far end and enters the launch channel to releasably engage with the operating arm.

15. The clamping device as described in claim 13, characterized in that, The sheath includes an inner sheath and an outer sheath, the inner sheath being axially movable inside the outer sheath, and the distal end of the inner sheath abutting against the clamping assembly located at the closest end of at least two clamping assemblies. The operating device includes a first operating handle and a second operating handle. The first operating handle is connected to the proximal end of the inner sheath and is used to control the axial movement of the inner sheath relative to the outer sheath, thereby driving the overall movement of the at least two clamping assemblies. The second operating handle is configured to control the movement of the first clamping assembly located at the farthest end of the at least two clamping assemblies.

16. A clamping device, characterized in that, include: A clamping assembly includes a clamping part and a locking member, the locking member being used to lock the clamping part; A sheath, the distal end of which is provided with a base for mounting the clamping assembly, the base including an elastic part that is releasably connected to the locking member; The limiting member includes a fixed end and a stop end. The fixed end is fixed to the elastic part, and the stop end is releasably connected to the locking member. The limiting member is configured to drive the elastic part to deform radially outward along the base when it moves radially along the sheath due to force, thereby releasing the locking member from the base.

17. The clamping device as described in claim 16, characterized in that, The limiting component is a rigid structure.

18. The clamping device as described in claim 16, characterized in that, The locking element includes a limiting interface configured to be releasably connected to the stop end for limiting the axial movement of the locking element relative to the base.

19. The clamping device as described in claim 18, characterized in that, The clamping part includes an actuating part configured to actuate the limiting member to move radially along the sheath when or after the clamping part is locked with the locking member.

20. The clamping device as described in claim 19, characterized in that, The actuating part is located at the end of the second locked part, and the limiting interface is adjacent to the second locking part. When the second locked part and the second locking part cooperate, the actuating part is located at the limiting interface and pushes the limiting member radially out of the limiting interface.

21. The clamping device as described in claim 19, characterized in that, The actuating part includes a spring piece disposed at the proximal connecting part of the clamping part. After the clamping part is locked with the locking member, the spring piece is located at the proximal connecting part and pushes the limiting member radially out of the limiting interface.

22. The clamping device as described in claim 16, characterized in that, The clamping device also includes two operating arms, each including a proximal joint and a distal joint. The proximal joint is movably connected to the base, and the distal joint is releasably connected to the clamping part. The two operating arms are configured to perform opening and closing movements and axial movements to control the clamping part to open, close, lock, and release.

23. The clamping device as described in claim 22, characterized in that, The proximal joint includes a first connecting structure, and the limiting member further includes a mating part. The first connecting structure is movably connected to the mating part to guide the opening and closing movement and axial movement of the operating arm.

24. The clamping device as described in claim 23, characterized in that, The first connecting structure includes a slide groove, which includes an inclined section and an axial section. The mating part is a sliding rod. The slide groove is sleeved on the sliding rod. When the sliding rod is slidably engaged with the inclined section, the operating arm can perform an opening and closing motion. When the sliding rod is engaged with the axial section, the operating arm can perform an axial motion.

25. The clamping device as described in claim 22, characterized in that, The proximal joint includes a second connecting structure, and the clamping device also includes a spindle, the distal end of which is connected to the second connecting structure for driving the movement of the manipulator arm; The second connection structure includes a connection hole, and the distal end of the mandrel includes a hook portion that rotatably engages with the connection hole.

26. The clamping device as described in claim 25, characterized in that, At least a portion of the distal end of the mandrel forms two branch structures, the distal ends of which are respectively connected to the two operating arms.

27. The clamping device as described in claim 25, characterized in that, The base also includes an axially extending guide groove, at least a portion of the distal end of the mandrel slidingly engaging with the guide groove.

28. A clamping device, characterized in that, include: The clamping part includes two clamping pieces, each of which has a gripping part and a narrowing part on both sides. In the width direction of the clamping piece, the size of the narrowing part is smaller than the size of the gripping part. The operating arm includes a docking portion that engages with the clamping pieces. The docking portion includes a first state and a second state: in the first state, the docking portion engages with the gripping portion, and the operating arm is configured to control the movement of the at least two clamping pieces; in the second state, the docking portion aligns with the narrow portion, and the operating arm disengages from the clamping pieces.

29. The clamping device as described in claim 28, characterized in that, The narrow portion is located at the distal end of the gripping portion. The operating arm is configured to move distally to a position aligned with the narrow portion after the gripping portion is locked, and to disengage from the clamping plate by an opening action.

30. The clamping device as described in claim 28 or 29, characterized in that, The narrow portion is defined by grooves on both sides of the clamping piece, and the size of the groove is greater than or equal to the size of the mating portion along the length direction of the clamping portion; The docking part is located at the far end of the operating arm, and the two sides of the operating arm are folded to form a slot, which allows the clamping piece to pass through; In the first state, the slot and the gripping part form a limiting position; in the second state, the slot is aligned with the groove, and the slot disengages from the clip from the narrow part.

31. The clamping device as described in claim 28, characterized in that, The clamping device further includes a sheath, the operating arm includes a distal joint and a proximal joint, the docking part is disposed at the distal joint, the proximal joint is movably connected to the sheath, and the proximal joint is configured to enable the operating arm to perform opening and closing movements and axial movements, thereby driving the clamping part to perform opening, closing, locking and releasing.

32. The clamping device as described in claim 28, characterized in that, The clamp also includes a stop portion located on the proximal side of the gripping portion. When the clamping portion is closed, the proximal end of the mating portion abuts against the stop portion, enabling the operating arm to drive the clamping portion to move towards the proximal end.

33. A clamping device, characterized in that, include: Sheath, including the passage; At least two clamping assemblies, including clamping parts and locking elements, are axially movably disposed within the channel of the sheath; At least two operating arms are movably disposed at the distal end of the sheath, and a launch channel is formed between the at least two operating arms to allow the clamping assembly to pass through; The first clamping assembly located at the farthest end of the at least two clamping assemblies is releasably connected to the operating arm within the launch channel. After the first clamping assembly is released from the operating arm, the adjacent second clamping assembly moves to the far end and enters the launch channel to releasably engage with the operating arm.

34. The clamping device as described in claim 33, characterized in that, The clamping device also includes a mandrel disposed in the sheath channel, the distal end of the mandrel being connected to the at least two operating arms respectively, the mandrel reciprocating along the axial direction of the sheath, driving the operating arms to perform opening and closing movements and axial movements; The operating arm includes an open state and a closed state: in the open state, the operating arm drives the clamping assembly to open; in the closed state, the launching channel is formed between the at least two operating arms.

35. The clamping device as described in claim 33, characterized in that, Each of the clamping assemblies includes a clamping portion and a locking element, the clamping portion including a proximal connection portion and a first locking portion, and the locking element including a channel for receiving the proximal connection portion and the first locking portion; The clamping part includes an unlocked state and a locked state: in the unlocked state, the first locking part abuts against the proximal connecting part, thereby limiting the proximal connecting part within the channel; In the locked state, the first locking part engages with the first locked part, and the clamping part is locked.

36. The clamping device as described in claim 33, characterized in that, The operating arm includes a docking part, the clamping part includes at least two clamping plates, and the clamping plates are provided with gripping parts on both sides; the locking member includes a limiting interface, and the sheath includes a limiting member; After the second clamping assembly enters the launch channel, the gripping part cooperates with the docking part, and the limiting interface cooperates with the limiting member.

37. The clamping device as described in claim 36, characterized in that, The clamping part includes at least two clamping pieces, each clamping piece including an actuating part and a narrow part disposed on both sides of the clamping piece, the narrow part being disposed on the distal end side of the gripping part; When the operating arm is configured to move toward the proximal end, it can cause the clamping part to lock with the locking member, and the actuating part can actuate the limiting member to disengage from the limiting interface; After the clamping part is locked, the operating arm is also configured to, when moving to the distal end, disengage the docking part from the gripping part and align it with the narrow part, and disengage from the clamping piece through an opening action.

38. A clamping device, characterized in that, include: At least two clamping components; The sheath includes an inner sheath and an outer sheath. The inner sheath is axially movable and disposed inside the outer sheath. At least two clamping assemblies are sequentially arranged axially movable within the sheath channel. The distal end of the inner sheath abuts against the clamping assembly located at the closest end of the at least two clamping assemblies. The operating device includes a first operating handle and a second operating handle. The first operating handle is connected to the proximal end of the inner sheath and is used to control the axial movement of the inner sheath relative to the outer sheath, thereby driving the overall movement of the at least two clamping assemblies. The second operating handle is configured to control the movement of the first clamping assembly located at the farthest end of the at least two clamping assemblies.

39. The clamping device as described in claim 38, characterized in that, At least two operating arms are provided at the distal end of the sheath, and a launch channel is formed between the at least two operating arms. When the inner sheath is configured to move toward the distal end, it can push the at least two clamping assemblies to move toward the distal end as a whole, so that the first clamping assembly is released outside the sheath, and the adjacent second clamping assembly is assembled with the operating arm.

40. The clamping device as described in claim 38, characterized in that, The operating device includes a handle base with a first groove formed therein. The first operating handle includes a first slider and a first actuating part. The first slider is axially movable in the first groove. The proximal end of the inner sheath is fixed to the first slider. One side of the first actuating part is fixed to the first slider, and the other side protrudes to the outside of the handle base.

41. The clamping device as described in claim 40, characterized in that, The clamping device also includes a mandrel disposed within the inner sheath channel. The proximal end of the mandrel is fixed to the second operating handle, and the distal end of the mandrel includes two branch structures, the distal ends of which are respectively connected to the two operating arms.

42. The clamping device as described in claim 41, characterized in that, A second groove is formed in the handle seat, the first operating handle is located on the proximal side of the second operating handle, a through hole is formed between the first groove and the second groove to allow the mandrel to pass through, the proximal end of the mandrel is connected to the second operating handle, and the mandrel passes through the through hole to connect to the operating arm.

43. The clamping device as described in claim 38, characterized in that, The sheath is provided with a limiting member and an operating arm. The clamping assembly includes a locking member and a clamping part. The locking member includes a limiting interface. After the first clamping assembly is released from the sheath, the first operating handle is configured to push the second clamping assembly to move to the distal end through the inner sheath, so that the limiting member docks with the limiting interface and forms a limiting engagement. The clamping part engages with the operating arm.

44. A method for controlling a clamping device, characterized in that, include: The operating spindle reciprocates along the sheath to control the opening or closing of the two operating arms, thereby driving the clamping part to open or close. The spindle is moved proximally along the sheath to control the clamping part to engage with the locking member, and to actuate the locking member to release from the sheath. The spindle is moved distally along the sheath to control the release of the operating arm from the clamping part.

45. The control method for the clamping device as described in claim 44, characterized in that, The operating spindle reciprocates along the sheath, controlling the opening or closing of the operating arm, thereby causing the clamping part to open or close, including: The spindle is moved distally along the sheath to control the two operating arms to open due to rotation, thereby causing the clamping part to open; The spindle is moved proximally along the sheath to control the two operating arms to close due to rotation, thereby causing the clamping part to close.

46. ​​The control method for the clamping device as described in claim 44, characterized in that, The operation of moving the mandrel proximally along the sheath to control the clamping part to engage with the locking member and actuate the locking member to release from the sheath includes: The clamping part includes an actuating part and at least two locking parts; the locking member includes a limiting interface and at least two locking parts; the sheath includes an elastic part and a limiting member fixed to the elastic part; the limiting member cooperates with the limiting interface; and the locking member is releasably connected to the sheath. The spindle is moved proximally along the sheath to control the operating arm to move proximally along the sheath, thereby driving the clamping part to move proximally. When the clamping part moves toward the proximal end, it controls the at least two locked parts to cooperate with the at least two locking parts, and the clamping part cooperates with the locking member; The actuator of the clamping part is controlled to move the limiting member radially along the sheath and deform the elastic part, thereby disengaging the limiting member from the limiting interface and releasing the locking member from the sheath.

47. The control method for the clamping device as described in claim 44, characterized in that, The operation of moving the mandrel distally along the sheath to control the release of the operating arm from the clamping part includes: The clamping part includes a gripping part and a narrow part, and the operating arm includes a docking part. In the width direction of the clamping part, the radial dimension of the narrow part is smaller than the radial dimension of the gripping part. When the docking part is engaged with the gripping part, the operating arm can be released from the clamping part. The spindle is moved distally along the sheath, the docking part is disengaged from the gripping part, and the spindle continues to move to a position aligned with the narrow part. The spindle is operated to continue moving distally along the sheath, and the operating arm is controlled to open, so that the docking part separates from the narrow part, and the operating arm is released from the clamping part.

48. A method for controlling a clamping device, characterized in that, include: The operating spindle reciprocates along the sheath, controlling the opening or closing of the operating arm, thereby causing the first clamping assembly located at the farthest end of at least two clamping assemblies to open, close, lock, and release. The mandrel is moved proximally along the sheath to control the closing of the operating arm; The sheath includes an inner sheath and an outer sheath. By operating the inner sheath to move distally along the outer sheath, the remaining clamping components are controlled to move distally, so that the second clamping component located at the distal end of the remaining clamping components can be releasably connected to the operating arm.

49. The control method for the clamping device as described in claim 48, characterized in that, The operating spindle reciprocates along the sheath, controlling the opening or closing of the operating arm, thereby causing the first clamping assembly located at the farthest end of at least two clamping assemblies to open, close, lock, and release, including: The operating arm includes a proximal connection portion, which includes a first connection structure and a second connection structure. The first connection structure is connected to the distal end of the spindle, and the second connection structure is movably connected to the sheath. The operating arm is configured to perform opening and closing movements and axial movements. The spindle is operated to reciprocate along the sheath to control the rotation of the operating arm relative to the sheath, thereby opening or closing the operating arm and driving the first clamping assembly to open or close. The spindle is moved proximally along the sheath to control the operating arm in the closed state to move proximally relative to the sheath, thereby locking the first clamping assembly. The spindle is operated to move distally along the sheath to control the operating arm in the closed state to move distally relative to the sheath, thereby causing the first clamping assembly to release from the operating arm and the first clamping assembly to release from the sheath.

50. The control method for the clamping device as described in claim 48, characterized in that, The operation involves moving the inner sheath distally along the outer sheath, controlling the remaining clamping assemblies to move distally, and releasably connecting the second clamping assembly at the distal end of the remaining clamping assemblies to the operating arm, including: The clamping part includes a holding part, and the operating arm includes a docking part; the locking member includes a limiting interface, and the sheath includes a limiting member; a launching channel is formed between the operating arms; The inner sheath is moved distally along the outer sheath, causing the second clamping assembly to enter the firing channel; The inner sheath continues to move distally along the outer sheath, the docking part is controlled to cooperate with the gripping part, and the limiting interface is controlled to cooperate with the limiting member, so that the second clamping assembly and the operating arm can be released and connected.

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