Pull-type clamping device and control method for pull-type clamping device

Abstract

According to the traction type clamping and closing device and the control method for the traction type clamping and closing device, when a large wound surface is subjected to clamping and closing treatment, an operator mainly controls movement of a movable arm to achieve clamping and opening. A fixed arm of the traction type clamping device is provided with a first hook part, and a movable arm is provided with a second hook part. And in the pre-clamping state, the first hook part and the second hook part oppositely extend out, and the first hook part is located on the front side of the second hook part or the second hook part is located on the front side of the first hook part, so that an overlapped clamping structure is formed. By means of the overlapped clamping structure, tissue on one side of a wound surface can be more stably fixed to the fixed arm to be pre-clamped, then the movable arm hooks tissue on the other side of the wound surface by opening the movable arm, the clamping assembly is driven to be closed, the tissue on the two sides is pulled to be close to each other, and therefore closing of a large wound surface is achieved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a pulling-type clamping device and a method for operating the same. Background Art

[0002] With the continuous advancement of endoscopic technology, minimally invasive treatment models have gradually replaced some traditional open surgical procedures. Early-stage digestive tract lesions that previously required surgical laparotomy or laparoscopy can now be precisely intervened through endoscopic minimally invasive techniques. These techniques offer key advantages in terms of controlled tissue damage, shortened postoperative recovery periods, and improved utilization of medical resources. However, reliable intraoperative closure of defects / wounds remains a key bottleneck restricting the widespread use of this technology, particularly for large wounds. The effectiveness of these procedures directly impacts the incidence of postoperative complications and the universality of the technology.

[0003] Currently, the clinical closure devices used for large wounds in body cavities include single-arm clamps, double-arm clamps, three-arm clamps, or similar devices. However, these devices currently have limited closure effects when dealing with large defects (large wounds), and are prone to difficulty in completely closing large wounds. Summary of the Invention

[0004] The present application provides a traction-type clamping device and a control method for the traction-type clamping device, which are used to improve the closure effect on large wounds.

[0005] Based on the above objectives, an embodiment of the present application provides a pulling clamping device, comprising:

[0006] The clamping assembly comprises a fixed arm and a movable arm capable of moving relative to the fixed arm, the front end of the fixed arm having a first hook portion bent toward the side where the movable arm is located, and the front end of the movable arm having a second hook portion bent toward the side where the fixed arm is located; the clamping assembly has a pre-clamping state, a pre-clamping state and an open state; when the clamping assembly is in the pre-clamping state, the first hook portion and the second hook portion extend relative to each other, and the first hook portion is located in front of the second hook portion or the second hook portion is located in front of the first hook portion, forming an overlapping pre-clamping structure, so that the fixed arm can pierce and fix tissue on one side of the wound; when the clamping assembly is in the clamping state, the first hook portion and the second hook portion can pull tissue on both sides of the wound surface closed; when the clamping assembly is in the open state, the movable arm is opened relative to the fixed arm;

[0007] a motion conversion assembly comprising a detachment portion and a retention portion for being retained in the patient's body together with the clipping assembly, the detachment portion being connected to the retention portion in a manner capable of detaching from the retention portion during its rearward movement, the retention portion being connected to the movable arm to transmit a force to the movable arm that drives the movable arm to move relative to the fixed arm;

[0008] and a control assembly connected to the clamping assembly in a manner that allows it to disengage from the clamping assembly during its movement toward the rear end; the control assembly is simultaneously connected to the disengagement portion to drive the retention portion and the disengagement portion to move in the front-to-rear direction.

[0009] The traction-type clamping device shown in the above embodiment, when clamping a large wound, the operator mainly realizes clamping and opening by controlling the movement of the movable arm. The fixed arm of the traction-type clamping device has a first hook, and the movable arm has a second hook. In the pre-clamping state, the first hook and the second hook extend relative to each other, and the first hook is located in front of the second hook or the second hook is located in front of the first hook, so as to form an overlapping pre-clamping structure. The overlapping pre-clamping structure enables the tissue on one side of the wound surface to be more firmly fixed on the fixed arm for pre-clamping, and then by opening the movable arm, the movable arm is hooked to the tissue on the other side of the wound surface, and the clamping assembly is driven to close, pulling the tissues on both sides close to each other, thereby achieving closure of the large wound surface.

[0010] In some embodiments, the bending angle a of the first hook portion is in the range of: 45°≤a≤160°;

[0011] And / or, the bending angle b of the second hook portion is in the range of 45°≤b≤160°.

[0012] In some embodiments, the bending angle a of the first hook portion is in the range of: 55°≤a≤140°;

[0013] And / or, the bending angle b of the second hook portion is in the range of 55°≤b≤140°.

[0014] In some embodiments, the distal end of the first hook and / or the second hook has a pointed structure for piercing target tissue.

[0015] In some embodiments, the fixed arm is connected to the movable arm, and the movable arm has a bendable portion, which can be bent under the drive of the retention portion, so that the movable arm can open and close relative to the fixed arm;

[0016] The retention part includes a sliding block and a rocker arm, and the sliding block is connected to the detachment part in a manner that it can detach from the detachment part during the movement of the detachment part toward the rear end; one end of the rocker arm is rotatably connected to the sliding block, and the other end is connected to the movable arm to drive the flexible part to bend and reset when the sliding block moves in the front and rear directions.

[0017] In some embodiments, the motion conversion component includes a sliding pendulum block and a connecting rod connected to the control component, and the movable arm is fixedly connected to the sliding pendulum block; the clamping component has a fixed axis, and the sliding pendulum block has a sliding fitting portion, and the sliding fitting portion is inclined from front to back and from one side of the movable arm to the side of the fixed arm, and the sliding fitting portion forms a sliding fit with the fixed axis, and the rear end of the sliding pendulum block is movably connected to the connecting rod, and the connecting rod is connected to the control component; during the movement of the connecting rod in the front and rear directions, the sliding pendulum block swings around the fixed axis and slides relatively, so that the movable arm opens and closes relative to the fixed arm.

[0018] In some embodiments, the clamping assembly is a cylindrical structure, the motion conversion assembly is at least partially located within the cylindrical structure, and the side wall of the cylindrical structure is provided with an avoidance groove arranged along the front-to-back direction, and the avoidance groove is located on the rotation path of the motion conversion assembly to avoid the motion conversion assembly.

[0019] In some embodiments, the avoidance groove is provided on the fixed arm.

[0020] In some embodiments, the clamping assembly further includes a connecting sleeve, the fixed arm is fixedly connected to the connecting sleeve, the motion conversion assembly is at least partially located in the connecting sleeve, one end of the movable arm extends into the connecting sleeve, and the other end is located outside the connecting sleeve, and the motion conversion assembly achieves the closing and opening of the movable arm and the fixed arm by pulling the movable arm into the connecting sleeve and pushing the movable arm out of the connecting sleeve.

[0021] In some embodiments, the clamping assembly is a cylindrical structure, the motion conversion assembly is at least partially located within the cylindrical structure, and the cylindrical structure has a forward limiting portion to limit the forward extreme position of the motion conversion assembly.

[0022] In some embodiments, the clamping assembly has a locking portion, the detachment portion has a main body, a head, and a neck connecting the head and the main body, the retention portion has a deformable support foot, and the outer side of the support foot has a locking fitting portion; the support foot forms a card cavity with an opening, the head is accommodated in the card cavity, and the neck is passed through the opening, so that during the movement of the detachment portion toward the rear end, the head can push the support foot to deform outward, so that the detachment portion is separated from the retention portion, and the locking fitting portion forms a lock with the locking portion to keep the clamping assembly in a closed state.

[0023] In some embodiments, the control component has a decoupling spring and a traction wire body for connecting to a control handle, and the traction wire body is connected to the motion conversion component to drive the motion conversion component to move forward and backward; the clamping component has a window, and the decoupling spring is hung on the window to connect the clamping component to the control component; the decoupling spring is connected to the traction wire body, and during the movement of the traction wire body to the rear end, the decoupling spring can be separated from the window to separate the clamping component and the control component.

[0024] In some embodiments, the fixed arm and the movable arm are an integrally formed structure.

[0025] In some embodiments, the clamping assembly further includes a cylindrical connecting sleeve, which is located at the rear ends of the fixed arm and the movable arm, and is an integrally formed structure with the fixed arm and the movable arm. The connecting sleeve is provided with a locking portion for forming a forward locking structure with the retention portion and / or a window for connecting with the control assembly.

[0026] In some embodiments, the clamping assembly is an integrally formed structure formed by laser cutting.

[0027] Based on the above objectives, an embodiment of the present application provides a method for controlling a pull-type clamping device, wherein the pull-type clamping device is any of the pull-type clamping devices described above, and the method comprises:

[0028] Insertion step: inserting the front end of the pull-type clamping device into the target cavity of the patient;

[0029] First opening step: driving the motion conversion assembly to move toward the front end, causing the movable arm to open to a set angle relative to the fixed arm;

[0030] Pre-clamping step: driving the motion conversion assembly to move toward the rear end, driving the movable arm and the fixed arm to form a first closure, during which the disengagement portion and the retention portion remain connected, and the control assembly and the clamping assembly remain connected;

[0031] Second opening step: driving the motion conversion assembly to move toward the front end, causing the movable arm to open to a set angle relative to the fixed arm;

[0032] Pulling and closing step: driving the motion conversion assembly to move toward the rear end, driving the movable arm to close again with the fixed arm, during which the disengaging portion and the retaining portion remain connected, and the control assembly and the clamping assembly remain connected;

[0033] Separation step: driving the control component and the motion conversion component to move toward the rear end, and causing the disengagement portion and the retention portion to separate, and the control component and the clamping component to separate.

[0034] In the manipulation method shown in the above embodiment, the first hook of the fixed arm can be inserted into the tissue on one side of the wound surface through the pre-clamping step, so that the tissue on this side is more firmly fixed on the fixed arm, and then the second opening step is performed to open the movable arm and open the movable arm at a large angle, thereby hooking the tissue on the other side of the wound surface, and in the pulling and closing step, the tissues on both sides are pulled to the closing position, thereby achieving closure of a large wound surface.

[0035] Based on the above objectives, an embodiment of the present application provides a clamping structure of a pull-type clamping device, including a clamping assembly, wherein the clamping assembly includes:

[0036] A fixed arm, wherein the front end of the fixed arm has a first hook portion;

[0037] and a movable arm, wherein the front end of the movable arm has a second hook portion;

[0038] The movable arm is configured to be able to open and close relative to the fixed arm under the action of an external force, so that the clamping assembly has a pre-clamping state, a clamping state and an open state. When the clamping assembly is in the pre-clamping state, the first hook and the second hook extend relative to each other to form an overlapping pre-clamping structure; when the clamping assembly is in the clamping state, the first hook and the second hook can pull the tissues on both sides of the wound surface closed; when the clamping structure is in the open state, the movable arm is opened relative to the fixed arm.

[0039] In the clamping structure shown in the above embodiment, the fixed arm has a first hook and the movable arm has a second hook. In the pre-clamping state, the first hook and the second hook extend relative to each other, with the first hook located in front of the second hook, or the second hook located in front of the first hook, forming an overlapping pre-clamping structure. This overlapping pre-clamping structure allows the tissue on one side of the wound surface to be more firmly fixed to the fixed arm for pre-clamping. The movable arm can then be opened to hook the tissue on the other side of the wound surface, driving the clamping assembly to close, pulling the tissue on both sides closer together, thereby achieving closure of large wounds.

[0040] In some embodiments, a motion conversion component is further included that is driven by a control component. The fixed arm is connected to the movable arm, and the movable arm has a bendable portion. The motion conversion component is connected to the movable arm to transmit a force to the movable arm that drives the bendable portion to bend and reset, so that the movable arm can open and close relative to the fixed arm.

[0041] In some embodiments, the motion conversion component includes a sliding block and a rocker arm, wherein the sliding block is used to move in the forward and backward directions under the drive of the control component; one end of the rocker arm is rotatably connected to the sliding block, and the other end is connected to the movable arm to drive the flexible part to bend and reset when the sliding block moves in the forward and backward directions.

[0042] In some embodiments, a motion conversion component is also included, which includes a sliding pendulum block and a connecting rod for moving in the front-to-back direction under the drive of a control component, and the movable arm is fixedly connected to the sliding pendulum block; the clamping structure has a fixed axis, and the sliding pendulum block has a sliding fitting portion, and the sliding fitting portion is inclined from front to back and from one side of the movable arm to the side of the fixed arm, and the sliding fitting portion forms a sliding fit with the fixed axis, and the rear end of the sliding pendulum block is movably connected to the connecting rod; during the movement of the connecting rod in the front-to-back direction, the sliding pendulum block swings around the fixed axis and slides relatively, so that the movable arm opens and closes relative to the fixed arm.

[0043] In some embodiments, the clamping assembly is a cylindrical structure, the motion conversion assembly is at least partially located within the cylindrical structure, and the side wall of the cylindrical structure is provided with an avoidance groove arranged along the front-to-back direction, and the avoidance groove is located on the swinging path of the motion conversion assembly to avoid the motion conversion assembly.

[0044] In some embodiments, the avoidance groove is provided on the fixed arm.

[0045] In some embodiments, a motion conversion component is further included for being driven by a control component. The clamping structure also includes a connecting sleeve. The fixed arm is fixedly connected to the connecting sleeve. The motion conversion component is at least partially located in the connecting sleeve. One end of the movable arm extends into the connecting sleeve, and the other end is located outside the connecting sleeve. The motion conversion component achieves the closing and opening of the movable arm and the fixed arm by pulling the movable arm into the connecting sleeve and pushing the movable arm out of the connecting sleeve.

[0046] In some embodiments, the clamping assembly is a cylindrical structure, the motion conversion assembly is at least partially located within the cylindrical structure, and the cylindrical structure has a forward limiting portion to limit the forward extreme position of the motion conversion assembly.

[0047] In some embodiments, in the overlapping pre-clamping structure, the first hook portion is located in front of the second hook portion or the second hook portion is located in front of the first hook portion.

[0048] In some embodiments, the fixed arm has a first arm body, the first hook is bent from the front end of the first arm body toward the side of the movable arm, the movable arm has a second arm body, the second hook is bent from the second arm body toward the side of the fixed arm, wherein,

[0049] The bending angle a of the first hook portion is in the range of 45°≤a≤160°;

[0050] And / or, the bending angle b of the second hook portion is in the range of 45°≤b≤160°.

[0051] In some embodiments, the bending angle a of the first hook portion is in the range of: 55°≤a≤140°;

[0052] And / or, the bending angle b of the second hook portion is in the range of 55°≤b≤140°.

[0053] In some embodiments, the distal end of the first hook and / or the second hook has a pointed structure for piercing target tissue.

[0054] In some embodiments, the fixed arm and the movable arm are an integrally formed structure.

[0055] In some embodiments, the clamping structure is an integrally formed structure formed by laser cutting.

[0056] Based on the above objectives, an embodiment of the present application provides a pulling-type clamping device, which includes a clamping structure as described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a structural diagram of a clamping assembly in one embodiment of the present application, where the clamping assembly is in a pre-clamping state;

[0058] Figure 2 This is a structural schematic diagram of a clamping assembly in an open state in one embodiment of the present application;

[0059] Figure 3 This is a schematic diagram of an embodiment of the present application in which the second hook portion is located in front of the first hook portion;

[0060] Figure 4-7 This is a schematic diagram of a clipping assembly performing a closing operation on a large wound surface in one embodiment of the present application;

[0061] Figure 8 This is a schematic diagram of an embodiment of the present application in which the first hook portion is located in front of the second hook portion;

[0062] Figure 9 Schematic diagram of several different bending angles of the first hook portion and the second hook portion in one embodiment of the present application;

[0063] Figure 10-12 Schematic diagrams of the protruding structures on the first hook and the second hook in several different embodiments of the present application. To better illustrate the shape of the protruding structures, the fixed arm and the movable arm are circumferentially unfolded, and the first hook and the second hook have not yet been bent.

[0064] Figure 13 This is an exploded schematic diagram of a pull-type clamping device in one embodiment of the present application;

[0065] Figure 14 This is a schematic diagram of the internal structure of the clamping assembly in an embodiment of the present application when it is in an open state;

[0066] Figure 15 This is a schematic diagram of the connection structure between the motion conversion component and the control component within the pull-type clamping device in one embodiment of the present application;

[0067] Figure 16 This is a schematic diagram of a clamping assembly in a pre-clamping state in one embodiment of the present application;

[0068] Figure 17 and 18 They are Figure 16 Schematic diagram of the internal structure of the clamping assembly in the pre-clamping state and the open state;

[0069] Figure 19 This is a schematic structural diagram of the avoidance groove on the clamping assembly in one embodiment of the present application;

[0070] Figure 20 and 21Schematic diagrams of a clamping assembly in a pre-clamping state and an open state according to an embodiment of the present application;

[0071] Figure 22 for Figure 20 A schematic diagram of the internal structure of the clamping assembly when it is in a pre-clamping state;

[0072] Figure 23 This is a schematic diagram of the separation of the retention part and the separation part of the motion conversion component in one embodiment of the present application. DETAILED DESCRIPTION

[0073] The present invention will be further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions, and for those skilled in the art, it is not necessary to describe these related operations in detail. They will fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0074] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various embodiments. Furthermore, the steps or actions in the method description may be reordered or adjusted in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided solely for the purpose of clearly describing a particular embodiment and are not intended to be mandatory, unless otherwise specified.

[0075] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0076] Among existing clamping devices for treating wounds in the body of a subject (including but not limited to humans or animals), single-arm clamps (i.e., one fixed arm and one movable arm among two clamping arms), double-arm clamps (both clamping arms are movable arms), three-arm clamps (one fixed arm and two movable arms among three clamping arms), or similar devices may be used. These devices are somewhat effective in closing small wounds (i.e., wounds smaller than or roughly equal to the opening distance of the clamping device). However, when the wound size is much larger than the corresponding clamping device (this application refers to such wounds as large wounds), these existing clamping devices have difficulty in successfully pulling and clamping the tissues on the two opposite sides of such large wounds into one position.

[0077] Based on the above problems, some embodiments of the present application provide a traction-type clamping device. The clamping device can be used to achieve the closure of large wounds in the body of the treated subject (the size of the wound is larger than the normal opening and closing distance of the clamping device) to achieve the effects of hemostasis, wound recovery, etc. The traction type means that when the clamping device closes the tissues on both sides of the large wound, it is necessary to pull the tissues on both sides to the closing point over a large distance to form a closing effect. Although the existing clamping instruments also have a certain pulling effect on the tissues on both sides of the wound when closing small wounds, due to the small wound, the pulling distance is short and the pulling effect is not obvious. Here, the present application refers to the closing instrument that can pull the tissues on both sides of the large wound to the closing point as a traction-type clamping device.

[0078] Please refer to Figure 1 In one embodiment, the traction-type clamping device includes a clamping assembly 100, which is used to clamp tissues on both sides of the wound under the drive of the operator, so that the wound remains in a closed state for suturing or other operations to promote wound healing.

[0079] Please continue to refer to Figure 1 , the clamping assembly 100 includes a fixed arm 110 and a movable arm 120 that can move relative to the fixed arm 110. The fixed arm 110 is actively opened and closed without being controlled by the operator. For example, the fixed arm 110 is made of a hard material such as metal or hard plastic, or the fixed arm 110 is not provided with a structure that is easy to bend. The operator mainly realizes the opening and closing of the entire clamping assembly 100 through the movement of the movable arm 120. The front end of the fixed arm 110 has a first hook portion 111 that is bent toward the side where the movable arm 120 is located, and the front end of the movable arm 120 has a second hook portion 121 that is bent toward the side where the fixed arm 110 is located. As Figure 1 As shown, for the convenience of description, the present application defines the end of the entire clipping device closer to the operator as the back (B), and the other end as the front (F).

[0080] When clamping a large wound, the operator controls the movement of the movable arm 120 to achieve clamping and opening. The clamping assembly 100 has a pre-clamping state, a clamping state, and an opening state. Figure 1 It can be regarded as a schematic diagram of the pre-clamping state. Figure 2 It can be regarded as a schematic diagram of the open state, and the clamping state is the state when the clamping device pulls and clamps the tissues on both sides of the wound to one place, for example, you can refer to Figure 8 When the clamping assembly 100 is in the open state, please refer to Figure 2 , the movable arm 120 is opened relative to the fixed arm 110. When the clamping assembly 100 is in the pre-clamping state, please refer to Figure 3 The first hook 111 and the second hook 121 extend relative to each other, and the fixed arm 110 and the movable arm 120 have different lengths (i.e., their dimensions in the front-to-back direction). Therefore, the second hook 121 is located in front of the first hook 111, forming an overlapping pre-clamping structure. This overlapping pre-clamping structure enables the fixed arm 110 to securely engage the tissue on one side of the large wound. As the movable arm 120 pulls the tissue on the other side, the fixed arm 110 can pull the tissue on its side toward the movable arm 120, thereby closing the entire large wound. Although existing single-arm and three-arm clamps also have a substantially fixed arm that remains unchanged, during the clamping process, when the movable arm pulls the tissue on one side of the large wound, the fixed arm can easily fail to engage the tissue on the other side. Even though some clamping devices have a pointed structure at the end of the fixed arm, because these fixed arms only apply force unilaterally when pulling the tissue, it is difficult for a single fixed arm to secure the corresponding tissue before the fixed and movable arms are fully closed.

[0081] Of course, in addition to closing large wounds, the traction-type clipping device can also be used in closing small wounds.

[0082] This closing effect will be described in more detail below with reference to the accompanying drawings.

[0083] Please refer to Figure 4 The operator can use the endoscope to preliminarily locate the target large wound surface A, and open the movable arm 120 for the first time, preparing to control the clamping assembly 100 to fix the tissue on one side of the large wound surface A first.

[0084] Please refer to Figure 5After selecting the starting point for suturing, a pre-clamping operation is performed, causing the movable arm 120 to move relative to the fixed arm 110 to form a pre-clamping state. The purpose is to maintain the clamping assembly 100 in a non-released state and utilize the clamping assembly 100 with a differentiated length design to pre-clamp the tissue on one side of the large wound A (clamping the tissue without releasing the clamp). In this step, due to the length difference between the two clamping arms of the clamping assembly 100, the fixed arm 110 can be used as an anchor point during pre-clamping. The squeezing force of the movable arm 120 pulling the tissue allows the tooth tips of the fixed arm 110 to penetrate the tissue at the moment of pre-clamping to form an initial anchor point.

[0085] More specifically, if Figure 5 As shown by the middle arrow, the fixed arm 110 and the movable arm 120 can clamp the tissue in a relative manner, thereby forming clamping forces in two opposite directions. The limitation of the internal space at the intersection of the fixed arm 110 and the movable arm 120 leads to increased tension on the surface of the tissue. Under the action of tension, the tissue is more easily pierced and fixed by the bent part between the teeth of the fixed arm 110, thereby forming an effective hooking effect.

[0086] Please refer to Figure 6 After the pre-clamping is completed, a second opening operation can be performed. The operator can control the movable arm 120 to open again via the control handle (refer to the control handle of the clamping instrument in the prior art). Since the movable arm 120 can be directly controlled to open, it is easier to separate from the tissue. After the movable arm 120 is opened, the supporting endoscopic positioning function is used to adjust the spatial posture of the clamping assembly 100 so that the end of the movable arm 120 is accurately hooked to the tissue at the opposite edge of the large wound surface A.

[0087] Then, please refer to Figure 7 Once the movable arm 120 hooks onto the tissue on the opposite side of the large wound surface A, the clamping assembly can be closed using the control handle. During this process, the fixed arm 110 can continuously maintain the tissue anchoring state, preventing the tissue from falling off. This drives the tissue on one side of the large wound surface A, which is fixed by the fixed arm 110, to move toward the tissue on the other side. With the cooperation of the fixed arm 110 and the movable arm 120, the tissue on both sides of the large wound surface A is clamped and effectively sutured.

[0088] Furthermore, in the above Figure 1-7 The embodiment shown shows an example in which the movable arm 120 is longer than the fixed arm 110 in the closed state, so the second hook portion 121 is located in front of the first hook portion 111. However, in other embodiments, please refer to Figure 8In the closed state, the fixed arm 110 can also be longer than the movable arm 120, so the first hook 111 is located in front of the second hook 121, thereby forming an overlapping pre-clamping structure. The clamping structure can also be pre-clamped so that the fixed arm 110 first fixes the tissue on one side, and then controls the opening of the movable arm 120 to hook the tissue on the other side, and finally closes the clamping assembly 100 to promote the two sides of the tissue to approach and close each other.

[0089] Further, in order to form the first hook portion 111 and the second hook portion 121, please refer to Figure 9 In some embodiments, the fixed arm 110 includes a first arm body 112, and the first hook 111 bends from the front end of the first arm body 112 toward the movable arm 120. The movable arm 120 includes a second arm body 122, and the second hook 121 bends from the second arm body 122 toward the fixed arm 110.

[0090] In some embodiments, the bending angle a of the first hook portion 111 is in the range of 45°≤a≤160°; and / or the bending angle b of the second hook portion 121 is in the range of 45°≤b≤160°.

[0091] In other embodiments, the bending angle a of the first hook portion 111 is in the range of 55°≤a≤140°; and / or the bending angle b of the second hook portion 121 is in the range of 55°≤b≤140°. This bending angle limitation allows the fixed arm 110 and / or the movable arm 120 to prevent slipping through a locking effect after piercing the tissue, thereby providing more stable mechanical support when pulling the tissue and ensuring reliable clamping. Figure 9 , the fixed arm 110 has bending angles of 70°, 90°, and 110°, respectively. Similarly, the movable arm 120 can also have bending angles of 70°, 90°, and 110°.

[0092] Furthermore, in some embodiments, in order to make it easier for the fixed arm 110 and the movable arm 120 to penetrate into the tissue, the ends of the first hook 111 and / or the second hook 121 have a pointed structure that facilitates piercing the target tissue. The pointed structure is used to increase the sharpness of the ends of the fixed arm 110 and the movable arm 120, so that the single-point pressure of the fixed arm 110 and the movable arm 120 increases when penetrating the tissue, reducing the resistance to piercing the tissue mucosa, thereby making it easier to penetrate the tissue. The pointed structure may include but is not limited to the following shapes: Figure 10 The wave shape shown (the difference between each example is that the distance between the wave crest and the wave trough is different), Figure 11 The arrow shape and Figure 12 The double spike shape shown (the difference between each example is the height of the spikes) and so on.

[0093] In addition, in terms of the opening and closing control of the clamping assembly 100, in some embodiments, the traction clamping device further includes a motion conversion assembly and a control assembly. The motion conversion assembly and the clamping assembly form a clamping structure, which can achieve the clamping and release of the tissue under the drive of the control assembly. Figure 13-15 , an example of a motion conversion assembly 200 and a control assembly 300 is shown, but the motion conversion assembly 200 and the control assembly 300 shown in this application are not limited to the illustrated structures. Of course, in other embodiments, the pull-type clamping device may also include other related components according to functional requirements, and reference may be made to the prior art for this aspect.

[0094] The control assembly 300 is used to receive operator input to generate a force to control the clamping assembly 100. The operator's input to the control assembly 300 can be direct force and motion input, such as manually applying force, or electronically controlled, such as using a motor or other drive element to input the relevant force. The motion conversion assembly 200 is used to convert the force input by the control assembly 300 into motion of the movable arm 120.

[0095] In some embodiments, the motion conversion assembly 200 has a detachable portion (such as but not limited to Figure 15 The detachable portion 210 shown in FIG. 1 and the retention portion for being retained in the patient's body together with the clip assembly 100 (such as but not limited to Figure 13 The retention portion 220 shown). The detachment portion and the retention portion can be composed of one or more parts respectively. This division is based on the function of being detachably connected and does not mean that the retention portion and the detachment portion must be two separate parts. The retention portion is connected to the movable arm 120 to transmit the force that drives the movable arm 130 to move relative to the fixed arm 110 to the movable arm 120, for example, to drive the movable arm 120 to open and close relative to the fixed arm 110. The detachment portion is connected to the retention portion in a manner that can be detached from the retention portion during its movement toward the rear end, so that under the drive of the control component 300, the detachment portion and the retention portion can move as a whole, and when the detachment portion moves backward to the set position, the detachment portion and the retention portion can be detached, so that the retention portion and the clamping component are retained in the body of the treatment object, so that the wound surface remains in a closed state.

[0096] The control assembly is connected to the clamping assembly 100 in a manner that it can be separated from the clamping assembly 100 during its movement toward the rear end (such as but not limited to Figure 13The control assembly 300 is connected to the clamping assembly 100 as shown in the figure, so that under the control of the operator, the control assembly can drive the clamping assembly to move as a whole, and when the control assembly moves backward to the set position, the clamping assembly can be separated from the control assembly to retain the clamping assembly in the body of the treatment object. The control assembly is also connected to the detachment part (which can be but is not limited to Figure 13 The control assembly 300 is connected to the disengagement portion 220 as shown in the figure) to drive the retention portion and the disengagement portion to move in the front-to-rear direction, and during the backward movement, drive the disengagement portion to disengage from the retention portion.

[0097] Of course, the connection structure between the retention part and the movable arm 120, the connection structure between the retention part and the detachment part, the connection structure between the control component and the clamping component 100, and the connection structure between the control component and the detachment part are all relatively mature in the clamping instrument. In addition to the examples shown in this application, it can also be implemented by referring to the structure of the existing clamping instrument.

[0098] Some specific structural embodiments are listed below, but the present application is not limited to these embodiments.

[0099] Please refer to Figure 13 and 14 In some embodiments, the fixed arm 110 and the movable arm 120 are connected. This connection can be an integrally formed structure or the two can be independently manufactured and connected. The movable arm 120 has a bendable portion 123 that can bend under the influence of the retention portion, allowing the movable arm 120 to open and close relative to the fixed arm 110.

[0100] The bendable portion 123 can be made of a material or structure that is easier to bend and deform than other parts. For example, Figure 1 and 13 In some embodiments, the bendable portion 123 has at least two connecting units 1231 arranged along the length direction of the movable arm 120. Adjacent connecting units 1231 are connected by a connecting portion 1232. At least one side of the connecting portion 1232 is provided with a first slit 1233. The first slit 1233 extends from the connecting portion 1232 along the circumference of the movable arm 120 to the side of the movable arm 120, so that adjacent connecting units 1231 can be bent and deformed under the action of external force, such as Figure 1 and 13 The connecting portion 1232 can be located in the middle of adjacent connecting units 1231, and each connecting unit 1231 forms a chain-type connection, thereby having better bending and deformation capabilities.

[0101] In order to further improve the bending deformation ability and reset ability of the bendable portion 123, please continue to refer to Figure 1 and 13In some embodiments, each connecting unit 1231 may further have a second gap 1234, which runs through the outer wall and the inner wall of the movable arm 120, so that each connecting unit 1231 itself can bend and deform under the action of external force, and then under the dual action of the bending and deformation ability of the connecting unit 1231 itself and the bendable and deformable structure formed between adjacent connecting units 1231, the entire bendable portion 123 has better bending and deformation ability and reset ability.

[0102] The bendable portion 123 shown in the above embodiment can be directly processed on the movable arm 120 by laser cutting or other cutting processes, or can be manufactured separately and then fixedly connected to other parts of the movable arm 120.

[0103] Of course, the above embodiment is only an example of the bendable portion 123 , and the bendable portion 123 shown in this application may also adopt various existing forms of bendable and deformable structures.

[0104] In order to drive the movable arm 120 with the bendable portion 123 to bend, please refer to Figure 13-15 In some embodiments, the retention portion 210 includes a sliding block 211 and a rocker arm 212. The sliding block 211 is connected to the detachment portion 220 so as to be detachable from the detachment portion 220 during rearward movement of the detachment portion. One end of the rocker arm 212 is rotatably connected to the sliding block 211, and the other end is connected to the movable arm 120 to drive the flexible portion 123 to bend and reset when the sliding block 211 moves in the front-to-back direction.

[0105] Please refer to Figure 13 and 14 In some embodiments, the sliding block 211 may have a mounting shaft 2113, and the rear end of the rocker arm 212 may be assembled with the mounting shaft 2113 through an elliptical hole and may be capable of circular swing. The front end of the rocker arm 212 may be connected to the movable arm 120, and the connection may be a fixed connection or a movable connection. The clamping assembly 100 may form a cylindrical structure, and the sliding block 211 is disposed in the assembly cavity 101 of the cylindrical structure. When the sliding block 211 moves in the front-to-back direction in the clamping assembly 100, the rocker arm 212 may be driven to swing around the mounting shaft 2113, thereby controlling the bending and resetting of the movable arm 120. For example, Figure 14 As shown, when the sliding block 211 moves forward, the rocker arm 212 can drive the movable arm 120 to open. Conversely, when the sliding block 211 moves backward, the movable arm 120 and the fixed arm 110 can be driven to close.

[0106] Please refer to Figure 13In some embodiments, the sliding block 211 can be divided into a first block 2111 and a second block 2112. The first block 2111 and the second block 2112 are plugged and fixed to each other, which can reduce the manufacturing difficulty and also facilitate the installation of the rocker arm 212 on the sliding block 211. The mounting shaft 2113 can be provided on either the first block 2111 or the second block 2112 and blocked by the other, so that the rocker arm 212 provided on the mounting shaft 2113 will not fall off.

[0107] Of course, the above is only one way in which the motion conversion assembly 200 drives the movable arm 120. In other embodiments, other ways may be used instead. For example, please refer to Figure 16-18 In other embodiments, the motion conversion assembly 200 may include a sliding pendulum 214 and a connecting rod 215 connected to the control assembly 300. The movable arm 120 is fixedly connected to the sliding pendulum 214. This fixed connection can be an integrally formed structure or can be separately manufactured and then fixed to each other. The connecting rod 215 is used to transmit the forward and backward motion input by the control assembly 300 to the sliding pendulum 214. The clamping assembly 100 has a fixed shaft 102. For example, the fixed shaft 102 can be located on the fixed arm 110 or other part of the clamping assembly 100 (such as the support arm 140 described below). The sliding pendulum 214 has a sliding engagement portion 2141. The sliding engagement portion 2141 is arranged from front to back and tilted from the movable arm 120 side to the fixed arm 110 side. The sliding engagement portion 2141 forms a sliding engagement with the fixed shaft 102. The rear end of the sliding pendulum 214 is movably connected to the connecting rod 215, which is connected to the control assembly 300. When the connecting rod 215 moves in the forward and backward direction, the sliding block 214 swings around the fixed axis 102 and slides relatively, so that the movable arm 120 opens and closes relative to the fixed arm 110. Figure 17 When the connecting rod 215 moves downward, it drives the sliding pendulum 214 to move downward, thereby driving the movable arm 120 and the fixed arm 110 to close. Figure 18 When the connecting rod 215 moves upward, it drives the sliding pendulum block 214 to move upward and swing relative to the fixed shaft 102, thereby driving the movable arm 120 to open relative to the fixed arm 110.

[0108] The sliding fitting portion 2141 of the sliding pendulum block 214 can be as follows Figure 17 and 18 The slot shown is a slot that passes through the sliding pendulum block 214, which can also be a blind slot. The shape of the sliding fitting portion 2141 is set to have a certain curvature to better drive the movable arm 120 to open and close. In addition, in order to better reduce the interference of the connecting rod 215 on the movement of the sliding pendulum block 214, in some embodiments, please refer to Figure 17The sliding pendulum block 214 can be installed on the sliding shaft 2151 of the connecting rod 215 through an elongated hole 2142. The extension direction of the elongated hole 2142 is roughly the same as the extension direction of the sliding matching part 2141. In this way, when the sliding pendulum block 214 swings, the sliding pendulum block 214 can adaptively adjust its position relationship with the connecting rod 215 as needed to avoid the movement of the connecting rod 215 interfering with the movement of the sliding pendulum block 214, which makes it difficult for the sliding pendulum block 214 to swing in the set direction.

[0109] Please refer to Figure 16 In this embodiment, the clamping assembly 100 may further include a connecting sleeve 130, and the fixing arm 110 is fixedly connected to the connecting sleeve 130. The fixed connection may be an integrally formed structure or may be manufactured separately and then fixed to each other.

[0110] exist Figure 13-18 In the various embodiments shown, the clamping assembly 100 forms a cylindrical structure, and the conversion parts (such as the rocker arm 212 or the sliding pendulum block 214) of the motion conversion assembly 200 adopt a swinging or rotating method. These conversion parts have a motion trajectory toward the cavity wall of the assembly cavity 101 in the process of driving the movable arm 120 to move. When the clamping assembly 100 is a cylindrical structure, the conversion parts swing left and right or rotate inside the cylindrical structure, which requires that the inner diameter of the cylindrical structure (i.e., the radial dimension of the assembly cavity 101) must meet the swing space of the conversion parts, which causes the radial dimension of the cylindrical structure to become larger, and the larger radial dimension will increase the discomfort of the treatment subject when the entire clamping assembly 100 is inserted into the body of the treatment subject. Therefore, please refer to Figure 14 、 18 19. In some embodiments, the cavity wall of the assembly cavity 101 has an avoidance groove 103, which is located on the movement trajectory of the conversion part (such as the rocker arm 212 or the sliding pendulum block 214), especially on the swinging trajectory of the conversion part, so that a part of the conversion part can extend into the avoidance groove 103, thereby meeting the swinging or rotation requirements of the conversion part without expanding the radial size of the assembly cavity 101.

[0111] Please refer to Figure 14 、 18 and 19, the avoidance groove 103 can be provided on the side wall of the cylindrical structure, and the avoidance groove 103 can be provided along the front-rear direction.

[0112] Specifically in different embodiments, Figure 14 In the embodiment shown, the avoidance groove 103 can be provided on the fixed arm 110. Figure 18 In the illustrated embodiment, the avoidance groove 103 can be provided on the connecting sleeve 130. In addition, the avoidance groove 103 can also be provided at other positions of the clamping assembly 100.

[0113] Furthermore, in some other embodiments of the present application, other driving methods of the motion conversion assembly 200 to the movable arm 120 are provided. Figure 20-22 In other embodiments, the clamping assembly 100 further includes a connecting sleeve 130, to which the fixed arm 110 is fixedly connected. This fixed connection may be an integrally formed structure or may be separately manufactured and then fixed to each other. The motion conversion assembly 200 is at least partially located within the connecting sleeve 130, with one end of the movable arm 120 extending into the connecting sleeve 130 and the other end located outside the connecting sleeve 130. The motion conversion assembly 200 closes and opens the movable arm 120 and the fixed arm 110 by pulling the movable arm 120 into the connecting sleeve 130 and pushing the movable arm 120 out of the connecting sleeve 130.

[0114] Specifically, please refer to Figure 20-22 In some embodiments, the motion conversion assembly 200 may include a pull rod 216 that is fixedly connected to the movable arm 120 to pull the movable arm 120 into the connecting sleeve 130 and push the movable arm 120 forward and out of the connecting sleeve 130. When the movable arm 120 is pulled into the connecting sleeve 130, the movable arm 120 can move toward the fixed arm 110 under the pull of the pull rod 216 and the restraint of the connecting sleeve 130 to achieve closure with the fixed arm 110. When the movable arm 120 extends out of the connecting sleeve 130, it is no longer restrained by the connecting sleeve 130 and can be pushed by the pull rod 216 to open relative to the fixed arm 110.

[0115] The aforementioned embodiments mainly demonstrate how the motion conversion component 200 drives the movable arm 120 . However, in the present application, the motion conversion component 200 drives the movable arm 120 not limited to the above embodiments, and the structure shown in the prior art may also be adopted.

[0116] Furthermore, to limit the forward limit position of the motion conversion assembly 200, in some embodiments, the clamping assembly 100 is cylindrical, the motion conversion assembly 200 is at least partially located within the cylindrical structure, and the cylindrical structure has a forward limit portion. The forward limit portion is located in the forward path of the motion conversion assembly 200 to limit the forward limit position of the motion conversion assembly 200.

[0117] Please refer to Figure 13 and 14In some embodiments, the forward limiting portion is a limiting shaft 104, and the limiting shaft 104 is fixedly mounted on the clamping assembly 100, for example, mounted in the assembly cavity 101 of the clamping assembly 100, for example, can be mounted in the support arm 140 of the clamping assembly 100, and the support arm 140 can be located between the fixed arm 110 and the movable arm 120. The support arm 140 can be fixed to the fixed arm 110 and the movable arm 120, for example, an integrally formed structure or a separately manufactured and fixedly connected structure. When the movable arm 120 and the fixed arm 110 are separate structures, the support arm 140 can also be fixed only to the fixed arm 110. The front end of the sliding block 211 of the motion conversion assembly 200 may have a limiting groove 2114 that cooperates with the limiting shaft 104. When the sliding block 211 moves forward until the limiting groove 2114 contacts the limiting shaft 104 (such as Figure 14 As shown), the sliding block 211 stops moving forward. Of course, these are just some examples of limiting the forward limit position of the motion conversion assembly 200. In other embodiments, other existing forward limit structures can also be used to achieve this.

[0118] Furthermore, in terms of the detachable connection between the retention portion and the detachment portion 220, this application also provides some examples. Figure 15 and 23 In some embodiments, the detachment portion 220 (specifically, a detachment rod) includes a main body 221, a head 222, and a neck 223 connecting the head 222 and the main body 221. The retention portion 210 (specifically, the clamping head 213 of the retention portion 210) includes deformable legs 2131. The legs 2131 form a clamping cavity 2132 with an opening. The head 222 is accommodated in the clamping cavity 2132, and the neck 223 is inserted into the opening. During the process of the detachment portion 220 moving toward the rear end, especially when the detachment portion 220 moves to the position where the retention portion 210 can no longer move backward (when the motion conversion assembly 200 moves backward, the clamping assembly 100 clamps the tissue more and more tightly. When the clamping assembly 100 can no longer close due to the clamped tissue, the retention portion 210 can no longer move backward), the detachment portion 220 continues to move backward under the control of the operator, and its head 222 can push the support leg 2131 to deform outward, so that the detachment portion 220 is separated from the retention portion 210. In this embodiment, the clamping head 213 and the detachment rod ( Figure 15220) can be an integrally formed part, and a small amount of material can be left between the support leg 2131 and the main body 221 and / or between the cavity wall of the clamping cavity 2132 and the head 222 to form a narrow connecting rib 2134. The connecting rib 2134 not only ensures the connection between the clamping head 213 and the disengagement rod, but also can be gradually stretched under set conditions, and when the yield limit is reached, the connecting rib 2134 breaks, thereby achieving the separation of the clamping head 213 and the disengagement rod. Of course, the detachable connection between the disengagement portion 220 and the retention portion 210 can also adopt other structures in the prior art and is not limited to the embodiment shown.

[0119] When the retention portion 210 and the detachment portion 220 are detached, in order to keep the clamping assembly 100 in the clamped state, it is not expected that the retention portion 210 will move forward under the reaction force of the tissue to open the clamping assembly 100. Therefore, in some embodiments, the clamping assembly 100 has a locking portion, and the outer side of the support leg 2131 has a locking fitting portion. When the head 222 pushes the support leg 2131 to deform outward, the locking fitting portion and the locking portion form a lock to keep the clamping assembly 100 in the closed state. This locking effect can be achieved before, during or after the detachment portion 220 is separated from the retention portion 210. More specifically, in Figure 23 In the embodiment shown, the locking engagement portion is the card table 2133, and the locking portion is the locking window 105. Of course, in other embodiments, the locking engagement portion and the locking portion may also be implemented in other ways in the prior art and are not limited to the structure described in this embodiment.

[0120] In order to keep the clipping assembly 100 in the body of the treated subject, some embodiments also require external detachment, that is, detachment of the control assembly 300 and the clipping assembly 100. Figure 15In some embodiments, the control assembly 300 has a decoupling spring 310 and a traction line 320 (such as a steel wire, a steel rope or other existing lines used for traction) for connecting to the control handle. The traction line 320 is connected to the motion conversion assembly 200, for example, connected to the disengagement rod of the disengagement part 220, to drive the entire motion conversion assembly 200 to move forward and backward. The decoupling spring 310 is connected to the traction line 320. The clamping assembly 100 has a window 106, and the decoupling spring 310 is hung on the window 106 to connect the clamping assembly 100 to the control assembly 300. This connection can ensure that the control assembly 300 can control the forward and backward movement of the clamping assembly 100 before disengagement, and can also enable the decoupling spring 310 to separate from the window 106 during the movement of the traction line 320 to the rear end, so that the clamping assembly 100 and the control assembly 300 are separated. Specifically, after the clamping assembly 100 clamps the tissue, it cannot move backward along with the control assembly 300, thereby causing the unhooking spring 310 to disengage from the window 106 of the clamping assembly 100. Of course, this is merely an example of a detachable connection between the clamping assembly 100 and the control assembly 300. This detachable connection may also be implemented in other ways known in the art and is not limited to the structure described in this embodiment.

[0121] In addition, only the partial structures of the control component 300, the clamping component 100 and the motion conversion component 200 are introduced here. For other embodiments, please refer to Figure 15 The control assembly 300 may also include a rotating sleeve 330 and an outer tube 340. The traction wire 320 is inserted into the outer tube 340. The rotating sleeve 330, the detaching spring 310, the clamping assembly 100, and the motion conversion assembly 200 are connected as an integral structure. Under the control of the traction wire 320, the entire structure can rotate relative to the outer tube 340 to adjust the clamping direction. The outer tube 340 protects the traction wire 320 and other components within it. After detachment, the outer tube 340, the rotating sleeve 330, the traction wire 320, and the detachable portion 220 are removed from the patient's body.

[0122] Furthermore, in some embodiments, the control assembly 300 may also include a control handle located at the rear end of the entire device, and the control handle is used for the operator to control the clamping assembly 100 at the front end.

[0123] Back to Figure 1 and 2In the illustrated embodiment, the fixed arm 110 and the movable arm 120 may be integrally formed. This integrally formed structure means that the relevant structures are formed from a single part. For example, the fixed arm 110 and the movable arm 120 may be directly cut from a cylindrical substrate (such as a powder metallurgy sintered sleeve or other sleeve substrate) via laser cutting or other cutting processes (when a bendable portion 123 is present, the bendable portion 123 may also be cut integrally). Of course, in other embodiments, the fixed arm 110 and the movable arm 120 may be manufactured separately and then processed together, and they may or may not be fixed to each other, depending on specific needs.

[0124] For further information, please refer to Figure 1 and 2 In some embodiments, the clamping assembly 100 further includes a cylindrical connecting sleeve 130 (boxed in the figure). The connecting sleeve 130 is located at the rear ends of the fixed arm 110 and the movable arm 120 and is integrally formed with the fixed arm 110 and the movable arm 120. The connecting sleeve 130 is provided with a locking portion for forming a forward locking structure with the retention portion 210 and / or a window 106 for connecting to the control assembly 300 (such as the decoupling spring 310).

[0125] Please refer to Figure 1 and 2 In some embodiments, the support arm 140 is provided between the fixed arm 110 and the movable arm 120. The support arm 140 may also be formed as an integral structure with the fixed arm 110 and the movable arm 120. The support arm 140 may also be provided with some functional structures, such as a guide portion (such as a guide portion) for guiding the moving parts (such as the sliding block 211, the connecting rod 215, etc.) to move in the front-back direction. Figure 2 The guide groove 108 shown, or other forms of guide parts such as guide rails can also be used), the conversion member has a corresponding matching part (such as Figure 2 The sliding block 211 shown is provided with a protrusion 2115) that cooperates with the guide portion to limit the moving part to move in a manner guided by the guide portion.

[0126] For some examples, please refer to Figure 1 and 2 The entire clamping assembly 100 is an integrally formed structure formed by laser cutting.

[0127] In addition, please refer to Figure 1 and 2 In some embodiments, an observation window 107 is provided on the connecting sleeve 130 at a position opposite to the decoupling spring piece 310 , so as to observe the disengagement of the decoupling spring piece 310 and other internal conditions.

[0128] On the other hand, an embodiment of the present application provides a method for controlling a pull-type clamping device, wherein the pull-type clamping device is any of the above-mentioned pull-type clamping devices, and the method comprises:

[0129] Insertion step: inserting the front end of the pull-type clamping device into the patient's target cavity;

[0130] First opening steps: Figure 4 As shown, the motion conversion assembly 200 is driven to move toward the front end, driving the movable arm 120 to open to a set angle relative to the fixed arm 110;

[0131] Pre-clamping steps: Figure 5 As shown, the motion conversion assembly 200 is driven to move toward the rear end, driving the movable arm 120 and the fixed arm 110 to form a first closure. In this step, the disengagement portion 220 and the retention portion 210 remain connected, and the control assembly 300 and the clamping assembly 100 remain connected.

[0132] Second opening steps: Figure 6 As shown, the dynamic conversion assembly is driven to move toward the front end, driving the movable arm 120 to open to a set angle relative to the fixed arm 110;

[0133] Pull-on closure steps: Figure 7 As shown, the driving conversion assembly moves toward the rear end, driving the movable arm 120 to close again with the fixed arm 110. In this step, the disengaging portion 220 and the retaining portion 210 remain connected, and the control assembly 300 and the clamping assembly 100 remain connected.

[0134] Separation step: driving the control component 300 and the motion conversion component 200 to move toward the rear end, and causing the separation portion 220 and the retention portion 210 to separate, and the control component 300 and the clamping component 100 to separate.

[0135] In the manipulation method shown in the above embodiment, the first hook 111 of the fixed arm 110 can be inserted into the tissue on one side of the wound surface through the pre-clamping step, so that the tissue on this side is more firmly fixed on the fixed arm 110, and then the second opening step is performed to open the movable arm 120, so that the movable arm 120 is opened at a large angle, thereby hooking the tissue on the other side of the wound surface, and in the pulling and closing step, the tissues on both sides are pulled to the closing position, thereby achieving the closure of the large wound surface A.

[0136] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art can make several simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A pulling type clamping device, characterized in that: include: The clamping assembly comprises a fixed arm and a movable arm capable of moving relative to the fixed arm, the front end of the fixed arm having a first hook portion bent toward the side where the movable arm is located, and the front end of the movable arm having a second hook portion bent toward the side where the fixed arm is located; the clamping assembly has a pre-clamping state, a clamping state, and an open state; when the clamping assembly is in the pre-clamping state, the first hook portion and the second hook portion extend relative to each other, and the first hook portion is located in front of the second hook portion or the second hook portion is located in front of the first hook portion, forming an overlapping pre-clamping structure, so that the fixed arm can pierce and fix tissue on one side of the wound surface; When the clamping assembly is in the clamping state, the first hook portion and the second hook portion can pull the tissues on both sides of the wound surface closed; When the clamping assembly is in an open state, the movable arm is opened relative to the fixed arm; a motion conversion assembly comprising a detachment portion and a retention portion for being retained in the patient's body together with the clipping assembly, the detachment portion being connected to the retention portion in a manner capable of detaching from the retention portion during its rearward movement, the retention portion being connected to the movable arm to transmit a force to the movable arm that drives the movable arm to move relative to the fixed arm; and a control assembly connected to the clamping assembly in a manner that allows it to disengage from the clamping assembly during its movement toward the rear end; the control assembly is simultaneously connected to the disengagement portion to drive the retention portion and the disengagement portion to move in the front-to-rear direction.

2. The pull-type clamping device according to claim 1, wherein: The bending angle a of the first hook portion is in the range of 45°≤a≤160°; And / or, the bending angle b of the second hook portion is in the range of 45°≤b≤160°.

3. The pull-type clamping device according to claim 1, wherein: The bending angle a of the first hook portion is in the range of 55°≤a≤140°; And / or, the bending angle b of the second hook portion is in the range of 55°≤b≤140°.

4. The pulling-type clamping device according to any one of claims 1 to 3, characterized in that: The distal end of the first hook and / or the second hook has a pointed structure for piercing target tissue.

5. The pulling-type clamping device according to any one of claims 1 to 4, characterized in that: The fixed arm is connected to the movable arm, and the movable arm has a bendable portion, which can be bent under the drive of the retention portion, so that the movable arm can open and close relative to the fixed arm; The retention part includes a sliding block and a rocker arm, and the sliding block is connected to the detachment part in a manner that it can detach from the detachment part during the movement of the detachment part toward the rear end; one end of the rocker arm is rotatably connected to the sliding block, and the other end is connected to the movable arm to drive the flexible part to bend and reset when the sliding block moves in the front and rear directions.

6. The pulling-type clamping device according to any one of claims 1 to 4, characterized in that: The motion conversion component includes a sliding pendulum block and a connecting rod connected to the control component, and the movable arm is fixedly connected to the sliding pendulum block; the clamping component has a fixed axis, and the sliding pendulum block has a sliding fitting portion, and the sliding fitting portion is inclined from front to back and from one side of the movable arm to the side of the fixed arm, and the sliding fitting portion forms a sliding fit with the fixed axis, and the rear end of the sliding pendulum block is movably connected to the connecting rod, and the connecting rod is connected to the control component; during the movement of the connecting rod in the front and rear directions, the sliding pendulum block swings around the fixed axis and slides relatively, so that the movable arm opens and closes relative to the fixed arm.

7. The pull-type clamping device according to claim 5 or 6, characterized in that: The clamping assembly is a cylindrical structure, and the motion conversion assembly is at least partially located inside the cylindrical structure. The side wall of the cylindrical structure is provided with an avoidance groove arranged along the front-to-back direction. The avoidance groove is located on the rotation path of the motion conversion assembly to avoid the motion conversion assembly.

8. The pull-type clamping device according to claim 7, wherein: The avoidance groove is arranged on the fixed arm.

9. The pulling-type clamping device according to any one of claims 1 to 4, characterized in that: The clamping assembly also includes a connecting sleeve, the fixed arm is fixedly connected to the connecting sleeve, the motion conversion assembly is at least partially located in the connecting sleeve, one end of the movable arm extends into the connecting sleeve, and the other end is located outside the connecting sleeve. The motion conversion assembly realizes the closing and opening of the movable arm and the fixed arm by pulling the movable arm into the connecting sleeve and pushing the movable arm out of the connecting sleeve.

10. The pull-type clamping device according to any one of claims 1 to 9, characterized in that: The clamping assembly is a cylindrical structure, the motion conversion assembly is at least partially located in the cylindrical structure, and the cylindrical structure has a forward limiting portion to limit the forward extreme position of the motion conversion assembly.

11. The pulling-type clamping device according to any one of claims 1 to 10, characterized in that: The clamping assembly has a locking portion, the detachment portion has a main body, a head, and a neck connecting the head and the main body, the retention portion has a deformable support foot, and the outer side of the support foot has a locking fitting portion; the support foot forms a card cavity with an opening, the head is accommodated in the card cavity, and the neck is passed through the opening, so that during the movement of the detachment portion toward the rear end, the head can push the support foot to deform outward, so that the detachment portion is separated from the retention portion, and the locking fitting portion forms a lock with the locking portion to keep the clamping assembly in a closed state.

12. The pull-type clamping device according to any one of claims 1 to 11, characterized in that: The control component has a decoupling spring and a traction wire body for connecting to the control handle, and the traction wire body is connected to the motion conversion component to drive the motion conversion component to move forward and backward; the clamping component has a window, and the decoupling spring is hung on the window to connect the clamping component with the control component; the decoupling spring is connected to the traction wire body, and during the movement of the traction wire body to the rear end, the decoupling spring can be separated from the window to separate the clamping component and the control component.

13. The pull-type clamping device according to claim 1, wherein: The fixed arm and the movable arm are an integrally formed structure.

14. The pull-type clamping device according to claim 13, wherein: The clamping assembly also includes a cylindrical connecting sleeve, which is located at the rear ends of the fixed arm and the movable arm, and is an integrally formed structure with the fixed arm and the movable arm. The connecting sleeve is provided with a locking portion for forming a forward locking structure with the retention portion and / or a window for connecting with the control assembly.

15. The pull-type clamping device according to claim 13 or 14, characterized in that: The clamping assembly is an integrally formed structure formed by laser cutting.

16. A method for operating a pull-type clamping device, characterized in that: The pull-type clamping device is the pull-type clamping device according to any one of claims 1 to 15, and the control method includes: Insertion step: inserting the front end of the pull-type clamping device into the target cavity of the patient; First opening step: driving the motion conversion assembly to move toward the front end, causing the movable arm to open to a set angle relative to the fixed arm; Pre-clamping step: driving the motion conversion assembly to move toward the rear end, driving the movable arm and the fixed arm to form a first closure, during which the disengagement portion and the retention portion remain connected, and the control assembly and the clamping assembly remain connected; Second opening step: driving the motion conversion assembly to move toward the front end, causing the movable arm to open to a set angle relative to the fixed arm; Pulling and closing step: driving the motion conversion assembly to move toward the rear end, driving the movable arm to close again with the fixed arm, during which the disengaging portion and the retaining portion remain connected, and the control assembly and the clamping assembly remain connected; Separation step: driving the control component and the motion conversion component to move toward the rear end, and causing the disengagement portion and the retention portion to separate, and the control component and the clamping component to separate.

Images