A clamp head assembly and a traction clamp

Abstract

The present disclosure relates to the field of medical devices, and more specifically, to a forceps head assembly and a traction forceps. A forceps head assembly, the forceps head assembly includes a cable, an outer tube, a locking sleeve, and a movable forceps. The cable can movably shuttle inside the outer tube; the locking sleeve can movably sleeve outside the outer tube; the movable forceps is located at the distal end of the outer tube, and the distal end of the cable is connected to the movable forceps. The cable is configured to move relative to the outer tube under the action of an external force to drive the movable forceps to open or close; the locking sleeve is configured to move relative to the outer tube toward the distal end close to the outer tube under the action of an external force to sleeve the movable forceps and keep the movable forceps in a closed state. The forceps head assembly can clamp and pull diseased tissue, assisting doctors in expanding the surgical field of view, thereby reducing the operation time.

Description

Technical Field

[0001] The present disclosure relates to the field of medical instruments, and in particular to a forceps head assembly and a traction forceps. Background Art

[0002] EMR (endoscopic mucosal resection, EMR) was first used clinically in Japan to treat early gastric cancer. Before it was introduced to Japan, gastrectomy was the only treatment for early gastric cancer. Currently, this treatment method has been widely used. Endoscopic submucosal dissection (ESD) refers to the use of a modified needle knife under endoscopy to directly peel off the mucosa from the submucosal layer. It evolved from mucosal resection EMR. Due to its high complete resection rate and good safety, it has expanded the indications for the resection of early gastrointestinal cancer and other tumors, and has gradually become a widely accepted minimally invasive surgical treatment method.

[0003] Both ESD and EMR can remove lesions with an ordinary single-channel endoscope, eliminating the pain of laparotomy and organ removal. The disadvantage of EMR is that the technology cannot remove larger lesions in one piece, and the fragmented specimens removed are difficult to perform detailed pathological analysis, the tumor stage is unclear, and there is a high risk of tumor recurrence. Compared with laparotomy and previous endoscopic treatment methods such as EMR, ESD has the following advantages: 1. Less trauma; 2. Patients can receive multiple treatments in multiple locations; 3. Doctors can obtain complete tissue pathology specimens for analysis; 4. For tumors that are large in size and irregular in shape or combined with ulcers and scars, the resection rate is more than 96% to reduce the probability of recurrence.

[0004] However, ESD takes longer to operate than EMR, has greater risks, and is more difficult to operate. The operation time of EMR is about 20 minutes, while most ESD operations take 60-90 minutes. There are complications such as bleeding, perforation, stenosis, and postoperative infection, which affect its wider promotion and application. EMR rarely bleeds during surgery, but during ESD, if you are not careful, the visual field will be covered with blood, and you need to stop bleeding and flush the visual field continuously. The main steps of ESD surgery are: marking, submucosal injection, edge incision, stripping, and wound treatment. For some lesions in difficult areas of ESD treatment, repeated submucosal injections are usually used to provide a limited surgical field of view for subsequent stripping operations, but repeated injections can prolong the operation time and increase the risk of bleeding and perforation. Therefore, how to obtain a good "surgical field of view" during surgery has become the key to solving the above problems. Scholars from various countries have worked hard to find methods that can provide a good field of view for surgery and achieve safe and precise cutting and stripping operations. Summary of the invention

[0005] The purpose of the present disclosure is to provide a forceps head assembly and a traction forceps, which can clamp and pull diseased tissue, assist doctors in expanding the surgical field of view, and thus reduce the operation time.

[0006] The embodiments of the present disclosure are implemented as follows:

[0007] In a first aspect, an embodiment of the present disclosure provides a pliers head assembly, the pliers head assembly comprising a cable, an outer tube, a locking sleeve, and a movable pliers;

[0008] The cable can be movably shuttled in the outer tube; the locking sleeve can be movably sleeved outside the outer tube; the movable clamp is located at the far end of the outer tube, and the far end of the cable is connected to the movable clamp;

[0009] The cable is configured to move relative to the outer tube under the action of external force to drive the movable clamp to open or close; the locking sleeve is configured to move relative to the outer tube toward the distal end close to the outer tube under the action of external force to cover the movable clamp and keep the movable clamp in a closed state.

[0010] In an optional embodiment, the clamp head assembly further includes a movable sleeve;

[0011] Along the direction from the distal end of the outer tube to the proximal end of the outer tube, the locking sleeve and the movable sleeve are sequentially and movably sleeved outside the outer tube;

[0012] The distal end of the movable sleeve abuts against the proximal end of the locking sleeve, and the movable sleeve is configured to push the locking sleeve to move relative to the locking sleeve under the action of an external force.

[0013] In an optional embodiment, the forceps head assembly further includes a sleeve handle, which is sleeved outside the outer tube and connected to the proximal end of the movable sleeve.

[0014] In an optional embodiment, the cannula handle is fixedly connected to the proximal end of the movable cannula.

[0015] In a second aspect, an embodiment of the present disclosure provides a traction pliers, the traction pliers comprising an operating portion and the above-mentioned pliers head assembly;

[0016] The operating part is connected to the cable, and the operating part is configured to drive the cable to move relative to the outer tube under the action of external force to drive the movable clamp to open or close; or to drive the cable to rotate around the central axis of the cable under the action of external force to drive the movable clamp to rotate relative to the outer tube.

[0017] In an optional embodiment, the operating portion includes a handle and a movable portion;

[0018] A first channel and a second channel are provided on the handle along a preset direction; the proximal end of the cable passes through the first channel and then extends into the second channel, and the movable part can movably cooperate with the second channel and is detachably connected to the proximal end of the cable;

[0019] The movable portion is configured to drive the cable to move or rotate relative to the handle under the action of an external force.

[0020] In an optional embodiment, the operating portion further includes a first connecting member and a second connecting member;

[0021] The first connecting piece is connected to the proximal end of the cable, the second connecting piece is connected to the movable part, and the first connecting piece is threadedly connected to the second connecting piece.

[0022] In an optional embodiment, the outer diameter of the first connecting member is smaller than the inner diameter of the movable sleeve.

[0023] In an optional embodiment, the first connecting member is connected to the proximal end of the cable by laser welding.

[0024] In an optional embodiment, the operating portion further comprises a locking joint, which is threadedly connected to the distal end of the handle;

[0025] The locking joint is configured to rotate relative to the handle under the action of an external force and adjust the inner diameter of the first channel located at the distal end of the handle.

[0026] In an optional embodiment, a tapered joint is provided at the distal end of the handle, and the inner peripheral surface of the locking joint is a tapered surface that matches the tapered joint;

[0027] The conical joint comprises at least two connecting parts, and a space is arranged between any two adjacent connecting parts.

[0028] The beneficial effects of the embodiments of the present disclosure include:

[0029] The clamp head assembly includes a cable, an outer tube, a locking sleeve and a movable clamp. The cable can move relative to the outer tube under the action of an external force, and drive the movable clamp to open or close, so that the movable clamp can be driven to move by the movement of the cable to clamp the diseased tissue. The locking sleeve can move relative to the outer tube toward the distal end close to the outer tube under the action of an external force, and can maintain the closed state of the movable clamp by sleeve-mounting the movable clamp, thereby preventing the clamping effect between the movable clamp and the diseased tissue from disappearing during the process of pulling the diseased tissue through the outer tube; at the same time, it can prevent the movable clamp in a closed state from switching to an open state due to misoperation of the cable; thereby, the clamping force of the movable clamp on the diseased tissue can be maintained during the process of pulling the diseased tissue, so that the diseased tissue can be pulled and the surgical field of view can be improved to reduce the difficulty of the doctor's operation and reduce the time of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a structural schematic diagram of a clamp head assembly in an embodiment of the present disclosure;

[0032] Figure 2 is a cross-sectional view of a clamp head assembly according to an embodiment of the present disclosure;

[0033] Figure 3 is a cross-sectional view of a clamp head assembly in a closed state according to an embodiment of the present disclosure;

[0034] Figure 4 is a cross-sectional view of a clamp head assembly in an open state according to an embodiment of the present disclosure;

[0035] Figure 5 is a cross-sectional view of a traction clamp in a closed state in an embodiment of the present disclosure;

[0036] Figure 6 is a cross-sectional view of a traction clamp in an open state in an embodiment of the present disclosure;

[0037] Figure 7 for Figure 5 The enlarged schematic diagram of point VII in the middle;

[0038] Figure 8 for Figure 6 Enlarged schematic diagram of point VIII in the middle.

[0039] Icons: 100-clamp head assembly; 110-pull cable; 120-outer tube; 130-locking sleeve; 140-movable clamp; 150-movable sleeve; 160-sleeve handle; 141-upper clamp head; 142-lower clamp head; 143-clamp head connecting hinge; 200-traction clamp; 210-operating part; 211-handle; 212-movable part; 213-first channel; 214-second channel; 215-first connecting piece; 216-second connecting piece; 217-locking joint; 218-tapered joint; 219-connecting part. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure claimed for protection, but merely represents selected embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present disclosure.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the disclosed product is usually placed when in use, which are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0046] Please refer to Figure 1-Figure 4 , Figure 1 and Figure 2 The structure of the pliers head assembly in the embodiment of the present disclosure is shown. The pliers head assembly 100 includes a cable 110, an outer tube 120, a locking sleeve 130, an active clamp 140, an active sleeve 150 and a sleeve handle 160; wherein the cable 110 can movably shuttle in the outer tube 120; the active clamp 140 is located at the distal end of the outer tube 120, and the distal end of the cable 110 is connected to the active clamp 140; along the direction from the distal end of the outer tube 120 to the proximal end of the outer tube 120, the locking sleeve 130 and the active sleeve 150 are sequentially movably sleeved outside the outer tube 120, and the distal end of the active sleeve 150 abuts against the proximal end of the locking sleeve 130; the sleeve handle 160 is sleeved outside the outer tube 120 and connected to the proximal end of the active sleeve 150;

[0047] Figure 3 and Figure 4 The structure of the clamp head assembly in the embodiment of the present disclosure is shown. The clamp head assembly 100 includes a cable 110, an outer tube 120, a locking sleeve 130, an active clamp 140 and an active sleeve 150; wherein the cable 110 can move in and out of the outer tube 120; the active clamp 140 is located at the distal end of the outer tube 120, and the distal end of the cable 110 is connected to the active clamp 140; along the direction from the distal end of the outer tube 120 to the proximal end of the outer tube 120, the locking sleeve 130 is connected to the active clamp 140; The outer tube 120 and the movable sleeve 150 are movably sleeved outside the outer tube 120 in sequence, and the distal end of the movable sleeve 150 abuts against the proximal end of the locking sleeve 130; the movable clamp 140 includes an upper clamp head 141, a lower clamp head 142 and a clamp head connecting hinge 143, the upper clamp head 141 is hinged with the lower clamp head 142, the clamp head connecting hinge 143 is hinged with the upper clamp head 141 and the lower clamp head 142 at the same time, and the clamp head connecting hinge 143 is connected to the cable 110;

[0048] This embodiment provides a clamp head assembly 100, which includes a cable 110, an outer tube 120, a locking sleeve 130 and a movable clamp 140;

[0049] The cable 110 can be movably moved in the outer tube 120; the locking sleeve 130 can be movably sleeved outside the outer tube 120; the movable clamp 140 is located at the distal end of the outer tube 120, and the distal end of the cable 110 is connected to the movable clamp 140;

[0050] Please refer to Figure 3-Figure 4 , Figure 3 The pliers head assembly 100 is shown in a closed state. Figure 4 The pliers head assembly 100 is shown in an open state; the cable 110 is configured to move relative to the outer tube 120 under the action of an external force to drive the movable pliers 140 to open or close; the locking sleeve 130 is configured to move relative to the outer tube 120 toward the distal end close to the outer tube 120 under the action of an external force to cover the movable pliers 140 and keep the movable pliers 140 in a closed state.

[0051] It should be noted that, in the present embodiment, when the movable clamp 140 is provided, the movable clamp 140 includes an upper clamp head 141, a lower clamp head 142 and a clamp head connecting hinge 143, the upper clamp head 141 is hinged with the lower clamp head 142, the clamp head connecting hinge 143 is hinged with the upper clamp head 141 and the lower clamp head 142 at the same time, and the clamp head connecting hinge 143 is connected with the cable 110, thereby, through the movement of the cable 110 relative to the outer tube 120, the clamp head connecting hinge 143 can be driven to move, and then the upper clamp head 141 and the lower clamp head 142 can be driven to rotate around their hinges, so that the upper clamp head 141 and the lower clamp head 142 are close to each other to close the movable clamp 140, or the upper clamp head 141 and the lower clamp head 142 are separated from each other to open the movable clamp 140. Secondly, in other embodiments of the present disclosure, the movable clamp 140 can also adopt the structure in the prior art.

[0052] Throughout the text, the terms "distal end", "proximal end", etc. need to be explained. The explanation here is only for a better understanding of the present disclosure and cannot be understood as a limitation of the present disclosure. Generally, during the use of the pliers head assembly 100, the front end portion of the pliers head assembly 100 (with the distal end) Figure 1 The relative position in the figure refers to the left end of the clamp head assembly 100) will extend into the human body, and the rear end portion of the clamp head assembly 100 (with Figure 1 The relative position in the figure refers to the right end of the forceps head assembly 100) for medical personnel to operate. Therefore, the "distal end" can be understood as the front end portion of a part or component relatively close to the human body, and the "proximal end" can be understood as the rear end portion of a part or component relatively close to the outside of the human body. Of course, when it is not clearly stated which part or component is the "proximal end" or "distal end", it is assumed to refer to the proximal end or distal end of the entire forceps head assembly 100.

[0053] Please refer to Figure 1-Figure 4 The working principle of the clamp head assembly 100 is:

[0054] The clamp head assembly 100 includes a cable 110, an outer tube 120, a locking sleeve 130 and an active clamp 140. The cable 110 can move relative to the outer tube 120 under the action of an external force and drive the active clamp 140 to open or close, so that the active clamp 140 can be driven to move by the movement of the cable 110 to clamp the diseased tissue. The locking sleeve 130 is configured to move relative to the outer tube 120 toward the distal end close to the outer tube 120 under the action of external force, and can maintain the closed state of the movable clamp 140 by being sleeved outside the movable clamp 140, thereby preventing the clamping effect between the movable clamp 140 and the diseased tissue from disappearing during the process of pulling the diseased tissue through the outer tube 120; at the same time, it can prevent the movable clamp 140 in a closed state from switching to an open state due to misoperation of the pull cable 110; thereby, during the process of pulling the diseased tissue, the clamping force of the movable clamp 140 on the diseased tissue can be maintained, thereby pulling the diseased tissue and improving the surgical field of view, thereby reducing the doctor's operating difficulty and shortening the operation time.

[0055] Please refer to Figure 1 and Figure 2 In this embodiment, the pliers head assembly 100 further includes a movable sleeve 150. The locking sleeve 130 and the movable sleeve 150 are sequentially and movably sleeved outside the outer tube 120 in the direction from the distal end of the outer tube 120 to the proximal end of the outer tube 120; and the distal end of the movable sleeve 150 abuts against the proximal end of the locking sleeve 130, and the movable sleeve 150 is configured to push the locking sleeve 130 to move relative to the outer tube 120 under the action of an external force. It should be noted that the locking sleeve 130 and the movable sleeve 150 are sequentially arranged along the direction from the distal end of the outer tube 120 to the proximal end of the outer tube 120, and the movable sleeve 150 is configured to push the locking sleeve 130 to move relative to the locking sleeve 130 under the action of an external force. Such an arrangement can push the locking sleeve 130 to move relative to the outer tube 120 through the movement of the movable sleeve 150, and then enable the locking sleeve 130 to move to the position where the movable clamp 140 is sleeved. At the same time, since there is no connection between the locking sleeve 130 and the movable sleeve 150, the movable sleeve 150 can push the locking sleeve 130 to move toward the distal end of the outer tube 120, but cannot drive the locking sleeve 130 to move toward the proximal end of the outer tube 120. Therefore, when the locking sleeve 130 is sleeved outside the movable clamp 140 under the action of the movable sleeve 150, the movable clamp 140 can maintain the state of sleeved movable clamp 140.

[0056] In order to facilitate the movement of the movable sleeve 150, the pliers head assembly 100 also includes a sleeve handle 160, which is sleeved outside the outer tube 120 and connected to the proximal end of the movable sleeve 150. The sleeve handle 160 is configured to be held by an operator to facilitate the operator to push the locking sleeve 130 to move, or drive the movable sleeve 150 to separate from the outer tube 120.

[0057] When installing the sleeve handle 160 , since the sleeve handle 160 can be made of plastic, when connecting the sleeve handle 160 and the movable sleeve 150 , the sleeve handle 160 can be fixedly connected to the proximal end of the movable sleeve 150 .

[0058] Secondly, when connecting the movable clamp 140 and the cable 110, since the movement of the cable 110 can drive the movable clamp 140 to open or close, it is necessary to improve the stability of the connection between the movable clamp 140 and the cable 110 during use, so the movable clamp 140 and the cable 110 are connected by laser welding.

[0059] Please refer to Figure 1-Figure 8 , Figure 5 and Figure 6 The structure of the traction pliers in the embodiment of the present disclosure is shown. The traction pliers 200 includes an operating part 210 and a clamp head assembly 100; the operating part 210 includes a handle 211, a movable part 212 and a locking joint 217, the movable part 212 is movably connected to the handle 211, and the locking joint 217 is threadedly connected to the distal end of the handle 211; the clamp head assembly 100 includes an active clamp 140 disposed at the distal end of the clamp head assembly 100;

[0060] Figure 7 The structure of the handle in the embodiment of the present disclosure is shown. The handle 211 is provided with a first channel 213 and a second channel 214. The proximal end of the cable 110 passes through the first channel 213 and then extends into the second channel 214 and is connected to the first connecting member 215. The movable portion 212 can be movably matched with the second channel 214 and connected to the second connecting member 216. The first connecting member 215 is detachably connected to the second connecting member 216.

[0061] Figure 8 The structure of the handle in the embodiment of the present disclosure is shown. A conical joint 218 is provided at the distal end of the handle 211. The conical joint 218 includes at least two connecting parts 219. A gap is provided between any two adjacent connecting parts 219. The locking joint 217 is threadedly connected to the distal end of the handle 211, and the inner circumference of the locking joint 217 is a conical surface that matches the conical joint 218.

[0062] Based on the above-mentioned clamp head assembly 100 , the present disclosure further discloses a traction clamp 200 . The traction clamp 200 includes an operating portion 210 and the above-mentioned clamp head assembly 100 .

[0063] Among them, the operating part 210 is connected to the cable 110, and the operating part 210 is configured to drive the cable 110 to move relative to the outer tube 120 under the action of external force, so as to drive the movable clamp 140 to open or close; or to drive the cable 110 to rotate around the central axis of the cable 110 under the action of external force, so as to drive the movable clamp 140 to rotate relative to the outer tube 120.

[0064] Throughout the text, the terms "distal end" and "proximal end" need to be explained. The explanation here is only for a better understanding of the present disclosure and cannot be understood as a limitation of the present disclosure. Generally, during the use of the clamp head assembly 100, the front end portion of the traction clamp 200 (with the front end portion of the traction clamp 200) is Figure 5 The relative position in the figure refers to the upper end of the traction clamp 200) will be inserted into the human body, and the rear end of the traction clamp 200 (with Figure 1 The relative position in the figure refers to the lower end of the traction forceps 200) for medical personnel to operate. Therefore, the "distal end" can be understood as the front end portion of a part or component relatively close to the human body, and the "proximal end" can be understood as the rear end portion of a part or component relatively close to the outside of the human body. Of course, when it is not clearly stated which part or component is the "proximal end" or "distal end", it is assumed to refer to the proximal end or distal end of the entire traction forceps 200.

[0065] Please refer to Figure 1-Figure 8 The working process of the traction clamp 200 is as follows:

[0066] During the operation, the position of the movable forceps 140 relative to the diseased tissue is first adjusted, that is, the movable forceps 140 is in the correct position relative to the diseased tissue through the movement of the outer tube 120 and the rotation of the movable forceps 140 relative to the outer tube 120 driven by the operating part 210; then, the pull cable 110 is driven to move relative to the outer tube 120 by the operating part 210 to drive the movable forceps 140 to clamp the diseased tissue; then, the locking sleeve 130 is pushed by the sleeve handle 160 to move toward the distal end of the outer tube 120 relative to the outer tube 120 and cooperate with the movable forceps 140, so that the movable forceps 140 maintains a closed state of clamping the diseased tissue.

[0067] After the movable forceps 140 clamps the diseased tissue and can maintain a closed state under the cooperation of the locking sleeve 130 and the movable forceps 140, the connection between the operating part 210 and the pull cable 110 is released, and the movable sleeve 150 is removed from the outer tube 120, so that the movable forceps 140, the locking sleeve 130 and the outer tube 120 are located in the patient's body. Then, the diseased tissue can be pulled by pulling the outer tube 120, so as to help the doctor improve the surgical field of view and reduce the operation time.

[0068] It should be noted that, during the operation, a plurality of the above-mentioned traction forceps 200 may be provided to adjust the position of the diseased tissue in multiple directions, thereby adjusting the surgical field of view and shortening the operation time.

[0069] When the operating part 210 is set, the operating part 210 includes a handle 211 and a movable part 212; and along a preset direction ( Figure 5 and Figure 6The handle 211 is provided with a first channel 213 and a second channel 214; the proximal end of the cable 110 passes through the first channel 213 and then extends into the second channel 214, and the movable portion 212 can be movably matched with the second channel 214 and detachably connected with the proximal end of the cable 110; the movable portion 212 is configured to drive the cable 110 to move or rotate relative to the handle 211 under the action of an external force. Thus, by driving the movable portion 212 to move relative to the second channel 214 by an external force, the cable 110 can be driven to drive the movable clamp 140 to open or close; and by driving the movable portion 212 to rotate by an external force, the movable clamp 140 can be driven to rotate relative to the outer tube 120. Thus, the relative position of the movable clamp 140 can be adjusted. It should be noted that in this embodiment, the preset direction coincides with the central axis of the operating portion 210.

[0070] Secondly, when setting the first channel 213 and the second channel 214, the function of the first channel 213 is to allow the cable 110 to shuttle, and the function of the second channel 214 is to allow the movable part 212 to move and rotate. Therefore, the first channel 213 has an inner cavity adapted to the cable 110, and similarly, the second channel 214 has an area for the movable part 212 to move. Thus, the size of the first channel 213 can be smaller than that of the second channel 214. Such a setting allows the movable part 212 to move only in the second channel 214. Therefore, the size of the second channel 214 can be adjusted to limit the travel of the movable part 212.

[0071] In addition, when the movable portion 212 is provided, in the present embodiment, the movement of the movable portion 212 along the preset direction toward the distal end of the operating portion 210 can drive the cable 110 to move toward the distal end of the outer tube 120, and such movement can open the movable clamp 140; similarly, when the movable portion 212 moves along the preset direction toward the proximal end of the operating portion 210, it can drive the cable 110 to move toward the proximal end of the outer tube 120, and such movement can close the movable clamp 140. In other embodiments of the present disclosure, other configurations can be used, so that the movement of the movable portion 212 along the preset direction toward the distal end of the operating portion 210 drives the cable 110 to move toward the proximal end of the outer tube 120 and drives the movable clamp 140 to close; and the movement of the movable portion 212 along the preset direction toward the proximal end of the operating portion 210 drives the cable 110 to move toward the distal end of the outer tube 120 and drives the movable clamp 140 to open.

[0072] Please refer to Figure 7In this embodiment, the operating part 210 further includes a first connecting member 215 and a second connecting member 216; the first connecting member 215 is connected to the proximal end of the cable 110, the second connecting member 216 is connected to the movable part 212, and the first connecting member 215 and the second connecting member 216 are threadedly connected. Thus, the cable 110 and the movable part 212 can be connected by the first connecting member 215 and the second connecting member 216, and since the second connecting member 216 and the second connecting member 216 are threadedly connected, when the connection between the movable part 212 and the cable 110 is released, the second connecting member 216 connected to the movable part 212 is driven by an external force to rotate relative to the first connecting member 215 connected to the cable 110, so that the first connecting member 215 and the second connecting member 216 can be separated, thereby releasing the connection between the movable part 212 and the cable 110.

[0073] At the same time, when the connection between the movable part 212 and the cable 110 is released, it is necessary to make the second connecting member 216 connected to the movable part 212 rotate relative to the first connecting member 215 connected to the cable 110. Therefore, in order to prevent the cable 110 and the first connecting member 215 from rotating synchronously with the movable part 212 when the movable part 212 rotates, the operating part 210 also includes a locking joint 217, and the locking joint 217 is threadedly connected to the distal end of the handle 211. The function of the locking joint 217 is to lock the outer tube 120 and the cable 110 at the distal end of the handle 211 to limit the rotation of the outer tube 120 and the cable 110, thereby ensuring that the rotation of the movable part 212 will not drive the cable 110 to rotate synchronously.

[0074] For details, please refer to Figure 8In order to enable the locking joint 217 to have a rotational state of locking the cable 110 and the outer tube 120, and a state in which the cable 110 and the outer tube 120 can move relative to the handle 211, the locking joint 217 is configured to be able to rotate relative to the handle 211 under the action of an external force, and to adjust the inner diameter of the first channel 213 located at the distal end of the handle 211. A conical joint 218 is provided at the distal end of the handle 211, and the inner circumferential surface of the locking joint 217 is a conical surface that cooperates with the conical joint 218; the conical joint 218 includes at least two connecting parts 219, and a gap is provided between any two adjacent connecting parts 219. Therefore, when it is necessary to restrict the movement of the outer tube 120 and the cable 110, the locking joint 217 can be rotated to make the locking joint 217 move toward the proximal end of the handle 211, and after the inner circumferential surface of the locking joint 217 is matched with the conical joint 218, the interval between the connecting parts 219 of the conical joint 218 is gradually reduced, thereby reducing the inner diameter of the first channel 213, so that the inner wall of the first channel 213 located at the distal end of the handle 211 is clamped with the outer tube 120, and the cable 110 is clamped with the inner wall of the outer tube 120, thereby restricting the rotation of the cable 110 and the outer tube 120; similarly, when the outer tube 120 and the cable 110 are When 110 needs to be able to move relative to the handle 211, the locking joint 217 is rotated to make the locking joint 217 move toward the distal end of the handle 211, and after the inner circumferential surface of the locking joint 217 is disengaged from the conical joint 218, the interval between the connecting parts 219 of the conical joint 218 gradually returns to the initial interval, thereby increasing the inner diameter of the first channel 213, so that the inner wall of the first channel 213 located at the distal end of the handle 211 can be movably matched with the outer tube 120, and at the same time, the cable 110 can be movably matched with the inner wall of the outer tube 120, thereby canceling the restriction on the cable 110 and the outer tube 120.

[0075] In addition, when connecting the cable 110 and the first connecting member 215 , in order to improve the connection stability between the first connecting member 215 and the cable 110 , the first connecting member 215 can be connected to the proximal end of the cable 110 by laser welding.

[0076] Please refer to Figure 1-Figure 8 In summary, the operation steps of the traction clamp 200 are as follows:

[0077] First, the position of the movable forceps 140 relative to the diseased tissue is adjusted so that the movable forceps 140 is in the correct position relative to the diseased tissue; if the locking joint 217 is in the locked state, the movement of the outer tube 120 relative to the handle 211 is restricted, and the outer tube 120 is driven by the handle 211 to move relative to the movable sleeve 150, so that the position of the movable forceps 140 relative to the movable sleeve 150 can be adjusted, and at the same time, the outer tube 120 is driven by the handle 211 to rotate relative to the movable sleeve 150, so that the angle of the movable forceps 140 relative to the movable sleeve 150 can be adjusted. If the movement of the outer tube 120 relative to the handle 211 is not restricted by the locking joint 217, the cable 110 can be driven to rotate by the movable part 212, so that the angle of the movable forceps 140 relative to the movable sleeve 150 can be adjusted;

[0078] Then, the movable portion 212 moves in the second channel 214 to drive the movable clamp 140 to clamp the diseased tissue. After clamping the diseased tissue, the locking sleeve 130 is pushed by the sleeve handle 160 to move toward the distal end of the outer tube 120 relative to the outer tube 120 and cooperate with the movable clamp 140, so that the movable clamp 140 maintains a closed state of clamping the diseased tissue. It should be noted that the movement restriction of the locking joint 217 on the cable 110 and the outer tube 120 needs to be cancelled at this time.

[0079] After the movable forceps 140 clamps the diseased tissue and can maintain the closed state under the cooperation of the locking sleeve 130 and the movable forceps 140, it is necessary to release the connection between the operating part 210 and the cable 110. Specifically, the locking joint 217 is rotated so that the outer tube 120 is locked at the distal end of the handle 211. At this time, the movement of the outer tube 120 and the cable 110 is restricted. Then, the movable part 212 is rotated so that the first connecting member 215 is disconnected from the second connecting member 216. The locking joint 217 is rotated to cancel the locking effect of the locking joint 217 on the outer tube 120, and the cable 110 and the first connecting member 215 are extended from the first channel 213, so as to remove the handle 211.

[0080] By driving the sleeve handle 160 to move toward the proximal end of the outer tube 120, the movable sleeve 150 and the sleeve handle 160 are removed, so that the movable clamp 140, the locking sleeve 130 and the outer tube 120 are located in the patient's body. It should be noted that during use, multiple traction clamps 200 can be set. The operation steps of multiple traction clamps 200 are as above, so they are not repeated here. Then, the diseased tissue can be pulled by pulling the outer tube 120 to help the doctor improve the surgical field of view and reduce the operation time.

[0081] Please refer to Figure 1-Figure 8 Based on the above content, the traction forceps 200 provided in the present disclosure can also be configured to remove the esophageal stent in the body, and the steps are as follows:

[0082] Controlling the traction forceps 200 to clamp the retrieval line at the distal end of the esophageal stent;

[0083] First, a traction forceps 200 is extended into the esophagus and moved toward the distal end of the esophageal stent. Then, the position of the movable forceps 140 relative to the retrieval line at the distal end of the esophageal stent is adjusted so that the movable forceps 140 is in the correct position relative to the retrieval line at the distal end of the esophageal stent. If the locking joint 217 is in a locked state, the movement of the outer tube 120 relative to the handle 211 is restricted. By driving the outer tube 120 relative to the movable sleeve 150 through the handle 211, the position of the movable forceps 140 relative to the movable sleeve 150 can be adjusted. At the same time, by driving the outer tube 120 relative to the movable sleeve 150 through the handle 211, the angle of the movable forceps 140 relative to the movable sleeve 150 can be adjusted. If the movement of the outer tube 120 relative to the handle 211 is not restricted by the locking joint 217, the pull cable 110 can be driven to rotate through the movable part 212, thereby adjusting the angle of the movable forceps 140 relative to the movable sleeve 150.

[0084] Then, the movable portion 212 moves in the second channel 214 to drive the movable clamp 140 to clamp the retrieval line at the distal end of the esophageal stent. After the retrieval line at the distal end of the esophageal stent is clamped, the locking sleeve 130 is pushed by the sleeve handle 160 to move toward the distal end of the outer tube 120 relative to the outer tube 120 and cooperate with the movable clamp 140, so that the movable clamp 140 maintains the closed state of clamping the retrieval line at the distal end of the esophageal stent. It should be noted that at this time, the movement restriction of the locking joint 217 on the cable 110 and the outer tube 120 needs to be cancelled.

[0085] After the movable clamp 140 clamps the retrieval line at the distal end of the esophageal stent and the locking sleeve 130 and the movable clamp 140 are able to maintain the closed state, it is necessary to release the connection between the operating part 210 and the cable 110. Specifically, the locking joint 217 is rotated so that the outer tube 120 is locked at the distal end of the handle 211. At this time, the movement of the outer tube 120 and the cable 110 is restricted. Then, the movable part 212 is rotated so that the first connecting member 215 is disconnected from the second connecting member 216. The locking joint 217 is rotated to cancel the locking effect of the locking joint 217 on the outer tube 120, and the cable 110 and the first connecting member 215 are extended from the first channel 213, so as to remove the handle 211.

[0086] The movable sleeve 150 and the sleeve handle 160 are removed by driving the sleeve handle 160 to move toward the proximal end of the outer tube 120 , so that the movable forceps 140 , the locking sleeve 130 and the outer tube 120 are located in the patient's body.

[0087] Subsequently, another traction forceps 200 is extended into the esophagus and moves toward the proximal end of the esophageal stent, and then the traction forceps 200 are controlled to clamp the retrieval line at the proximal end of the esophageal stent; it should be noted that the operation steps for clamping the retrieval line at the proximal end of the esophageal stent are the same as the operation steps for clamping the retrieval line at the distal end of the esophageal stent, so they will not be repeated here; in addition, the above-mentioned operation method can be adopted to first clamp the retrieval line at the distal end of the esophageal stent and then clamp the retrieval line at the proximal end of the esophageal stent; or the retrieval line at the proximal end of the esophageal stent can be clamped first and then the retrieval line at the distal end of the esophageal stent. Secondly, multiple traction forceps 200 can be used to clamp the retrieval line at the distal end of the esophageal stent and the retrieval line at the proximal end of the esophageal stent.

[0088] Subsequently, the traction forceps 200 that drives the retrieval line that clamps the distal end of the esophageal stent moves in the direction from the proximal end to the distal end of the esophageal stent. At the same time, the traction forceps 200 that drives the retrieval line that clamps the proximal end of the esophageal stent moves in the direction from the distal end to the proximal end of the esophageal stent. As a result, the interval between the retrieval line at the distal end and the retrieval line at the proximal end of the esophageal stent increases, so that the esophageal stent is elongated. At this time, the outer diameter of the elongated esophageal stent is smaller than the inner diameter of the esophagus, so that the esophageal stent can be removed.

[0089] The above are only specific embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A traction clamp, characterized in that: The traction pliers include an operating portion and a pliers head assembly; The pliers head assembly comprises a cable, an outer tube, a locking sleeve and an active pliers; the cable can be movably shuttled in the outer tube; the locking sleeve can be movably sleeved outside the outer tube; the active pliers is located at the distal end of the outer tube, and the distal end of the cable is connected to the active pliers; the cable is configured to move relative to the outer tube under the action of an external force to drive the active pliers to open or close; the locking sleeve is configured to move relative to the outer tube toward the distal end close to the outer tube under the action of an external force to sleeve the active pliers and keep the active pliers in a closed state; the pliers head assembly also comprises an active sleeve; along the direction from the distal end of the outer tube to the proximal end of the outer tube, the locking sleeve and the active sleeve are movably sleeved outside the outer tube in sequence; the distal end of the active sleeve abuts against the proximal end of the locking sleeve, and the active sleeve is configured to push the locking sleeve to move relative to the locking sleeve under the action of an external force; The operating part is connected to the cable, and the operating part is configured to drive the cable to move relative to the outer tube under the action of external force, so as to drive the movable clamp to open or close; and to drive the cable to rotate around the central axis of the cable under the action of external force, so as to drive the movable clamp to rotate relative to the outer tube; The operating part includes a handle and a movable part; along a preset direction, a first channel and a second channel are opened on the handle; the proximal end of the cable passes through the first channel and then extends into the second channel, and the movable part can be movably matched with the second channel and detachably connected to the proximal end of the cable; the movable part is configured to drive the cable to move or rotate relative to the handle under the action of an external force; The operating portion further comprises a locking joint, which is threadedly connected to the distal end of the handle; the locking joint is configured to rotate relative to the handle under the action of an external force and adjust the inner diameter of the first channel at the distal end of the handle; A conical joint is arranged at the distal end of the handle, and the inner peripheral surface of the locking joint is a conical surface matching with the conical joint; the conical joint comprises at least two connecting parts, and a gap is arranged between any two adjacent connecting parts.

2. The traction clamp according to claim 1, characterized in that: The pliers head assembly also includes a sleeve handle, which is sleeved outside the outer tube and connected to the proximal end of the movable sleeve.

3. The traction clamp according to claim 2, characterized in that: The sleeve handle is fixedly connected to the proximal end of the movable sleeve.

4. The traction clamp according to claim 1, characterized in that: The operating part also includes a first connecting member and a second connecting member; The first connecting member is connected to the proximal end of the pull cable, the second connecting member is connected to the movable portion, and the first connecting member and the second connecting member are threadedly connected.

5. The traction clamp according to claim 4, characterized in that: The outer diameter of the first connecting member is smaller than the inner diameter of the movable sleeve.

6. The traction clamp according to claim 4, characterized in that: The first connecting member is connected to the proximal end of the cable by laser welding.

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