A ligation device

Abstract

The application discloses a ligation device, which comprises a ligation ring assembly, a ligation ring and a ligation ring fixing part, the ligation ring fixing part is in a cylindrical shape, the ligation ring is elastic, and the ligation ring in a stretched state is sleeved on the outer peripheral surface of the ligation ring fixing part; the ligation ring releasing assembly comprises a barrel body and a control part, the ligation ring releasing assembly is provided with a negative pressure suction channel or a clamping part to provide an acting force for leading a target object to be ligated into the barrel mouth of the barrel body, the ligation ring fixing part is sleeved on the inner side of the barrel mouth of the barrel body, and the control part can drive the relative movement of the ligation ring fixing part and the barrel body to make the ligation ring fixing part retract to the inner side of the barrel body, so that the ligation ring is separated from the ligation ring fixing part. Strong suction or clamping force increases the pulling effect on the lesion, the ligation ring is automatically tightened by using the self-elasticity of the ligation ring, the ligation is realized, the operation is more convenient, and the operation risk is reduced.

Description

Technical Field

[0001] The present invention is used in the field of medical equipment, and particularly relates to a ligature device. Background Art

[0002] Early gastrointestinal cancer and submucosal tumors are common gastrointestinal tumors. Early diagnosis and treatment of tumors are of great significance to the patient's prognosis, family and society. With the development of endoscopic technology, endoscopic minimally invasive surgery can remove these tumors with minimal invasiveness and achieve clinical cure. At present, this type of endoscopic minimally invasive surgical method mainly includes endoscopic submucosal dissection (ESD), endoscopic full-thickness resection (EFR), endoscopic submucosal tumor resection and endoscopic tunnel resection (STER). These surgical methods have high technical requirements for the operator and high risks, making them difficult to popularize in most hospitals. In particular, there are controversies about endoscopic minimally invasive resection of submucosal tumors of the gastrointestinal tract. (1) ESD, EFR and STER are difficult to remove tumors without damaging the tumor capsule, and it is difficult to achieve R0 resection (R0 is no residue under the microscope after resection); (2) The surgical risk is high, especially EFR, which is challenging to deal with perforation and can endanger the patient's life in severe cases. Therefore, it is particularly important to explore a surgical method that is simple, quick, effective, and safe for the popularization of technology. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art by providing a ligation device. This minimally invasive procedure, using this device, eliminates the more complex procedures of minimally invasive procedures such as ESD, EFR, and STER. The device is simple and quick to operate, significantly reducing operative time and intraoperative complications. The device can lift mucosal lesions, particularly submucosal tumors, by suction or clamping, and then ligate and remove them from the root of the lesion. This method ensures that the lesion itself is not directly contacted, thus preserving the integrity of the lesion, particularly the submucosal tumor, as much as possible. This significantly increases the probability of RO removal. The device, which performs ligation and removal, is simple to operate, without complex steps, and the technology is readily accessible.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] In a first aspect, a ligation device comprises

[0006] The ligature ring assembly comprises a ligature ring and a ligature ring fixing piece, wherein the ligature ring fixing piece is cylindrical and elastic, and the ligature ring in a stretched state is sheathed on the outer circumference of the ligature ring fixing piece;

[0007] The ligature ring release assembly includes a barrel body, a negative pressure suction channel and a control component. The negative pressure suction channel is connected to the barrel body to provide a force to suck the target object to be ligated from the barrel mouth of the barrel body. The ligature ring fixing piece is sleeved on the inner side of the barrel mouth of the barrel body. The control component can drive the ligature ring fixing piece and the barrel body to move relative to each other so that the ligature ring fixing piece is retracted toward the inner side of the barrel body to detach the ligature ring from the ligature ring fixing piece.

[0008] In a second aspect, a ligation device comprises

[0009] The ligature ring assembly comprises a ligature ring and a ligature ring fixing piece, wherein the ligature ring fixing piece is cylindrical and elastic, and the ligature ring in a stretched state is sheathed on the outer circumference of the ligature ring fixing piece;

[0010] The ligature ring release assembly includes a barrel body, a clamping component and a manipulation component. The clamping component extends into the barrel body to provide a force to pull the target object to be ligated into the barrel mouth of the barrel body. The ligature ring fixing piece is sleeved on the inner side of the barrel mouth of the barrel body. The manipulation component can drive the ligature ring fixing piece and the barrel body to move relative to each other so that the ligature ring fixing piece is retracted toward the inner side of the barrel body to detach the ligature ring from the ligature ring fixing piece.

[0011] In certain implementations of the first aspect or the second aspect, the proximal end of the ligature ring fixing piece is sleeved on the inner side of the barrel mouth of the barrel body, the ligature ring is sleeved on the distal end of the ligature ring fixing piece, the ligature ring is located outside the barrel mouth of the barrel body, and the outer diameter of the ligature ring is greater than the inner diameter of the barrel mouth of the barrel body.

[0012] In certain implementations of the first aspect or the second aspect, the inner surface of the ligature ring is provided with thorns, and the ligature ring fixing piece is provided with avoidance notches at positions corresponding to the thorns.

[0013] In certain implementations of the first aspect or the second aspect, a plurality of support members are provided on the ligation ring.

[0014] In certain implementations of the first aspect or the second aspect, the support member is embedded in the ligation ring or protrudes from the outer surface of the ligation ring.

[0015] In certain implementations of the first or second aspect, a plurality of ligating rings are provided, and the plurality of ligating rings are sequentially sleeved on the outer circumferential surface of the ligating ring fixing piece along the relative movement direction between the ligating ring fixing piece and the barrel body.

[0016] In some implementations of the first aspect or the second aspect, the operating component comprises a pulling member, and the barrel is provided with a pulling member through hole, the pulling member extends into the barrel through the pulling member through hole and is connected with the ligation ring fixing member.

[0017] In some implementations of the first aspect or the second aspect, a hook is arranged at a distal end of the pulling member, and a hook hole for connecting the hook is arranged on the ligation ring fixing member.

[0018] In some implementations of the first aspect or the second aspect, a groove for guiding the pulling member is arranged on an inner wall of the barrel.

[0019] In some implementations of the first aspect or the second aspect, further comprising

[0020] an endoscope, the barrel is provided with an endoscope sleeve, and a distal end of the endoscope is sleeved with the endoscope sleeve;

[0021] an endoscope fixing member, detachably connected with a proximal end of the endoscope, and provided with a first negative pressure channel interface;

[0022] an operating component sleeve, connected between the endoscope fixing member and the barrel, the operating component is arranged in the operating component sleeve, and a proximal end of the operating component is connected with a handle outside the endoscope fixing member.

[0023] In some implementations of the first aspect or the second aspect, the endoscope fixing member is provided with an operating component channel, the operating component channel is connected with the operating component sleeve, and an operating component limiting member is arranged in the operating component channel.

[0024] In some implementations of the first aspect or the second aspect, the endoscope fixing member is provided with a clamping groove and a tie that can limit a handle of the endoscope in the clamping groove.

[0025] In some implementations of the first aspect, further comprising

[0026] an endoscope, the barrel is provided with an endoscope sleeve, and a distal end of the endoscope is sleeved with the endoscope sleeve;

[0027] an endoscope fixing member, detachably connected with a proximal end of the endoscope, and provided with a first negative pressure channel interface;

[0028] an operating component sleeve, connected between the endoscope fixing member and the barrel, the operating component is arranged in the operating component sleeve, and a proximal end of the operating component is connected with a handle outside the endoscope fixing member.

[0029] The second negative pressure channel interface is arranged on the barrel body, and the negative pressure suction channel comprises a pipeline connecting the first negative pressure channel interface and the second negative pressure channel interface.

[0030] In some implementations of the second aspect, further comprising

[0031] An endoscope is arranged, and the barrel body is provided with an endoscope sleeve, and a distal end of the endoscope is sleeved with the endoscope sleeve;

[0032] An endoscope fixing member is detachably connected with a proximal end of the endoscope;

[0033] A control component sleeve is connected between the endoscope fixing member and the barrel body, the control component is arranged in the control component sleeve, and a proximal end of the control component is connected with a handle outside the endoscope fixing member;

[0034] The clamping component extends into the barrel body through an endoscope working channel of the endoscope.

[0035] One of the technical solutions has at least one of the following advantages or beneficial effects: when in use, the barrel opening of the barrel body of the ligation device is close to and aligned with the target object to be ligated, and then the target object is introduced into the barrel body under negative pressure or traction. After the target object is completely introduced into the barrel body, the relative movement between the ligation ring fixing member and the barrel body is realized through the control component of the ligation device, so that the ligation ring fixing member is retracted to the inside of the barrel body, and finally the ligation ring is separated from the ligation ring fixing member. The pushed-out ligation ring is retracted to surround the target object introduced into the barrel body without the support of the ligation ring fixing member.

[0036] The minimally invasive surgery of the device discards the relatively complex process of ESD, EFR and STER minimally invasive surgeries, and the operation is simple and fast, which greatly reduces the operation time and intraoperative complications; the device can lift and pull the mucosal lesions, especially submucosal tumors, by suction or clamping, and then cut and remove them from the root of the lesion. This method ensures not to directly contact the lesion body and ensures the integrity of the lesion, especially the submucosal tumor, as much as possible. This greatly improves the probability of RO resection; the device is operated simply without complex operation steps, and the technology is easy to popularize.

[0037] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the following drawings in which:

[0039] Figure 1 This is an axonometric diagram of the overall structure of an embodiment of the present invention;

[0040] Figure 2 yes Figure 1 A front view of the structure of an embodiment shown;

[0041] Figure 3 yes Figure 1 An exploded view of the structure of an embodiment shown;

[0042] Figure 4 yes Figure 1 An axonometric view of the structure of the ligature ring release assembly and the ligature ring assembly after being connected in one embodiment is shown;

[0043] Figure 5 yes Figure 1 A schematic structural diagram of an endoscope fixing member according to an embodiment is shown;

[0044] Figure 6 yes Figure 1 The structural axonometric view of a barrel body of an embodiment shown;

[0045] Figure 7 yes Figure 1 The structural front view of a barrel body of an embodiment shown;

[0046] Figure 8 yes Figure 7 Cross-section at AA;

[0047] Figure 9 This is a structural axonometric diagram of a ligature ring assembly according to an embodiment of the present invention;

[0048] Figure 10 yes Figure 9 A top view of a ligature assembly according to an embodiment is shown;

[0049] Figure 11 yes Figure 10 Cross-section at the middle BB;

[0050] Figure 12 yes Figure 9 An exploded view of a ligature ring assembly according to an embodiment is shown;

[0051] Figure 13 yes Figure 9 A schematic structural diagram of a ligature ring fixing member according to an embodiment is shown;

[0052] Figure 14 yes Figure 9 A schematic structural diagram of a ligation ring according to an embodiment is shown;

[0053] Figure 15 This is a schematic structural diagram of a ligation ring according to another embodiment of the present invention;

[0054] Figure 16 This is a structural axonometric diagram of a ligature ring assembly according to another embodiment of the present invention;

[0055] Figure 17 yes Figure 1 A front view of the structure of a ligature ring release assembly according to an embodiment is shown;

[0056] Figure 18 yes Figure 17 A partial enlarged view of point C in the middle;

[0057] Figure 19 This is an axonometric view of the overall structure of another embodiment of the present invention;

[0058] Figure 20 yes Figure 19 The overall structure of an embodiment shown is a front view;

[0059] Figure 21 yes Figure 19 An exploded view of the overall structure of an embodiment is shown;

[0060] Figure 22 yes Figure 19 An axonometric view of the structure of the ligature ring release assembly and the ligature ring assembly after being connected in one embodiment is shown;

[0061] Figure 23 yes Figure 19 An axonometric view of the endoscope fixing structure of one embodiment is shown;

[0062] Figure 24 yes Figure 19 An axonometric view of the barrel structure of an embodiment is shown. DETAILED DESCRIPTION

[0063] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0064] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0065] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0066] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0067] An embodiment of the present invention provides a ligature device, comprising a ligature ring assembly 1 and a ligature ring release assembly 2. The ligature ring assembly 1 and the ligature ring release assembly 2 cooperate with each other to ultimately ligature a ligature ring 11 around a target object. The specific structures of the ligature ring assembly 1 and the ligature ring release assembly 2 will be described in detail below.

[0068] See also Figures 9-12 The ligating ring assembly 1 includes a ligating ring 11 and a ligating ring fixture 12. The ligating ring fixture 12 is cylindrical, with a through hole defined therethrough and an outer surface defined on which the ligating ring 11 is mounted. The ligating ring fixture 12 can be formed of plastic or metal. The ligating ring 11 is elastic, and all or part of it is formed of an elastic material, which provides the elastic force required for automatic contraction and ligation. The stretched ligating ring 11 is secured to the outer surface of the ligating ring fixture 12, extending the ligating ring 11. When the ligating ring 11 is released from the ligating ring fixture 12, it contracts under its own elastic force, thereby ligating the target object. The automatic contraction of the annular, elastic ligating ring 11 for ligating the target object eliminates the need for fasteners, making the operation faster and preventing problems such as loosening of the ligating ring 11.

[0069] With respect to the above-mentioned ligature ring assembly 1 , embodiments of the present invention provide various types of ligature ring releasing assemblies 2 for cooperating therewith.

[0070] In some embodiments, the ligature release assembly 2 uses the negative pressure suction principle to suck the target object, thereby achieving ligation. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The ligation ring releasing assembly 2 comprises a barrel 21, a negative pressure suction channel 22 and a control component 23. One end of the barrel 21 is provided with a barrel opening, and an inner suction cavity is formed in the barrel 21. The negative pressure suction channel 22 is in communication with the barrel 21 to provide a force for sucking the target object to be ligated into the barrel opening of the barrel 21. The ligation ring fixing member 12 is sleeved on the inner side of the barrel opening of the barrel 21, and the cross-sectional shape of the ligation ring fixing member 12 matches the cross-sectional shape of the barrel 21, such as a circular shape, an elliptical shape, a polygonal shape, etc. The ligation ring 11 on the outer peripheral surface of the ligation ring fixing member 12 is located outside the barrel opening edge of the barrel 21, and can also be located between the barrel 21 and the ligation ring fixing member 12. The control component 23 is connected with the ligation ring fixing member 12 or the barrel 21. The control component 23 can drive the relative movement of the ligation ring fixing member 12 and the barrel 21 to retract the ligation ring fixing member 12 inwardly of the barrel 21, and then the ligation ring 11 is separated from the ligation ring fixing member 12 by the friction or pushing force of the barrel 21 on the ligation ring 11. In this way, the ligation ring 11 is pushed out in translation, without changing the initial setting state of the ligation ring 11, thereby ensuring the stability of ligation and the reliability of ligation effect.

[0071] In use, the ligation ring assembly 1 is first installed on the ligation ring releasing assembly 2, then the barrel opening of the barrel 21 of the ligation device is close to and aligned with the target object to be ligated, then a negative pressure is formed in the inner suction cavity of the barrel 21 by the negative pressure suction channel 22, and the target object is sucked into the barrel 21 under the suction of the negative pressure. After the target object is completely sucked into the barrel 21, the control component 23 of the ligation device drives the relative movement of the ligation ring fixing member 12 and the barrel 21 to retract the ligation ring fixing member 12 inwardly of the barrel 21, and finally the ligation ring 11 is separated from the ligation ring fixing member 12. The pushed-out ligation ring 11 is retracted to surround the root of the target object introduced into the barrel 21 without the support of the ligation ring fixing member 12. This embodiment uses the principle of negative pressure to realize the accurate grabbing of the target object. The suction state of the target object can be controlled by setting the size and depth of the barrel 21 and the degree of negative pressure. Moreover, the ligation of the target object is realized by the automatic contraction of the annular and elastic ligation ring, without the need for buckling, which is more convenient and avoids the problems such as relaxation of the ligation ring. The inner and outer diameters of the barrel 21 and the ligation ring fixing member 12 can be manufactured according to the size range of the ligation lesions, which is convenient for suction and ligation resection of different sizes.

[0072] In some embodiments, the ligation ring releasing assembly 2 uses the principle of clamping traction to pull the target object into the barrel 21, thereby realizing ligation. Referring to Figure 19 、 Figure 20 、 Figure 21 、 Figure 22The ligature release assembly 2 includes a barrel 21, a clamping member 24, and a control member 23. The distal end of the clamping member 24 is provided with a chuck, and the proximal end of the clamping member 24 is provided with a control handle. The control handle can drive the distal chuck to open and close, thereby applying a mechanical clamping force to the target object. The barrel 21 has a barrel opening at one end, and a clamping cavity is formed within the barrel 21. The clamping member 24 extends into the barrel 21 and outward from the barrel 21 to clamp the target object, providing a force to pull the target object 11 to be ligated into the barrel opening of the barrel 21. The ligature retainer 12 is sleeved inside the barrel opening of the barrel 21. The cross-sectional shape of the ligature retainer 12 matches the cross-sectional shape of the barrel 21, such as circular, elliptical, or polygonal. The ligature 11 on the outer circumference of the ligature retainer 12 is located outside the edge of the barrel opening of the barrel 21, or alternatively, between the barrel 21 and the ligature retainer 12. The operating component 23 is connected to the ligation ring fixing piece 12 or the barrel body 21. The operating component 23 can drive the ligation ring fixing piece 12 and the barrel body 21 to move relative to each other so that the ligation ring fixing piece 12 retracts toward the inside of the barrel body 21, and then the ligation ring is detached from the ligation ring fixing piece 12 through the friction force or thrust exerted by the barrel body 21 on the ligation ring.

[0073] During use, this embodiment first installs the ligating ring assembly 1 onto the ligating ring release assembly 2. The opening of the barrel 21 of the ligating device is then brought close to and aligned with the object to be ligated. The clamping member 24 is then opened. After the clamping member 24 firmly grips the object, the object is pulled into the clamping cavity of the barrel 21. Once the object is fully drawn into the barrel 21, the operating member 23 of the ligating device moves the ligating ring fixture 12 and the barrel 21 relative to each other, retracting the ligating ring fixture 12 toward the inside of the barrel 21. This ultimately detaches the ligating ring 11 from the ligating ring fixture 12. Without the support of the ligating ring fixture 12, the ligating ring 11 retracts and, without the support of the ligating ring fixture 12, encases the object drawn into the barrel 21. This embodiment utilizes the clamping member 24 to precisely grasp the object through direct clamping. The degree of object retraction can be controlled by adjusting the size and depth of the barrel 21 and the degree of traction applied by the clamping member 24. Furthermore, the ring-shaped, elastic ligation ring 11 automatically contracts to achieve ligation of the target object, eliminating the need for fastening, making the operation faster and avoiding problems such as loosening of the ligation ring 11. The inner and outer diameters of the barrel 21 and the ligation ring fixture 12 can be manufactured to suit the size range of the ligated lesions, facilitating clamping and ligation excision of lesions of varying sizes.

[0074] See also Figure 9 、 Figure 10 、 Figure 11 、 Figure 17 、 Figure 18The proximal end of the ligating ring fixing member 12 is sleeved on the inner side of the barrel opening of the barrel body 21, and the ligating ring is sleeved on the distal end of the ligating ring fixing member 12. The ligating ring 11 is located outside the barrel opening of the barrel body 21, that is, the ligating ring fixing member 12 is partially sleeved inside the barrel body 21 and partially extends outside the barrel body 21. The ligating ring 11 has a certain thickness, and the outer diameter of the ligating ring 11 is larger than the inner diameter of the barrel opening of the barrel body 21 to ensure that the barrel body 21 can push the ligating ring 11 away. When the ligating ring assembly 1 is installed on the ligating ring releasing assembly 2, the ligating ring fixing member 12 is embedded in the barrel body 21 until the edge of the ligating ring 11 just touches the edge of the barrel opening of the barrel body 21. During release, the operating member 23 is connected to the ligature ring fixing member 12 or the barrel body 21, and the operating member 23 of the ligature device causes the ligature ring fixing member 12 and the barrel body 21 to move relative to each other, so that the ligature ring fixing member 12 retracts toward the inside of the barrel body 21. During the retraction process, the barrel body 21 pushes the ligature ring 11 out of the ligature ring fixing member 12. The pushed-out ligature ring 11 retracts without the support of the ligature ring fixing member 12 and encases the target object pulled into the barrel body 21. It is understandable that the ligature ring fixing member 12 can also be completely enclosed in the barrel body 21. When the ligature ring fixing member 12 and the barrel body 21 move relative to each other, the ligature ring 11 is released by the friction force of the barrel body 21 on the ligature ring 11.

[0075] See also Figure 9 、 Figure 14 In some embodiments, the ligation ring 11 is annular and has a flat outer peripheral surface. The ligation ring 11 has a simple structure and lower cost.

[0076] In some embodiments, the ligature ring is provided with a plurality of support members, the hardness of which is greater than the elastic material of the ligature ring. The support members help the elastic part of the ligature ring to be shaped, so that the ligature ring is more convenient to be pushed out of the barrel. The support members are embedded in the ligature ring or protruded from the outer surface of the ligature ring. One or more support members 13 are provided, for example, Figure 15 In the illustrated embodiment, a plurality of support members 13 protrude radially outward and are embedded in the outer surface of the ligature ring 11. The plurality of support members 13 are evenly distributed along the circumference of the ligature ring 11. The protruding support members 13 can be in the shape of a rectangular, circular, or other boss, and are relatively hard, which helps the ligature ring 11 to be pushed out from the ligature ring fixing member 12.

[0077] See also Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 、 Figure 14 、 Figure 15In some embodiments, the inner surface of the ligation ring 11 is provided with protrusions 14. These protrusions 14 can be arranged in one or multiple segments, with the multiple segments evenly or unevenly distributed along the circumference of the ligation ring. The protrusions 14 form micro-thorns on the inner wall of the ligation ring 11. When the ligation ring 11 is ligated on the target object, the protrusions 14 penetrate the mucosal tissue, thereby increasing the reliability of the ligation. Accordingly, the ligation ring fixture 12 is provided with an escape notch 15 at the corresponding position of the protrusion 14. When the ligation ring 11 is attached to the ligation ring fixture 12, the protrusion 14 is located at the escape notch 15, preventing the protrusion 14 from being damaged by the ligation ring fixture 12 and increasing the space for the protrusion arrangement.

[0078] The ligature ring 11 and the ligature ring fixing member 12 are combined to form a ligature ring assembly 1, which is used as a disposable. Figure 9 、 Figure 16 One or more ligating rings 11 are provided on the ligating ring fixing member 12. When multiple ligating rings 11 are provided on the ligating ring fixing member 12, the multiple ligating rings 11 are sequentially attached to the outer circumference of the ligating ring fixing member 12 along the relative movement direction between the ligating ring fixing member 12 and the barrel body 21. That is, multiple ligating rings 11 can be released sequentially, thereby increasing the reliability of ligating, avoiding repeated ligating operations, and improving work efficiency.

[0079] The control component 23 is connected to the barrel body 21 or the ligature ring fixing member 12, and is used to drive the barrel body 21 or the ligature ring fixing member 12 to move, and finally realize the action of retracting the ligature ring fixing member 12 into the barrel body 21. In some embodiments, see Figure 6 、 Figure 17 、 Figure 18 The control component 23 includes a traction member 231, such as a metal or non-metallic wire such as a steel wire. One or more traction members 231 are provided. For example, in some embodiments, two traction members 231 are provided. The two traction members 231 are symmetrically distributed so that the ligation ring fixing member 12 is subjected to a balanced force and moves more smoothly. The barrel body 21 is provided with a traction member through hole 211. The traction member 231 passes through the traction member through hole 211 and extends into the barrel body 21 and is connected to the ligation ring fixing member 12. When releasing the ligation ring 11, the traction member 231 is pulled, and the traction member 231 drives the ligation ring fixing member 12 to retract into the barrel body 21. During this process, the barrel body 21 peels off the ligation ring 11 outside the ligation ring fixing member 12, and finally releases the ligation ring 11.

[0080] Since the ligature ring assembly 1 is disposable, it needs to be adapted and installed with the ligature ring release assembly 2 before use. In order to facilitate the quick connection of the traction member 231 and the ligature ring assembly 1, see Figure 13 、 Figure 17 、 Figure 18The distal end of the traction member 231 is provided with a hook 232, and the ligation loop fixing member 12 is provided with a hanging hole 121 connected with the hook 232. When the ligation loop fixing member 12 is fitted, the traction member 231 is pushed, so that the hook 232 at the distal end of the traction member 231 extends out of the traction member through hole 211 of the barrel body 21. The hook 232 is hung on the hanging hole 121 of the ligation loop fixing member 12, and then the traction member 231 is pulled back, so that the ligation loop fixing member 12 is pulled into the barrel body 21.

[0081] Further, referring to Figure 7 、 Figure 8 , the inner wall of the barrel body 21 is provided with a groove 212 for guiding the traction member 231, and the groove 212 is communicated with the traction member through hole 211, which is used for guiding and limiting the traction member 231, and improving the stability and smoothness of the traction of the traction member 231.

[0082] In some embodiments, the ligation device further comprises an endoscope 3, an endoscope fixing member 25 and a control component sleeve 26, referring to Figure 4 、 Figure 22 , the number of control component sleeves 26 corresponds to the number of traction members, and the control component sleeves 26 are connected between the endoscope fixing member 25 and the barrel body 21 to form an integral whole, which is convenient for use with the endoscope 3. By providing the endoscope 3, the ligation loop assembly 1 and the ligation loop release assembly 2 can be sent into the human body together with the endoscope 3, thereby improving the accessibility of the whole device. It can be understood that the endoscope 3 is not necessary, that is, when the target object to be ligated can be directly accessible, the ligation can be directly realized.

[0083] Referring to Figure 3 、 Figure 19 、 Figure 21 , the endoscope 3 is the existing equipment in the prior art, and the endoscope 3 has a wedge-shaped handle part and an endoscope working channel 31.

[0084] The endoscope 3 is fixedly connected with the handle of the endoscope 3, referring to Figure 5 、 Figure 23 In some embodiments, the endoscope fixing member 25 is provided with a clamping groove 251 and a tie 252 capable of limiting the handle of the endoscope 3 in the clamping groove 251. The clamping groove 251 and the handle part of the endoscope 3 are designed by profiling, which is convenient for the adaptive connection of the endoscope 3 on the endoscope fixing member 25.

[0085] Referring to Figure 6 、 Figure 24 , the barrel body 21 is provided with an endoscope sleeve 213, and the distal end of the endoscope 3 is tightly sleeved with the endoscope sleeve 213 to provide the visual information of the target object and to provide the working channel for the clamping member 24 to pass through the endoscope 3.

[0086] Referring to Figure 1 、 Figure 2 , Figure 3 、 Figure 19 、 Figure 20 、 Figure 21 The ligation device is installed on the endoscope 3 through the endoscope fixing piece 25 stuck in the endoscope handle and the endoscope sleeve 213 sleeved on the distal end of the endoscope to form a whole, and then, together with the endoscope 3, it is sent into the human body.

[0087] See also Figure 17 The control component 23 is placed in the control component sleeve 26, and the proximal end of the control component 23 is connected to the handle 232 outside the endoscope fixing part 25. The handle 232 can realize the pulling action of multiple control components 23 together to facilitate the control. The handle 232 can be designed in various shapes, such as Figure 3 In the illustrated embodiment, the handle 232 has an arc-shaped recess to avoid the endoscope 3 on one side.

[0088] See also Figure 5 、 Figure 23 The endoscope fixing member 25 is provided with a control member channel 254, which is connected to the control member sleeve 26. The control member 23 is inserted into the control member channel 254 and the control member sleeve 26. One end of the control member 23 is connected to the handle 232, and the other end is connected to the ligature ring fixing member 12. Figure 1 、 Figure 19 A limiting component 233 of the operating component 23 is provided in the operating component channel 254. The limiting component 233 can be a rubber plug, a friction block, etc., which is sleeved on the operating component 23 such as the traction member 231 to provide friction limitation for the operating component 23, ensuring that the operating component 23 will not move at will.

[0089] See also Figure 5 、 Figure 6 In combination with the embodiment of the negative pressure suction channel 22, the endoscope fixing member 25 is provided with a first negative pressure channel interface 253, and the barrel 21 is provided with a second negative pressure channel interface 214. Figure 4 The negative pressure suction channel 22 includes a pipe connecting the first negative pressure channel interface 253 and the second negative pressure channel interface 214. One or more pipes are provided and are sent into the human body together with the endoscope 3. They are then connected to the negative pressure device through the port at the proximal end of the pipe to form a negative pressure environment in the suction cavity of the barrel body 21. Of course, in addition to separately providing a pipe connecting the first negative pressure channel interface 253 and the second negative pressure channel interface 214, the negative pressure suction channel 22 can also utilize the endoscope working channel 31 of the endoscope, or the endoscope working channel 31 is combined with an externally provided pipe, and the negative pressure suction channel 22 is externally connected to the negative pressure suction device. This makes up for the problem of low negative pressure suction force through the endoscope working channel, and realizes the suction ligation of lesions with large suction resistance, such as those with large size or deep origin.

[0090] See also Figure 19 、 Figure 20 In the embodiment using the clamping member 24, the clamping member 24 extends into the barrel 21 through the endoscope working channel 31 of the endoscope 3. The clamping member 24 is delivered into the human body along with the endoscope 3, and then the handle 232 of the clamping member 24 at the proximal end of the endoscope 3 is operated to clamp the target object and pull it into the barrel 21.

[0091] The following further describes the method of using the present ligation device with respect to an embodiment using the negative pressure suction channel 22 and an embodiment using the clamping member 24:

[0092] 1. Embodiment using negative pressure suction channel 22

[0093] 1. Assembly, that is, when the device is needed, the components are assembled outside the human body first;

[0094] The ligature ring assembly 1 is installed on the ligature ring release assembly 2: the ligature ring 11 is inserted into the distal end of the ligature ring fixture 12, with the protrusion 14 on the inner side of the ligature ring 11 aligned with the clearance notch 15 of the ligature ring fixture 12. The traction member 231 is pushed using the handle 232 at the proximal end of the operating member 23, causing the hook 232 at the distal end of the traction member 231 to extend from the groove 212 on the inner wall of the barrel 21. The hook 232 engages the hanging hole 121 on the ligature ring fixture 12. Then, the handle 232 is used to pull the traction member 231 back, pulling the ligature ring fixture 12 into the suction barrel until the edge of the ligature ring 11 just touches the lower edge of the barrel 21. This indicates that the ligature ring assembly 1 is properly installed.

[0095] The ligation device is installed on the endoscope 3 through the endoscope fixing piece stuck in the handle 232 of the endoscope 3 and the endoscope sleeve 213 sleeved on the distal end of the endoscope 3, and then is sent into the human body together with the endoscope.

[0096] 2. Ligation Process

[0097] Outside the body, an external negative pressure suction device is connected to the negative pressure suction channel 22 of the ligation device. The barrel 21 of the ligation device is brought close to and aligned with the target object to be ligated. Then, the negative pressure suction channel 22 creates a negative pressure within the suction cavity of the barrel 21, drawing the target object into the barrel 21 under the suction of the negative pressure. After the target object is completely drawn into the barrel 21, the control component 23 of the ligation device causes the ligation ring fixture 12 and the barrel 21 to move relative to each other, causing the ligation ring fixture 12 to retract toward the inside of the barrel 21, ultimately detaching the ligation ring 11 from the ligation ring fixture 12. Without the support of the ligation ring fixture 12, the ligation ring 11 retracts and encases the target object introduced into the barrel 21. For a ligation ring assembly 1 equipped with multiple ligation rings 11, the traction member 231 can be further pulled using the handle 232 of the ligation device, causing the ligation ring fixture 12 to continue moving upward, releasing multiple ligation rings in sequence.

[0098] 3. After ligation, remove the device

[0099] After completing the above operations, the ligation ring 11 is successfully released and the target object is ligated. Then, the ligation device 11 is released and the component device is withdrawn from the human body together with the endoscope.

[0100] 4. Repeated ligation

[0101] After all the ligating rings 11 on a ligating ring fixing member 12 are used up, if ligating is still needed, the above steps 1-3 can be repeated to achieve further ligating of the same target object or another target object. And so on.

[0102] 2. Embodiment using the clamping member 24

[0103] 1. Assembly, that is, when the device is needed, the components are assembled outside the human body first;

[0104] The ligature ring assembly 1 is installed on the ligature ring release assembly 2: the ligature ring 11 is inserted into the distal end of the ligature ring fixture 12, with the protrusion 14 on the inner side of the ligature ring 11 aligned with the clearance notch 15 of the ligature ring fixture 12. The traction member 231 is pushed using the handle 232 at the proximal end of the operating member 23, causing the hook 232 at the distal end of the traction member 231 to extend from the groove 212 on the inner wall of the barrel 21. The hook 232 is hooked into the hanging hole 121 on the ligature ring fixture 12. Then, the handle 232 is used to pull the traction member 231 back, pulling the ligature ring fixture 12 into the suction barrel until the edge of the ligature ring just touches the lower edge of the barrel 21. This indicates that the ligature ring assembly 1 is properly installed.

[0105] The ligation device is installed on the endoscope 3 through the endoscope fixing piece stuck in the handle 232 of the endoscope 3 and the endoscope sleeve 213 sleeved on the distal end of the endoscope 3, and then is sent into the human body together with the endoscope.

[0106] 2. Ligation Process

[0107] The opening of the barrel body 21 of the ligature device is brought close to and aligned with the target object to be ligated. The clamping member 24 is then opened, and after the clamping member 24 firmly grips the target object, the target object is pulled into the clamping cavity of the barrel body 21. After the target object is completely pulled into the barrel body 21, the control member 23 of the ligature device causes the ligature ring fixture 12 and the barrel body 21 to move relative to each other, causing the ligature ring fixture 12 to retract toward the inside of the barrel body 21, ultimately detaching the ligature ring from the ligature ring fixture 12. The pushed-out ligature ring, without the support of the ligature ring fixture 12, retracts and entraps the target object pulled into the barrel body 21. For a ligature ring assembly 1 equipped with multiple ligature rings, the traction member 231 can be further pulled using the handle 232 of the ligature device, causing the ligature ring fixture 12 to continue moving upward, releasing multiple ligature rings 11 in sequence.

[0108] 3. After ligation, remove the device

[0109] After completing the above operations, the ligation ring 11 is successfully released and the target object is ligated. Then, the ligation device release assembly device is withdrawn from the human body together with the endoscope.

[0110] 4. Repeated ligation

[0111] After all the ligature rings on one ligature ring fixing member 12 are used up, if ligature is still needed, the above steps 1-3 can be repeated to achieve further ligature of the same target object or another target object. And so on.

[0112] The embodiments of the present invention abandon the knotting and ligation operation method used in the prior art, and utilize the elasticity of the ligation loop to automatically tighten to achieve ligation, which is more convenient to operate and avoids the potential risk caused by the breakage of the ligation line.

[0113] Throughout this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0114] Of course, the invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A ligation device, characterized in that: include The ligature ring assembly comprises a ligature ring and a ligature ring fixing piece, wherein the ligature ring fixing piece is cylindrical and elastic, and the ligature ring in a stretched state is sheathed on the outer circumference of the ligature ring fixing piece; The ligature ring release assembly includes a barrel body, a negative pressure suction channel, and a manipulation component. The negative pressure suction channel is in communication with the barrel body to provide a force to suck the target object to be ligated from the barrel mouth of the barrel body. The ligature ring fixing piece is sleeved on the inner side of the barrel mouth of the barrel body. The manipulation component can drive the ligature ring fixing piece and the barrel body to move relative to each other so that the ligature ring fixing piece retracts toward the inner side of the barrel body, thereby detaching the ligature ring from the ligature ring fixing piece. The proximal end of the ligature ring fixing piece is sleeved on the inner side of the barrel opening of the barrel body, the ligature ring is sleeved on the distal end of the ligature ring fixing piece, the ligature ring is located outside the barrel opening of the barrel body, and the outer diameter of the ligature ring is greater than the inner diameter of the barrel opening of the barrel body; The ligation ring is provided with at least three supporting members; The support member protrudes from the outer surface of the ligature ring, and a plurality of the support members are evenly distributed along the circumference of the ligature ring, and the protruding support member is in the shape of a boss; The support member has a harder property than the ligature ring, which helps the ligature ring to be pushed out from the ligature ring fixing member.

2. The ligation device according to claim 1, characterized in that: Also includes An endoscope, wherein the barrel body is provided with an endoscope sleeve, and the distal end of the endoscope is sleeved with the endoscope sleeve; an endoscope fixing member, detachably connected to the proximal end of the endoscope, and provided with a first negative pressure channel interface; a manipulation component sleeve connected between the endoscope fixing member and the barrel, wherein the manipulation component is inserted into the manipulation component sleeve, and a proximal end of the manipulation component is connected to a handle outside the endoscope fixing member; Wherein, a second negative pressure channel interface is provided on the barrel body, and the negative pressure suction channel includes a pipe connecting the first negative pressure channel interface and the second negative pressure channel interface.

3. A ligation device, characterized in that: include The ligature ring assembly comprises a ligature ring and a ligature ring fixing piece, wherein the ligature ring fixing piece is cylindrical and elastic, and the ligature ring in a stretched state is sheathed on the outer circumference of the ligature ring fixing piece; The ligature ring release assembly includes a barrel body, a clamping component, and a manipulation component. The clamping component extends into the barrel body to provide a force to pull the target object to be ligated into the barrel mouth of the barrel body. The ligature ring fixing piece is sleeved on the inner side of the barrel mouth of the barrel body. The manipulation component can drive the ligature ring fixing piece and the barrel body to move relative to each other so that the ligature ring fixing piece retracts toward the inner side of the barrel body, thereby detaching the ligature ring from the ligature ring fixing piece. The proximal end of the ligature ring fixing piece is sleeved on the inner side of the barrel opening of the barrel body, the ligature ring is sleeved on the distal end of the ligature ring fixing piece, the ligature ring is located outside the barrel opening of the barrel body, and the outer diameter of the ligature ring is greater than the inner diameter of the barrel opening of the barrel body; The ligation ring is provided with at least three supporting members; The support member protrudes from the outer surface of the ligature ring, and a plurality of the support members are evenly distributed along the circumference of the ligature ring, and the protruding support member is in the shape of a boss; The support member has a harder property than the ligature ring, which helps the ligature ring to be pushed out from the ligature ring fixing member.

4. The ligation device according to claim 3, characterized in that: Also includes An endoscope, wherein the barrel body is provided with an endoscope sleeve, and the distal end of the endoscope is sleeved with the endoscope sleeve; an endoscope fixing member, detachably connected to the proximal end of the endoscope; a manipulation component sleeve connected between the endoscope fixing member and the barrel, wherein the manipulation component is inserted into the manipulation component sleeve, and a proximal end of the manipulation component is connected to a handle outside the endoscope fixing member; Wherein, the clamping component extends into the barrel body through the endoscope working channel of the endoscope.

5. The ligation device according to claim 1 or 3, characterized in that: The inner surface of the ligating ring is provided with thorns, and the ligating ring fixing piece is provided with avoidance notches at positions corresponding to the thorns.

6. The ligation device according to claim 1 or 3, characterized in that: A plurality of ligating rings are provided, and the plurality of ligating rings are sequentially sleeved on the outer peripheral surface of the ligating ring fixing piece along the relative movement direction of the ligating ring fixing piece and the barrel body.

7. The ligation device according to claim 1 or 3, characterized in that: The manipulation component includes a traction member. The barrel body is provided with a traction member through hole. The traction member passes through the traction member through hole and extends into the interior of the barrel body and is connected with the ligating ring fixing member.

8. The ligation device according to claim 7, characterized in that: A hook is provided at the distal end of the traction member, and a hanging hole connected to the hook is provided on the ligating ring fixing member.

9. The ligation device according to claim 7, characterized in that: The inner wall of the barrel body is provided with a groove for guiding the traction member.

10. The ligation device according to claim 1 or 3, characterized in that: Also includes An endoscope, wherein the barrel body is provided with an endoscope sleeve, and the distal end of the endoscope is sleeved with the endoscope sleeve; an endoscope fixing member, detachably connected to the proximal end of the endoscope; The manipulation component sleeve is connected between the endoscope fixing component and the barrel body, the manipulation component is inserted into the manipulation component sleeve, and the proximal end of the manipulation component is connected to a handle outside the endoscope fixing component.

11. The ligation device according to claim 10, characterized in that: The endoscope fixing piece is provided with a control component channel, the control component channel is connected to the control component sleeve, and a control component limiting component is provided in the control component channel.

12. The ligation device according to claim 10, characterized in that: The endoscope fixing piece is provided with a card slot and a lacing strap capable of confining the handle of the endoscope in the card slot.

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