Endoscopic ligation device

Abstract

The present invention discloses an endoscopic ligation device. The endoscopic ligation device includes a ligation device body, a ligation device mounting assembly, and a ligation device release assembly. The ligation device body is a rope with a locking structure; the ligation device mounting assembly includes a cylinder and a ligation device fixing member, and the ligation device fixing member is used to fix the ligation device body to the surface of the cylinder; the ligation device release assembly includes a traction member, and the cylinder has a first end and a second end in the axial direction, and the first end is farther away from the control end of the traction member than the second end, and the traction member is used to connect with the ligation device body, and the traction member can drive the ligation device body to shrink toward the center and detach from the surface of the cylinder. The endoscopic ligation device in the present invention adopts a rope with a locking structure, so that it can lock the target object.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an endoscopic ligation device. Background Art

[0002] With the development of endoscopic technology, minimally invasive endoscopic surgery has achieved excellent therapeutic results for diseases such as early gastrointestinal tumors (such as early cancer and submucosal tumors), gastrointestinal bleeding, varicose veins, gastrointestinal fistulas, and diverticula, thereby avoiding the need for more invasive surgical procedures and effectively resolving patients' problems, even saving their lives. There are many minimally invasive methods for treating these diseases under flexible endoscopy, among which band ligation surgery has unique advantages: it is simple and quick to operate, and it significantly reduces operative time and intraoperative complications.

[0003] However, there are currently few instruments available for endoscopic banding. Traditional banding devices use elastic leather bands, which tighten around the target object through the band's own tightening force. This method of banding is not very reliable and can easily slip. Summary of the Invention

[0004] The main purpose of the present invention is to provide an endoscopic ligation device, which makes the ligation less likely to slip and improves the ligation effect.

[0005] According to an embodiment of the present invention, the endoscopic ligation device comprises:

[0006] The ligature body is a rope with a locking structure;

[0007] A ligature installation assembly, comprising a barrel and a ligature fixing member, wherein the ligature fixing member is used to fix the ligature body to the surface of the barrel;

[0008] The ligature release assembly includes a traction member, the cylinder has a first end and a second end in the axial direction, the first end is farther away from the control end of the traction member than the second end, the traction member is used to connect with the ligature body, and the traction member can drive the ligature body to shrink toward the center and separate from the surface of the cylinder.

[0009] In some embodiments, the outer diameter of the cylinder shrinks in a direction toward the end of the first end in at least a partial area, the ligature fixing member is used to fix the ligature body to the outer wall surface of the first end of the cylinder, and the traction member is used to drive the ligature body and the cylinder to move relative to each other so that the ligature body shrinks toward the center.

[0010] In some embodiments, the endoscopic ligation device further comprises a pushing member, which abuts against the ligation device body, and the direction of the force applied by the pushing member to the ligation device body is opposite to the direction of the force applied by the traction member to the ligation device body.

[0011] In some embodiments, the ligation device fixing member is used to fix the ligation device body to the inner wall surface of the first end of the barrel.

[0012] In some embodiments, the ligature body is a cable tie with a stop function, and the cable tie includes a cable tie body and a locking portion. The cable tie body has a locking section, and the locking portion is used to allow the locking section to pass through the locking portion only along the direction of tightening the cable tie.

[0013] In some embodiments, the endoscopic ligation device is provided with a traction inlet, one end of the tie body passes through the traction inlet and is connected to the traction member, and the endoscopic ligation device is provided with a stop structure at the traction inlet, and the stop structure is used to prevent the locking part from passing through the traction inlet.

[0014] In some embodiments, the cable tie body is sequentially provided with a traction connection section, a movable section and a locking section, the movable section is farther away from the locking portion than the locking section, the locking section has a locking structure that cooperates with the locking portion, and the movable section does not have the locking structure.

[0015] In some embodiments, a groove structure is provided on the surface of the cable tie body.

[0016] In some embodiments, the cable tie body is sequentially provided with a traction connection section, a movable section, a breakable section and a locking section, the movable section is farther away from the locking portion than the locking section, the locking section has a locking structure that cooperates with the locking portion, and the movable section does not have the locking structure, and the tensile strength of the breakable section is lower than the tensile strength of the movable section and the tensile strength of the locking section.

[0017] In some embodiments, the ligature mounting assembly is integrally formed.

[0018] In some embodiments, the endoscopic ligation device further comprises an endoscope fixing portion, and the endoscope fixing portion is used to fix the endoscopic ligation device on an endoscope.

[0019] In some embodiments, the barrel is provided with an annular limiting portion on the inner wall surface, and the annular limiting portion is used to support the snare of the endoscope and limit the snare in the axial direction of the barrel.

[0020] In some embodiments, the pulling member is made of metal, so that the pulling member at the connection position between the pulling member and the ligation device body can be fused by electricity.

[0021] The technical solution in the embodiments of the present invention has at least the following technical effects: the ligature body uses a locking rope to prevent the ligature body from loosening due to retraction, thereby enabling the endoscopic ligature device 1 to securely entangle the target object. Compared to ligature operations using elastic leather bands, ligature reliability is improved.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1( a ) is a schematic diagram of an endoscopic ligation device and an endoscope assembly structure (left side view) in some embodiments of the present invention;

[0024] FIG1( b ) is a front view perspective of FIG1( a ).

[0025] Figure 2 1(a) and 1(b) are schematic diagrams of the decomposed structures.

[0026] FIG3( a ) is a schematic diagram of the assembly structure of the ligature device installation component and the ligature device body in some embodiments of the present invention;

[0027] FIG3( b ) is a bottom view of FIG3( a );

[0028] FIG3( c ) is a cross-sectional view taken along the line AA of FIG3( a );

[0029] FIG3( d ) is a schematic diagram of a partial enlargement of point I in FIG3( c ).

[0030] Figure 4 Schematic diagram of the exploded structure of the ligature device installation assembly and the ligature device body in some embodiments of the present invention;

[0031] FIG5( a ) is a schematic diagram of the assembly structure of the ligature device installation assembly in some embodiments of the present invention (bottom view);

[0032] FIG5( b ) is a partial enlarged schematic diagram of point K in FIG5( a );

[0033] Figure 6 Schematic diagram of the structure of cable ties in some embodiments of the present invention;

[0034] Figure 7 Schematic diagram of the structure of the annular limiting portion in some embodiments of the present invention;

[0035] FIG8( a ) is a schematic diagram of the assembly structure of the ligature device installation assembly and the ligature device body in other embodiments of the present invention (the ligature device body is located on the inner wall surface of the cylinder);

[0036] FIG8( b ) is a cross-sectional view taken along line BB of FIG8( a );

[0037] FIG8( c ) is a partial enlarged schematic diagram of point M in FIG8( b );

[0038] FIG8( d ) is a schematic diagram (stereoscopic view) of the assembly structure in FIG8( a ).

[0039] Figure 9 Schematic diagram of the structure of the annular limiting portion in other embodiments of the present invention (the ligation device body is located on the inner wall surface of the cylinder);

[0040] FIG10( a ) is a schematic diagram of an endoscopic ligation device and an endoscope assembly structure in other embodiments of the present invention (the endoscopic ligation device is further provided with a pushing member, from a left side view);

[0041] FIG10( b ) is a front view of FIG10( a ) (the endoscopic ligation device is provided with a pusher);

[0042] Figure 11 10(a) and 10(b) are schematic diagrams of the decomposed structure.

[0043] Figure 12 Schematic diagram of the exploded structure of the ligation device installation assembly and the ligation device body in other embodiments of the present invention (the endoscopic ligation device is additionally provided with a pushing member);

[0044] FIG13( a ) is a schematic diagram of the assembly structure of the ligation device installation assembly in other embodiments of the present invention (the endoscopic ligation device is additionally provided with a pushing member, from a bottom view);

[0045] FIG13( b ) is a partial enlarged schematic diagram of point N in FIG13( a );

[0046] FIG14( a ) is a schematic diagram of the structure of an integrally formed ligature device mounting assembly in some embodiments of the present invention (the ligature device body is located on the outer wall surface of the barrel, and the endoscopic ligature device does not have a separate pusher);

[0047] FIG14( b ) is a schematic diagram of the structure of an integrally formed ligature mounting assembly in some embodiments of the present invention (the ligature body is located on the inner wall surface of the barrel);

[0048] FIG14( c ) is a schematic diagram of the structure of the integrally formed ligature installation assembly in some embodiments of the present invention (the ligature body is located on the outer wall surface of the cylinder, and the endoscopic ligature device is provided with a pusher).

[0049] In the figure, 1-endoscopic ligation device; 10-cable tie, 1011-traction connecting section, 1012-movable section, 1014-locking section, 102-locking part; 11-ligation device installation assembly, 111-cylinder, 1111-traction entrance, 1112-stop structure, 1113-annular limiting part, 112-ligation device fixing part, 113-traction channel component; 12-ligation device release assembly, 121-traction part, 1211-outer tube, 1212-traction part control part, 1213-traction part body, 122-pushing part, 123-conductive interface; 13-endoscope fixing part; 2-endoscope, a-first end, b-second end, c-control end, d-installation position of the cable tie body on the inner wall of the cylinder. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention.

[0051] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can include fixed connections, movable connections, detachable connections, non-detachable connections, or integral connections; it can include mechanical connections, electrical connections, or mutual communication. "Fixed connection" includes detachable connections, non-detachable connections, and integral connections.

[0053] In the present invention, terms such as "first" or "second" are used for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0054] The technical solutions between the various embodiments of the present invention can be combined with each other. It should be noted that the embodiments described below are some embodiments rather than all embodiments. Generally, the components of the embodiments described and shown in the drawings herein can be arranged and designed in various different configurations.

[0055] It should be pointed out that the “endoscopic ligation device” in the present invention means that the ligation device can be used in conjunction with an endoscope, but does not mean that the ligation device must be fixedly connected to the endoscope.

[0056] Referring to Figures 1(a) and 1(b), an endoscopic ligation device 1 includes a ligation device body, a ligation device mounting assembly 11, and a ligation device release assembly 12. The ligation device body is a cord with a locking structure. It should be noted that due to the length of both the endoscopic ligation device 1 and the endoscope 2, some lengths are omitted in Figures 1(a) and 1(b).

[0057] Specifically, the ligature body is a cable tie 10 with a stop function. Figure 6 The cable tie 10 includes a cable tie body and a locking portion 102. The cable tie body has a locking section 1014. The locking portion 102 is configured to allow the locking section 1014 to pass through the locking portion 102 only in the direction in which the cable tie 10 is tightened. The locking section 1014 is provided with a locking structure such as serrations or evenly spaced protrusions. The locking structure of the locking section 1014 cooperates with the locking portion 102 to form a one-way moving component similar to a ratchet pawl. The locking structure of the locking section 1014 acts as a ratchet, while the locking portion 102 acts as a pawl. As a result, the cable tie 10 can only move in the direction in which the cable tie is tightened and cannot retract, ensuring reliable tying. Further specific structural forms or deformable structural forms of the cable tie 10 will be described below in conjunction with the accompanying drawings.

[0058] Please continue reading Figure 6 The cable tie body is sequentially provided with a traction connection section 1011, a movable section 1012, and a locking section 1014. The locking section 102 is configured to allow the locking section 1014 to pass through the locking section 102 only in the direction in which the cable tie 10 is tightened. The end of the locking section 1014 is fixed to the locking section 102. The movable section 1012 is further away from the locking section 102 than the locking section 1014. The locking section 1014 has a locking structure that cooperates with the locking section 102, while the movable section 1012 does not have a locking structure. The traction connection section 1011 is connected to a traction member 121 (the traction member 121 is shown in Figure 1) and other components to achieve traction control of the cable tie body. The traction connecting section 1011 and the movable section 1012 do not have a locking mechanism, allowing them to retract after passing through the locking portion 102. This prevents premature tightening of the cable tie 10 before the cable tie 10 and the object are properly positioned. Initially, when the traction connecting section 1011 and the movable section 1012 pass through the locking portion 102, the cable tie 10 does not need to be tightened. Once the locking section 1014 passes through the locking portion 102, the cable tie 10 begins tightening, which prevents it from retracting.

[0059] It can be understood that, based on the above embodiments, a groove structure can also be provided on the surface of the cable tie body. For example, a groove structure is formed on the surface of part or all of the lengths of the traction connection section 1011, the movable section 1012, and the locking section 1014, that is, grooves are provided on the inner surface or both the inner and outer surfaces of the cable tie 10 formed in a loop shape, so that the cross-section of the cable tie 10 presents a "U" shape (grooves are provided on the inner surface) or an "H" shape (grooves are provided on both the inner and outer surfaces), thereby guiding the cooperation between the locking part 102 and the cable tie body, and also facilitating the cable tie body to pass through the locking part.

[0060] The cable tie body can also be sequentially provided with a traction connection section 1011, a movable section 1012, a breakable section, and a locking section 1014. The locking part 102 is used to enable the locking section 1014 to pass through the locking part 102 only along the direction in which the cable tie 10 is tightened. The end of the locking section 1014 is fixed to the locking part 102. The movable section 1012 is farther from the locking part 102 than the locking section 1014. The locking section 1014 has a locking structure that cooperates with the locking part 102, while the movable section 1012 does not have a locking structure. The tensile strength of the breakable section is lower than the tensile strength of the movable section 1012 and the tensile strength of the locking section 1014. The breakable section is easy to break. It can be made of a material with low tensile strength at the breakable section, or can be made easy to break in terms of shape and structure (for example, the thickness of the breakable section is smaller than other sections of the cable tie body). The breakable section is arranged only before the locking section 1014. After the cable tie body is broken, only the locking section 1014 and the locking part 102 are left on the object to be sleeved, so that less of the cable tie body is left after sleeving. This means that less of the cable tie body remains in the human body after the sleeving operation. It can be understood that the breakable section can also be arranged at other positions of the cable tie body, such as near the traction connection section 1011. It can be understood that a groove structure can also be correspondingly provided on the surface of all or part of the length of the cable tie body provided with a breakable section.

[0061] It can be understood that other cord belts with a locking structure can also be selected according to needs. For example, a nylon cord with a locking structure is used as the sleeving loop. The nylon cord passes through two leather sleeves of different sizes and is separated into two loops of different sizes (similar to the shape of the number "8"). When in use, the small loop is connected to the traction member in the embodiments of the present invention, and the large loop is used as the sleeving loop. The two leather sleeves, as the locking structure, have a non-return function. By pulling the small loop through the traction member, the large loop used as the sleeving loop is tightened. It should be noted that the cord belt with a locking structure includes that the cord belt itself has a locking structure such as a locking part, and also includes that an ordinary cord belt cooperates with a separate locking member to complete the locking function.

[0062] Please continue to refer to Figures 1(a) and 1(b). The ligature device mounting assembly 11 includes a cylinder 111, a ligature device fixing member 112, and a traction channel member 113 (Figure 3(a) shows the traction channel member 113). The ligature device fixing member 112 is used to fix the cable tie 10 to the surface of the cylinder 111. The cylinder 111 has a first end a and a second end b in the axial direction. The traction channel member 113 is provided with a traction inlet 1111 (the traction inlet 1111 is shown in Figure 5(b)) and an outlet at the second end b. In some embodiments shown in Figures 1(a) and 1(b), the ligature device fixing member 112 fixes the cable tie 10 to the outer wall surface of the cylinder 111. The cylinder 111 is used for the target object to be ligated to be pulled close to the cylinder inlet of the cylinder 111 or to enter the interior of the cylinder 111. It can be understood that when ligating certain targets, it is not necessary to pull the target object to the interior of the cylinder 111. It should be pointed out that the "pulling" in the present invention includes lifting the target object to be ligated by suction and clamping. When the diseased tumor is lifted by suction, the cylinder 111 is connected to the suction channel of the negative pressure suction device to provide suction to suck the target object into the interior of the cylinder 111. When the target object is lifted by clamping, one end of the clamping device passes through the cylinder 111 and pulls the target object so that the target object approaches the cylinder inlet of the cylinder 111 or enters the interior of the cylinder 111. Some embodiments shown in Figures 1(a) and 1(b) illustrate an endoscopic ligation device 1 that works in conjunction with a negative pressure suction device or a clamping device.

[0063] See also Figure 2 , the ligation device fixing parts 112 are sheet metal parts that are spaced apart and distributed on the outer wall surface of the barrel 111. It is pointed out here that in the embodiment of the present invention, the end where the control handle of the entire endoscopic ligation device 1 is located (i.e., the control end c) is the proximal end, and the other end of the entire endoscopic ligation device 1 is the distal end. Correspondingly, the parts on the endoscopic ligation device 1 are also divided into the distal end and the proximal end according to the distance from the control handle of the endoscopic ligation device 1. For example, the first end a and the second end b of the barrel 111 are the distal end and the proximal end of the barrel 111, respectively.

[0064] The distal end of the ligature fixture 112 is provided with a bent portion. The distal end of this bent portion is located near the end surface of the first end a of the barrel 111, thereby securing the cable tie 10 between the outer wall surface of the barrel 111 and the ligature fixture 112. The ligature fixture 112 can also be made of a non-metallic material. It is understood that the outer wall surface of the barrel 111 also serves as a support. Through the synergistic action of the outer wall surface and the ligature fixture 112, the cable tie 10 is secured to the outer wall surface of the barrel 111.

[0065] Continuing with Figures 1(a) and 1(b), the ligature release assembly 12 includes a traction member 121. The control end c of the traction member 121 is relatively remote from the first end a of the barrel 111. The traction member 121 is used to drive the cable tie 10 to retract inwardly from the barrel 111, thereby removing it from the surface of the barrel 111. The cable tie 10 on the endoscopic ligature device 1 is looped. As the cable tie 10 retracts inwardly from the barrel 111, the area encompassed by the loop formed by the cable tie 10 decreases. This contraction causes the cable tie 10 to detach from the surface of the barrel 111, allowing it to encircle the target object, facilitating subsequent manipulation.

[0066] Compared with the previous ligation operation using elastic leather rings, the ligation device body in the embodiment of the present invention uses a rope with a locking structure for ligation, which prevents the ligation device body from loosening due to retreat, thereby enabling the endoscopic ligation device 1 to firmly lock the target object and improve the reliability of the ligation.

[0067] Please refer to Figure 1(a), Figure 1(b), Figure 2 , Figure 3(a), Figure 3(b), Figure 3(c), Figure 3(d) and Figure 4 In some embodiments, the traction member 121 is connected to the ligation device body. The traction member 121 includes an outer tube 1211, a traction member control unit 1212 and a traction member body 1213. The traction member body 1213 is located inside the outer tube 1211, and the outer tube 1211 is connected to the traction channel component 113 shown in Figure 3(a) (including the situation where the outer tube 1211 is passed through the interior of the traction channel component 113). The traction channel component 113 is connected near the distal end of the cylinder 111. The traction member control unit 1212 is used to control the movement of the traction member body 1213. The traction member body 1213 shown in Figures 1(a) and 1(b) is a traction wire, and the ligation device body is a cable tie 10. As shown in Figures 3(c) and Figure 4 As shown, the distal end of the traction member body 1213 has a bent portion or hook. The traction member body 1213 passes through the outer tube 1211 and hooks onto the cable tie 10, so that the movement of the traction member body 1213 can drive the cable tie 10. With the aid of the traction member body 1213, the manipulation end of the endoscopic ligation device in this embodiment of the present invention can control the operation of the ligation device body (e.g., the cable tie 10) even if the manipulation end is away from the first end a of the barrel 111 (i.e., away from the target object to be ligated).

[0068] In an embodiment of the present invention, the outer tube 1211 is parallel to the body of the endoscope 2, without interference. It will be appreciated that in some alternative embodiments, part or all of the outer tube 1211's length may interfere with the body of the endoscope 2, allowing the body to provide fixed support for the outer tube 1211, thereby enabling the traction member body 1213 passing through the outer tube 1211 to effectively pull the cable tie 10. The interference is not limited to using medical tape for binding and fixation or providing a multi-lumen outer tube for the traction member body 1213 and the body of the endoscope 2 to pass through. To allow the outer tube 1211 to adapt to the bending of the body of the endoscope 2 without deformation, the outer tube 1211 may be made of an elastic material or have an elastic ring embedded in its wall.

[0069] Please refer to Figures 3(a), 3(b), 3(c), 3(d) and Figure 4 In some embodiments, the outer diameter of the barrel 111 shrinks in at least a portion of the barrel toward the first end a. The ligature fixture 112 is used to secure the ligature body to the outer wall surface of the first end a of the barrel 111. The traction member 121 is used to drive the ligature body and the barrel 111 to move relative to each other, causing the ligature body to shrink toward the inner side 11 of the barrel. The barrel 111 shown in Figures 1(a) and 1(b) exhibits an inclined surface near the first end a, i.e., the outer diameter of the barrel 111 decreases as the area near the first end a decreases. It is understood that the outer diameter of the barrel 111 may also shrink in the direction toward the first end a throughout the entire barrel. The traction member 121 drives the cable tie 10 toward the first end a, thereby generating relative movement between the cable tie 10 and the barrel 111. The inclined surface structure guides the cable tie 10 to move further toward the first end a, where the outer diameter is smaller, during the process of shrinking toward the center. As the cable tie 10 moves axially toward the first end a, the outer diameter of the loop formed by the cable tie 10 decreases, causing the cable tie 10 to separate from the barrel 10 at the first end a. If the outer diameter of the barrel 111 is not configured to shrink toward the first end a, the cable tie 10 will be tightly bound to the outer wall of the barrel 111 as it shrinks toward the center, making it difficult to separate from the barrel 111, thereby preventing the cable tie 10 from being able to bind the target object.

[0070] Please refer to Figure 10(a), Figure 10(b), Figure 11 and Figure 12In some alternative embodiments, the endoscopic ligation device 1 further includes a pusher 122, which abuts the ligation device body. The direction of the force applied by the pusher 122 to the ligation device body is opposite to the direction of the force applied by the traction member 121. It is understood that to achieve tightening of a ligation device such as a cable tie, it is necessary to apply a pulling force to one end of the ligation device body while ensuring that the other end of the ligation device body is fixed or subjected to a pushing force in the opposite direction. This improves the pulling effect of the ligation device body and further improves the tightening effect of the ligation device body. Specifically, the traction member 121 applies a pulling force to the cable tie 10 backward, while the pusher 122 applies a pushing force to another position of the cable tie 10 forward, thereby firmly tightening the cable tie 10. As shown in Figures 10(a) and 10(b), the pusher 122 is tubular. It is understood that the pusher 122 may also take other forms. The pushing member 122 is also located inside the outer tube 1211 , and the outer tube 1211 is connected to the traction channel component 113 (including the case where the outer tube 1211 is disposed inside the traction channel component 113 ).

[0071] Please refer to Figures 8(a), 8(b), 8(c), 8(d) and Figure 9 In some alternative embodiments, the ligature fixing member 112 is used to fix the ligature body to the inner wall surface of the first end a of the cylinder 111. As shown in Figures 8(c) and 8(d), since the cable tie 10 is fixed to the inner wall surface of the first end a of the cylinder 111 (specifically, as shown in Figure 8(c) and Figure 8(d)), Figure 9 As shown, the cable tie 10 is fixed at position d, which is located below the annular limiting portion 1113), so that the cable tie 10 can detach from the barrel 111 by itself even if there is no relative movement in the axial direction of the barrel 111, that is, detach from the endoscopic ligation device and lock the target object.

[0072] Please refer to Figure 8(d) and Figure 9 It is understandable that the inner wall surface of the cylinder 111 also plays a supporting role. Under the synergistic effect of the inner wall surface and the ligature fixing member 112, the cable tie 10 is fixed to the inner wall surface at d of the cylinder 111.

[0073] Note that, as shown in FIG8( a ), the outer wall of the first end a of the barrel 111 does not contract inwardly to form an inclined surface, but rather presents a straight cylindrical wall surface. Without an inclined surface on the outer wall surface, a certain amount of structural space is saved, reducing the lateral dimensions of the endoscopic ligation device 1, making the device more compact and convenient. Furthermore, when the traction member 121 pulls the cable tie 10, the cable tie 10 is directly applied to the target object, without the need for the tie to slip off the outer wall surface of the barrel 111 before being applied to the target object, making the entire process more efficient.

[0074] Please continue to refer to Figure 5(a), Figure 5(b) and Figure 6 In some embodiments, the endoscopic ligation device 1 is provided with a traction inlet 1111, through which one end of the cable tie body passes, thereby connecting to the traction member 121. A stop structure 1112 is provided at the traction inlet 1111, which is used to prevent the locking portion 102 of the cable tie 10 from passing through the traction inlet 1111. As shown in Figures 5(a) and 5(b), the stepped stop structure 1112 allows the cable tie body to pass through the traction inlet 1111 while the locking portion 102 cannot. If the locking portion 102 can also pass through the traction inlet 1111, the locking portion 102 moves with the cable tie body during the pulling process, and the cable tie body cannot be tightened. Therefore, tightening the cable tie body requires that one end of the cable tie body be fixed. One end of the cable tie body is fixed to the locking portion 102. The locking portion 102 is restricted in the traction inlet 1111 and cannot move further, and one end of the cable tie body is also restricted in the traction inlet 1111 and cannot move further, thereby playing the role of fixing one end of the cable tie body. It is understandable that the stop structure includes a method of reducing the passing area of the traction inlet 1111 to prevent the locking portion 102 from passing through the traction inlet 1111. For example, refer to Figure 12 13 (a) and FIG. 13 (b), in an alternative embodiment in which a push member 122 is provided, the inner diameter of the push member 122 gradually shrinks in the direction of the bottom end port (see Figure 12 The reduced inner diameter reduces the passing area, which only allows the relatively smaller cable tie body to pass through, but does not allow the locking portion 102 to pass through (see Figures 13(a) and 13(b)).

[0075] Referring to Figures 14(a), 14(b), and 14(c), in some embodiments, the ligation device mounting assembly 11 is integrally formed. The integrally formed structure reduces the number of parts and assembly steps, and is also easier to process. As shown in Figures 14(a), 14(b), and 14(c), the barrel 111, the ligation device fixing member 112, and the traction channel member 113 are integrally formed. The end of the traction channel member 113 is provided with an external thread to facilitate its connection and assembly with other parts. It is understood that the end of the traction channel member 113 can also be formed into other connection structures that match other parts. Figure 14(c) shows that the stop structure of the endoscopic ligation device 1, which is equipped with a push member 122, utilizes the gradually decreasing diameter of the push member 122.

[0076] Please continue to refer to Figure 1(a), Figure 1(b) and Figure 2The endoscopic ligation device 1 also has an endoscope fixing portion 13, which is used to fix the endoscopic ligation device 1 on the endoscope. As shown in Figures 1(a) and 1(b), the second end b of the barrel 111 forms a truncated cone shape with a radius that shrinks toward the end. One end of the endoscope passes through the opening of the second end b and is fixed to the second end b of the barrel 111, that is, the endoscope fixing portion 13 is provided at the second end b of the barrel 111. The endoscopic ligation device 1 and the overall structure of the endoscope are both relatively long. In order to better fix the endoscopic ligation device 1 on the endoscope, the endoscope fixing portion 13 is also provided at other positions of the endoscopic ligation device 1. For example, the endoscopic ligation device 1 is also provided with an endoscope fixing portion 13 in the form of a C-shaped bayonet. The C-shaped bayonet also fixes the traction member 121 of the endoscopic ligation device 1 to the endoscope, so that the endoscopic ligation device 1 is more firmly fixed to the endoscope.

[0077] See also Figure 7 and Figure 9 The barrel 111 is provided with an annular limiting portion 1113 on the inner wall surface between the first end a and the second end b, relatively close to the first end a. The annular limiting portion 1113 is used to support the endoscope snare (an endoscope accessory already available in the prior art) and limit the snare in the axial direction of the barrel 111. The annular limiting portion 1113 can be a flange that surrounds the inner wall surface of the barrel 111 and extends from the inner wall surface of the barrel 111 toward the center of the barrel 111, or it can be a plurality of protrusions spaced apart on the inner wall surface. After the endoscope snare is placed on the annular limiting portion 1113, it is convenient to remove the target object (for example, early cancer and submucosal tumors). In addition to being used in conjunction with an endoscope to perform ligation surgery, the endoscopic ligation device 1 of this embodiment can also be used to remove the target object. When the cable tie 10 is located on the inner wall surface of the cylinder 111, the relative position relationship between the annular limiting portion 1113 and the placement position of the cable tie 10 is as follows: Figure 9 As shown, the cable tie 10 is placed below the annular limiting portion 1113. When the cable tie 10 is placed on the inclined surface of the outer wall of the cylinder 111, the annular limiting portion 1113 is arranged on the inner wall surface of the inclined surface of the cylinder 111, so that the cable tie 10 is always placed below the annular limiting portion 1113 to tie the target object.

[0078] Please refer to Figure 1(a), Figure 1(b), Figure 2 , Figure 10(a), Figure 10(b) and Figure 11In some embodiments, the traction member 121 is made of metal, so that the traction member 121 can be fused at the connection point with the ligation device body. Specifically, using the conductive interface 123 on the endoscopic ligation device, the traction member 121 (e.g., a traction wire) can be energized until it fuses, thereby releasing the ligation device body. It is understood that the traction member 121 can be made of other metal materials as needed, as long as it can be fused.

[0079] The following text describes the installation and use steps of the endoscopic ligation device (using a negative pressure suction device as an example) in an embodiment of the present invention:

[0080] Installation steps:

[0081] (1) The endoscopic ligation device 1 is mounted on the endoscope body 2 through the endoscope fixing portion 13 of the endoscopic ligation device 1;

[0082] (2) Place the cable tie 10 on the inclined surface at the distal end of the outer wall surface of the cylinder 111 (taking the embodiment in which the cable tie 10 is fixed to the outer wall surface of the cylinder 111 as an example, other embodiments may be adaptively adjusted), and fix the cable tie 10 by the ligature fixing member 112, so that the locking portion 102 of the cable tie 10 conflicts with the stop structure 1112;

[0083] (3) The traction member control unit 1212 is used to push the traction member body 1213 out of the outer tube 1211, and the hook portion of the traction member body 1213 is used to hook the connection between the cable tie 10 and the traction member body 1213. A portion of the cable tie 10 is pulled into the interior of the outer tube 1211 through the traction member body 1213.

[0084] Ligation steps:

[0085] (1) The installed endoscopic ligation device 1 is delivered together with the endoscope 2 into the stomach or intestinal cavity of the human body through the oral cavity or anus of the human body;

[0086] (2) Place the bottom end of the barrel 111 on the target mucosal tissue to be ligated, and then draw the target object into the barrel 111 through the working channel of the endoscope 2. After the target object is completely drawn into the barrel 111, the traction member body 1213 is pulled by the traction member control unit 1212, thereby gradually tightening the cable tie 10. In the process of tightening the cable tie 10, the cable tie 10 that is sleeved on the inclined surface at the distal end of the outer wall surface of the barrel 111 (i.e., the inclined surface of the first end a) will slip off the inclined surface position of the barrel 111, thereby being sleeved on the target object. For some embodiments in which the ligation device body is located on the inner wall surface of the barrel, the cable tie 10 is fixed to the inner wall surface of the barrel 111, so that pulling the traction member body 1213 causes the cable tie 10 to be directly sleeved on the target object without the process of slipping off from the barrel 111. Continue to tighten the cable tie 10. A stop structure 1112 is provided on the outer side of the first end a of the barrel 111 to resist the locking portion 102 of the cable tie 10, thereby completely tightening the cable tie 10 to secure the target object. In some embodiments in which a push member is provided, the push member 122 abuts against the ligature body, simultaneously resisting the locking portion 102 and providing a pushing force opposite to the pulling force, thereby ensuring the locking effect of the cable tie 10.

[0087] (3) After the cable tie 10 is tightly wrapped around the target object, the traction member body 1213 is pushed out from the outer tube 1211 by the traction member control unit 1212 to release the cable tie 10, thereby separating the cable tie 10 from the endoscopic ligation device 1; or, another release method is to use the conductive interface 123 of the traction member control unit 1212 to electrically fuse the connection portion located on the traction member body 1213 and connected to the cable tie 10, thereby separating the cable tie 10 from the endoscopic ligation device 1; or, another release method is to separate the cable tie 10 from the endoscopic ligation device 1 by breaking the breakable section of the cable tie 10 when the pulling force of the traction member body 1213 reaches a predetermined force value. Finally, the cable tie 10 remains in the human body, and the endoscopic ligation device 1 is withdrawn from the human body together with the endoscope 2.

[0088] The combined ligation and endoscopic resection procedure is based on the aforementioned ligation procedure, with the following additional steps added: After the installed endoscopic ligation device 1, along with the endoscope 2, is introduced into the gastric or intestinal cavity of the human body through the mouth or anus, the snare of the endoscope 2 is inserted into the barrel 111 of the endoscopic ligation device 1 through the working channel of the endoscope 2. The snare wire is opened and wrapped around the annular stopper 1113 at the distal end (i.e., first end a) of the inner wall surface of the barrel 111. Following the aforementioned ligation procedure, the target object is drawn into the barrel 111. During the process of being drawn in, the target object will also pass through the snare wire. After the target object is completely drawn in, the cable tie 10 is tightened to tightly enclose the target object. The snare wire of the endoscope 2 is then tightened and energized, thereby severing the target object from above the cable tie 10. By using the endoscopic ligation device 1 with the annular limiting portion in the embodiment of the present invention, the target object is ligated with the ligature 10 in advance, and the target object will not bleed or be perforated after resection, thereby improving the efficiency and safety of the operation.

[0089] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An endoscopic ligation device, characterized in that: include: The ligature body is a rope with a locking structure; A ligature installation assembly, comprising a barrel and a ligature fixing member, wherein the ligature fixing member is used to fix the ligature body to the surface of the barrel; The ligature release assembly includes a traction member, wherein the cylinder has a first end and a second end in the axial direction, the first end is farther away from the control end of the traction member than the second end, the traction member is used to connect with the ligature body, and the traction member can drive the ligature body to retract toward the center and separate from the surface of the cylinder; The outer diameter of the cylinder shrinks in at least a partial area in a direction toward the end of the first end, the ligation device fixing member is used to fix the ligation device body to the outer wall surface of the first end of the cylinder, and the traction member is used to drive the ligation device body and the cylinder to move relative to each other so that the ligation device body shrinks toward the center; The distal end of the ligature fixing piece is provided with a bent portion, and the distal end of the bent portion is close to the end surface of the first end of the cylinder, so that the ligature body is clamped between the outer wall surface of the cylinder and the ligature fixing piece and is fixed.

2. The endoscopic ligation device according to claim 1, characterized in that: The endoscopic ligation device further includes a pushing member, which abuts against the ligation device body, and the direction of the force applied by the pushing member to the ligation device body is opposite to the direction of the force applied by the pulling member to the ligation device body.

3. The endoscopic ligation device according to claim 1 or 2, characterized in that: The ligature body is a cable tie with a stop function, and the cable tie includes a cable tie body and a locking portion. The cable tie body has a locking section, and the locking portion is used to allow the locking section to pass through the locking portion only along the tightening direction of the cable tie.

4. The endoscopic ligation device according to claim 3, characterized in that: The endoscopic ligation device is provided with a traction inlet, one end of the tie body passes through the traction inlet to be connected to the traction member, and the endoscopic ligation device is provided with a stop structure at the traction inlet, and the stop structure is used to prevent the locking part from passing through the traction inlet.

5. The endoscopic ligation device according to claim 4, characterized in that: The cable tie body is sequentially provided with a traction connection section, a movable section and a locking section. The movable section is farther away from the locking portion than the locking section. The locking section has a locking structure that cooperates with the locking portion, while the movable section does not have the locking structure.

6. The endoscopic ligation device according to claim 5, characterized in that: A groove structure is provided on the surface of the cable tie body.

7. The endoscopic ligation device according to claim 6, characterized in that: The cable tie body is sequentially provided with a traction connection section, a movable section, a breakable section and a locking section. The movable section is farther away from the locking portion than the locking section. The locking section has a locking structure that cooperates with the locking portion, while the movable section does not have the locking structure. The tensile strength of the breakable section is lower than the tensile strength of the movable section and the tensile strength of the locking section.

8. The endoscopic ligation device according to claim 1 or 2, characterized in that: The ligation device installation assembly is integrally formed.

9. The endoscopic ligation device according to claim 1, characterized in that: The endoscopic banding device further comprises an endoscope fixing portion, which is used to fix the endoscopic banding device on an endoscope.

10. The endoscopic ligation device according to claim 1, characterized in that: The barrel is provided with an annular limiting portion on the inner wall surface, and the annular limiting portion is used to support the snare of the endoscope and limit the snare in the axial direction of the barrel.

11. The endoscopic ligation device according to claim 1, characterized in that: The pulling member is made of metal, so that the pulling member at the connection position between the pulling member and the ligation device body can be fused by electricity.

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