Pre-loaded ligator

Abstract

The present disclosure relates to the technical field of medical treatment appliances. Provided is a pre-loaded ligator. The pre-loaded ligator provided in the present disclosure comprises: a transparent end cap, pull wires, ligation bands, a flexible tube member and a handle assembly. The distal end of the flexible tube member is connected to the transparent end cap, and the proximal end of the flexible tube member is connected to the handle assembly; the ligation bands are sleeved on the transparent end cap; the pull wires pass through the flexible tube member, the proximal ends of the pull wires being connected to the handle assembly and the distal ends of the pull wires being in transmission connection with the ligation bands. The handle assembly can pull the pull wires to tension same in the flexible tube member, and, by means of the pull wires, drive the ligation bands to fall off of and thus be released from the transparent end cap, so that occupation of an endoscopic forceps channel is not needed and damage to human tissue caused by tensioned pull wires can be prevented. In addition, pre-loading the ligator avoids time consumed for installation during surgery and avoids the potential risks of installation errors due to tight time during surgery, thereby facilitating the use for doctors better.

Description

Preassembled ligation device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202410780533X, filed on June 17, 2024, entitled "Preassembled ligation device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of medical devices, in particular to a preassembled ligation device. BACKGROUND

[0004] Traditional ligation devices need to be assembled before surgery, which not only consumes a lot of time, but also is prone to installation errors under the tense medical conditions, thereby causing device failure and even medical accidents. In addition, the ligation device relies on the operation of the release device occupying the endoscope forceps channel, which occupies the space of auxiliary devices inserted through the endoscopic forceps channel and causes the loss of the negative pressure function of the forceps channel. Furthermore, if the pull wire for driving the release of the ligation ring is placed outside the inner diameter forceps channel, although the internal space of the forceps channel can be avoided, the human body tissue is prone to be scraped and cut when the pull wire is pulled tight. When multiple ligation rings are simultaneously loaded for continuous release and ligation, the multiple ligation rings have a large axial extension size, which further limits the endoscopic field of view, thereby affecting the visibility of the surgery. SUMMARY

[0005] The purpose of the present disclosure is to provide a preassembled ligation device to solve the technical problem of the release of the traditional ligation device occupying the endoscope forceps channel.

[0006] In a first aspect, the present disclosure provides a preassembled ligation device, comprising: a transparent end cap, a pull wire, a ligation ring, a flexible tube, and a handle assembly.

[0007] The distal end of the flexible tube is connected to the transparent end cap, and the proximal end of the flexible tube is connected to the handle assembly.

[0008] The ligation ring is sleeved on the transparent end cap, the pull wire passes through the flexible tube, and the proximal end of the pull wire is connected to the handle assembly and the distal end is drivingly connected to the ligation ring.

[0009] In combination with the first aspect, the present disclosure provides a first possible implementation manner of the first aspect, wherein the inner wall of the transparent end cap is provided with a groove, and the pull wire extends to the distal end of the inner cavity of the transparent end cap through the groove.

[0010] In combination with the first possible implementation manner of the first aspect, the present disclosure provides a second possible implementation manner of the first aspect, wherein the side wall of the transparent end cap is provided with a wire inlet, and the wire inlet is in communication with the groove.

[0011] The pull wire extends through the wire inlet and the groove to the distal end of the inner cavity of the transparent end cap.

[0012] In combination with the first aspect, the present disclosure provides a third possible implementation of the first aspect, wherein the inner wall of the transparent end cap is provided with a convex ring part matched with the distal end of the endoscope.

[0013] In combination with the first aspect, the present disclosure provides a fourth possible implementation of the first aspect, wherein the proximal end of the transparent end cap is connected with an elastic cap, and the elastic cap is configured to detachably cover the distal end of the endoscope.

[0014] In combination with the fourth possible implementation of the first aspect, the present disclosure provides a fifth possible implementation of the first aspect, wherein the transparent end cap is provided with a first axial limiting part, and the elastic cap is provided with a second axial limiting part matched with the first axial limiting part.

[0015] In combination with the first aspect, the present disclosure provides a sixth possible implementation of the first aspect, wherein a plurality of the ligation loops are sequentially covered on the transparent end cap along the axial direction.

[0016] The pull wire is arranged through the inner cavity of the transparent end cap from the proximal end to the distal end, and the pull wire extends from the distal end to the proximal end along the outer wall of the transparent end cap to form a trigger segment.

[0017] The trigger segment is compressed on the inner side of the plurality of ligation loops, and the trigger segment is provided with a plurality of protruding parts, which are arranged at intervals along the trigger segment, so that each ligation loop has the protruding part on the proximal side.

[0018] In combination with the sixth possible implementation of the first aspect, the present disclosure provides a seventh possible implementation of the first aspect, wherein the pull wire is single or multiple.

[0019] In the case of multiple pull wires, the multiple pull wires form the trigger segments respectively, and any two adjacent ligation loops have a plurality of protruding parts arranged at intervals along the circumferential direction of the ligation loop.

[0020] In combination with the sixth possible implementation of the first aspect, the present disclosure provides an eighth possible implementation of the first aspect, wherein the trigger segment extends around the ligation loop to form a transition segment between any two adjacent ligation loops.

[0021] In combination with the first aspect, the present disclosure provides a ninth possible implementation of the first aspect, wherein the handle assembly comprises a handle support, a winding wheel shaft, and a locking part.

[0022] The winding wheel shaft is rotationally connected to the handle support, and the winding wheel shaft is provided with a detent.

[0023] The locking part is mounted on the handle support, and the locking part is detachably matched with the detent.

[0024] With reference to the ninth possible implementation manner of the first aspect, the present disclosure provides a tenth possible implementation manner of the first aspect, wherein the winding wheel shaft comprises a roller and a shaft rod, the roller is mounted on the shaft rod, and the roller is coaxial with the shaft rod and is positioned in the circumferential direction;

[0025] The roller and / or the shaft rod is provided with a clamping position.

[0026] With reference to the tenth possible implementation manner of the first aspect, the present disclosure provides an eleventh possible implementation manner of the first aspect, wherein the handle support or the winding wheel shaft is connected with a limiting piece;

[0027] In the state that the locking piece is matched with the clamping position, the locking piece is matched with the limiting piece to prevent the locking piece from being separated from the clamping position.

[0028] With reference to the ninth possible implementation manner of the first aspect, the present disclosure provides a twelfth possible implementation manner of the first aspect, wherein the handle support is provided with a clamping part, and the winding wheel shaft is provided with a plurality of circumferential positioning parts which are arranged in the circumferential direction of the winding wheel shaft;

[0029] The clamping part is matched with the circumferential positioning part, and at least one of them is elastic, so that the plurality of circumferential positioning parts can be separated and engaged with the clamping part one by one.

[0030] With reference to the twelfth possible implementation manner of the first aspect, the present disclosure provides a thirteenth possible implementation manner of the first aspect, wherein at least one of the clamping part and the circumferential positioning part has a one-way limiting part, so that the winding wheel shaft rotates in one direction relative to the handle support to wind the pull wire on the winding wheel shaft.

[0031] With reference to the twelfth possible implementation manner of the first aspect, the present disclosure provides a fourteenth possible implementation manner of the first aspect, wherein the circumferential positioning part has a clamping part extending in the radial direction of the winding wheel shaft.

[0032] When the winding wheel shaft rotates in the direction of tightening the pull wire, the clamping part is matched with the circumferential positioning part along the clamping part to generate a collision prompt sound.

[0033] With reference to the twelfth possible implementation manner of the first aspect, the present disclosure provides a fifteenth possible implementation manner of the first aspect, wherein the winding wheel shaft is provided with a number corresponding to the circumferential positioning part, the number corresponds to the loop ligature one by one, and the handle support is provided with an indication mark pointing to the number.

[0034] With reference to the ninth possible implementation manner of the first aspect, the present disclosure provides a sixteenth possible implementation manner of the first aspect, wherein the handle support is connected with a handle base, and the handle base is detachably connected with the endoscope.

[0035] With reference to the ninth possible implementation manner of the first aspect, the present disclosure provides a seventeenth possible implementation manner of the first aspect, wherein the handle support is provided with a pipe joint, the proximal end of the flexible pipe is connected to the pipe joint, and the pipe joint is provided with a wire inlet hole and a water injection hole.

[0036] With reference to the first aspect, the present disclosure provides an eighteenth possible implementation manner of the first aspect, wherein the flexible pipe is configured as a flexible metal pipe or a flexible polymer pipe.

[0037] Alternatively, the flexible pipe comprises a metal bare pipe and a polymer protective film covering the outer side of the metal bare pipe.

[0038] The present disclosure has the following beneficial effects: the flexible pipe is connected between the transparent end cap and the handle assembly, the snare is sleeved on the transparent end cap, the pull wire passes through the flexible pipe, one end of the pull wire is connected to the handle assembly, and the other end of the pull wire is drivingly connected to the snare, the pull wire is tensioned in the flexible pipe by the handle assembly, and the snare is released from the transparent end cap by the pull wire, the endoscope forceps channel is not occupied, and human tissue damage caused by the tensioned pull wire is avoided.

[0039] In order to make the above objectives, characteristics and advantages of the present disclosure more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the specific embodiments or related art, the following will briefly introduce the drawings needed to be used in the specific embodiments or related art descriptions. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0041] FIG. 1 is a schematic view of a preassembled snare provided by an embodiment of the present disclosure;

[0042] FIG. 2 is a schematic view of a preassembled snare and an endoscope provided by an embodiment of the present disclosure;

[0043] FIG. 3 is a schematic view of another preassembled snare provided by an embodiment of the present disclosure;

[0044] FIG. 4 is a partial enlarged schematic view of the preassembled snare provided by an embodiment of the present disclosure;

[0045] FIG. 5 is a partial enlarged top view of the preassembled snare provided by an embodiment of the present disclosure;

[0046] FIG. 6 is a schematic view of a transparent end cap, a pull wire, a snare and an elastic cap of the preassembled snare provided by an embodiment of the present disclosure;

[0047] Fig. 7 is a schematic view of a transparent end cap of a preloaded ligation device according to an embodiment of the present disclosure;

[0048] Fig. 8 is a schematic view of a transparent end cap of a preloaded ligation device according to an embodiment of the present disclosure;

[0049] Fig. 9 is a schematic view of an elastic cap of a preloaded ligation device according to an embodiment of the present disclosure;

[0050] Fig. 10 is a schematic view of a preloaded ligation device and an endoscope according to an embodiment of the present disclosure;

[0051] Fig. 11 is a schematic view of a preloaded ligation device and an endoscope according to an embodiment of the present disclosure;

[0052] Fig. 12 is a sectional view of a handle assembly of a preloaded ligation device according to an embodiment of the present disclosure;

[0053] Fig. 13 is a schematic view of a handle assembly of a preloaded ligation device according to an embodiment of the present disclosure;

[0054] Fig. 14 is a sectional view of a handle assembly of a preloaded ligation device according to an embodiment of the present disclosure;

[0055] Fig. 15 is a schematic view of a handle assembly of a preloaded ligation device according to an embodiment of the present disclosure;

[0056] Fig. 16 is an exploded view of a winding wheel shaft of a preloaded ligation device according to an embodiment of the present disclosure;

[0057] Fig. 17 is a schematic view of a handle support and a winding wheel shaft of a preloaded ligation device according to an embodiment of the present disclosure;

[0058] Fig. 18 is a schematic view of a locking member of a preloaded ligation device according to an embodiment of the present disclosure;

[0059] Fig. 19 is a schematic view of another locking member of a preloaded ligation device according to an embodiment of the present disclosure.

[0060] Icon: 001 - transparent end cap; 101 - groove; 102 - wire inlet; 103 - first axial limiting portion; 104 - convex ring portion; 002 - pull wire; 201 - main wire; 210 - trigger section; 211 - convex portion; 212 - transition section; 003 - ligation ring; 004 - elastic cap; 401 - second axial limiting portion; 005 - flexible tube; 006 - handle support; 601 - clamping portion; 602 - slot; 603 - tube joint; 007 - winding wheel shaft; 701 - clamping position; 702 - circumferential positioning portion; 710 - roller; 720 - shaft; 008 - locking piece; 801 - bevel clamping block; 802 - first connector; 803 - second connector; 009 - limiting piece; 010 - handle base; 011 - endoscope; 111 - proximal end of the mirror body. DETAILED DESCRIPTION

[0061] The technical solutions of the present disclosure will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0062] In the description of the present disclosure, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first", "second", "third" are only used for the difference in name, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, such as no separate marking, should be understood as the basic quantities of the International System of Units, or the derived quantities derived from the basic quantities by multiplication, division, differentiation or integration, etc. mathematical operation.

[0063] In the description of the present disclosure, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. In this paper, "proximal end" and "distal end" are referred to the product operator, the end located in the body, which can be handheld, is the proximal end, and the end implanted in the patient's body, far away from the operator, is the distal end. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0064] As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 7, the preloaded ligation device provided by the embodiment of the present disclosure comprises a transparent end cap 001, a pull wire 002, a ligation ring 003, a flexible tube 005 and a handle assembly; the distal end of the flexible tube 005 is connected with the handle assembly, and the proximal end of the flexible tube 005 is connected with the handle assembly; the ligation ring 003 is sleeved on the transparent end cap 001, the pull wire 002 passes through the flexible tube 005, and the proximal end of the pull wire 002 is connected with the handle assembly and the distal end is drivingly connected with the ligation ring 003.

[0065] In the embodiment of the present disclosure, the pull wire 002 is accommodated in the flexible tube 005, which not only does not occupy the endoscope channel, but also can avoid the damage to human tissues caused by the exposure of the pull wire 002. In addition, the flexible tube 005 is supported between the transparent end cap 001 and the handle assembly, the pull wire 002 is pulled by the handle assembly, and the position of the transparent end cap 001 is stable, and the operation is more convenient.

[0066] Further, the ligation ring 003 is provided with a plurality of ligation rings 003, and the plurality of ligation rings 003 are sequentially sleeved on the transparent end cap 001 in the axial direction; the pull wire 002 passes through the inner cavity of the transparent end cap 001 from the proximal end to the distal end, and the pull wire 002 extends from the distal end to the proximal end along the outer wall of the transparent end cap 001 to form a trigger section 210; the trigger section 210 is pressed on the inner side of the plurality of ligation rings 003, and the trigger section 210 is provided with a plurality of protruding portions 211, and the plurality of protruding portions 211 are arranged at intervals along the trigger section 210, so that each ligation ring 003 has the protruding portion 211 on the proximal end side. The plurality of ligation rings 003 are preloaded and sleeved on the transparent end cap 001, without repeatedly inserting and pulling out the endoscope and installing the ligation ring 003, thereby shortening the time required for ligation operation.

[0067] When the proximal end of the pull wire 002 is pulled, the pull wire 002 located on the inner side of the transparent end cap 001 slides towards the proximal end, and then the trigger section 210 slides towards the distal end along the outer wall of the transparent end cap 001, and the ligation ring 003 is pushed off the transparent end cap 001 by the protruding portion 211 to achieve release and ligation. With the pulling of the pull wire 002, the plurality of ligation rings 003 can be successively pushed off by the protruding portion 211, thereby achieving continuous release.

[0068] In the embodiment, the trigger section 210 can form the protruding portion 211 in the form of knotting, and the trigger section 210 can also be fixedly connected with a ball as the protruding portion 211. When the plurality of ligation rings 003 are closely arranged and sleeved on the transparent end cap 001 in the axial direction, the protruding portion 211 located between any two adjacent ligation rings 003 can be almost shielded by the elastically deformed ligation ring 003, thereby avoiding the exposure of the protruding portion 211 to cause the scratch of human tissues.

[0069] Further, the pull wire 002 is provided with a single wire or multiple wires. In the case of multiple pull wires 002, the multiple pull wires 002 respectively form the trigger section 210, and any two adjacent snare loops 003 have multiple protruding portions 211 arranged at intervals along the circumference of the snare loop 003. The multiple trigger sections 210 can be simultaneously arranged in the same snare loop 003, which not only ensures that the snare loop 003 can be smoothly dropped, but also avoids the snare loop 003 from being skewed during the dropping process.

[0070] The trigger section 210 extends between any two adjacent snare loops 003 to form a transition section 212 around the transparent end cap 001.

[0071] Since the single pulling of the pull wire 002 cannot be too small, otherwise it is difficult to accurately release a single snare loop 003, and it is extremely likely that multiple snare loops 003 will be released due to excessive pulling of the pull wire 002. The transition section 212 extends between any two adjacent snare loops 003 around the snare loop 003, the transition section 212 extends around the transparent end cap 001, and the central angle corresponding to the transition section 212 can be configured to be 90 degrees to 180 degrees. After the previous snare loop 003 is released, the length of the pull wire 002 needs to be pulled beyond the transition section 212 to release the next snare loop 003, which reduces the accuracy requirement of the operation of the pull wire 002 and reduces the risk of misoperation.

[0072] Referring to FIGS. 5 and 6, in a more preferred embodiment, two pull wires 002 can be arranged at the distal end. The two pull wires 002 extend distally through the groove 101 in the inner wall of the transparent end cap 001, and are bent proximally along the outer wall of the transparent end cap 001, respectively. The protruding portions 211 simultaneously apply a distally directed force at a position about 180 degrees apart in the circumference of the snare loop 003, thereby achieving the release action of a snare loop 003. To ensure the synchronicity of the two pull wires 002, the two pull wires 002 can be convergently connected to the main wire 201, which extends along the flexible tube 005 and is connected to the snare release handle.

[0073] As shown in FIGS. 2, 6 and 7, the inner wall of the transparent end cap 001 is provided with a groove 101, and the pull wire 002 extends to the distal end of the inner cavity of the transparent end cap 001 through the groove 101.

[0074] The pull wire 002 extends distally through the groove 101, which can reduce the obstruction of the pull wire 002 to the inner cavity of the transparent end cap 001, thereby avoiding the obstruction of the pull wire 002 to the line of sight of the endoscope 011. In addition, when the lens end of the endoscope 011 is inserted into the transparent end cap 001, the pull wire 002 is accommodated through the groove 101, thereby avoiding the pull wire 002 being compressed between the inner wall of the transparent end cap 001 and the endoscope 011, and thereby ensuring that the pull wire 002 can be pulled smoothly.

[0075] In addition, the side wall of the transparent end cap 001 is provided with a wire inlet 102 which is in communication with the groove 101; the pull wire 002 extends to the distal end of the inner cavity of the transparent end cap 001 through the wire inlet 102 and the groove 101, and the distal end of the flexible tube 005 can be connected to the wire inlet 102; the pull wire enters the wire inlet 102 along the flexible tube 005, and then extends to the distal end of the inner cavity of the transparent end cap 001 through the groove 101, and then reverses to the proximal end along the outer wall of the transparent end cap 001 to form a trigger section 210.

[0076] In an optional embodiment, the distal end of the endoscope 011 can be inserted into the elastic cap 004, and in this state, the distal end of the endoscope 011 is limited by the plurality of ligation loops 003, and the field of view of the endoscope 011 is smaller.

[0077] In this embodiment, referring to FIG. 10, the inner wall of the transparent end cap 001 is provided with a convex ring portion 104 which is adapted to the endoscope 011; the lens end of the endoscope 011 can be inserted into the transparent end cap 001 and abut against the convex ring portion 104, so that the lens end of the endoscope 011 is moved forward, which is beneficial to expand the field of view. In the case that the transparent end cap is made of transparent material, the number of ligation loops 003 in the field of view of the forward endoscope 011 is reduced, and a wider field of view is obtained.

[0078] As shown in FIGS. 1, 2, 3, 4, 5, 6 and 11, in the embodiment of the present disclosure, the transparent end cap 001 is connected with the elastic cap 004 at the proximal end, and the elastic cap 004 is configured to be detachably sleeved on the distal end of the endoscope 011.

[0079] The elastic cap 004 can be deformed radially to be closely sleeved on the lens end of the endoscope 011. In addition, through the elastic deformation and bending of the elastic cap 004, a small amplitude bending of the transparent end cap 001 relative to the endoscope 011 can also be achieved, thereby facilitating the placement in a narrow area.

[0080] Further, the transparent end cap 001 is provided with a first axial limiting portion 103, and the elastic cap 004 is provided with a second axial limiting portion 401 which is adapted to the first axial limiting portion 103.

[0081] One of the first axial limiting portion 103 and the second axial limiting portion 401 can be configured as a protrusion, and the other can be configured as a groove which is adapted to the protrusion; through the cooperation of the first axial limiting portion 103 and the second axial limiting portion 401, the elastic cap 004 can be axially fixed relative to the transparent end cap 001. In addition, the connection between the first axial limiting portion 103 and the second axial limiting portion 401 can also be reinforced by adhesion.

[0082] As shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 10, in the embodiment, the handle assembly comprises a handle support 006, a winding wheel shaft 007 and a locking piece 008; the winding wheel shaft 007 is rotationally connected to the handle support 006, and the winding wheel shaft 007 is provided with a clamping site 701; the locking piece 008 is installed on the handle support 006, and the locking piece 008 is detachably fitted in the clamping site 701. When the locking piece 008 is fitted in the clamping site 701, the winding wheel shaft 007 can be locked to avoid the release of the loop ligature 003 caused by the accidental touch of the operator.

[0083] The proximal end of the pull wire 002 can be connected and wound on the winding wheel shaft 007, and the rotation of the winding wheel shaft 007 can continue to wind the pull wire 002 on the winding wheel shaft 007, thereby realizing the tightening of the pull wire 002. The locking piece 008 can be detachably connected with the clamping site 701 through threads, buckles and the like. When the locking piece 008 is fitted in the clamping site 701, the winding wheel shaft 007 is locked relative to the handle support 006, thereby realizing the locking of the winding wheel shaft 007. When the pull wire 002 is configured to release the loop ligature 003, the locking of the winding wheel shaft 007 can avoid the accidental release of the loop ligature 003.

[0084] As shown in FIG. 12, FIG. 13 and FIG. 14, in the alternative embodiment, the locking piece 008 can be provided with a first connector 802 and a second connector 803. The first connector 802 can be configured as a cross-shaped structure and is adapted to the clamping site 701. The second connector 803 is located outside the first connector 802 and can be inserted into the slot 602 on the handle support 006.

[0085] As shown in FIG. 12, FIG. 14 and FIG. 16, the winding wheel shaft 007 comprises a roller 710 and a shaft 720. The roller 710 is installed on the shaft 720, and the roller 710 is coaxial with the shaft 720 and is positioned in the circumferential direction. The roller 710 and / or the shaft 720 is provided with the clamping site 701.

[0086] The clamping site 701 can be provided on the roller 710 or the shaft 720, or the clamping site 701 can be provided on the roller 710 and the shaft 720 respectively. The clamping site 701 can be configured as a protrusion or a slot, etc. The locking piece 008 is fixed relative to the handle support 006 and is fitted in the clamping site 701, thereby realizing the circumferential locking of the winding wheel shaft 007.

[0087] As shown in FIG. 12 and FIG. 13, the handle support 006 or the winding wheel shaft 007 is connected with a limiting piece 009. In the state that the locking piece 008 is fitted in the clamping site 701, the locking piece 008 is fitted in the limiting piece 009 to prevent the locking piece 008 from being separated from the clamping site 701.

[0088] The locking member 008 is provided with an inclined angle clamping block 801, and the locking member 008 can pass through the handle support 006 and be inserted into the clamping position 701, so as to realize the circumferential locking of the winding wheel shaft 007. In addition, during the insertion of the locking member 008, the inclined angle clamping block 801 is resisted by the inclined surface of the limiting member 009. When the locking member 008 is matched with the clamping position 701, the inclined angle clamping block 801 passes over the limiting member 009 and is limited to return by the limiting member 009, so as to realize the locking of the locking member 008 and avoid the loosening of the locking member 008.

[0089] In an optional embodiment, the locking member 009 can also be a buckle, a positioning pin or a threaded fastener.

[0090] As shown in FIGS. 14, 15, 16 and 17, the handle support 006 is provided with a clamping portion 601, and the winding wheel shaft 007 is provided with a plurality of circumferential positioning portions 702 which are arranged at intervals along the circumference of the winding wheel shaft 007. The clamping portion 601 is matched with the circumferential positioning portions 702, and at least one of them is elastic, so that the plurality of circumferential positioning portions 702 can be separated and engaged with the clamping portion 601 one by one.

[0091] Further, the circumferential positioning portion 702 has a clamping portion 703 extending radially along the winding wheel shaft 007. When the winding wheel shaft 007 rotates in the direction of tightening the pull wire 002, the clamping portion 601 is matched with the circumferential positioning portion 702 along the clamping portion 703 to produce a collision prompt sound. In addition, the winding wheel shaft 007 is provided with a number corresponding to the circumferential positioning portion 702, and the number corresponds to the loop 003 one by one. The handle support 006 is provided with an indicating mark pointing to the number.

[0092] When the winding wheel shaft 007 rotates to any circumferential positioning portion 702 matched with the clamping portion 601, the clamping portion 601 slides along the clamping portion 703 to the circumferential positioning portion 702 to realize rapid matching and produce a collision prompt sound, which also makes the operator feel a pause when operating the winding wheel shaft 007, so as to prompt the operator that the winding wheel shaft 007 has rotated a certain angle. Through installation and adjustment, the winding wheel shaft 007 can rotate from one circumferential positioning portion 702 matched with the clamping portion 601 to the next circumferential positioning portion 702 matched with the clamping portion 601, so as to realize the switching of the position corresponding to the indicating mark and make the distance of the pull wire 002 pulled just enough to drop one loop 003 from the far end of the transparent end cap 001. The central angles corresponding to the adjacent two circumferential positioning portions 702 can be adjusted, and the clamping portion 601 realizes a release action every time it is matched with a circumferential positioning portion 702, so as to number the circumferential positioning portions 702, thereby facilitating the doctor to know the release times, the released loop 003 and the number of remaining loops 003.

[0093] In other words, a plurality of labels are evenly arranged along the circumference of the winding wheel shaft 007 to indicate the number of released loop ligature, the labels can display the total number and the current released number of loop ligatures 003 in fractional form, the handle support 006 is provided with a marking position pointing to the winding wheel shaft 007, when the clamping part 601 is matched with a circumferential positioning part 702, the marking position points to the corresponding label, so that the doctor can clearly know how many loop ligatures 003 are released and how many loop ligatures 003 are left.

[0094] At least one of the clamping part 601 and the circumferential positioning part 702 has a one-way limiting part, so that the winding wheel shaft 007 rotates relative to the handle support 006 in one direction to wind the pull wire 002 on the winding wheel shaft 007. The one-way limiting part can be configured as a ratchet structure, or the one-way limiting part is configured as an inclined surface arranged on the clamping part 601 or the circumferential positioning part 702, inclined in the direction away from the rotation axis of the winding wheel shaft 007 along the circumference of the winding wheel shaft 007, which can limit the winding wheel shaft 007 to be screwed in only one direction to tighten the pull wire 002.

[0095] As shown in FIGS. 2 and 10, the handle support 006 is connected with a handle base 010, which is detachably connected with the proximal end 111 of the scope body of the endoscope 011. The handle base 010 can be detachably connected with the endoscope 011 in the form of a hook, an elastic clamp or a bandage, so as to realize the combined use of the handle assembly and the endoscope 011.

[0096] As shown in FIGS. 10 and 13, in an optional embodiment, the handle support 006 is provided with a pipe joint 603, the proximal end of the flexible pipe 005 is connected with the pipe joint 603, and the pipe joint 603 has a wire inlet hole and a water injection hole. Liquid can be injected into the flexible pipe 005 through the water injection hole of the pipe joint 603, and the liquid flows to the distal end of the endoscope 011 through the flexible pipe 005, so as to realize the flushing of the endoscope lens, the transparent end cap 001 and the lesion position.

[0097] In addition, as shown in FIGS. 1, 2, 16, 17 and 19, an extension section extending towards the gripping section of the endoscope 011 can be arranged on the hand touch part of the locking part 008, and the extension section is inclined and tilted outward, so as to manually operate the locking part 008 to be separated from the winding wheel shaft 007.

[0098] As shown in FIGS. 1, 2, 3 and 10, the flexible pipe 005 is configured as a flexible metal pipe or a flexible polymer pipe; or the flexible pipe 005 comprises a metal bare pipe and a polymer protective film covering the outer side of the metal bare pipe. Specifically, the flexible pipe 005 can be a flexible metal spring pipe, a flexible metal mesh pipe, a flexible metal bellows pipe, etc. In addition to the metal bare pipe, a flexible pipe made of polymer material can also be used, or a polymer protective film such as a PE film is used to cover the metal bare pipe.

[0099] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit the present disclosure. Although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure. Industrial applicability

[0100] In summary, the embodiments of the present disclosure provide a preloaded ligation device, which can avoid damage to human tissues caused by tensioned pull wires, and achieve preloading of the ligation device, avoid time-consuming installation during surgery, avoid the hidden danger of errors caused by nervous installation during surgery, and be more convenient for doctors to use.

Claims

1. A pre-installed ligation device, characterized in that, include: Transparent end cap (001), pull wire (002), sling (003), flexible tube (005) and handle assembly; The distal end of the flexible tube (005) is connected to the transparent end cap (001), and the proximal end of the flexible tube (005) is connected to the handle assembly; The ligature (003) is fitted onto the transparent end cap (001), the pull wire (002) passes through the flexible tube (005), and the proximal end of the pull wire (002) is connected to the handle assembly, and the distal end is connected to the ligature (003).

2. The pre-installed ligator according to claim 1, characterized in that, The inner wall of the transparent end cap (001) is provided with a groove (101), and the pull wire (002) extends through the groove (101) to the far end of the inner cavity of the transparent end cap (001).

3. The pre-installed ligator according to claim 2, characterized in that, The transparent end cap (001) has a wire inlet (102) on its side wall, and the wire inlet (102) is connected to the groove (101); The pull wire (002) extends through the inlet (102) and the groove (101) to the far end of the inner cavity of the transparent end cap (001).

4. The pre-installed ligator according to any one of claims 1-3, characterized in that, The inner wall of the transparent end cap (001) is provided with a convex ring (104) that is adapted to the distal end of the endoscope (011).

5. The pre-installed ligator according to any one of claims 1-4, characterized in that, The transparent end cap (001) is connected to an elastic cap (004) at its proximal end, and the elastic cap (004) is configured to detachably cover the distal end of the endoscope (011).

6. The pre-installed ligator according to claim 5, characterized in that, The transparent end cap (001) is provided with a first axial limiting part (103), and the elastic cap (004) is provided with a second axial limiting part (401) that is adapted to the first axial limiting part (103).

7. The pre-installed ligator according to any one of claims 1-6, characterized in that, The ligature rings (003) are provided in multiple ways, and the multiple ligature rings (003) are sequentially sleeved on the transparent end caps (001) along the axial direction; The pull wire (002) passes through the inner cavity of the transparent end cap (001) from the proximal end to the distal end, and the pull wire (002) extends from the distal end along the outer wall of the transparent end cap (001) to the proximal end to form a trigger segment (210); The trigger segment (210) is pressed against the inside of the plurality of ligatures (003), and the trigger segment (210) is provided with a plurality of protrusions (211), which are spaced apart along the trigger segment (210) so that each ligature (003) has a protrusion (211) on its proximal side.

8. The pre-installed ligator according to claim 7, characterized in that, The pull wire (002) may have one or more strands; When multiple pull wires (002) are provided, the multiple pull wires (002) respectively form the trigger segment (210); between any two adjacent loops (003), there are multiple protrusions (211) spaced apart along the circumference of the loops (003).

9. The pre-installed ligator according to claim 7 or 8, characterized in that, The trigger segment (210) extends around the ligature (003) between any two adjacent ligatures (003) to form a transition segment (212).

10. The pre-installed ligator according to any one of claims 1-9, characterized in that, The handle assembly includes: a handle bracket (006), a winding wheel shaft (007), and a locking element (008); The winding wheel shaft (007) is rotatably connected to the handle bracket (006), and the winding wheel shaft (007) is provided with a locking position (701); The locking member (008) is installed on the handle bracket (006), and the locking member (008) is detachably engaged with the locking position (701).

11. The pre-installed ligator according to claim 10, characterized in that, The winding wheel shaft (007) includes: a roller (710) and a shaft (720), wherein the roller (710) is mounted on the shaft (720), and the roller (710) is coaxial with the shaft (720) and positioned circumferentially; The roller (710) and / or the shaft (720) are provided with the locking position (701).

12. The pre-installed ligator according to claim 11, characterized in that, The handle bracket (006) or the winding wheel shaft (007) is connected to a limiting member (009); When the locking member (008) is engaged with the locking position (701), the locking member (008) is engaged with the limiting member (009) to prevent the locking member (008) from disengaging from the locking position (701).

13. The pre-installed ligator according to any one of claims 10-12, characterized in that, The handle bracket (006) is provided with a snap-fit ​​part (601), and the winding wheel shaft (007) is provided with a plurality of circumferential positioning parts (702), and the plurality of circumferential positioning parts (702) are arranged at intervals along the circumference of the winding wheel shaft (007); The snap-fit ​​portion (601) is adapted to the circumferential positioning portion (702), and at least one of them is elastic, so that the plurality of circumferential positioning portions (702) can be separably engaged with the snap-fit ​​portion (601) one by one.

14. The pre-installed ligator according to claim 13, characterized in that, At least one of the snap-fit ​​portion (601) and the circumferential positioning portion (702) has a one-way limiting portion, so that the winding wheel shaft (007) rotates unidirectionally relative to the handle bracket (006) to wind the pull wire (002) onto the winding wheel shaft (007).

15. The pre-installed ligator according to claim 13 or 14, characterized in that, The circumferential positioning part (702) has a locking part (703) extending radially along the winding wheel shaft (007); When the winding wheel shaft (007) rotates in the direction of tightening the pull wire (002), the locking part (601) engages with the circumferential positioning part (702) along the locking part (703) to generate a collision warning sound.

16. The pre-installed ligator according to any one of claims 13-15, characterized in that, The winding wheel shaft (007) is provided with a number corresponding to the circumferential positioning part (702), and the number corresponds one-to-one with the loop (003). The handle bracket (006) is provided with an indicator mark pointing to the number.

17. The pre-installed ligator according to any one of claims 10-16, characterized in that, The handle bracket (006) is connected to the handle base (010), and the handle base (010) is detachably connected to the endoscope (011).

18. The pre-installed ligator according to any one of claims 10-17, characterized in that, The handle bracket (006) is provided with a pipe fitting connector (603), and the proximal end of the flexible pipe (005) is connected to the pipe fitting connector (603). The pipe fitting connector (603) has a wire inlet hole and a water injection hole.

19. The pre-installed ligator according to any one of claims 1-18, characterized in that, The flexible tube (005) is configured as a flexible metal tube or a flexible polymer tube; Alternatively, the flexible tube (005) may include a bare metal tube and a polymer protective film covering the outside of the bare metal tube.

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