Continuous ligation mechanism and pre-assembled ligation device

Abstract

The present disclosure relates to the technical field of medical instruments. Provided are a continuous ligation mechanism and a pre-assembled ligation device. The continuous ligation mechanism provided in the present disclosure comprises: an end cap, pull wires and ligation loops, wherein the ligation loops are sleeved on the end cap, the inner wall of the end cap is provided with a groove, and the pull wires extend to a distal end of an inner cavity of the end cap via the groove; the side wall of the end cap is provided with a wire inlet, and the wire inlet is in communication with the groove; and the pull wires extend to the distal end of the inner cavity of the end cap via the wire inlet and the groove, and the pull wires extend along the outer wall of the end cap from the distal end to a proximal end, so as to form trigger sections configured to release the ligation loops from the distal end of the end cap. The pull wires can extend along a flexible tubular member, and is nearly parallel to an endoscope, the end cap is connected to a distal end of the endoscope, and the continuous ligation mechanism can be pre-assembled, avoiding assembly errors during an operation, shortening the time period of surgical operations; in addition, it is unnecessary to occupy an endoscopic forceps passage, and the field of view of the endoscope is broader, further facilitating surgical operations.

Description

Continuous ligation mechanism and preloaded ligation device

[0001] Cross Reference to Related Applications

[0002] The present disclosure claims priority to the Chinese patent application No. 2024213802404, filed on June 17, 2024, entitled "Continuous ligation mechanism and preloaded 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, and particularly to a continuous ligation mechanism and a preloaded 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. Moreover, the ligation device can usually only carry a single ligation ring, and when multiple ligation is required, multiple operations of placing and releasing the ligation ring are usually needed, which increases the operation burden of the operator and causes low surgical efficiency. In addition, when the pull wire is used to drive the release of the ligation ring, the pull wire and the ligation ring are prone to relative sliding, thereby there is a risk of failure of the ligation ring release. When the ligation device is placed and released, the endoscope forceps channel space is usually occupied, thereby other surgical devices are difficult to be freely arranged in the endoscope forceps channel, and the ligation device limits the field of view of the endoscope, affecting the observation of the surgical site by the operator.

[0005] SUMMARY

[0006] The purpose of the present disclosure is to provide a continuous ligation mechanism and a preloaded ligation device to solve the technical problem of ligation mechanism occupying the endoscope forceps channel space and limiting the field of view of the endoscope.

[0007] In a first aspect, the present disclosure provides a continuous ligation mechanism, comprising: an end cap, a pull wire, and a ligation ring.

[0008] The ligation ring is sleeved on the end cap.

[0009] The inner wall of the end cap is provided with a groove, and the pull wire extends to the distal end of the inner cavity of the end cap through the groove.

[0010] The side wall of the end cap is provided with a wire inlet, and the wire inlet is in communication with the groove.

[0011] The pull wire extends to the distal end of the inner cavity of the end cap through the wire inlet and the groove, and the pull wire extends from the distal end to the proximal end along the outer wall of the end cap to form a trigger segment configured to release the ligation ring from the distal end of the end cap.

[0012] In combination with the first aspect, the present disclosure provides a first possible implementation of the first aspect, wherein the end cap is connected with an elastic cap at a proximal end, and the elastic cap is configured to detachably cover the lens end of the endoscope.

[0013] In combination with the first possible implementation of the first aspect, the present disclosure provides a second possible implementation of the first aspect, wherein the 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.

[0014] In combination with the first aspect, the present disclosure provides a third possible implementation of the first aspect, wherein the end cap is connected with a flexible tube at a proximal end, and the pull wire in the inner cavity of the end cap is led out to the handle end through the flexible tube.

[0015] In combination with the first aspect, the present disclosure provides a fourth possible implementation of the first aspect, wherein the inner wall of the end cap is provided with a convex ring part matched with the endoscope.

[0016] In combination with the first aspect, the present disclosure provides a fifth possible implementation of the first aspect, wherein a plurality of ligation loops are provided, and the plurality of ligation loops are sequentially covered on the end cap along the axial direction.

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

[0018] In combination with the fifth possible implementation of the first aspect, the present disclosure provides a sixth possible implementation of the first aspect, wherein the trigger section extends around the end cap to form a transition section between any two adjacent ligation loops.

[0019] In combination with the first aspect, the present disclosure provides a seventh possible implementation of the first aspect, wherein the pull wire is provided with a plurality of pull wires, and each of the plurality of pull wires forms a trigger section; 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 seventh possible implementation of the first aspect, the present disclosure provides an eighth possible implementation of the first aspect, wherein the plurality of pull wires extend to the proximal end through the wire inlet and are connected to the main wire.

[0021] In the second aspect, the present disclosure provides a preloaded ligation device, which comprises: a ligation release handle and the continuous ligation mechanism as described in the first aspect.

[0022] The ligation release handle is detachably connected to the endoscope, and the proximal end of the pull wire is connected to the ligation release handle.

[0023] The embodiments of the present disclosure bring the following beneficial effects: the snare is sleeved on the end cap, the inner wall of the end cap is provided with a groove, the pull wire extends to the distal end of the inner cavity of the end cap through the groove, the side wall of the end cap is provided with a wire inlet, the wire inlet is communicated with the groove, the pull wire extends to the distal end of the inner cavity of the end cap through the wire inlet and the groove, and the pull wire extends from the distal end to the proximal end along the outer wall of the end cap to form a trigger section configured to release the snare from the distal end of the end cap. The pull wire can extend along the flexible tube, is nearly parallel to the endoscope, the end cap can be connected to the distal end of the endoscope, the continuous snaring mechanism is pre-installed, the installation error during the operation is avoided, the operation time is shortened, the endoscope channel is not occupied, the field of view of the endoscope is larger, and the operation is more convenient.

[0024] 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

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art of the present disclosure, the following will briefly introduce the drawings needed to be used in the specific embodiments or the related art description. 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.

[0026] Fig. 1 is a schematic view of a continuous snaring mechanism provided by an embodiment of the present disclosure;

[0027] Fig. 2 is a schematic view of a pre-installed snare and a scope provided by an embodiment of the present disclosure;

[0028] Fig. 3 is a schematic view of an end cap of a continuous snaring mechanism provided by an embodiment of the present disclosure;

[0029] Fig. 4 is a schematic view of an elastic cap of a continuous snaring mechanism provided by an embodiment of the present disclosure;

[0030] Fig. 5 is a schematic view of a pre-installed snare provided by an embodiment of the present disclosure;

[0031] Fig. 6 is a schematic view of an end cap of a continuous snaring mechanism provided by an embodiment of the present disclosure.

[0032] Fig. 1 is a schematic view of a continuous snaring mechanism provided by an embodiment of the present disclosure; DETAILED DESCRIPTION

[0033] 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 of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0034] 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 describing the name difference, 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.

[0035] 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 outside the body and available for hand holding is the proximal end, and the end implanted in the patient's body and away from the operator is the distal end. For those of ordinary skill in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0036] As shown in FIG. 1, FIG. 2 and FIG. 6, the continuous ligation mechanism provided by the embodiments of the present disclosure comprises: an end cap 001, a pull wire 002 and a ligation ring 003; the ligation ring 003 is sleeved on the end cap 001; the inner wall of the 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 end cap 001 through the groove 101; the side wall of the end cap 001 is provided with a wire inlet 102, and the wire inlet 102 is in communication with the groove 101; the pull wire 002 extends to the distal end of the inner cavity of the end cap 001 through the wire inlet 102 and the groove 101, and the pull wire 002 extends from the distal end to the proximal end along the outer wall of the end cap 001 to form a trigger segment 210 configured to release the ligation ring 003 from the distal end of the end cap 001.

[0037] The pull wire 002 extends distally through the groove 101, which can reduce the occlusion of the pull wire 002 to the inner cavity of the end cap 001, thereby avoiding the pull wire from blocking the line of sight of the endoscope 011. In addition, when the lens end of the endoscope 011 is inserted into the 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 end cap 001 and the endoscope 011, and thereby ensuring that the pull wire 002 can be pulled smoothly.

[0038] In addition, the side wall of the 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 end cap 001 through the wire inlet 102 and the groove 101, and the distal end of the flexible tube 005 can be connected in 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 end cap 001 through the groove 101, and then reverses along the outer wall of the end cap 001 to form a trigger section 210.

[0039] Further, the loop ligature 003 is provided with a plurality of loop ligatures 003 which are sequentially sleeved on the end cap 001 in the axial direction; the trigger section 210 is compressed on the inner side of the plurality of loop ligatures 003, and the trigger section 210 is provided with a plurality of protruding portions 211 which are arranged at intervals along the trigger section 210, so that each loop ligature 003 has a protruding portion 211 on the proximal side.

[0040] When the proximal end of the pull wire 002 is pulled, the pull wire 002 located on the inner side of the end cap 001 slides proximally, thereby causing the trigger section 210 to slide distally along the outer wall of the end cap 001, and the protruding portion 211 can push the loop ligature 003 off the end cap 001 to achieve release and loop ligature. With the pulling of the pull wire 002, the plurality of loop ligatures 003 can be successively pushed off by the protruding portion 211, thereby achieving continuous release.

[0041] In the embodiment, the trigger section 210 can form the protruding portion 211 in the form of a knot, and the protruding portion 211 can also be fixedly connected to the trigger section 210 in the form of a ball. When the plurality of loop ligatures 003 are closely arranged and sleeved on the end cap 001 in the axial direction, the protruding portion 211 located between any two adjacent loop ligatures 003 can be almost shielded by the elastically deformed loop ligature 003, thereby avoiding the protruding portion 211 from being exposed to cause injury to human tissue.

[0042] As shown in FIGS. 1 and 2, in the embodiment of the present disclosure, the end cap 001 is connected with an elastic cap 004 at the proximal end, and the elastic cap 004 is configured to be detachably sleeved on the lens end of the endoscope 011.

[0043] The elastic cap 004 can be deformed radially to tightly fit the lens end of the endoscope 011. In addition, the elastic cap 004 can be deformed and bent to bend the end cap 001 relative to the endoscope 011 to a small extent, thereby facilitating insertion into a narrow area.

[0044] As shown in FIGS. 2, 3 and 4, the 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 adapted to the first axial limiting portion 103.

[0045] The first axial limiting portion 103 and the second axial limiting portion 401 can be configured as a protrusion and a groove adapted thereto, respectively. The cooperation between the first axial limiting portion 103 and the second axial limiting portion 401 can axially fix the elastic cap 004 relative to the end cap 001. In addition, the connection between the first axial limiting portion 103 and the second axial limiting portion 401 can be reinforced by adhesion.

[0046] As shown in FIGS. 1, 2 and 5, the end cap 001 is connected with a flexible tube 005 at the proximal end, and the pull wire 002 in the lumen of the end cap 001 is led out to the handle end through the flexible tube 005.

[0047] On the one hand, the flexible tube 005 can accommodate the pull wire 002 inside, which not only does not occupy the endoscopic channel, but also avoids damage to human tissues caused by the exposure of the pull wire 002. On the other hand, the flexible tube 005 is supported between the end cap 001 and the ligation release handle, the pull wire 002 is pulled by the ligation release handle, and the position of the end cap 001 is ensured to be stable by the support of the flexible tube 005, thereby making the operation more convenient.

[0048] In an optional embodiment, the lens segment of the endoscope 011 can be inserted into the elastic cap 004. 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 relatively small.

[0049] In the present embodiment, the inner wall of the end cap 001 is provided with a protruding ring portion 104 adapted to the endoscope 011. The lens end of the endoscope 011 can be inserted into the end cap 001 and abut against the protruding ring portion 104, thereby achieving the forward movement of the lens end of the endoscope 011 and facilitating the expansion of the field of view. In the case where the end cap is made of transparent material, the number of ligation loops 003 in the field of view of the forwardly moved endoscope 011 is reduced, thereby obtaining a wider field of view.

[0050] As shown in FIG. 1, the trigger segment 210 extends around the end cap 001 to form a transition segment 212 between any two adjacent ligation loops 003.

[0051] Since the single pulling of the pull wire 002 cannot be too small, otherwise it is difficult to accurately release a single set of ligation ring 003, and it is extremely likely that multiple ligation rings 003 will be released due to excessive pulling of the pull wire 002. A transition section 212 is formed between any two adjacent ligation rings 003, the transition section 212 extends around the end cap 001, and the corresponding central angle of the transition section 212 can be configured to be 90-180 degrees. After the release of the previous ligation ring 003, the length of the transition section 212 needs to be pulled to release the next ligation ring 003, which reduces the accuracy requirement of the pull wire 002 operation and reduces the risk of misoperation.

[0052] In addition, the pull wire 002 is provided with multiple pull wires, each of which forms a trigger section 210. Any two adjacent ligation rings 003 have multiple protrusions 211 arranged along the circumference of the ligation ring 003. Multiple trigger sections 210 can be simultaneously configured in the same ligation ring 003, which can ensure that the ligation ring 003 can be smoothly released and can avoid the ligation ring 003 from being skewed during the release process.

[0053] Further, the multiple pull wires 002 extend proximally through the wire inlet 102 and are connected to the main wire 201. In a more preferred embodiment, two pull wires 002 can be configured at the distal end. The two pull wires 002 extend distally through the groove 101 on the inner wall of the end cap 001 and are bent proximally along the outer wall of the end cap 001, respectively. The protrusions 211 simultaneously apply a distally directed force at a position about 180 degrees apart in the circumference of the ligation ring 003, thereby achieving the release action of one ligation ring 003. To ensure the synchronization of the two pull wires 002, the two pull wires 002 can be connected to the main wire 201, which extends along the flexible tube 005 and is connected to the ligation release handle.

[0054] As shown in FIGS. 1, 2 and 5, the preloaded ligation device provided by the embodiment of the present disclosure comprises: a ligation release handle and the continuous ligation mechanism described in the above embodiments; the ligation release handle is detachably connected to the proximal end 111 of the body of the endoscope 011, and the proximal end of the pull wire 002 is connected to the ligation release handle.

[0055] In the embodiments of the present disclosure, the ligation release handle 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 plurality of clamping positions which are arranged at intervals along the circumference of the winding wheel shaft 007; the locking piece 008 is mounted on the handle support 006, and the locking piece 008 is detachably fitted in the clamping position. The proximal end of the pull wire 002 can be connected and wound on the winding wheel shaft 007, and rotating 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 position in the form of thread, buckle, etc. When the locking piece 008 is fitted in any clamping position, the winding wheel shaft 007 is locked relative to the handle support 006, thereby realizing the locking of the winding wheel shaft 007, and under the condition that the pull wire 002 is configured to drive the ligation ring 003 to release, the locking of the winding wheel shaft 007 avoids the ligation ring 003 from being released by mistake.

[0056] Further, the handle support 006 is connected with a handle base 010 which is detachably connected with the endoscope 011. The handle base 010 can be detachably connected with the endoscope 011 in the form of hook, elastic clamp or bandage, etc., thereby realizing the combined use of the ligation release handle and the endoscope 011.

[0057] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; 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 recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure. Industrial applicability

[0058] In summary, the embodiments of the present disclosure provide a continuous ligation mechanism and a pre-installed ligation device, which can be pre-installed, can avoid errors in installation during surgery, shorten the operation time, and do not need to occupy the endoscopic forceps channel, so that the endoscopic field of view is larger and the operation is more convenient.

Claims

1. A continuous bandaging mechanism, characterized in that, include: End cap (001), pull cord (002), and sling (003); The sling (003) is fitted onto the end cap (001); The inner wall of the 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 end cap (001); The end cap (001) has a wire inlet (102) on its side wall, and the wire inlet (102) communicates with the groove (101); The pull wire (002) extends through the inlet (102) and the groove (101) to the distal end of the inner cavity of the end cap (001), and the pull wire (002) extends from the distal end along the outer wall of the end cap (001) toward the proximal end to form a trigger segment (210) configured to release the ligature (003) from the distal end of the end cap (001).

2. The continuous bandaging mechanism according to claim 1, characterized in that, The 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).

3. The continuous bandaging mechanism according to claim 2, characterized in that, The 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) adapted to the first axial limiting part (103).

4. The continuous bandaging mechanism according to any one of claims 1-3, characterized in that, The end cap (001) is connected to a flexible tube (005) at its proximal end, and the pull wire (002) inside the end cap (001) is led out to the handle end through the flexible tube (005).

5. The continuous bandaging mechanism according to any one of claims 1-4, characterized in that, The inner wall of the end cap (001) is provided with a convex ring (104) adapted to the endoscope (011).

6. The continuous bandaging mechanism according to any one of claims 1-5, characterized in that, The ligature rings (003) are provided in multiple ways, and the multiple ligature rings (003) are sequentially sleeved on the end caps (001) along the axial direction; 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.

7. The continuous bandaging mechanism according to claim 6, characterized in that, The trigger segment (210) extends around the end cap (001) between any two adjacent loops (003) to form a transition segment (212).

8. The continuous bandaging mechanism according to any one of claims 1-7, characterized in that, The pull wire (002) has multiple wires, which respectively form the trigger segment (210); Each pair of adjacent ligatures (003) has a plurality of protrusions (211) spaced apart circumferentially from each ligature (003).

9. The continuous bandaging mechanism according to claim 8, characterized in that, Multiple pull wires (002) extend proximally through the inlet (102) and connect to the main line (201).

10. A pre-installed ligation device, characterized in that, include: The ligation release handle and the continuous ligation mechanism according to any one of claims 1-9; The ligation release handle is detachably connected to the endoscope (011), and the proximal end of the pull wire (002) is connected to the ligation release handle.

Images