Continuous loop ligature mechanism and preassembled loop ligature device

Abstract

The utility model provides a continuous loop ligature mechanism and a preassembled loop ligature device, and relates to the technical field of medical instruments, the continuous loop ligature mechanism provided by the utility model comprises an end cap, a pull wire and a loop ligature ring; the loop ligature ring sleeves the end cap, a groove is formed in the inner wall of the end cap, and the pull wire extends to the far end of an inner cavity of the end cap through the groove; the side wall of the end cap is provided with a wire inlet which is communicated with the groove. The pull wire extends to the far end of the inner cavity of the end cap through the wire inlet and the groove, and the pull wire extends from the far end to the near end along the outer wall of the end cap to form a trigger section used for releasing the loop ligature ring from the far end of the end cap. The pull wire can extend along the flexible pipe fitting and is almost parallel to the endoscope, the end cap is connected to the far end of the endoscope, the continuous loop ligature mechanism can be installed in advance, installation errors in an operation are avoided, the operation time of the operation is shortened, an endoscope clamp channel does not need to be occupied, the view field range of the endoscope is larger, and the operation is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a continuous ligation mechanism and a pre-installed ligation device. Background Art

[0002] Traditional ligation devices need to be assembled before surgery, which not only takes a lot of time, but also the surgeon is prone to make installation errors under tight medical conditions, which may cause instrument failure or even medical accidents. Moreover, the ligation device can usually only carry a single ligation ring. When multiple ligations are required, multiple insertion and release operations of the ligation ring are usually required, which increases the surgeon's operating burden and leads to low surgical efficiency. In addition, when a pull wire is used to drive the ligation ring to be released, the pull wire and the ligation ring are prone to relative sliding, which poses a risk of failure to release the ligation ring. When the ligation device is inserted and released, it usually takes up space in the endoscope's clamp channel, which makes it difficult for other surgical instruments to be freely inserted into the endoscope's clamp channel. In addition, the ligation device limits the field of view of the endoscope, affecting the surgeon's observation of the surgical site. Utility Model Content

[0003] The utility model aims to provide a continuous ligation mechanism and a pre-installed ligation device, so as to alleviate the technical problem that the ligation mechanism occupies the space of the endoscope forceps channel and limits the visual field of the endoscope.

[0004] In a first aspect, the continuous ligation mechanism provided by the utility model comprises: an end cap, a pull wire and a ligation ring;

[0005] The ligation loop is set on the end cap;

[0006] The inner wall of the end cap is provided with a groove, and the pull wire extends through the groove to the far end of the inner cavity of the end cap;

[0007] The side wall of the end cap is provided with a wire inlet, which is communicated with the groove;

[0008] The pull wire extends to the distal end of the inner cavity of the end cap through the wire inlet and the groove, and extends from the distal end to the proximal end along the outer wall of the end cap to form a trigger section for releasing the ligation ring from the distal end of the end cap.

[0009] In combination with the first aspect, the utility model provides a first possible implementation manner of the first aspect, wherein an elastic cap is connected to the proximal end of the end cap, and the elastic cap is used for detachably covering the lens end of the endoscope.

[0010] In combination with the first possible implementation of the first aspect, the utility model provides a second possible implementation of the first aspect, wherein the end cap is provided with a first axial limiting portion, and the elastic cap is provided with a second axial limiting portion adapted to the first axial limiting portion.

[0011] In combination with the first aspect, the utility model provides a third possible implementation of the first aspect, wherein a flexible tube is connected to the proximal end of the end cap, and the pull wire in the inner cavity of the end cap is led out to the handle end through the flexible tube.

[0012] In combination with the first aspect, the utility model provides a fourth possible implementation of the first aspect, wherein the inner wall of the end cap is provided with a convex ring portion adapted to the endoscope.

[0013] In combination with the first aspect, the utility model provides a fifth possible implementation of the first aspect, wherein a plurality of ligating rings are provided, and the plurality of ligating rings are sequentially sleeved on the end cap along the axial direction;

[0014] The trigger section is pressed tightly against the inner sides of the plurality of ligature loops, and the trigger section is provided with a plurality of protrusions which are arranged at intervals along the trigger section so that the proximal side of each ligature loop has a protrusion.

[0015] In combination with the fifth possible implementation of the first aspect, the utility model provides a sixth possible implementation of the first aspect, wherein the trigger segment extends around the end cap between any two adjacent ligature rings to form a transition segment.

[0016] In combination with the fifth possible implementation of the first aspect, the utility model provides a seventh possible implementation of the first aspect, wherein a plurality of pull wires are provided and each of them forms a trigger segment; and a plurality of protrusions are provided between any two adjacent ligature circles and are spaced apart along the circumference of the ligature circle.

[0017] In combination with the seventh possible implementation manner of the first aspect, the utility model provides an eighth possible implementation manner of the first aspect, wherein a plurality of pull wires extend toward the proximal end through the wire inlet and are connected to the main line.

[0018] In a second aspect, the pre-installed ligation device provided by the utility model comprises: a ligation release handle and the continuous ligation mechanism described in the first aspect;

[0019] 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.

[0020] The embodiments of the utility model bring the following beneficial effects: a ligation loop is sleeved on the end cap, 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; the side wall of the end cap is provided with a wire inlet, and the wire inlet is connected 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 along the outer wall of the end cap to the proximal end to form a trigger section for releasing the ligation loop from the distal end of the end cap. The pull wire can extend along the flexible pipe and be nearly parallel to the endoscope, the end cap can be connected to the distal end of the endoscope, and the continuous ligation mechanism is pre-installed to avoid installation errors during surgery, shorten the surgical operation time, and do not need to occupy the endoscope forceps channel, the endoscope has a larger field of view, and is more convenient for surgical operations.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the related technologies, the drawings required for use in the specific implementation methods or the related technical descriptions will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of a continuous ligation mechanism provided in an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of a pre-installed ligation device and a speculum provided in an embodiment of the utility model;

[0025] Figure 3 Schematic diagram of the end cap of the continuous ligation mechanism provided in the embodiment of the utility model Figure 1 ;

[0026] Figure 4 A schematic diagram of an elastic cap of a continuous ligation mechanism provided by an embodiment of the utility model;

[0027] Figure 5 A schematic diagram of a pre-installed ligation device provided in an embodiment of the utility model;

[0028] Figure 6 Schematic diagram of the end cap of the continuous ligation mechanism provided in the embodiment of the utility model Figure 2 .

[0029] Icons: 001 - end cap; 101 - groove; 102 - wire inlet; 103 - first axial limiter; 104 - convex ring; 002 - pull wire; 201 - main line; 210 - trigger section; 211 - raised section; 212 - transition section; 003 - ligature ring; 004 - elastic cap; 401 - second axial limiter; 005 - flexible pipe; 006 - handle bracket; 007 - winding wheel shaft; 008 - locking piece; 010 - handle base; 011 - endoscope; 111 - proximal end of the scope body. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used to describe the difference in names, and cannot be understood as indicating or implying relative importance. The physical quantities in the formula, if not separately marked, should be understood as basic quantities of the basic units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0032] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. The "proximal end" and "distal end" in the text are based on the product operator. The end located outside the body and can be held by hand is the proximal end, and the end that can be implanted in the patient's body and away from the operator is the distal end. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] like Figure 1 , Figure 2 and Figure 6 As shown, the continuous ligation mechanism provided by the embodiment of the utility model includes: 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 connected 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 along the outer wall of the end cap 001 to the proximal end to form a trigger section 210 for releasing the ligation ring 003 from the distal end of the end cap 001.

[0034] The pull wire 002 extends to the distal end through the groove 101, which can reduce the shielding of the inner cavity of the end cap 001 by the pull wire 002, thereby preventing 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 by the groove 101, thereby preventing the pull wire 002 from being pressed between the inner wall of the end cap 001 and the endoscope 011, thereby ensuring that the pull wire 002 can be pulled smoothly.

[0035] In addition, a wire inlet 102 is provided on the side wall of the end cap 001, and the wire inlet 102 is connected to 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 to the wire inlet 102, and 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 turns back to the proximal end along the outer wall of the end cap 001 to form a trigger section 210.

[0036] Furthermore, a plurality of ligature rings 003 are provided, and the plurality of ligature rings 003 are sequentially sleeved on the end cap 001 along the axial direction; the trigger segment 210 is pressed against the inner side of the plurality of ligature rings 003, and the trigger segment 210 is provided with a plurality of protrusions 211, and the plurality of protrusions 211 are arranged at intervals along the trigger segment 210, so that the proximal side of each ligature ring 003 has a protrusion 211.

[0037] When the proximal end of the pull wire 002 is pulled, the pull wire 002 located inside the end cap 001 slides toward the proximal end, thereby causing the trigger section 210 to slide toward the distal end along the outer wall of the end cap 001, and the ligation ring 003 can be pushed off the end cap 001 by the protrusion 211 to achieve release and ligation. As the pull wire 002 is pulled, multiple ligation rings 003 can be pushed off one by one by the protrusion 211, thereby achieving continuous release.

[0038] In this embodiment, the trigger section 210 can be knotted to form the protrusion 211, or a ball can be fixedly connected to the trigger section 210 as the protrusion 211. When a plurality of ligature rings 003 are closely arranged along the axial direction and sleeved on the end cap 001, the protrusion 211 between any two adjacent ligature rings 003 can be almost covered by the elastically deformed ligature rings 003, thereby preventing the protrusion 211 from being exposed and causing scratches on human tissue.

[0039] like Figure 1 and Figure 2 As shown, in the embodiment of the utility model, the proximal end of the end cap 001 is connected to an elastic cap 004 , and the elastic cap 004 is used to detachably cover the lens end of the endoscope 011 .

[0040] The elastic cap 004 can be deformed radially to be tightly mounted on the lens end of the endoscope 011. In addition, the elastic cap 004 can be deformed and bent elastically to allow the end cap 001 to be slightly bent relative to the endoscope 011, thereby facilitating insertion into a narrow area.

[0041] like Figure 2 , Figure 3 and Figure 4 As shown, 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 matched with the first axial limiting portion 103 .

[0042] One of the first axial stopper 103 and the second axial stopper 401 can be configured as a protrusion, and the other can be configured as a groove adapted thereto, and the elastic cap 004 can be axially fixed relative to the end cap 001 by the cooperation between the first axial stopper 103 and the second axial stopper 401. In addition, the connection between the first axial stopper 103 and the second axial stopper 401 can be reinforced by bonding.

[0043] like Figure 1 , Figure 2 and Figure 5 As shown, the proximal end of the end cap 001 is connected to a flexible tube 005 , and the pull wire 002 in the inner cavity of the end cap 001 is led out to the handle end through the flexible tube 005 .

[0044] On the one hand, the flexible tube 005 can accommodate the pull wire 002 inside, which not only does not need to occupy the endoscope forceps channel, but also can prevent the pull wire 002 from being exposed and causing damage to human tissue; on the other hand, the flexible tube 005 is supported between the end cap 001 and the ligation release handle, and the ligation release handle pulls the pull wire 002, and the flexible tube 005 supports it to ensure that the end cap 001 is firmly in place, making the operation more convenient.

[0045] In an optional embodiment, the lens segment of the endoscope 011 may be inserted into the elastic cap 004. In this state, the distal end of the endoscope 011 is restricted by a plurality of ligature rings 003, and the field of view of the endoscope 011 is relatively small.

[0046] In this embodiment, the inner wall of the end cap 001 is provided with a convex ring portion 104 adapted to the endoscope 011, and the lens end of the endoscope 011 can be inserted into the 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 conducive to expanding the field of view. When the end cap is configured with a transparent material, the number of ligature rings 003 in the field of view of the endoscope 011 that moves forward is reduced, and a wider field of view is obtained.

[0047] like Figure 1 As shown, the trigger segment 210 extends around the end cap 001 between any two adjacent ligature loops 003 to form a transition segment 212 .

[0048] The single pulling force of the pulling wire 002 should not be too small, otherwise it is difficult to accurately release a single ligature ring 003, and it is very likely that multiple ligature rings 003 will fall off due to excessive pulling of the pulling wire 002. A transition section 212 is extended around the ligature ring 003 between any two adjacent ligature rings 003, and the transition section 212 extends around the end cap 001. The central angle of the transition section 212 can be configured to be 90 degrees to 180 degrees. After the current ligature ring 003 is released, it is necessary to pull the length beyond the transition section 212 to release the next ligature ring 003, which reduces the accuracy requirements for the control of the pulling wire 002 and reduces the risk of misoperation.

[0049] In addition, the pull wire 002 is provided with multiple trigger sections 210 respectively, and multiple protrusions 211 are arranged at intervals along the circumference of the ligature ring 003 between any two adjacent ligature rings 003. Multiple trigger sections 210 can be used for the same ligature ring 003 at the same time, which can not only ensure that the ligature ring 003 can be smoothly removed, but also avoid the ligature ring 003 from being deflected during the removal process.

[0050] Furthermore, multiple pull wires 002 extend toward the proximal end through the wire inlet 102 and are connected to the main wire 201. In a preferred embodiment, two pull wires 002 can be configured at the distal end, and the two pull wires 002 extend toward the distal end through the groove 101 on the inner wall of the end cap 001, and are respectively bent toward the proximal end along the outer wall of the end cap 001, and are respectively applied to the distal end through the protrusions 211 at positions about 180 degrees apart on the circumference of the ligature ring 003, thereby achieving the release action of a ligature ring 003. In order to ensure the synchronization of the actions of the two pull wires 002, the two pull wires 002 can be converged and connected to the main wire 201, and are extended from the main wire 201 along the flexible pipe 005 and connected to the ligature release handle.

[0051] like Figure 1 , Figure 2 and Figure 5 As shown, the pre-installed ligation device provided in the embodiment of the utility model includes: a ligation release handle and the continuous ligation mechanism described in the above embodiment; the ligation release handle is detachably connected to the proximal end 111 of the endoscope body 011, and the proximal end of the pull wire 002 is connected to the ligation release handle.

[0052] In the embodiment of the utility model, the ligature release handle comprises: a handle bracket 006, a winding wheel shaft 007 and a locking member 008; the winding wheel shaft 007 is rotatably connected to the handle bracket 006, and the winding wheel shaft 007 is provided with a plurality of positions, and the plurality of positions are arranged at intervals along the circumference of the winding wheel shaft 007; the locking member 008 is installed on the handle bracket 006, and the locking member 008 can be detachably matched with the position. The proximal end of the pull wire 002 can be connected and wound on the winding wheel shaft 007, and the pull wire 002 can be further wound on the winding wheel shaft 007 by rotating the winding wheel shaft 007, thereby achieving the tightening of the pull wire 002. The locking member 008 can be detachably connected to the locking position by means of threads, buckles, etc. When the locking member 008 is engaged in any locking position, the winding wheel shaft 007 is locked relative to the handle bracket 006, thereby locking the winding wheel shaft 007. When the pulling wire 002 is used to drive the ligation ring 003 to release, the ligation ring 003 can be prevented from being accidentally released by locking the winding wheel shaft 007.

[0053] Furthermore, the handle bracket 006 is connected to a handle base 010, and the handle base 010 is detachably connected to the endoscope 011. The handle base 010 can be detachably connected to the endoscope 011 by means of a hook, an elastic clip or a strap, so as to realize the combined use of the ligature release handle and the endoscope 011.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A continuous ligation mechanism, characterized in that: include: End cap (001), pull wire (002) and ligature 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 through the groove (101) to the distal end of the inner cavity of the end cap (001); 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 through the wire 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) to the proximal end to form a trigger section (210) for releasing the ligature ring (003) from the distal end of the end cap (001).

2. The continuous ligation mechanism according to claim 1, characterized in that: The proximal end of the end cap (001) is connected to an elastic cap (004), and the elastic cap (004) is used to detachably cover the distal end of the endoscope (011).

3. The continuous ligation mechanism according to claim 2, characterized in that: 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).

4. The continuous ligation mechanism according to claim 1, characterized in that: The proximal end of the end cap (001) is connected to a flexible tube (005), and the pull wire (002) in the inner cavity of the end cap (001) is led out to the handle end through the flexible tube (005).

5. The continuous ligation mechanism according to claim 1, characterized in that: The inner wall of the end cap (001) is provided with a convex ring portion (104) adapted to the endoscope (011).

6. The continuous ligation mechanism according to claim 1, characterized in that: The ligation ring (003) is provided in plurality, and the plurality of ligation rings (003) are sequentially sleeved on the end cap (001) along the axial direction; The trigger segment (210) is pressed against the inner side of the plurality of ligature loops (003), and the trigger segment (210) is provided with a plurality of protrusions (211), which are arranged at intervals along the trigger segment (210) so that the proximal side of each ligature loop (003) has the protrusion (211).

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

8. The continuous ligation mechanism according to claim 6, characterized in that: The pull wires (002) are provided in plurality and respectively form the trigger sections (210); Between any two adjacent ligature rings (003), there are a plurality of protrusions (211) spaced apart along the circumferential direction of the ligature rings (003).

9. The continuous ligation mechanism according to claim 8, characterized in that: The plurality of pull wires (002) extend toward the proximal end through the wire inlet (102) and are connected to the main wire (201).

10. A pre-installed ligation device, characterized in that: include: A ligation release handle and a continuous ligation mechanism according to any one of claims 1 to 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.

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