Ligation device for endoscope

Abstract

The utility model relates to a ligation device for an endoscope, which comprises an outer tube, an inner tube capable of axially sliding in the outer tube is arranged in the outer tube, a first line tube and a second line tube are arranged in the inner tube, the front portions of the first line tube and the second line tube protrude out of the inner tube, and a traction line with a line holding ring at the front portion is installed in the first line tube. A ligature is installed in the second line pipe, and the front portion of the inner pipe extends out of the outer pipe and is sleeved with a rubber ring which can be separated from the inner pipe by pushing the outer pipe or the inner pipe. The ligation device for the endoscope is favorable for ligation of the root of a polyp under the endoscope, so that the polyp can be better cut.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of ligation devices for endoscope. BACKGROUND

[0002] Endoscopic technology plays an important role in the diagnosis and treatment of gastrointestinal diseases, especially in polyp resection, hemostasis and tissue ligation surgery. With the continuous development of endoscopic technology, minimally invasive surgery under endoscope has become the preferred method for treating gastrointestinal polyps, early tumors and bleeding lesions. However, the existing endoscopic surgical instruments still have limitations in some complex situations, especially when dealing with larger polyps or tissues that need precise ligation, the operation difficulty of polyp resection is large, the operation time is long, which reduces the success rate of surgery, and there is a certain probability of postoperative complications. SUMMARY

[0003] The utility model aims to provide a kind of ligation devices for endoscope, which helps to ligate the root of polyp under endoscope, so as to better perform polyp cutting operation.

[0004] The technical scheme of the utility model is as follows: a kind of ligation devices for endoscope, including outer tube, the inner tube that can slide in its inner along axial direction is provided in the outer tube, the first wire tube and the second wire tube that protrude the inner tube in the inner tube are provided, the traction wire with wire holding circle in the front part is installed in the first wire tube, the ligation wire is installed in the second wire tube, the front part of the inner tube protrudes the outer tube and is sleeved with rubber ring that can be separated from the inner tube by pushing the outer tube or the inner tube.

[0005] Further, the rear end of the outer tube is provided with a first holding flange.

[0006] Further, the rear end of the inner tube protrudes the rear end of the outer tube and is provided with a second holding flange.

[0007] Further, a node is provided on the ligation wire at a distance of 30-50mm from the front end.

[0008] Further, the outer tube, the inner tube, the first wire tube and the second wire tube are made of PVC material or metal material.

[0009] Further, the first wire tube protrudes the front end of the inner tube and has an arc-shaped part with outlet bending towards the second wire tube.

[0010] Further, the traction wire is made of flexible material with wire holding circle.

[0011] Further, the ligation wire is made of flexible material.

[0012] Further, the outer diameter of the outer tube is smaller than the inner diameter of the endoscopic biopsy channel, and the outer diameter of the inner tube is smaller than the inner diameter of the outer tube.

[0013] Further, the outer diameter of the first and second line pipes is less than half of the inner diameter of the inner pipe.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The endoscope ligation device has compact structure, and through the combination design of the outer pipe, the inner pipe, the traction line, the ligation line and the rubber ring, it is helpful to quickly and firmly ligate the root of polyp or other tissues under the endoscope, so as to better cut the polyp from the root.

[0016] 2. The endoscope ligation device has the advantages of compact structure, simple operation and good ligation effect, and can effectively improve the success rate and safety of the polyp resection operation under the endoscope, thereby reducing the risk of complications such as postoperative massive hemorrhage or residual lesions.

[0017] 3. Through the endoscope ligation device, the doctor can more easily complete the complex ligation operation under the endoscope, reduce the operation time and operation difficulty, and provide a safer and more efficient treatment plan for the patient.

[0018] 4. By providing the holding flange at the rear end of the inner pipe and the outer pipe, the outer pipe is pushed to make the rubber tube separate from the inner pipe and be sleeved on the two ends of the ligation line forming a loop; by providing the arc-shaped part at the front end of the first line pipe, it is helpful to make the ligation line pass through the wire holding circle after the wire holding circle passes out of the first line pipe, so that the ligation line passes through the wire holding circle. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the utility model;

[0020] Figure 2 It is a state schematic view of the rubber ring of the utility model after being pushed out and tied on the ligation line;

[0021] Figure 3 It is a structure schematic view of the utility model; Figure 1 of the A area enlarged view;

[0022] Figure 4 It is a structure schematic view of the utility model; Figure 2 of the B area enlarged view;

[0023] Figure 5 It is a structure schematic view of the arc-shaped part of the first line pipe of the utility model;

[0024] Fig. 1: 1-polyposis 10-outer tube 11-first holding flange 20-inner tube 21-second holding flange 30-first wire tube 31-arc-shaped part 32-center line of arc-shaped part port 33-axis center line 34-angle 40-second wire tube 50-pulling wire 51-wire holding circle 60-ligature 61-knot 70-rubber ring. DETAILED DESCRIPTION

[0025] In order to make the above features and advantages of the present application more apparent, the following embodiments are described in detail below, with reference to the accompanying drawings.

[0026] REFERENCE Figures 1 to 5

[0027] A ligation device for endoscope, comprising an outer tube 10, an inner tube 20 slidably arranged in the outer tube, a first wire tube 30 and a second wire tube 40 protruding from the inner tube by about 1-3mm, a pulling wire 50 with a wire holding circle 51 arranged in the first wire tube, a ligature 60 arranged in the second wire tube, and a rubber ring 70 arranged on the front part of the inner tube and detachable from the inner tube by pushing the outer tube or the inner tube.

[0028] In the embodiment, the wire holding circle is flat and has a space through which the ligature can pass, which facilitates the wire holding circle to pass through the first wire tube and to bypass the root of the polyposis.

[0029] In the embodiment, the rear end of the outer tube is provided with a first holding flange 11, and the rear end of the inner tube protrudes from the rear end of the outer tube and is provided with a second holding flange 21. By holding the second holding flange at the rear end of the inner tube, the outer tube is pushed forward by the first holding flange, the rubber ring arranged on the front part of the inner tube is pushed forward by the front end of the outer tube, so as to be detached from the inner tube and be tied on the two ends of the ligature.

[0030] In the embodiment, the ligature is provided with a knot 61 at a position 30-50mm away from the front end, and the knot has a diameter smaller than that of the ligature, which facilitates the ligature to be broken at the knot by applying a certain pulling force.

[0031] In the embodiment, the outer tube, the inner tube, the first wire tube and the second wire tube are made of PVC material or other medical materials or metal materials.

[0032] In the embodiment, the outer diameter of the outer tube should be slightly smaller than the inner diameter of the biopsy channel of the endoscope, so as to ensure smooth passing. Generally, the outer diameter of the outer tube can be designed to be between 2.8mm and 3.0mm, which can ensure sufficient space for sliding operation and avoid too tight to cause passing difficulty.

[0033] In this embodiment, the outer diameter of the inner tube should be smaller than the inner diameter of the outer tube, so as to accommodate the first and second wire tubes in the inner tube. The outer diameter of the inner tube can be designed between 1.5mm and 2.0mm, depending on the size of the first and second wire tubes.

[0034] In this embodiment, the outer diameter of the first and second wire tubes should be further smaller than the inner diameter of the inner tube, so as to be fixed and slid in the inner tube. Generally, the outer diameter of these wire tubes can be designed between 0.5mm and 1.0mm.

[0035] In this embodiment, in order to make the wire holding circle of the traction wire better form an arc and bend towards the direction of the second wire tube when the wire holding circle outputs the first wire tube, the first wire tube has an arc-shaped portion 31 at the front end thereof, which protrudes out of the inner tube and has an outlet bent towards the direction of the second wire tube. Specifically, the arc-shaped portion has an included angle 34 between the center line 32 of the arc-shaped portion port and the axis 33 of the first wire tube, and the outlet of the arc-shaped portion is bent towards the direction of the second wire tube, so as to make the wire holding circle better go around the root of the polyp and facilitate the ligation wire to pass through the wire holding circle.

[0036] In another embodiment, the front part (including the wire holding circle) of the traction wire can be pre-bent, so as to automatically bend when the wire holding circle protrudes forward, and facilitate the wire holding circle to better go around the root of the polyp.

[0037] In this embodiment, the traction wire is a flexible material, such as a soft steel wire.

[0038] In this embodiment, the ligation wire is a flexible material, such as a fiber wire or a nylon wire, or a 2-0 medical suture.

[0039] In this embodiment, the diameters of the traction wire and the ligation wire should be small enough to smoothly slide in the first and second wire tubes. Generally, the diameters of the traction wire and the ligation wire can be designed between 0.2mm and 0.5mm.

[0040] Use method: the outer tube and the inner tube are passed through the endoscope tube together, the traction line is passed out of the first line tube, the direction of the traction line is adjusted, the line holding circle of the traction line is wound around the root of the polyp, when the line holding circle of the traction line is wound around the root of the polyp, the ligature is pushed out of the second line tube, and the ligature is controlled to pass through the line holding circle, and then the ligature is pushed outwards, and the traction line is collected backwards.When the line holding circle of the traction line brings the ligature into the first line tube and is clamped at the front end of the first line tube, the ligature is collected. By holding the second holding protrusion at the rear end of the inner tube, the outer tube is pushed forward through the first holding flange, so that the front end of the outer tube pushes the rubber ring at the front part of the inner tube forward, so that it is separated from the inner sleeve, and is tied on the two end parts of the ligature. Finally, the ligature is pulled back, so that the ligature is broken at the node, so that the ligation of the root of the large polyp is realized.

[0041] The above-mentioned "first", "second" and the like are used to limit the parts in the utility model, and those skilled in the art should know that "first", "second" are only used for distinguishing the parts for description, and the above-mentioned words do not have special meanings unless otherwise stated.

[0042] If the utility model discloses or involves mutually fixed and connected parts or structural members, unless otherwise stated, the fixed connection can be understood as: detachable fixed connection (for example, bolt or screw connection), and can also be understood as: non-detachable fixed connection (for example, riveting, welding), of course, the mutually fixed connection can also be replaced by an integral structure (for example, integrally formed by using casting process) (except that integral forming process is obviously unavailable).

[0043] In addition, the terms used to represent the position relationship or shape in any of the above-mentioned utility model disclosed technical solutions include the approximate, similar or close state or shape unless otherwise stated.

[0044] Any part provided by the utility model can be assembled by a plurality of individual components, or can be an individual component manufactured by an integral forming process.

[0045] The above-mentioned is only a preferred embodiment of the utility model, and any change and modification made within the scope of the utility model application patent shall belong to the scope of the utility model.

Claims

1. An endoscope ligation device comprising an outer tube, characterized by, The outer tube is provided with an inner tube which can slide axially in the outer tube, the inner tube is provided with a first wire tube and a second wire tube which protrude from the front of the inner tube, the first wire tube is provided with a traction wire with a wire holding circle at the front, the second wire tube is provided with a ligature, the front of the inner tube protrudes from the outer tube and is provided with a rubber ring which can be separated from the inner tube by pushing the outer tube or the inner tube.

2. The endoscope ligating apparatus according to claim 1, wherein The rear end of the outer tube is provided with a first holding flange.

3. The endoscope ligating device according to claim 1, wherein The rear end of the inner tube protrudes from the rear end of the outer tube and is provided with a second holding flange.

4. The endoscope ligating apparatus according to claim 1, 2 or 3, characterized by The ligature is provided with a node at a distance of 30-50mm from the front end.

5. The endoscope ligating device according to claim 1, wherein The outer tube, the inner tube, the first wire tube and the second wire tube are made of PVC material or metal material.

6. The endoscope ligating device according to claim 1, wherein The first wire tube protruding from the front end of the inner tube has an arc-shaped part with an outlet bending towards the direction of the second wire tube.

7. The endoscope ligating device according to claim 1, wherein The traction wire is made of flexible material.

8. The endoscope ligating device according to claim 1, wherein The ligature is made of flexible material.

9. The endoscope ligating device according to claim 1, wherein The outer diameter of the outer tube is smaller than the inner diameter of the endoscope biopsy channel, and the outer diameter of the inner tube is smaller than the inner diameter of the outer tube.

10. The endoscope ligating apparatus according to claim 1 or 9, wherein The outer diameters of the first wire tube and the second wire tube are both smaller than half of the inner diameter of the inner tube.

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