Electric snare with one-way buckle

Abstract

An electric snare with a one-way buckle comprises an operating handle, a connecting ferrule which is arranged at the front end of the operating handle and can be opened or tightened, and an operating mechanism which is arranged on the operating handle, connected with the connecting ferrule and used for controlling the connecting ferrule to be opened or tightened. The lantern ring is arranged at the front end of the operating handle and can form a ring, the inhaul cable is oppositely arranged on one side of the lantern ring and can be connected with the lantern ring, the connecting buckle is arranged at the front end of the inhaul cable and can be connected with the lantern ring, and the inhaul cable is made of a memory material or a stainless steel guide wire. The connecting buckle penetrates through a ring formed by the lantern ring, so that a cutting area for sleeving a polyp is formed between the lantern ring and the inhaul cable; by limiting the structure of the connecting ferrule, the inhaul cable made of the memory material or the stainless steel guide wire is matched with the lantern ring and the connecting buckle, so that the connecting ferrule can sleeve a polyp from the side face, and the method is different from the mode that a traditional snare sleeves the polyp downwards from the head end of a lesion and then tightens and cuts the polyp; the influence of the size of polyp lesion and the complexity of the lesion site on the cutting difficulty of the snare can be reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of polyp cutting devices, specifically relating to an electric ring with a one-way buckle. Background Technology

[0002] Colorectal polyps are raised lesions that protrude from the surface of the intestinal mucosa into the intestinal lumen. Before pathological diagnosis, they are generally referred to as polyps. The onset of this disease is insidious, and they are usually discovered during endoscopic examinations. Colorectal polyps can occur in various parts of the intestine, varying in shape, size, and number. Depending on the pathological type, a significant proportion of colorectal polyps are precancerous lesions. Studies have shown that most colorectal cancers develop from colorectal adenomatous polyps, and the development of adenomas typically follows the pathway of "adenoma—continued growth—cancer transformation—metastasis." Therefore, early detection and removal of colorectal polyps can significantly reduce the incidence of colorectal cancer.

[0003] Currently, common colorectal polyps (tumors) in clinical practice are mainly divided into pedunculated polyps and sessile polyps. For polyps with a diameter less than 0.5 cm, they can be removed with biopsy forceps, or treated with electrocoagulation or APC. For polyps with a diameter greater than 0.5 cm and a stalk, high-frequency electrocoagulation resection can be performed using a snare. If the polyp stalk is thick, due to the rich blood supply often present at the stalk, "prophylactic stalk ligation" with nylon rope or metal clips is necessary before electroresection using a snare. The traditional snare method involves looping the snare from the tip of the lesion downwards, tightening it afterward, and then performing electroresection. However, for some colorectal polyps with large heads and thick stalks, the larger the head, the more significant the influence of gravity, and the worse the field of vision, often making it difficult for the snare to accurately loop around the stalk or to be accidentally caught in the surrounding tissue. Especially when encountering complex locations, the snare becomes more difficult, often requiring repeated operations, which is time-consuming and can easily lead to polyp removal failure. It is highly dependent on the operator's skills and also greatly increases the risk of immediate and delayed bleeding and perforation during and after the operation. In addition, it can also easily lead to problems such as incomplete lesion removal and positive resection margins.

[0004] Chinese Patent No. CN213283319U discloses the following: This utility model discloses an electric snare for endoscopy, including a handle, a slider mounted on the handle, and a rotary joint; characterized in that the handle has an annular groove; the slider has a positioning hole; a positioning pin is installed in the positioning hole; the annular groove is installed corresponding to the positioning hole; a pull cable is installed on the slider; and a snare is installed on the pull cable; this utility model has a simple structure, is easy to use, can increase the positioning accuracy, and can easily snare foreign objects.

[0005] While the aforementioned patent improves the accuracy and efficiency of polyp retrieval by increasing the positioning precision of the snare, it still cannot adjust the orientation angle of the snare opening, resulting in low flexibility of use. It still cannot meet the needs of retrieval of polyps at different angles and locations, and there is also the problem of incomplete removal of lesions, which requires further improvement. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric coil holder with a one-way buckle.

[0007] The present invention adopts the following technical solution:

[0008] An electric coil catcher with a one-way buckle includes an operating handle, a connecting collar disposed at the front end of the operating handle that can be opened or tightened, and an operating mechanism disposed on the operating handle and connected to and controlling the opening or tightening of the connecting collar.

[0009] The connecting collar includes a collar that can form a loop at the front end of the operating handle, a cable that can be connected to the collar and is located on one side opposite to the collar, and a connecting buckle that can be connected to the collar at the front end of the cable. The cable is made of memory material or stainless steel wire. When the connecting collar is opened to its maximum, the connecting buckle passes through the loop formed by the collar, so that a resection area for locating the polyp is formed between the collar and the cable.

[0010] Furthermore, the connecting buckle includes a connecting post connected to the front end of the cable and a locking block disposed at the front end of the connecting post that can be connected to a collar. The locking block has a locking groove on the opposite surface of the front end of the collar for engaging with the collar.

[0011] Furthermore, the front end of the card block has an upwardly curved positioning part, and the card groove includes a guide section extending along one end of the card block in a direction close to the positioning part and an arc-shaped positioning groove provided in the positioning part and connected to the guide section. When the connecting collar is tightened, the collar first moves inward to tighten so that the front end of the collar moves from the guide section to the arc-shaped positioning groove and is locked, thereby realizing the connection between the collar and the cable.

[0012] Furthermore, the operating mechanism includes a first operating pull ring movably disposed on the operating handle, a second operating pull ring movably disposed on the operating handle at the front end of the first operating pull ring, a first connecting component disposed in the operating handle connecting the first operating pull ring and the collar, and a second connecting component disposed in the operating handle connecting the second operating pull ring and the cable.

[0013] Furthermore, the operating handle includes an operating handle body, an operating rod disposed at the front end of the operating handle body, and a connecting sleeve disposed at the lower end of the operating rod and connected to the operating handle body.

[0014] Furthermore, the first connecting component includes a first movable block movably disposed in the operating lever and connected to a collar, a first connecting rod disposed in the operating handle body and connected to a first operating pull ring, and a first connecting rope disposed between the first movable block and the first connecting rod. The second connecting component includes a second movable block movably disposed in the operating lever and connected to a cable, a second connecting rod disposed in the operating handle body and connected to a second operating pull ring, and a second connecting rope disposed between the second movable block and the second connecting rod.

[0015] Furthermore, the operating lever has two movable cavities extending along its length, and the first movable block and the second movable block are respectively movably disposed in the two movable cavities; each movable cavity includes a movable cavity body and two guide grooves extending outward on opposite sides of the movable cavity body, and the shapes of the first movable block and the second movable block are adapted to the shape of the movable cavity.

[0016] Furthermore, the first operating pull ring includes a first movable sleeve movably disposed on the operating handle and a first pull ring portion disposed outside the first movable sleeve, and the lower end of the first connecting rod extends into the first movable sleeve and connects to the first pull ring portion; the second operating pull ring includes a second movable sleeve movably disposed on the operating handle located inside the first movable sleeve and a second pull ring portion disposed outside the second movable sleeve, the first movable sleeve forming a clearance groove extending downward from its top surface for the second pull ring portion to pass through, and the lower end of the second connecting rod extends into the second movable sleeve and connects to the second pull ring portion.

[0017] Furthermore, the lower end of the first connecting rod is L-shaped and connected to the first pull ring portion, the lower end of the second connecting rod is L-shaped and connected to the second pull ring portion, and the upper end of the second movable sleeve is located below the lower end of the first connecting rod.

[0018] Furthermore, the cable is configured in a hook shape.

[0019] As can be seen from the above description of this utility model, compared with the prior art, the beneficial effects of this utility model are as follows: By defining the structure of the connecting collar, the pull cable made of memory material or stainless steel guide wire, together with the collar and connecting buckle, allows the connecting collar to be placed around the polyp from the side. This is different from the traditional method of using a snare to put the collar down from the head end of the lesion and then tighten and remove it. This can reduce the influence of the size of the polyp lesion, the effect of gravity, and the complexity of the lesion site on the difficulty of snare removal. It can also minimize the risks of rapid and delayed bleeding and perforation during and after the operation, and at the same time help to reduce problems such as incomplete lesion removal and positive cutting edges. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the electric coil device.

[0021] Figure 2 An exploded view of an electric coil device;

[0022] Figure 3 A partial structural diagram of an electric coil device. Figure 1 ;

[0023] Figure 4 Schematic diagram of part of the electric coil device Figure 2 ;

[0024] Figure 5 for Figure 3 Enlarged view of the middle section structure;

[0025] Figure 6 This is a schematic diagram of the cross-section of the operating lever;

[0026] Figure 7 A schematic diagram of the process for tightening the connecting ring;

[0027] Figure 8 A flowchart illustrating the process of trapping a polyp;

[0028] In the diagram, 1. Operating handle; 2. Connecting collar; 3. Operating mechanism; 4. First operating pull ring; 5. Second operating pull ring; 6. First connecting assembly; 7. Second connecting assembly; 11. Operating handle body; 12. Operating rod; 13. Connecting sleeve; 14. Moving cavity; 141. Moving cavity body; 142. Guide groove; 21. Collar; 22. Pull cable; 23. Connecting buckle; 24. Cut-off area; 25. Connecting post; 26. Locking block; 261. Positioning part; 27. Locking groove; 271. Guide section; 272. Arc-shaped positioning groove; 28. Ring; 41. First moving sleeve; 42. First pull ring part; 43. Relief groove; 51. Second moving sleeve; 52. Second pull ring part; 61. First moving block; 62. First connecting rod; 63. First connecting rope; 71. Second moving block; 72. Second connecting rod; 73. Second connecting rope. Detailed Implementation

[0029] The present invention will be further described below through specific embodiments.

[0030] Reference Figures 1 to 8 As shown, an electric snare with a one-way buckle can be used with an endoscope to remove colorectal polyps with a pedicle diameter ≥1cm. It includes an operating handle 1, a connecting ring 2 set at the front end of the operating handle 1 that can be opened or tightened, and an operating mechanism 3 set on the operating handle 1 to connect to and control the opening or tightening of the connecting ring 2.

[0031] The operating handle 1 includes an operating handle body 11, an operating rod 12 disposed at the front end of the operating handle body 11, and a connecting sleeve 13 disposed at the lower end of the operating rod 12 and connected to the operating handle body 11.

[0032] The connecting collar 2 includes a collar 21 that forms a loop 28 at the front end of the operating handle 1, a pull cable 22 that is positioned opposite to the collar 21 and can be connected to it, and a connecting buckle 23 that is positioned at the front end of the pull cable 22 and can be connected to the collar 21. The pull cable 22 is hook-shaped and made of memory material 304 or elastic stainless steel guide wire. When the connecting collar 2 is opened to its maximum, the connecting buckle 23 passes through the loop 28 formed by the collar 21, so that a resection area for enclosing the polyp is formed between the collar 21 and the pull cable 22. In area 24, the connecting buckle 23 is not engaged with the collar 21. Then, the cable 22 is positioned opposite the side of the polyp. As the connecting collar 2 approaches the polyp, the cable 22 is compressed and bends inward until an opening is formed in the resection area 24, allowing the polyp to enter the resection area 24. The polyp continues to penetrate deeper into the resection area 24, relieving the compression on the cable 22. The cable 22 then returns to its original shape under its own action, encasing the polyp. The operating mechanism 3 then tightens the connecting collar 2 to fix the polyp for subsequent resection.

[0033] The connecting buckle 23 includes a connecting post 25 connected to the front end of the cable 22 and a locking block 26 disposed at the front end of the connecting post 25 that can be connected to the collar 21. The locking block 26 and the front end of the collar 21 have a locking groove 27 formed on their opposite surfaces to engage with the collar 21. Specifically, the front end of the locking block 26 has an upwardly curved positioning part 261. The locking groove 27 includes a guide section 271 extending along one end of the locking block 26 in a direction close to the positioning part 261 and an arc-shaped positioning groove 272 disposed in the positioning part 261 and connected to the guide section 271. When the connecting collar 2 is tightened, the collar 21 first moves inward to tighten, so that the front end of the collar 21 moves from the guide section 271 to the arc-shaped positioning groove 272 and locks in place, thereby connecting the collar 21 and the cable 22. Then, the cable 22 is controlled to move inward to tighten, thereby tightening and securing the polyp.

[0034] The operating mechanism 3 includes a first operating pull ring 4 movably mounted on the operating handle 1, a second operating pull ring 5 movably mounted on the operating handle 1 at the front end of the first operating pull ring 4, a first connecting component 6 connected to the collar 21 in the operating handle 1, and a second connecting component 7 connected to the cable 22 in the operating handle 1. During operation, the first operating pull ring 4 cooperates with the first connecting component 6, and the second operating pull ring 5 cooperates with the second connecting component 7, respectively controlling the collar 21 and the cable 22 to move inward to tighten or move outward to open, thereby achieving the tightening and opening of the connecting collar 2.

[0035] The first connecting component 6 includes a first moving block 61 movably disposed in the operating lever 12 and connected to the collar 21, a first connecting rod 62 disposed in the operating handle body 11 and connected to the first operating pull ring 4, and a first connecting rope 63 disposed between the first moving block 61 and the first connecting rod 62.

[0036] The second connecting assembly 7 includes a second moving block 71 movably disposed in the operating lever 12 and connected to the cable 22, a second connecting rod 72 disposed in the operating handle body 11 and connected to the second operating pull ring 5, and a second connecting rope 73 disposed between the second moving block 71 and the second connecting rod 72. The operating lever 12 has two moving cavities 14 spaced apart and extending along its length. The first moving block 61 and the second moving block 71 are movably disposed in the two moving cavities 14. Specifically, each moving cavity 14 includes a moving cavity body 141 and two guide grooves 142 extending outward from opposite sides of the moving cavity body 141. The shapes of the first moving block 61 and the second moving block 71 are adapted to the shape of the moving cavity 14. By defining the structure of the moving cavity 14, the first moving block 61 and the second moving block 71 can only move relative to each other within the moving cavity 14 and will not rotate, thus affecting the operation of the connecting collar 2.

[0037] The first operating pull ring 4 includes a first movable sleeve 41 movably disposed on the operating handle body 11 and a first pull ring portion 42 disposed outside the first movable sleeve 41. The lower end of the first connecting rod 62 extends into the first movable sleeve 41 and connects with the first pull ring portion 42. Specifically, the lower end of the first connecting rod 62 is L-shaped and connects with the first pull ring portion 42.

[0038] The second operating pull ring 5 includes a second movable sleeve 51 movably disposed on the operating handle body 11 inside the first movable sleeve 41 and a second pull ring portion 52 disposed outside the second movable sleeve 51. The first movable sleeve 41 has a relief groove 43 extending downward from its top surface for the second pull ring portion 52 to pass through. The lower end of the second connecting rod 72 extends into the second movable sleeve 51 and connects with the second pull ring portion 52. Specifically, the lower end of the second connecting rod 72 is L-shaped and connects with the second pull ring portion 52. The upper end of the second movable sleeve 51 is located below the lower end of the first connecting rod 62, so that when the connecting collar 2 is tightened, the first operating pull ring 4 and the second operating pull ring 5 can work independently without affecting each other. When the connecting collar 2 is opened, the first movable sleeve 41 moves along the direction close to the connecting collar 2, which will drive the second movable sleeve 51 to move together, so that the connecting collar 2 opens quickly, which is simple to operate and easy to implement.

[0039] The specific procedure for removing polyps using the aforementioned electric snare is as follows:

[0040] Step 1: Move the electric ring applicator to the designated position. Hold the first pull ring 42 and the second pull ring 52 and move the first moving sleeve 41 and the second moving sleeve 51 in the direction close to the connecting sleeve 2, so that the sleeve 21 and the cable 22 move outward respectively, opening the connecting sleeve 2. During the outward movement of the sleeve 21 and the cable 22, due to the action of the material of the cable 22 itself, the connecting buckle 23 at its front end will first disengage from the sleeve 21. When the connecting sleeve 2 is opened to the maximum, the connecting buckle 23 passes through the ring 28 formed by the sleeve 21, so that a cutting area 24 for looping the polyp is formed between the sleeve 21 and the cable 22. At this time, the connecting buckle 23 is not connected to the sleeve 21.

[0041] Step 2: Position the pull cable 22 opposite the side of the polyp pedicle, and then control the connecting loop 2 to approach the polyp. As the connecting loop 2 approaches the polyp, the pull cable 22 will be squeezed and bend inward until the resection area 24 forms an opening, allowing the polyp to enter the resection area 24. As the polyp continues to penetrate deeper into the resection area 24, the pressure on the pull cable 22 is released, and the pull cable 22 will return to its original shape under its own action, thus securing the polyp.

[0042] Step 3: Hold the first pull ring 42 and move the first movable sleeve 41 away from the connecting collar 2, causing the collar 21 to move inward and tighten. During the inward tightening process, the front end of the collar 21 will first contact the guide section 271, and then move from the guide section 271 to the arc-shaped positioning groove 272 and lock in place, thus connecting the collar 21 with the pull cable 22. Next, hold the second pull ring 52 and move the second movable sleeve 51 away from the connecting collar 2, causing the pull cable 22 to move inward and tighten, thus encasing and fixing the polyp. Combined with high-frequency action, the polyp with a thick stalk is removed.

[0043] This application, by defining the structure of the connecting loop 2, uses a pull cable 22 made of memory material or stainless steel guide wire, in conjunction with a collar 21 and a connecting buckle 23, to allow the connecting loop 2 to encircle the polyp from the side. This differs from the traditional method of using a snare to encircle the polyp from the head end and then tighten and remove it. This reduces the impact of the size of the polyp (due to gravity) and the complexity of the lesion location on the difficulty of snare removal, minimizing the risk of rapid and delayed bleeding and perforation during and after the operation. It also helps to reduce problems such as incomplete lesion removal and positive margins.

[0044] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model application and the contents of the specification should still fall within the scope of the present utility model application.

Claims

1. An electric coil catcher with a one-way buckle, characterized in that: It includes an operating handle, a connecting collar located at the front end of the operating handle that can be opened or tightened, and an operating mechanism located on the operating handle that connects to and controls the opening or tightening of the connecting collar. The connecting collar includes a collar that can form a loop at the front end of the operating handle, a cable that can be connected to the collar and is located on one side opposite to the collar, and a connecting buckle that can be connected to the collar at the front end of the cable. The cable is made of memory material or stainless steel wire. When the connecting collar is opened to its maximum, the connecting buckle passes through the loop formed by the collar, so that a resection area for locating the polyp is formed between the collar and the cable.

2. The electric coil catcher with a one-way buckle according to claim 1, characterized in that: The connecting buckle includes a connecting post connected to the front end of the cable and a locking block disposed at the front end of the connecting post that can be connected to a collar. The locking block has a locking groove on the opposite surface of the front end of the collar that engages with the collar.

3. The electric coil catcher with a one-way buckle according to claim 2, characterized in that: The front end of the locking block has an upwardly curved positioning part. The locking groove includes a guide section extending along one end of the locking block in a direction close to the positioning part and an arc-shaped positioning groove connected to the guide section in the positioning part. When the connecting collar is tightened, the collar moves inward first to tighten so that the front end of the collar moves from the guide section to the arc-shaped positioning groove and locks in, thereby realizing the connection between the collar and the cable.

4. The electric coil catcher with a one-way buckle according to claim 1, characterized in that: The operating mechanism includes a first operating pull ring movably disposed on the operating handle, a second operating pull ring movably disposed on the operating handle at the front end of the first operating pull ring, a first connecting component disposed in the operating handle connecting the first operating pull ring and the collar, and a second connecting component disposed in the operating handle connecting the second operating pull ring and the cable.

5. An electric coil catcher with a one-way buckle according to claim 4, characterized in that: The operating handle includes an operating handle body, an operating rod disposed at the front end of the operating handle body, and a connecting sleeve disposed at the lower end of the operating rod and connected to the operating handle body.

6. An electric coil catcher with a one-way buckle according to claim 5, characterized in that: The first connecting component includes a first movable block movably disposed in the operating lever and connected to a collar, a first connecting rod disposed in the operating handle body and connected to a first operating pull ring, and a first connecting rope disposed between the first movable block and the first connecting rod. The second connecting component includes a second movable block movably disposed in the operating lever and connected to a cable, a second connecting rod disposed in the operating handle body and connected to a second operating pull ring, and a second connecting rope disposed between the second movable block and the second connecting rod.

7. An electric coil catcher with a one-way buckle according to claim 6, characterized in that: The operating lever has two movable cavities extending along its length, and the first movable block and the second movable block are respectively movably disposed in the two movable cavities. Each movable cavity includes a movable cavity body and two guide grooves extending outward on opposite sides of the movable cavity body. The shapes of the first movable block and the second movable block are adapted to the shape of the movable cavity.

8. An electric coil catcher with a one-way buckle according to claim 6, characterized in that: The first operating pull ring includes a first movable sleeve movably disposed on the operating handle and a first pull ring portion disposed outside the first movable sleeve. The lower end of the first connecting rod extends into the first movable sleeve and connects with the first pull ring portion. The second operating pull ring includes a second movable sleeve movably disposed on the operating handle located inside the first movable sleeve and a second pull ring portion disposed outside the second movable sleeve. The first movable sleeve has a relief groove extending downward from its top surface for the second pull ring portion to pass through. The lower end of the second connecting rod extends into the second movable sleeve and connects with the second pull ring portion.

9. An electric coil catcher with a one-way buckle according to claim 8, characterized in that: The lower end of the first connecting rod is L-shaped and connected to the first pull ring portion, the lower end of the second connecting rod is L-shaped and connected to the second pull ring portion, and the upper end of the second movable sleeve is located below the lower end of the first connecting rod.

10. An electric coil catcher with a one-way buckle according to claim 1, characterized in that: The cable is designed in a hook shape.

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