Biliary stent weaving tool

Abstract

The biliary stent weaving tool comprises a main pipe and a plurality of guide positioning pins, a plurality of thread line grooves are formed in the outer wall of the main pipe, the thread line grooves are mutually staggered to form a grid structure, a plurality of first hole sets are formed in the outer wall of the main pipe and are distributed in the axial direction of the main pipe, and a plurality of second hole sets are formed in the outer wall of the main pipe. Each first hole set comprises a plurality of first pin holes, the first pin holes are formed in the circumferential direction of the main pipe at equal intervals, the guide positioning pin can be matched with any first pin hole in a positioning mode, and a tightening screw is installed on the side wall of one end of the main pipe in a threaded mode and used for fixing the head end of a wire. The support can be rapidly knitted through manual operation, the structure is simple, operation is convenient, efficiency is high, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a biliary stent braiding tool. Background Art

[0002] The biliary system secretes, stores, concentrates, and transports bile, playing a crucial role in regulating bile drainage into the duodenum. Malignant biliary obstruction, caused by malignancies such as bile duct cancer, liver cancer, pancreatic cancer, and metastatic cancer, is highly prevalent and often diagnosed in the late stages. Implanting a biliary stent at the site of stenosis or obstruction is a promising treatment option for biliary obstruction.

[0003] Currently, the most widely used biliary stent is a braided mesh stent made of titanium and nickel shape memory alloy, which is in the shape of a straight cylinder with a trumpet at one or both ends. Biliary stenting is a minimally invasive and repeatable treatment for malignant biliary obstruction, which can effectively relieve malignant biliary obstruction and is comparable to surgical shunt surgery. However, the braiding operation of existing biliary stents is relatively complicated, which not only reduces production efficiency and increases production costs, but also easily causes wire breakage during the braiding process, affecting production quality. Summary of the Invention

[0004] In view of the above problems existing in the existing biliary stent weaving, the present invention aims to provide a biliary stent weaving tool that improves production efficiency, reduces costs and improves quality.

[0005] The specific technical solutions are as follows:

[0006] A biliary stent braiding tool, comprising:

[0007] a main pipe, wherein an outer wall of the main pipe has a plurality of thread grooves, the plurality of thread grooves being staggered to form a grid structure, the outer wall of the main pipe having a plurality of first hole groups, the plurality of first hole groups being distributed along the axial direction of the main pipe, each first hole group including a plurality of first pin holes, the plurality of first pin holes being arranged at equal intervals along the circumference of the main pipe;

[0008] A plurality of guide positioning pins, each of which can be positioned and matched with any of the first pin holes;

[0009] A tightening screw is threadedly installed on the side wall of one end of the main pipe for fixing the head end of the wire.

[0010] Furthermore, as a preferred embodiment, the outer wall of the main pipe also has a plurality of second hole groups, and the plurality of second hole groups are respectively located on one side of the plurality of first hole groups, and each second hole group includes a plurality of second pin holes distributed at equal intervals along the circumferential direction, and the guide positioning pin can be positioned and matched with any of the second pin holes.

[0011] Furthermore, as a preferred embodiment, the main pipe is a hollow metal pipe.

[0012] Furthermore, as a preferred embodiment, a side wall at one end of the main pipe has a threaded hole, and the tightening bolt is threadedly installed in the threaded hole.

[0013] Furthermore, as a preferred embodiment, the threaded hole is arranged radially through the main pipe.

[0014] Furthermore, as a preferred embodiment, the diameter of the guide positioning pin is approximately 4-10 times the diameter of the wire.

[0015] Furthermore, as a preferred embodiment, both ends of the main pipe are rounded.

[0016] Compared with the prior art, the above technical solution has the following positive effects:

[0017] (1) The utility model can complete the weaving of brackets of different lengths through a single weaving main pipe, thereby saving the number of main pipes and saving costs.

[0018] (2) In the present invention, two different edge finishing forms can be achieved by weaving the main pipe, the first hole group, the second hole group and the guide positioning pin, thereby improving applicability.

[0019] (3) The braiding operation in the present invention can be performed manually to quickly braid the bracket, which has a simple structure, convenient operation, high efficiency and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a conventional edge-finishing of a biliary stent braiding tooling of the present invention;

[0021] Figure 2 This is a cross-sectional view of the main pipe under conventional trimming of a biliary stent braiding tooling of the present invention;

[0022] Figure 3 This is a schematic structural diagram of a conventional edge-trimmed biliary stent of a biliary stent braiding tooling of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of a conventional edge trimming of a biliary stent braiding tooling of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a "W"-shaped edge of a woven tool for a biliary stent according to the present invention;

[0025] Figure 6 This is a cross-sectional view of the main pipe under the "W"-shaped edge of a biliary stent braiding tooling of the utility model;

[0026] Figure 7 This is a structural diagram of a "W"-shaped edge-covered biliary stent of a biliary stent weaving tooling of the utility model;

[0027] In the accompanying drawings: 1. Main pipe; 2. Guide positioning pin; 3. Tightening screw; 4. Biliary stent; 5. Wire; 11. Spiral wire groove; 12. First pin hole; 13. Second pin hole. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like are used to indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of this utility model and to simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Figure 1 This is a structural diagram of a conventional edge-cutting method for a biliary stent braiding tooling of the utility model. Figure 2 This is a cross-sectional view of the main pipe under the conventional edge trimming of a biliary stent braiding tooling of the utility model. Figure 3 This is a schematic structural diagram of a conventional edge-trimmed biliary stent of a biliary stent braiding tooling of the utility model.

[0032] Figure 4 This is a schematic diagram of the structure of a conventional edge trimming of a biliary stent braiding tooling of the utility model.

[0033] Figure 5 This is a schematic diagram of the structure of the "W"-shaped edge of a biliary stent braiding tooling of the utility model.

[0034] Figure 6 This is a cross-sectional view of the main pipe under the "W"-shaped edge of a biliary stent braiding tooling of the utility model. Figure 7 This is a schematic diagram of the structure of a "W"-shaped biliary stent with edge trimming of a biliary stent braiding tooling of the utility model. Figure 1-7 As shown, a preferred embodiment of a biliary stent 4 braiding tooling is shown, including: a main pipe 1 and several guide positioning pins 2, the outer wall of the main pipe 1 has several thread grooves, the several thread grooves are staggered with each other and form a grid structure, the outer wall of the main pipe 1 has several first hole groups, the several first hole groups are distributed along the axial direction of the main pipe 1, each first hole group includes several first pin holes 12, and the several first pin holes 12 are arranged at equal intervals along the circumference of the main pipe 1. The guide positioning pin 2 can be positioned and matched with any first pin hole 12, and a tightening screw 3 is threadedly installed on the side wall of one end of the main pipe 1 for fixing the head end of the wire 5.

[0035] In this embodiment, during the actual weaving and conventional edge finishing operations, one end of the wire 5 is connected to the tightening screw 3 and the tightening screw 3 is tightened. Several first pin holes 12 of the first hole group near one end of the tightening screw 3 are respectively positioned and inserted into several guide positioning pins 2. According to the required length of the biliary stent 4, several first pin holes 12 of another group of corresponding first hole groups are respectively positioned and inserted into several guide positioning pins 2. The wire 5 is passed through one of the guide positioning pins 2 at one end of the main pipe 1 and is circularly wound along one of the thread grooves. It is wound around one of the guide positioning pins 2 at the other end of the main pipe 1 and then turned back and wound. The winding is repeated so that the contact point of the wire 5 is alternately wound up and down until the end of the wire 5 intersects with the starting section to complete the stent weaving.

[0036] This embodiment not only has a simple structure and low cost, but also has a guiding and positioning effect on the wire 5 by providing the spiral wire groove 11, which greatly reduces the weaving difficulty, improves production efficiency and effectively reduces the breakage of the wire 5 during the weaving process.

[0037] In this embodiment, according to the required length of the biliary stent 4, the guide positioning pins 2 can be positioned and inserted into the two first hole groups corresponding to the interval length for weaving, thereby improving applicability.

[0038] Preferably, the depth of the spiral groove 11 is about 1 / 2-1 / 3 of the diameter of the wire 5 .

[0039] Furthermore, as a preferred embodiment, the main pipe 1 is a hollow metal pipe.

[0040] Furthermore, as a preferred embodiment, a side wall at one end of the main pipe 1 has a threaded hole, and a tightening bolt is threadedly installed in the threaded hole.

[0041] Furthermore, as a preferred embodiment, the threaded hole is provided radially through the main pipe 1 .

[0042] Furthermore, as a preferred embodiment, the diameter of the guide positioning pin 2 is approximately 4-10 times the diameter of the wire.

[0043] Furthermore, as a preferred embodiment, both ends of the main pipe 1 are rounded.

[0044] The present invention also has the following implementation methods based on the above:

[0045] The outer wall of the main pipe 1 also has several second hole groups, which are respectively located on one side of the several first hole groups. Each second hole group includes several second pin holes 13 distributed at equal intervals along the circumferential direction. The guide positioning pin 2 can be positioned and matched with any second pin hole 13.

[0046] Before weaving, and after the guide positioning pins 2 of the two first hole groups are inserted and positioned, the guide positioning pins 2 can be inserted into the several second pin holes 13 of the two second hole groups respectively arranged on one side of the two first hole groups, so that the biliary stent 4 can pass through the guide positioning pins 2 in the first pin holes 12 and the guide positioning pins 2 in the second pin holes 13 in sequence when the end of the weaving is trimmed, so that the biliary stent 4 is trimmed in a "W" shape. When it is difficult to load a conventional trimmed stent into the sheath, a "W"-shaped trimmed stent can be selected for loading.

[0047] More specifically, when the number of ends of the bracket is set to an even number, a "W" type edge trim can be applied.

[0048] In this embodiment, one braided main tube 1 can be used to braid brackets of different lengths, thereby saving the number of main tubes 1 and saving costs.

[0049] In this embodiment, two different edge finishing forms can be achieved by weaving the main pipe 1, the first hole group, the second hole group and the guide positioning pin 2, thereby improving applicability.

[0050] In this embodiment, the braiding operation can be performed manually to quickly braid the stent, which has a simple structure, convenient operation, high efficiency and low cost.

[0051] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A biliary stent braiding tool, characterized in that: include: a main pipe, wherein an outer wall of the main pipe has a plurality of thread grooves, the plurality of thread grooves being staggered to form a grid structure, the outer wall of the main pipe having a plurality of first hole groups, the plurality of first hole groups being distributed along the axial direction of the main pipe, each first hole group including a plurality of first pin holes, the plurality of first pin holes being arranged at equal intervals along the circumference of the main pipe; A plurality of guide positioning pins, wherein the guide positioning pins can be positioned and matched with any of the first pin holes; a tightening screw is threadedly installed on the side wall of one end of the main pipe for fixing the head end of the wire.

2. The biliary stent braiding tool according to claim 1, characterized in that: The outer wall of the main pipe also has several second hole groups, which are respectively located on one side of the first hole groups. Each second hole group includes several second pin holes distributed at equal intervals along the circumferential direction. The guide positioning pin can be positioned and matched with any second pin hole.

3. The biliary stent braiding tool according to claim 1, characterized in that: The main pipe is a hollow metal pipe.

4. The biliary stent braiding tool according to claim 1, characterized in that: A threaded hole is formed on a side wall at one end of the main pipe, and the tightening bolt is threadedly installed in the threaded hole.

5. The biliary stent braiding tool according to claim 4, characterized in that: The threaded hole is radially disposed through the main pipe.

6. The biliary stent braiding tool according to claim 1, characterized in that: The diameter of the guide positioning pin is approximately 4-10 times the diameter of the wire.

7. The biliary stent braiding tool according to claim 1, characterized in that: Both ends of the main pipe are rounded.

Images