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Biliary tract radiation treatment stent

A biliary and external stent technology, applied in the field of medical devices, can solve problems such as large side effects and poor curative effect, and achieve the effects of less side effects, fewer complications and good application prospects.

Inactive Publication Date: 2010-04-21
MICRO TECH (NANJING) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to design a method that can not only expand bile duct stenosis, but also have targeted radiotherapy for the problems of large side effects and poor curative effect caused by systemic radiotherapy in addition to stent expansion. Biliary radiotherapy stent

Method used

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  • Biliary tract radiation treatment stent
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  • Biliary tract radiation treatment stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 , 2 , 3, 4 shown.

[0032] A stent for biliary radiotherapy, which includes an outer stent 1 mainly used for installing radiation materials and an inner stent 2 for positioning the outer stent 1 in the bile duct, the outer stent 1 and the inner stent 2 are in a separate state when not in use, and only The main part of the inner bracket 2 is expanded and supported in the outer bracket 1 in the state of use. The main body of the inner stent 2 is a cylindrical grid skeleton structure 7 woven from nickel-titanium alloy wires, such as image 3 As shown; the main body of the outer support 1 is also a network skeleton structure 3 woven by nickel-titanium alloy wire, such as figure 1 , 2 As shown, on the surface of the network skeleton structure 3, a radioactive particle filling capsule 4 is installed, and the radioactive particle filling capsule 4 can be positioned through the barbs (relative to the insertion direction) on the surface of the net skeleton s...

Embodiment 2

[0036] Such as figure 1 , 2 , 3, and 5.

[0037] A stent for biliary tract radiotherapy, including an outer stent 1 and an inner stent 2, wherein the outer stent body 1 is composed of a nickel-titanium alloy wire woven into a cylindrical mesh skeleton structure 3 and a capsule 4 filled with radiation particles, and the cylindrical mesh skeleton structure 3 and the radiated particle filling capsule 4 are connected together with the mesh skeleton structure 3 through the barbs on the mesh skeleton structure 3 (the method of suturing can also be used) (such as figure 1 , 2shown), the radiated particle filling bag 4 is formed by a medical plastic heat-shrinkable tube, and after the radiated particle 6 is loaded, the radiated particle 6 is fixed inside it by heating and shrinking the heat-shrinkable tube (such as Figure 5 shown). The inner stent 2 is also a cylindrical mesh skeleton 7 (such as image 3 shown). All the other parts are the same as the first embodiment.

[0038...

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Abstract

The invention relates to a biliary tract radiation treatment stent which is characterized by comprising an outer stent (1) and an inner stent (2), wherein the main part of the inner stent (2) is expanded in the outer stent (1) in a use state, the main body of the inner stent (2) is a columnar grid framework structure (7) formed by weaving nickel and titanium wires; and the main body of the outer stent (1) is a mesh framework structure (3) formed by weaving nickel and titanium wires, and a radiation particle filling bag (4) is arranged on the surface of the mesh framework structure (3). The invention has the advantages of simple and novel structure, minimally invasive procedure, low risk, little pain of patients, good treatment effect and less complications.

Description

technical field [0001] The invention relates to a medical device, in particular to a stent capable of dilating biliary tract stenosis and performing radiotherapy on biliary tract tumors, in particular a biliary tract radiotherapy stent. Background technique [0002] As we all know, the traditional treatment of cholangiocarcinoma is surgery, but only 20% of the tumor can be surgically removed. For those who cannot be removed, biliary anastomosis or biliary T-tube external drainage can be selected for palliative treatment. Although this treatment can be effective Relieve obstruction and improve clinical symptoms, but there are still some problems, such as difficult surgery, many early complications, postoperative biliary tract infection, etc. Therefore, palliative surgery has poor curative effect, large trauma, and low quality of life. Cholangiocarcinoma is always a surgical option. One of the problems of treatment. [0003] In 1979, he invented the application of endoscopic ...

Claims

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Application Information

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IPC IPC(8): A61F2/90A61N5/00A61L27/06A61F2/91
Inventor 冷德嵘郭金和潘长网李玉茜滕皋军
Owner MICRO TECH (NANJING) CO LTD
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