Biliary tract radiotherapy stent
A bile duct and inner stent technology, applied in the field of medical devices, can solve the problems of inability to change, and there is no way to fine-tune it, and achieve good results.
Inactive Publication Date: 2015-05-06
张健
View PDF5 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
But the biliary stent also has its limitations. For example, the expansion can only rely on the characteristics of the material itself, and there is no way to fine-tune it after implantation. The position of the cyst is fixed and cannot change with the situation in the biliary tract
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0012] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0013] Depend on figure 1 It can be seen that a stent for biliary tract radiotherapy includes an outer stent 1 and an inner stent 2. In the state of use, the main part of the inner stent 2 is expanded and supported in the outer stent 1, and the inner stent 2 is braided by nickel-titanium alloy wire or a polymer shape memory material. The first mesh skeleton structure 3 formed, the main body of the outer bracket 1 is also the second mesh skeleton structure 4 woven from nickel-titanium alloy or polymer shape memory material, and the inner bracket 2 is clamped to make the outer bracket 1 and the automatic expansion and contraction device of the inner support 2, and the surface of the second mesh skeleton structure 4 is equipped with a mobile radiation particle filling capsule.
[0014] In the present invention, the preferred automatic t...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a biliary tract radiotherapy stent, comprising an outer stent and an inner stent. Under a use state, a main body part of the inner stent is in expanding support in the outer stent; the inner stent is of a first mesh skeleton structure woven by nickel-titanium wires or shape memory polymer materials; the main body of the outer stent is also a second mesh skeleton structure woven by nickel-titanium wires or shape memory polymer materials; the inner stent is in clamping connection with an automatic expansion and contraction device capable of making the outer stent and the inner stent expand and contract; the surface of the second mesh skeleton structure is provided with a mobile radion packing bag. According to the biliary tract radiotherapy stent disclosed by the invention, after the stent is implanted into a human body, the positions of the stent and the radion can be adjusted finely along with the change of the state of an illness by means of placing the automatic expansion and contraction device in the stent and installing the mobile radion packing bag on the surface of the second mesh skeleton structure, and thus, the use effect of the biliary tract radiotherapy stent is better.
Description
technical field [0001] The invention relates to a medical device, in particular to a bracket for biliary radiotherapy. Background technique [0002] With the development of endoscopy and interventional radiology, using minimally invasive ERCP or PTCD to treat cholangiocarcinoma and changing external drainage to internal drainage is relatively simple and has achieved good therapeutic effects. The use of metal stents for biliary drainage has less trauma, and a larger-diameter stent can be implanted with a thinner catheter, with fewer early complications and low surgical mortality. But the biliary stent also has its limitations. For example, the expansion can only rely on the characteristics of the material itself, and there is no way to fine-tune it after implantation. The position of the capsule is fixed and cannot be changed with the situation in the biliary tract. Contents of the invention [0003] In view of the above problems, the present invention proposes a stent fo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): A61M36/12A61F2/90
Inventor 张健
Owner 张健