Anti-restenosis digestive tract stent

An anti-restenosis and digestive tract technology, applied in the field of medical equipment, can solve problems such as difficult positioning and restenosis, and achieve the effects of less patient pain, prevention of benign restenosis, and low risk

Inactive Publication Date: 2012-02-01
MICRO TECH (NANJING) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing stents in the digestive tract cannot adapt to bending deformation, difficult positioning, and easy to cause restenosis. The wall of the cavity is better fixed at the stenosis of the digestive tract, and it is not easy to shift. It plays the role of expanding and supporting the stenosis. At the same time, it has less stimulation to the tube wall, which can better prevent restenosis after stenting and prevent tumors anti-restenosis gastrointestinal stent

Method used

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  • Anti-restenosis digestive tract stent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as Figure 1-7 shown.

[0033] An anti-restenosis digestive tract stent (such as figure 1 , 2 , 3), the bracket main body 1 is a right cylinder formed by connecting several bracket units 2 with a connecting part 3 or a composite body composed of multiple cylinders and cones. Its biggest feature is that it can be bent arbitrarily at the connecting part 3 to adapt to the curved shape of the digestive tract, and the number of connecting parts 3 is one less than the number of bracket units 2 . The bracket unit 2 is made of metal pipes (such as titanium pipes), and can also be used Image 6 The shown structure is braided by wires and has a certain rigidity, and the connecting part 3 is made of materials such as metal wires or plastic wires with good flexibility. When the support unit 2 adopts a braided structure, it can be composed of a connecting unit 6 and a supporting unit 7. The structures of the two units can be known structures or other structures, and the arr...

Embodiment 2

[0037] Such as Figure 5 , 8 shown.

[0038] An anti-restenosis digestive tract stent (such as Figure 5As shown), the surface of the stent main body 1 can also carry radioactive particle capsules 8 for treating tumors. The material of the radioactive particle-filled capsules 8 is medical polymer tubing or medical metal tubing, etc., and the shape is long cylinder, single capsule structure, etc. .

[0039] There may be one or more radioactive particle filling capsules, which may be arranged in equal parts along the circumference, or in a diamond shape, or asymmetrically.

[0040] During use, the doctor fills radioactive particles in the radioactive particle filling bag 8 in advance, then compresses the stent and puts it into the stent delivery device, and sends the main body stent 1 to the The narrow part of the lesion is released, the stent is accurately fixed on the stricture in the digestive tract, restores its shape and expands to open the stricture to keep the drainag...

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Abstract

The invention discloses an anti-restenosis digestive tract stent which is characterized in that a main body (1) is formed by connecting a plurality of stent units (2) and an easily-bent connecting part (3), wherein two ends of the connecting part (3) are respectively connected with the corresponding stent unit (2), the main body (1) is of a right circular cylinder structure which is easy to bend or a composite structure which is easy to bend and consists of a cylinder and a cone; and each stent unit (2) is of an integral structure formed by carving a metal pipe material or a structure formed by weaving a silk material, and the connecting part (3) is formed by weaving a metal line material or plastic line material with good flexibility. The anti-restenosis digestive tract stent has better radial supporting strength and better compliance, and ensures that the stent has the advantages of more accuracy of positioning, difficulty in translocation, low restenosis incidence and the like.

Description

technical field [0001] The invention relates to a medical device, especially an internal stent for the treatment of the digestive tract, specifically an internal stent used to treat symptoms such as stenosis and obstruction of the digestive tract caused by different reasons, and can also be used for tumors in the digestive tract. Therapeutic anti-restenosis gastrointestinal stents. Background technique [0002] In many cases, the digestive tract in the human body will be narrowed or obstructed due to tumors and other reasons. Without timely and effective treatment, most patients will have difficulty swallowing, which will seriously deteriorate the condition and cause a rapid decline in physical condition leading to die. Due to the high risk of surgery, long postoperative recovery period, and greater pain for patients, non-surgical treatment methods are required to relieve symptoms in the digestive tract such as stricture or obstruction. With the development of intervention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M36/00A61F2/90
Inventor 郭金和李玉茜陈晓丹滕皋军朱光宇冷德嵘
Owner MICRO TECH (NANJING) CO LTD
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