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Balloon dilatation catheter, balloon and preparation method of balloon

A balloon and expanded state technology, which is applied in the direction of balloon catheters, catheters, and other medical devices, can solve the problems of low puncture resistance and high compliance of valve balloons, and achieve small compliance and high puncture resistance sexual effect

Pending Publication Date: 2020-05-29
SHANGHAI MICROPORT CARDIOFLOW MEDTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a balloon dilatation catheter, a balloon and a preparation method thereof, so as to solve the problems of low puncture resistance and large compliance of existing valve balloons

Method used

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  • Balloon dilatation catheter, balloon and preparation method of balloon
  • Balloon dilatation catheter, balloon and preparation method of balloon
  • Balloon dilatation catheter, balloon and preparation method of balloon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The balloon 10 in this embodiment is made by blending L25 and TR55, wherein the mass ratio of L25:TR55 is between 9:1 and 7:3. Preferably, the mass ratio of L25:TR55 is 8:2. Among them, please refer to figure 2 and image 3 , the preparation method of the balloon 10 is as follows:

[0061] Step 1: extruding the nylon blended material through an extrusion device to form a hollow tube, and putting the hollow tube into a molding cavity of a balloon forming mold. Here, the nylon blend material is composed of L25 and TR55, and the hollow tubing preferably has a three-layer structure, and the length of the balloon forming mold is preferably 47.8 mm to 50.6 mm.

[0062] Step 2: closing one end of the hollow pipe, and feeding nitrogen gas with a pressure of 8atm to 12atm into the other end of the hollow pipe;

[0063] Step 3: heating the hollow pipe to 100°C-120°C, applying a tension between 200N-300N at both ends of the hollow pipe, and axially stretching the hollow pipe ...

Embodiment 2

[0091] The balloon 10 in this embodiment is made by blending L25 and TR90, wherein the mass ratio of L25:TR90 is between 9:1 and 6:4. Preferably, the mass ratio of L25:TR90 is 7:3. Specifically, the preparation method of the balloon 10 is as follows:

[0092] Step 1: extruding the nylon blended material through an extrusion device to form a hollow tube, and putting the hollow tube into a balloon forming mold. Here, the nylon blend material is composed of L25 and TR90, and the hollow tubing preferably has a two-layer structure, and the length of the balloon forming mold is preferably 39.5mm-41.5mm.

[0093] Step 2: closing one end of the hollow pipe, and feeding nitrogen gas with a pressure of 9.5atm to 11.5atm into the other end of the hollow pipe;

[0094] Step 3: heating the hollow pipe to 110°C-130°C, applying a tension between 220N-300N at both ends of the hollow pipe, and axially stretching the hollow pipe at a stretching speed of 80mm / s-120mm / s The hollow tubing is 20...

Embodiment 3

[0105] The balloon 10 in this embodiment is made by blending L25, TR55 and TR90, wherein the mass percentage of TR90 is 10%, and the mass ratio of L25:TR55 is between 7:2 and 5:4. Preferably, the mass ratio of L25:TR55:TR90 is 6:3:1.

[0106] Specifically, the preparation method of the balloon 10 is as follows:

[0107] Step 1: extruding the nylon blended material through an extrusion device to form a hollow tube, and putting the hollow tube into a balloon forming mold. Here, the nylon blend material is composed of L25, TR55 and TR90, and the hollow tube preferably has a three-layer structure, and the length of the balloon forming mold is preferably between 57.5 mm and 59.5 mm.

[0108] Step 2: closing one end of the hollow pipe, and feeding nitrogen gas with a pressure of 11.5atm to 13.5atm into the other end of the hollow pipe, and sealing the other end;

[0109] Step 3: heating the hollow pipe to 100°C-120°C, applying a tension between 160N-220N at both ends of the hollow...

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Abstract

The invention provides a balloon dilatation catheter, a balloon and a preparation method of the balloon. The balloon is made of L25 and at least two of TR55, TR90 and TR70 through blending. Compared with a balloon made of a single nylon material, the balloon provided by the invention has good puncture resistance and small compliance. In addition, the balloon provided by the invention is preferablyof a hollow multi-layer structure, and compared with a single-layer structure, the hollow multi-layer structure is capable of further improving the puncture resistance and further reducing the compliance of the balloon.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a balloon dilatation catheter, a balloon and a preparation method thereof. Background technique [0002] Since Inoue successfully carried out percutaneous balloon valvuloplasty (PBV) in 1984, PBV has become one of the important methods for the treatment of heart valve diseases. Percutaneous balloon valvuloplasty has the advantages of less trauma, safety, and definite curative effect, and it has replaced open heart valve incision / dissection to a certain extent. The valve balloon is suitable for patients with severe calcific aortic valve stenosis and surgical contraindications or high risks. The valve balloon can be used to dilate and dredge the stenotic lesion, which is conducive to the implantation of the valve stent. At the same time, through the post-expansion of the valve balloon It can make the aortic valve stick better, and the healing effect is better. [0003] However, in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/10A61L29/06A61L29/14
CPCA61M25/1002A61M25/104A61M25/1029A61L29/049A61L29/14A61M2025/1079A61M2205/0216C08L77/00A61M2025/1075A61M2025/1031C08L77/02A61L29/06A61M25/10A61M25/1034A61M2207/00
Inventor 岳斌贾婧玮陈国明李雨
Owner SHANGHAI MICROPORT CARDIOFLOW MEDTECH CO LTD
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