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Self-enhanced thin-wall miniature balloon and manufacturing method thereof

A technology of balloons and balloon tubes, applied in medical science, internal bone synthesis, internal fixators, etc., to achieve the effect of increasing the number and enhancing the tear resistance

Active Publication Date: 2014-11-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, most of the literature reports on inflatable balloons used in kyphoplasty describe the balloon material, the relationship between the balloon and catheter components, and the use of balloon catheters. preparation method

Method used

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  • Self-enhanced thin-wall miniature balloon and manufacturing method thereof
  • Self-enhanced thin-wall miniature balloon and manufacturing method thereof
  • Self-enhanced thin-wall miniature balloon and manufacturing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0048] The preparation method of the present invention comprises the following steps: the thermoplastic elastomer tube blank undergoes multi-stage expansion to obtain a self-reinforced expansion tube; the self-reinforcing expansion tube is molded by a balloon mold to obtain a balloon tube; the balloon tube is coaxially Reverse stretching yields a self-reinforcing balloon.

[0049]Specifically, polyurethane thermoplastic elastomer pipes (also known as pipe blanks) are selected, and the pipes are expanded axially and circumferentially for 2-5 times. Taking two axial and circumferential expansions of the pipe as an example, the method of axial and circumferential expansion is described. The pipe material 10 is optionally heated to a high elastic state, and the pipe material 10 is pulled, and the pulling speed at both ends is different, and the pulling speed difference axially stretches the tube blank 10 to perform axial expansion, such as figure 2 As shown, at the same time, th...

Embodiment 1

[0057] Cut 100mm of thermoplastic polyurethane original pipe of φ3.2mm×0.6mm. Heat a copper primary conical expansion rod with a cone angle of 30°, a cone length of 20mm, an outer diameter of 5mm, and a length of 200mm to 100°C. Pull both ends of the original pipe, the front pulling speed is 4m / min, the rear pulling speed is 3m / min, the original pipe to be expanded is drawn into the rotating primary expansion rod and the original pipe is expanded, and the expansion rod and the original Put the tubes together into a 5°C water bath for cooling, and withdraw the first-stage expansion rod to obtain the first-stage expansion tube.

[0058] Heat a copper secondary conical expansion rod with a cone angle of 45°, a cone length of 20mm, an outer diameter of 8mm, and a length of 200mm to 100°C. Pull the two ends of the first-stage expansion tube, the front traction speed is 3m / min, and the rear traction speed is 2.2m / min, pull the first-stage expansion tube into the rotating second-lev...

Embodiment 2

[0063] Cut 150mm of thermoplastic polyurethane original pipe of φ3.0mm×0.5mm. Heat a copper primary conical expansion rod with a cone angle of 40°, a cone length of 20mm, an outer diameter of 4mm, and a length of 200mm to 100°C. Pull the two ends of the original pipe, the front traction speed is 4.6m / min, the rear traction speed is 3.5m / min, the original pipe to be expanded is drawn into the rotating primary expansion rod and the original pipe is expanded, and the expansion rod Put it into a 20°C water bath to cool down together with the original tube, withdraw the first-level expansion rod, and obtain the first-level expansion tube.

[0064] Heat a copper secondary conical expansion rod with a cone angle of 55°, a cone length of 20mm, an outer diameter of 6mm, and a length of 200mm to 110°C. Pull the two ends of the first-stage expansion tube, the front traction speed is 3m / min, the rear traction speed is 1.6m / min, pull the first-stage expansion tube into the rotating second...

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Abstract

The invention relates to a self-enhanced thin-wall miniature balloon and a manufacturing method of the self-enhanced thin-wall miniature balloon. The balloon is made of a thermoplastic elastomer, wherein the length of the balloon ranges from 12 mm to 22 mm, the outer diameter of the balloon ranges from 8 mm to 12 mm, and the ratio of annular strength to axial strength of the balloon is 1-2. A thermoplastic elastomer tube blank is dilated multiple times in the axial direction and the annular direction through a heating and dilating stick to obtain double-axis dilated orientation tube stock; a balloon die is arranged in an inner cavity of the double-axis dilated orientation tube stock, the two ends of the tube stock are pulled to stretch outwards after being heated, and then a balloon tube is obtained; the balloon tube is sleeved with a stainless steel gas tube, gas is fed into the balloon tube, the balloon tube is heated to expand, and the balloon is obtained after cooling and shaping. According to the method, a soft and hard embedded segment structure of the thermoplastic elastomer is utilized ingeniously, polymers are subjected to ordered orientation arrangement in the stress direction through multiple times of double-axis dilated orientation, hard segment phases form a paracrystalline or crystalline structure, the number of physical cross-links is increased, the tube stock is reinforced in the annular direction, and the tearing strength of the manufactured balloon is greatly enhanced.

Description

technical field [0001] The invention relates to the field of biomedical materials, and relates to a balloon and a preparation method thereof, in particular to a supporting instrument used in minimally invasive operations such as kyphoplasty to restore the height of the vertebral body and form a bone cement perfusion cavity through a working channel To provide a high-toughness, thin-walled vertebral body expansion balloon capable of forming a cavity in a compression fracture and a preparation method thereof. Background technique [0002] Vertebral fractures are clinically common diseases, mostly caused by fracture loosening, trauma and other reasons. Vertebral compression fractures can cause severe pain and neurological deficits in patients. Percutaneous vertebroplasty is a minimally invasive interventional treatment technique for osteoporotic vertebral fractures that has emerged with the development of minimally invasive surgery in recent years, such as figure 1 As shown, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/70
CPCA61B17/00234A61B17/8855
Inventor 刘昌胜洪华
Owner EAST CHINA UNIV OF SCI & TECH
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