Balloon Dilation Catheter Blends for Puncture Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing valve balloons for percutaneous balloon valvuloplasty have low puncture resistance and high compliance, which can lead to tearing or damage during surgery due to their bulky size and calcified aortic valve conditions.
Innovation Solution
A balloon dilatation catheter made of a blend of L25, TR55, TR90, or TR70 nylon materials, optionally with specific weight ratios and a multi-layer structure, to enhance puncture resistance and reduce compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a single high-specification nylon material is used for the balloon, then the balloon can achieve a relatively large size (8.0 mm to 50.0 mm diameter), but the balloon has relatively low puncture resistance and high compliance which may tear the valve or damage the stent structure
Solution Approach 1:
The patent applies composite materials by blending at least two different nylon materials (such as nylon 12 and nylon 66, or different grades of nylon 12 like L25 and TR55) to create a balloon material that simultaneously achieves high puncture resistance and controlled compliance. The composite nylon material combines the advantages of different materials: one providing puncture resistance and the other providing appropriate compliance, thereby resolving the contradiction between strength and volume properties.
2Volume of moving object
If the balloon size is increased to treat aortic valve stenosis, then the balloon can adequately dilate the stenotic vessel, but the compliance becomes too high which may tear the valve during over-expansion
Solution Approach 1:
The composite nylon material combines materials with different mechanical properties where one material contributes to puncture resistance and the other to compliance control. This allows the balloon to maintain adequate size for dilating stenotic vessels while preventing excessive expansion that could tear the valve, thereby ensuring both effectiveness and safety.
Solution Approach 2:
The patent changes the material parameters by selecting specific nylon materials with different grades and properties (such as different crystallinity, molecular weight, or glass transition temperatures). By adjusting the composition ratio and material selection, the balloon's compliance parameter is optimized to prevent over-expansion damage while maintaining the necessary size for effective valve dilation.
3Volume of moving object
If the balloon is made larger to facilitate valve stent implantation, then the stenotic vessel can be adequately dredged, but the high compliance may bring damages to the valve stent structure during post-dilatation
Solution Approach 1:
The composite nylon material provides a balance between balloon size and compliance control. The material composition is designed so that the balloon can reach adequate size for vessel dilation and stent implantation, while the controlled compliance prevents excessive radial force that could damage the stent structure during post-dilatation procedures.
Data Source
AI summary
A balloon dilation catheter, a balloon (10) and preparation method therefor. The balloon (10) is prepared by co-mixing at least two of L25, TR55, TR90, and TR70, and has high puncture resistance and low compliance with respect to a balloon (10) made of a single nylon material. The balloon (10) is preferably a hollow multilayer structure, and the puncture resistance of the balloon (10) can be further improved and the compliance can be further reduced with respect to a single-layer structure.