Cutting Balloon Catheter Delamination Prevention
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Solution Overview
Problem
Angioplasty cutting balloon blades often experience delamination due to stress during procedures, which can lead to ineffective treatment and complications.
Innovation Solution
The design incorporates an expandable member with a cutting member and a covering that is fixedly attached to both the expandable member and the cutting member, using a thermoplastic polyurethane coating and fiber reinforcement to prevent delamination, and includes a mounting pad and attachment material to secure the cutting member in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cutting elements are mounted on the angioplasty balloon to enhance treatment effectiveness, then the ability to reduce re-stenosis is improved, but the structural integrity deteriorates due to delamination under stress
Solution Approach 1:
The patent employs a composite structure consisting of multiple layers: a balloon cuff layer, a mounting pad layer with cutting elements, and a reinforcing fiber layer. These composite materials work together to provide both the cutting function and structural integrity, preventing delamination while maintaining treatment effectiveness.
Solution Approach 2:
The cutting element assembly is segmented into distinct functional components: the balloon cuff, the mounting pad, the cutting edges, and the reinforcing fibers. This segmentation allows each component to perform its specific function while maintaining overall structural integrity through proper interface design.
2Productivity
If cutting elements are attached to the balloon surface, then cutting capability is enhanced, but the risk of delamination increases under procedural stress
Solution Approach 1:
The mounting pad serves as an intermediary layer between the balloon cuff and the cutting elements. This intermediate structure distributes mechanical stresses and provides a stable base for the cutting edges, reducing the risk of delamination while maintaining cutting capability.
Solution Approach 2:
The reinforcing fibers are preliminarily integrated into the mounting pad structure before the cutting elements are attached. This preliminary reinforcement prevents delamination from occurring in the first place during procedural stress, ensuring reliable cutting capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the structural integrity of the cutting balloon, reducing the likelihood of delamination and ensuring effective engagement with the target site during angioplasty procedures.
Implementation Method 1
a covering that is fixedly attached to both the expandable member and the cutting member
Data Source
AI summary
An example cutting balloon is disclosed. The example cutting balloon includes an expandable member having an outer surface and longitudinal axis, a first cutting member disposed along the outer surface of the expandable member and a covering encapsulating the expandable member and the first cutting member.