Inflatable Balloon With Braided Layer For Predictable Folding
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Solution Overview
Problem
Medical balloons used in procedures like PTCA and stent delivery face challenges in predictable folding, as existing reinforcement materials can impede folding behavior and result in inconsistent collapse configurations.
Innovation Solution
The development of a composite balloon structure with varying stiffness regions, achieved by arranging composite elements or adding stiffening members to the balloon wall, and varying the properties of the fabric or braid to create distinct tension elements that promote predictable folding along flexible regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If reinforcement materials are added to the balloon wall to increase strength, then the balloon's mechanical strength is improved, but the folding predictability deteriorates
Solution Approach 1:
The patent applies local quality by creating regions of varying stiffness within the balloon wall through non-uniform braid construction. Different sections of the braid have different yarn densities, angles, or compositions, allowing specific areas to be more flexible for folding while maintaining overall structural strength. This resolves the contradiction by making the reinforcement properties spatially variable rather than uniform throughout the entire balloon wall.
Solution Approach 2:
The patent employs composite materials by combining multiple yarn types with different mechanical properties within the braid structure. This includes using a mixture of flexible and stiff fibers, or combining materials with different elastic moduli, to create a composite reinforcement layer that simultaneously provides strength and controlled flexibility for predictable folding behavior.
2Stability of the object's composition
If inelastic filaments are used to reinforce the balloon, then the balloon's structural integrity is improved, but the folding behavior becomes inconsistent
Solution Approach 1:
The patent applies segmentation by dividing the reinforcement structure into discrete braid segments or zones with different properties. Rather than using a single continuous layer of inelastic filaments throughout, the balloon wall incorporates segmented reinforcement sections that can fold independently or in coordinated patterns, improving folding consistency while maintaining overall structural integrity.
Solution Approach 2:
The patent applies dynamics by designing the braid structure to transition from a static, rigid reinforcement to a dynamic system that adapts its stiffness during folding. The braid construction allows for controlled deformation through mechanisms such as yarn slippage, angle changes, or phase transitions in the material, enabling consistent folding behavior while preserving structural integrity when inflated.
3Ease of manufacture
If a uniform braid structure is used throughout the balloon wall, then manufacturing simplicity is maintained, but folding predictability deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring the braid structure with predetermined folding patterns during manufacturing. The non-uniform braid is constructed with specific yarn arrangements, densities, or orientations that are designed in advance to guide the folding behavior during use. This preliminary structuring ensures predictable folding without requiring complex real-time control or post-manufacturing adjustments.
Data Source
AI summary
A balloon for medical treatments such as percutaneous transluminal coronary angioplasty (PTCA), delivery of a vascular stents or stent grafts, employs reinforcement materials that are patterned so as to promote consistent folding of the balloon. Also disclosed are methods and apparatus for biocidal treatment using a balloon, including balloons with fiber fabric reinforcements.