Composite Barbed Suture Resists Peel Force
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Solution Overview
Problem
Monofilament barbed sutures used in cosmetic procedures face issues with filament weakening and barb detachment under high tension, leading to inadequate tissue engagement and wound security.
Innovation Solution
Development of filament-reinforced composite fibers comprising a plurality of filaments embedded with an adhesive matrix material and integral barbs, which can be used as sutures or incorporated into meshes, enhancing tissue engagement and wound closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If monofilament barbed sutures are used to engage tissue without knots, then ease of operation is improved, but reliability deteriorates due to filament weakening and barb detachment under high tension
Solution Approach 1:
The patent applies composite materials by combining multiple filaments with an adhesive matrix material to create a braided composite suture. This composite structure distributes mechanical loads across multiple filaments rather than concentrating stress on a single monofilament, thereby preventing filament weakening and barb detachment while maintaining the knotless barbed design for ease of operation
Solution Approach 2:
The patent segments the single monofilament into multiple individual filaments that are braided together. Each filament carries a portion of the total load, and the adhesive matrix binds them together to prevent relative movement. This segmentation allows the suture to maintain flexibility and ease of insertion while significantly improving resistance to tensile failure and barb detachment
2Ease of operation
If high loads and stresses are applied to a single filament during barb formation, then ease of operation is improved for tissue engagement, but strength deteriorates causing filament weakening and easy barb peeling
Solution Approach 1:
The patent uses composite materials consisting of multiple filaments bound by an adhesive matrix to distribute the high loads and stresses that occur during barb formation and subsequent tissue engagement. The composite structure prevents stress concentration on any single filament, maintaining both the ability to engage tissue effectively and the strength to resist filament weakening and barb peeling
Solution Approach 2:
By dividing the single high-load-bearing filament into multiple smaller filaments arranged in a braid, the patent reduces the stress each individual filament must withstand during barb formation. The adhesive matrix ensures these segmented filaments work together as a unified structure, maintaining overall strength while reducing the risk of any single filament failing under load
Data Source
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AI summary
Filament-reinforced composite fibers made from a plurality of filaments and a matrix are useful in forming medical devices such as sutures and meshes.