Flocked Surgical Suture for Knotless Wound Closure Strength
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Solution Overview
Problem
Conventional surgical sutures face challenges in achieving secure wound closure without knotting, which can lead to increased scarring, dehiscence, and foreign-body reactions, while barbed sutures may weaken mechanical stability due to reduced suture diameter.
Innovation Solution
A surgical suture utilizing flocking technology to increase surface friction, allowing for knotless wound closure with self-fixating properties without compromising mechanical strength, and potentially incorporating pharmaceutical agents or cells for enhanced healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sutures are used with multiple knots to achieve secure wound closure, then wound closure security is improved, but foreign-body reactions and scarring increase due to large amount of suture material in wound zone
Solution Approach 1:
The invention extracts the knotting function from the suture system by introducing barbed structures that provide self-fixating properties. The barbs are cut into the suture body at spaced intervals, allowing the suture to anchor itself in tissue without requiring multiple knots, thereby reducing foreign material in the wound zone while maintaining closure security
Solution Approach 2:
The invention changes the physical parameters of the suture by drawing it to reduce diameter before generating barbs. This parameter change allows the suture to maintain adequate mechanical strength despite the reduction in diameter caused by barb formation, resolving the contradiction between secure closure and minimal foreign-body reaction
2Object-affected harmful factors
If barbed sutures are used to achieve knotless wound closure, then foreign material input is reduced, but mechanical stability is weakened due to reduced suture diameter
Solution Approach 1:
The suture is drawn to reduce its diameter before the barbs are generated. This preliminary action of drawing the suture ensures that the base material has optimized mechanical properties before the barbs are formed, allowing the final suture to maintain adequate strength despite the diameter reduction caused by barb formation
Solution Approach 2:
The suture comprises a composite structure with a suture body and barbs formed as integral parts. The barbs are generated by cutting into the suture body material itself, creating a composite structure that provides both the flexibility of a continuous suture and the anchoring function of discrete barbs, maintaining mechanical stability while reducing foreign-body reactions
3Object-affected harmful factors
If suture diameter is reduced to minimize foreign material in wound zone, then foreign-body reactions are decreased, but mechanical strength is compromised
Solution Approach 1:
The suture is drawn to reduce diameter before barbs are generated, optimizing the base material properties. This preliminary drawing action ensures that even though the final suture with barbs has reduced diameter, the mechanical strength is maintained through the optimized material structure established before barb formation
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
The flocking suture achieves secure wound closure with reduced foreign material input, improved knot security, and maintained mechanical strength, while also enabling controlled drug release and tissue integration, particularly beneficial for sensitive areas like arteries.
Implementation Method 1
Flocking a surgical suture is associated with an enlargement of the suture's surface. This advantageously increases friction forces onto the suture requiring less knotting in order to achieve a secure fixation of the suture.
Implementation Method 2
The surgical suture additionally comprises an adhesive layer, in particular a cured or solidified adhesive layer... the flock material is attached to the adhesive layer
Data Source
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AI summary
The invention concerns a surgical suture comprising a suture body and a flock material, methods for manufacturing the surgical suture and a surgical combination comprising along the surgical suture at least one surgical needle.