Sprayable PLCL Tissue Adhesive With Tunable Biodegradation
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Solution Overview
Problem
Current hydrogel-based adhesion barriers are difficult to apply, lack flexibility, degrade too quickly, and impede wound healing, making them ineffective in preventing post-surgical adhesions.
Innovation Solution
A sprayable tissue adhesive composed of a blend of 40 k and 5 k poly(L-lactide-co-caprolactone) (PLCL) fibers, applied via solution blowspinning, which degrades at a rate matching tissue healing and provides viscoelasticity and tunable biodegradation to prevent adhesions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If hydrogel-based adhesion barriers are used, then adhesion prevention is achieved, but the material degrades too quickly to effectively prevent adhesions during the critical 5-day maturation period
Solution Approach 1:
The patent modifies the degradation parameters of the barrier material by adjusting polymer composition, molecular weight, and crosslinking density to achieve a degradation rate that matches the critical 5-day adhesion maturation period, preventing adhesions while maintaining structural integrity throughout the protection period
Solution Approach 2:
The patent employs composite material systems combining hydrogel networks with reinforcing fibers or particles to create a barrier that degrades at a controlled rate, maintaining mechanical strength and adhesion prevention capability throughout the critical healing period
2Reliability
If pre-fabricated hydrogel films are used, then adhesion barrier function is provided, but the material is brittle and difficult to apply to geometrically complex tissue surfaces
Solution Approach 1:
The patent develops flexible thin-film hydrogel barriers with enhanced elastomers or polymer blends that can conform to complex tissue geometries while maintaining adhesion prevention function, eliminating the brittleness of traditional pre-fabricated films
Solution Approach 2:
The patent creates dynamically adaptable barrier materials that can deform and conform to irregular tissue surfaces during application, then stabilize to provide effective adhesion protection, improving ease of application to complex geometries
3Stability of the object's composition
If chemically crosslinked hydrogels are used to mimic tissue stiffness, then biocompatible interfacing is achieved, but the materials swell causing undue pressure on surrounding tissue
Solution Approach 1:
The patent adjusts the crosslinking density, polymer composition, and network architecture of the hydrogel to match tissue stiffness while controlling water uptake and swelling, preventing undue pressure on surrounding tissues during the adhesion prevention period
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 PLCL blend effectively reduces adhesion formation and severity by eroding at a controlled rate, maintaining mechanical properties and promoting wound healing without impeding the process, as demonstrated in a preclinical mouse model.
Implementation Method 1
A sprayable tissue adhesive composed of a blend of 40 k and 5 k poly(L-lactide-co-caprolactone) (PLCL) fibers, applied via solution blowspinning, which degrades at a rate matching tissue healing
Implementation Method 2
applied via solution blowspinning
Implementation Method 3
applied via solution blowspinning
Implementation Method 4
provides viscoelasticity and tunable biodegradation to prevent adhesions
Data Source
AI summary
Provided are compositions and methods that involve viscoelastic poly(lactide-co-caprolactone) (PLCL) mixtures for use in wound healing. The PLCL mixtures provide an improved anti-fibrotic yet tissue-adhesive polymer sealant. The PLCL mixtures can be applied to a variety of wounds arising from surgical and non-surgical tissue damage.