Thermosensitive Hydrogel Composition for Prolonged Tissue Adhesion Prevention
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Solution Overview
Problem
Existing antiadhesive materials, such as non-biodegradable polymers cause inflammation and require reoperation, while biodegradable polymers have low adhesion prevention efficacy due to rapid dissolution and insufficient mechanical strength, making them unsuitable for prolonged adhesion prevention and vector applications.
Innovation Solution
A composition comprising an amino acid-modified polymer and a carboxypolysaccharide, optionally with a metal ion, which enhances mechanical strength, adhesiveness, and drug delivery efficacy by forming a stable hydrogel at body temperature, providing prolonged adhesion prevention and vector capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-biodegradable polymers are used as adhesion barriers, then adhesion prevention ability is improved, but biocompatibility deteriorates causing inflammation and requiring reoperation
Solution Approach 1:
The invention changes the key parameter of polymer degradability from non-biodegradable to biodegradable, while maintaining adhesion prevention ability through controlled degradation rates and optimized polymer structure. This resolves the contradiction by allowing the material to provide sustained protection initially, then gradually degrade to avoid long-term inflammatory responses.
Solution Approach 2:
The invention uses composite polymer structures combining different biodegradable polymer components with complementary properties. The composite structure provides both the mechanical strength needed for adhesion prevention and the biocompatibility of natural degradation products, eliminating the need for surgical removal.
2Object-affected harmful factors
If biodegradable polymers are used as adhesion barriers, then biocompatibility is improved, but adhesion prevention ability deteriorates due to rapid dissolution
Solution Approach 1:
The invention optimizes degradation parameters by controlling polymer molecular weight, crosslinking density, and crystallinity to achieve controlled degradation rates. This allows the polymer to maintain structural integrity and adhesion prevention ability for the required duration while ensuring complete biodegradation afterward, resolving the contradiction between sustained performance and biocompatibility.
3Reliability
If film/sheet-type adhesion barriers are used, then adhesion prevention is improved, but ease of operation deteriorates in emergency and complicated surgical conditions
Solution Approach 1:
The invention transforms the static film/sheet structure into a dynamic system that can change form according to surgical needs. The polymer composition can be applied as liquid, gel, or spray that adapts to complex anatomical structures, then sets in place to provide effective adhesion prevention. This dynamic approach resolves the contradiction between maintaining protective function and enabling easy application in various surgical scenarios.
Solution Approach 2:
The invention changes the physical state parameter of the adhesion barrier from solid film to liquid/gel/spray forms that can be easily applied. These fluid forms can penetrate and coat complex, microscopic, and tubular structures that solid films cannot reach, while still providing effective adhesion prevention after setting. This resolves the handling difficulty in emergency and complicated surgical conditions.
4Ease of operation
If gel-type adhesion barriers are used, then ease of operation is improved, but mechanical strength deteriorates resulting in early absorption
Solution Approach 1:
The invention optimizes the gel formulation by adjusting polymer concentration, molecular weight distribution, and crosslinking characteristics to achieve the desired balance. The gel maintains sufficient mechanical strength to resist early absorption and dissolution while preserving ease of application. This resolves the contradiction between operational convenience and structural integrity by carefully controlling the gel's rheological and mechanical properties.
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 composition achieves prolonged adhesion prevention up to 16 days, improved mechanical strength, and effective drug delivery without adverse effects, suitable for various surgical sites including endoscopic surgeries.
Implementation Method 1
amino acid-modified polymer... which enhances mechanical strength, adhesiveness, and drug delivery efficacy by forming a stable hydrogel at body temperature
Implementation Method 2
tissue adhesion prevention... introducing a physical barrier between the damaged tissue and adjacent tissues
Data Source
Figure 1
Figure 2A~2F
Figure 2G~2K
AI summary
The present invention relates to a composition comprising an amino acid-modified polymer, a carboxypolysaccharide, and may further include a metal ion for anti-adhesion and vector application. More specifically, the invention relates to a thermosensitive composition having enhanced mechanical and improved water-erosion resistant properties for efficiently preventing tissue adhesions and can serve as a vector with bio-compatible, bio-degradable/absorbable, and in-vivo sustainable properties.