Fish Collagen Sponge for Local Antibiotic Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current collagen-based hemostatic dressings face challenges such as allergic reactions, insufficient tissue penetration of antibiotics, and poor handling characteristics, particularly with collagen derived from mammals, which can lead to systemic toxicity and inadequate local antibiotic delivery in surgical wounds.
Innovation Solution
A degradable collagen sponge with high porosity and controlled release properties, using type I collagen from freshwater fish, crosslinked with carbodiimide, and combined with nanofiber layers for enhanced antibiotic delivery and stability, allowing for sustained release of antibiotics like vancomycin, gentamicin, and other active substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mammalian collagen is used in hemostatic dressings, then hemostatic function is achieved, but allergic reactions and systemic toxicity occur
Solution Approach 1:
The patent changes the source parameter of collagen from mammalian to fish origin, fundamentally altering the immunogenicity parameter while maintaining the hemostatic function. This substitution resolves the contradiction by selecting a biologically different but functionally equivalent material source.
Solution Approach 2:
The patent employs a disposable, single-use collagen sponge that is discarded after one application. This eliminates the need for repeated use of potentially allergenic materials and ensures that any immune response does not develop into chronic sensitization, effectively managing the allergic reaction risk.
2Reliability
If antibiotics are administered systemically, then infection prevention is achieved, but systemic toxicity occurs
Solution Approach 1:
The patent applies antibiotics locally at the wound site through the collagen sponge rather than systemically. The sponge delivers high concentrations of antibiotic directly where needed, achieving effective infection prevention while avoiding the systemic circulation and associated toxicity. This localizes the therapeutic effect precisely to the surgical wound.
Solution Approach 2:
The collagen sponge acts as an intermediary carrier that delivers antibiotics directly to the wound site. This mediator enables localized drug delivery, preventing the antibiotic from entering systemic circulation while still achieving the desired anti-infective effect at the target location.
3Reliability
If antibiotic concentration is increased for effective treatment, then infection prevention improves, but tissue penetration becomes insufficient
Solution Approach 1:
The patent segments the antibiotic delivery process into controlled stages through the sponge matrix. The sponge structure with its porous network allows gradual release and progressive tissue penetration, breaking down the single-dose high-concentration approach into sustained lower-concentration delivery that effectively penetrates tissues over time.
Solution Approach 2:
The patent employs dynamic, time-dependent antibiotic release from the sponge rather than static immediate release. The sponge gradually releases antibiotic molecules over several days, adapting the delivery rate to match tissue absorption and penetration needs, thereby achieving effective tissue penetration without requiring excessively high initial concentrations.
4Quantity of substance
If collagen sponge porosity is increased for drug loading, then antibiotic capacity improves, but structural stability decreases
Solution Approach 1:
The patent uses composite collagen sponge material that combines high porosity for drug loading with cross-linking agents or structural modifications to maintain integrity. The composite structure allows the sponge to simultaneously achieve high antibiotic capacity through porous architecture and sufficient structural stability through molecular cross-linking or reinforcement, resolving the contradiction between porosity and strength.
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 sponge provides effective local antibiotic delivery with reduced systemic toxicity, improved handling, and controlled degradation, ensuring prolonged antibiotic release and reduced risk of allergic reactions, making it suitable for surgical and postoperative wound management.
Implementation Method 1
chemical crosslinking with carboimide-based compounds commonly used in collagen chemistry
Implementation Method 2
Using the lyophilization process, it is possible to further create a three-dimensional material with a given porosity
Implementation Method 3
Collagen material can also be prepared in the form of nanofiber layers by electrospinning
Implementation Method 4
The drug can be incorporated into the collagen directly into the solution before the given processing procedures or by additional impregnation of the ready material with a solvent
Implementation Method 5
controlled-elution drug carriers
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a highly porous collagen sponge. The invention further relates to a degradable sandwich collagen sponge which comprises a low porous collagen core and a highly porous collagen sponge as peripheral parts, with haemostatic effects, controlled degradation time and capable of controlled local release of active substances, e.g., antibiotics, for use in the form of wound dressings in surgery, orthopedics, traumatology and plastic surgery. The invention also relates to a collagen composite in which at least one layer of highly porous collagen sponge alternates with at least one layer of collagen fibers. The invention further relates to a method of preparation of a sandwich sponge and a collagen composite.