Dextran-Loaded Biodegradable Matrix for Adhesion Barrier
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Solution Overview
Problem
Surgical adhesions pose significant complications following surgical procedures, leading to pain, infertility, bowel obstruction, and repeated surgeries, as existing methods fail to effectively prevent or treat adhesion formation at the surgical site.
Innovation Solution
A biodegradable matrix comprising dextran loaded in a range of 5% to 95% by weight, configured to release 20% to 90% of dextran within 24 to 48 hours, which is administered to the patient to form a porous matrix subjected to crosslinking, acting as an adhesion barrier to inhibit scar tissue growth and adhesion formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a matrix is designed to release dextran rapidly (20-90% within 24-48 hours), then adhesion inhibition effectiveness is improved, but the duration of adhesion barrier protection is reduced
Solution Approach 1:
The patent modifies the physical and chemical parameters of the matrix, including porosity, crosslinking density, and dextran molecular weight, to control the release rate. By adjusting these parameters, the matrix achieves both rapid initial release (20-90% within 24-48 hours) for effective adhesion inhibition and sustained release over extended periods for prolonged protection.
Solution Approach 2:
The patent creates a composite matrix system combining dextran with other biodegradable polymers and crosslinking agents. This composite structure enables controlled release kinetics where the matrix provides both immediate adhesion barrier formation through rapid dextran release and sustained protection through controlled degradation and secondary release over time.
2Reliability
If dextran is loaded at high concentration (5-95% by weight), then adhesion barrier effectiveness is improved, but matrix biodegradability and tissue integration are compromised
Solution Approach 1:
The patent optimizes the dextran loading concentration within the specific range of 5-95% by weight and adjusts the molecular weight and degree of crosslinking. These parameter modifications enable the matrix to maintain sufficient dextran for effective adhesion inhibition while preserving adequate biodegradability and tissue integration capabilities.
Solution Approach 2:
The patent creates spatial variation in dextran distribution within the matrix, with different regions providing different concentrations and release rates. This local quality variation allows certain areas to provide strong adhesion barrier protection while other areas maintain biodegradability and facilitate tissue ingrowth, resolving the contradiction between effectiveness and biodegradability.
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 dextran-based matrix effectively reduces, prevents, or treats adhesions by releasing dextran to inhibit cell migration and adhesion formation, providing a therapeutic effect that minimizes post-surgical complications and adhesion recurrence.
Implementation Method 1
a biodegradable matrix comprising dextran loaded in a range of 5% to 95% by weight, configured to release 20% to 90% of dextran within 24 to 48 hours
Implementation Method 2
forming a porous matrix subjected to crosslinking
Data Source
AI summary
Compositions and methods are provided for preparing an adhesion barrier that effectively reduce, prevent or treat adhesions in a patient in need thereof. In one embodiment, a matrix is provided comprising a biodegradable polymer and dextran loaded in the matrix in an amount of from about 5% to about 90% by weight based on a total weight of the matrix. The matrix is configured to release from about 30% to about 90% of the dextran loaded in the matrix within 24 to 48 hours.