Injectable Gellan Gum Gel for Sustained Tissue Elevation
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Solution Overview
Problem
Existing medical procedures face challenges in maintaining tissue elevation during resection due to the rapid dissipation of injected fluids, and viscous alternatives are costly and prone to breaking down, necessitating frequent re-injection.
Innovation Solution
A biocompatible gel composition formed from gellan gum, water, and a salt is prepared to form a continuous three-dimensional network, which is injected through a needle to maintain tissue elevation during procedures like EMR and ESD.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If saline or similar fluids are injected to elevate tissue, then tissue separation is achieved, but the fluid dissipates quickly requiring periodic re-injection
Solution Approach 1:
The patent changes the physical and chemical parameters of the injection solution by using a concentrated gel composition (e.g., 10-20% w/v hydroxyethyl cellulose) instead of dilute saline, thereby extending the duration of tissue elevation from minutes to hours while maintaining procedural efficiency
Solution Approach 2:
The patent employs composite gel formulations combining hydroxyethyl cellulose with other polymers or additives to create a material that provides sustained tissue elevation without rapid dissipation, resolving the contradiction between duration and efficiency
2Duration of action of moving object
If more viscous injection solutions are used to extend duration, then tissue elevation is maintained longer, but the solutions are costly and difficult to inject
Solution Approach 1:
The gel composition exhibits dynamic rheological properties, remaining injectable through standard needles despite high viscosity, and then setting to a firm gel upon injection to provide sustained tissue elevation
Solution Approach 2:
The patent optimizes the concentration and molecular weight of hydroxyethyl cellulose to achieve a balance between viscosity for prolonged duration and injectability through standard medical needles
3Duration of action of moving object
If more viscous injection solutions are used to extend duration, then tissue elevation is maintained longer, but the solutions break down too soon after injection
Solution Approach 1:
The patent uses composite gel formulations that combine hydroxyethyl cellulose with crosslinking agents or other polymers to enhance structural integrity and prevent premature breakdown while maintaining extended duration of tissue elevation
Solution Approach 2:
The patent adjusts gel composition parameters including polymer concentration, molecular weight distribution, and crosslinking density to optimize both duration of action and structural reliability
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 gel composition provides sustained tissue elevation, minimizing the need for re-injection and maintaining structural integrity during medical procedures, enhancing procedural efficiency and reducing material costs.
Implementation Method 1
heating the mixture; introducing the mixture into a reservoir; and allowing the mixture to cool while inside the reservoir to form a gel having a continuous, three-dimensional structure inside the reservoir
Implementation Method 2
heating the mixture may sterilize the mixture, such that the gel formed inside the reservoir is sterilized. For example, the mixture may be heated at or to a temperature of about 121° C. while inside the reservoir
Data Source
AI summary
Compositions useful for tissue resection procedures and related methods of preparing the compositions are discussed. The composition may comprise gellan gum, at least one salt, and water. In some aspects, the composition may be prepared by combining the gellan gum, the salt(s), and the water to form a mixture, heating the mixture, introducing the mixture into a reservoir, and allowing the mixture to cool while inside the reservoir to form a gel. The gel may have a continuous, three-dimensional structure, and may be solid or quasi-solid. The composition may be biocompatible and injectable from the reservoir through a needle coupled to the reservoir to the target site of a patient.