Hydrogel-Filled Fluid Channel System for Cell Culture
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Solution Overview
Problem
Current fluid channel systems for examining cells are too complex and unable to realistically replicate the conditions found in real tissue, particularly when examining cell growth, due to the small size of hydrogel structures used.
Innovation Solution
A fluid channel system with a chamber that is at least 90% filled with photopolymerized hydrogel, where the chamber is exclusively connected to fluid channels through two openings, allowing for realistic simulation of interstitial pressure and particle penetration, thereby mimicking tissue conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If small hydrogel columns or microspots are used in fluid channels, then the channel structure can be designed very simply, but the structure is too small to realistically reproduce the conditions in real tissue
Solution Approach 1:
The device is divided into distinct functional components: a simple fluid channel structure and separate hydrogel chambers that can be independently sized and configured. This segmentation allows the channel to remain simple while the chambers provide realistic tissue-scale environments for cell growth.
Solution Approach 2:
The invention transitions from one-dimensional fluid channels to three-dimensional hydrogel chambers that can be substantially filled with cells and extracellular matrix. This dimensional expansion enables realistic reproduction of tissue conditions while maintaining simple channel connectivity through openings.
2Reliability
If larger hydrogel sections are used to realistically reproduce tissue conditions, then the representation of real tissue improves, but the system becomes relatively complicated requiring filling openings and surface tension elements
Solution Approach 1:
The fluid channel and hydrogel chamber are merged into an integrated structure where the chamber is formed as an extension of the channel. This eliminates the need for separate filling openings and surface tension elements, as the chamber is directly accessible through the channel openings.
Solution Approach 2:
The complex elements (filling openings, surface tension structures) are extracted and eliminated from the system. The chamber is designed to be filled and accessed directly through the fluid channel openings, removing the need for additional complex components.
3Volume of stationary object
If hydrogel is introduced into chambers through filling openings, then larger hydrogel sections can be provided, but the chamber must be designed to hold liquid hydrogel solely by surface tension
Solution Approach 1:
Instead of designing chambers that passively hold hydrogel by surface tension, the invention inverts the approach by allowing hydrogel to be introduced and contained through active fluid channel connections. The chamber is filled through openings from the fluid channel, reversing the traditional filling mechanism.
Solution Approach 2:
The fluid channel openings serve multiple functions: they act as filling openings, connection points for fluid flow, and structural integration points between the channel and chamber. This multi-functionality eliminates the need for dedicated filling openings and complex sealing mechanisms.
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
This design provides a simplified yet realistic environment for cell growth studies, allowing for the simulation of tissue conditions and efficient particle penetration, enabling more accurate cell growth and migration analysis.
Implementation Method 1
a chamber which is at least 90%, in particular at least 95%, in particular completely filled with at least one photopolymerized hydrogel and/or a polymerized photodepolymerizable hydrogel
Data Source
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AI summary
The present invention relates to a fluid channel system for examining cells, comprising a chamber that is filled to at least 90%, and in particular completely, with at least one photopolymerized hydrogel and/or a polymerized photodepolymerizable hydrogel. The chamber is open to at least one fluid channel via at least two openings, wherein the at least one fluid channel and the chamber are each formed as a cavity in a substrate, and wherein each fluid channel has two openings to the outside.The present invention further relates to a fluid channel system for examining cells, comprising a cavity in a substrate, wherein at least one photopolymerized hydrogel and/or one polymerized photodepolymerizable hydrogel is arranged in the cavity, the hydrogel being structured such that at least one fluid channel and a continuous hydrogel structure are formed, wherein the hydrogel structure borders the at least one fluid channel at two separate surface areas and has a connection to the outside exclusively via the at least one fluid channel.