Microfluidic Device Asymmetric Flow Path for Flat Gel Surface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional microfluidic devices excel in mimicking in vivo conditions by controlling the size, shape, and oxygen concentration of the cell culture environment but lack the ability to form a flat gel surface for cell seeding and observation. In contrast, devices with cell culture inserts can create observable flat gel surfaces but fail to leverage the advantages of microfluidic devices.
Innovation Solution
A microfluidic device with a plate-shaped main body featuring a first flow path that widens from the bottom to the top, allowing for cell seeding on the top surface of a gel and enabling a flat gel surface for observation. The device includes first flow path ports and side walls that act as enlarged parts, increasing the flow path width towards the top surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a conventional cell culture insert is used, then a flat gel surface for cell seeding and observation can be constructed, but the advantages of microfluidic devices (controlling size, shape, and oxygen concentration close to in vivo conditions) cannot be adopted
Solution Approach 1:
The device is divided into multiple chambers: a first chamber for forming the gel matrix and a second chamber for cell seeding and culture. This segmentation allows the gel formation process to occur in a controlled microfluidic environment while providing a separate accessible chamber for cell seeding on a flat surface, thus resolving the contradiction between microfluidic control and flat surface availability
Solution Approach 2:
The invention transitions from a single-chamber two-dimensional culture system to a multi-chamber three-dimensional system. The first chamber provides the 3D microfluidic environment for gel formation, while the second chamber provides a 2D flat surface for cell seeding and observation, effectively combining both requirements in different spatial dimensions
2Adaptability or versatility
If a microfluidic device is used, then the size, shape, and oxygen concentration of the cell culture environment can be made close to in vivo conditions, but a flat gel surface for cell seeding and observation cannot be constructed
Solution Approach 1:
The device separates the gel formation function (first chamber with microfluidic control) from the cell culture function (second chamber with flat surface), allowing each chamber to be optimized for its specific purpose without compromise
Solution Approach 2:
The gel matrix itself acts as an intermediary between the two chambers, formed in the first chamber under microfluidic control and then serving as the substrate for cell seeding in the second chamber, thus transferring the benefits of both systems
3Device complexity
If the flow path width is constant, then the device structure is simple, but a space cannot be maintained above the gel for cell seeding
Solution Approach 1:
The flow path is designed with asymmetric width variation: narrower at the gel formation region and wider at the cell seeding region. This asymmetric design creates the necessary space above the gel for cell seeding while maintaining structural efficiency, avoiding the need for a completely complex uniform wide structure
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 configuration allows for effective cell seeding on the top surface of the gel and provides excellent observability due to the formation of a flat gel surface, while also maintaining the advantages of a microfluidic device in simulating in vivo conditions.
Implementation Method 1
a sol is injected into a region below the enlarged part in the first flow path, and a top surface of a gel obtained by solidifying the sol
Data Source
AI summary
A microfluidic device includes: a plate-shaped main body having a first principal surface and a second principal surface facing each other in a first direction; a first flow path formed inside the main body and extending along a plane between the first principal surface and the second principal surface; and a plurality of first flow path ports extending in the first direction and each having one end open to an end of the first flow path and another end open to the second principal surface, wherein the first flow path has an enlarged part so that a flow path width increases from a first principal surface side toward a second principal surface side when the first flow path is viewed in its extension direction.