Modular Millifluidic Culture Chambers With Interchangeable Membranes
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Solution Overview
Problem
Existing cell culture devices lack modularity, ease of use, and simplicity in manufacturing, while also requiring complex reassembly for changing experimental conditions.
Innovation Solution
A millifluidic device with modular, independently extractable culture chambers, optically accessible, and equipped with interchangeable membranes and electrodes, allowing seamless switching of experimental setups without full disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If culture chambers are made independent and isolated like a perfusion circuit, then each chamber can be separately controlled and monitored, but the device complexity increases due to multiple connection points and sealing requirements
Solution Approach 1:
The device is divided into independent culture chambers that can be separately controlled and monitored. Each chamber functions as an isolated unit within the perfusion circuit, allowing individual manipulation while maintaining overall system integration through standardized connection interfaces.
Solution Approach 2:
The connection points and sealing mechanisms are designed with universal interfaces that can accommodate different chamber configurations. The bypass system uses standardized connectors that work across multiple chambers, reducing the complexity that would otherwise arise from custom connection solutions for each chamber.
2Measurement precision
If chambers are optically accessible for microscopy inspection, then cell culture monitoring is enabled, but the device structure becomes more complex requiring transparent materials and optical pathways
Solution Approach 1:
The device utilizes transparent and translucent materials that allow optical inspection of cell cultures. The chamber walls and membranes are selected for their optical properties, enabling standard and confocal microscopy without requiring complex optical windows or specialized viewing ports.
Solution Approach 2:
The optical accessibility is integrated into the basic chamber structure rather than being an add-on feature. The same transparent materials serve both structural containment and optical viewing functions, eliminating the need for separate optical pathway components.
3Ease of operation
If culture chambers are extractable and reusable, then ease of use improves for cell seeding and device reuse, but manufacturing precision requirements increase to ensure proper reassembly and sealing
Solution Approach 1:
The culture chambers are designed as separate, extractable modules that can be removed and reinserted into the device body. This segmentation allows individual chambers to be prepared, sterilized, and assembled independently, reducing the precision requirements compared to integrating all components as a single unit.
Solution Approach 2:
Connection features such as positioning protrusions, alignment guides, and pre-formed sealing surfaces are incorporated into the chamber and body designs before assembly. These preliminary structural features guide proper reassembly and ensure consistent sealing without requiring high-precision manual alignment during operation.
4Adaptability or versatility
If membranes with different porosity and materials are used, then adaptability for different cell types improves, but manufacturing complexity increases due to multiple membrane types
Solution Approach 1:
The membrane support structure and connection interfaces are designed to accommodate multiple membrane types with different porosity and material properties. A universal mounting system allows polycarbonate, PET, PVC, PTFE, PDMS, cellulose acetate, polyester, polystyrene, and nylon membranes to be interchangeably installed without requiring different structural components.
Solution Approach 2:
The system allows selection of membranes with varying parameters including porosity, material composition, and thickness to match specific cell culture requirements. This parameter variability is achieved through a standardized interface that accepts different membrane specifications without compromising the overall device manufacturing process.
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
Enables advanced cell and bacterial cultures in various configurations, including 2D and 3D, with optical and electrical monitoring, facilitating easy manipulation and reuse, and supporting diverse biological assays.
Implementation Method 1
The chambers host a membrane, which separates them into two half-chambers, of a permeable or, semi-permeable type with different porosity
Implementation Method 2
a membrane, which separates them into two half-chambers, of a permeable or, semi-permeable type with different porosity
Implementation Method 3
The device is optically accessible with standard optical microscopy and in phase-contrast, both straight and inverted, both in white light and fluorescent light
Implementation Method 4
The device can be manufactured both in the absence and presence of electrodes, which are useful for measuring electrical parameters relevant to cellular and bacterial behaviour and for electrically stimulating cellular or bacterial cultures
Data Source
AI summary
A millifluidic device for cultures of biological agents includes a main body having a first hole closed at the bottom, a separator a membrane fixed to the separator, and a plug closing the first hole. The separator is designed to be placed in the first hole and is extractable from the first hole. The membrane divides the first hole into an upper half-chamber and a lower half-chamber. A pair of tubes perfuse the lower half-chamber and another pair of tubes perfuse the upper half-chamber. A first slide is placed centrally on the plug and a second slide is placed centrally on the first hole. A cylindrical body rises from the first hole and the second slide is placed on the top of the cylindrical body. The cylindrical body has a second hole, coaxial to the cylindrical body.