Microfluidic Chamber Layout for Homogeneous Cell Seeding
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Solution Overview
Problem
Existing microfluidic devices for cell suspension processing face challenges with input suspension dispersion, parameter heterogeneity, and inefficiency in bioproduction processes, leading to reduced efficiency, efficacy, and reproducibility, particularly in operations like filtration, seeding, amplification, and transduction.
Innovation Solution
A microfluidic device with a processing chamber comprising elongated segments, input and output seeding channels, and harvest channels, configured for serial flow and controlled shear rates, ensuring homogeneous seeding and efficient harvest through optimized channel geometries and connection channels, reducing the need for additional equipment like filters or centrifuges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing microfluidic devices are used for cell suspension processing, then processing capability is provided, but input suspension dispersion limits efficacy and accuracy
Solution Approach 1:
The processing chamber is divided into multiple elongated segments (first segment, second segment, etc.) that are serially connected. Each segment can be independently seeded through dedicated input seeding channels while maintaining homogeneous distribution throughout the entire chamber. This segmentation allows precise control of fluid flow and particle distribution in each region.
Solution Approach 2:
The invention introduces transverse flow components by configuring input seeding channels to inject fluid laterally into the processing chamber segments. This transverse dimension complemented by longitudinal flow through connection channels creates multi-directional mixing that eliminates input suspension dispersion and achieves uniform particle distribution.
2Productivity
If existing microfluidic devices are used, then processing is enabled, but parameter heterogeneity reduces efficiency and efficacy
Solution Approach 1:
The serial connection of elongated segments through connection channels creates continuous flow paths where fluid and particles move sequentially through each segment. This continuous action ensures that parameters such as flow rate, concentration, and shear stress remain consistent throughout the processing chamber, eliminating parameter heterogeneity while maintaining high bioproduction efficiency.
3Reliability
If existing microfluidic devices are used, then processing capacity is provided, but inter-batch reproducibility is compromised
Solution Approach 1:
Each elongated segment is equipped with dedicated input seeding channels and output seeding channels positioned at specific locations. This localized configuration ensures that each segment receives and discharges fluid under controlled conditions, making the system highly reproducible across batches while keeping individual flow control mechanisms simple and manageable.
4Productivity
If existing microfluidic devices are used, then processing is enabled, but reactant and particle efficiency is reduced
Solution Approach 1:
The device utilizes hydraulic flow control through precisely engineered connection channels and seeding channels to optimize fluid distribution. By controlling flow rates and pressure gradients hydraulically, the system achieves efficient particle transport and mixing while minimizing reactant consumption and maximizing bioproduction yield.
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
Enhances seeding efficiency by promoting high shear rates and homogeneity, while maintaining robust harvest capabilities, thus improving yield and reducing operational complexity and costs.
Implementation Method 1
Enhances seeding efficiency by promoting high shear rates and homogeneity
Implementation Method 2
the connection channel or plurality of connection channels being configured to allow the seeding flow through all the segments serially
Data Source
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AI summary
This microfluidic device, intended for processing particles, in particular cells, comprises a processing chamber with at least two elongated segments, one input seeding channel and one output seeding channel configured to define a seeding flow, and connection channels configured to allow the seeding flow through all the processing chambers serially.