Particle Suspension Channel Handling for Homogeneous Cell Dosing
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Solution Overview
Problem
Current methods for handling particle suspensions, particularly in biopharmaceutical industries, face challenges with accuracy and yield due to particle aggregation, sedimentation, and loss of homogeneity, leading to variable and often poor results in cell suspension handling.
Innovation Solution
A device with a compacted channel of specific cross-section and a pumping unit using a separated driving fluid, controlled by monitoring the interface position, to minimize sedimentation and enhance inertial lift effects for efficient mixing and resuspension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ordinary reservoirs and tubing are used for particle suspension handling, then the device complexity is low and ease of operation is high, but particle aggregation and sedimentation occur leading to poor yield and inaccuracy
Solution Approach 1:
The device segments the particle suspension handling into distinct functional zones within the channel: a compaction zone that limits sedimentation height, a mixing zone that enhances homogeneity, and a transfer zone that maintains controlled flow. This segmentation prevents particle aggregation while maintaining manageable device complexity through modular functional design.
Solution Approach 2:
The invention transitions from conventional three-dimensional reservoirs to a two-dimensional channel system with controlled cross-section. By constraining particle suspension to flow through a planar channel with limited height, sedimentation is physically restricted to a thin layer, preventing aggregation while maintaining ease of operation through a flattened geometric approach.
2Manufacturing precision
If conventional handling methods are used, then simplicity of use is maintained, but accuracy of cell dosing deteriorates due to variable particle distribution
Solution Approach 1:
The device changes critical geometric parameters of the channel, specifically the cross-sectional dimensions and compaction ratio, to optimize particle suspension behavior. By controlling channel height and length ratios, the system achieves accurate particle dosing through physical constraints rather than complex operational procedures, maintaining simplicity while improving precision.
Solution Approach 2:
The invention replaces manual mixing and homogenization operations with inertial lift effects generated by controlled fluid flow through the compacted channel. This mechanical substitution eliminates the need for external mixing devices or complex operational steps while achieving consistent particle distribution and accurate dosing automatically.
3Stability of the object's composition
If standard channel dimensions are used, then ease of manufacture is high, but particle sedimentation increases leading to heterogeneous output
Solution Approach 1:
The channel design applies local quality by creating specific geometric features at critical locations: a compacted section with reduced cross-section where sedimentation must be limited, and expanded sections where mixing occurs. This localized geometric variation maintains suspension homogeneity without requiring complex manufacturing throughout the entire channel, balancing manufacturability with performance.
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 solution significantly improves the yield and accuracy of particle suspension handling by limiting sedimentation and aggregation, maintaining homogeneity, and allowing precise control over the displaced volume, thereby reducing performance losses and risks.
Implementation Method 1
the relatively small channel cross section limits the typical height over which sedimentation can occur and as such the related particle re-concentration and risks of aggregation
Implementation Method 2
the reduced cross section of the channel compared to ordinary means for handling suspensions results, at the flow rates used in the applications, in much stronger inertial lift forces than sedimentation forces, allowing for efficient particle resuspension and displacement
Implementation Method 3
a pumping unit configured to move a driving fluid for driving the particle suspension in the channel
Data Source
AI summary
A device for handling a particle suspension, in particular a cell suspension, which includes at least one channel for flowing the particle suspension, a pumping unit configured to move a driving fluid and control element for controlling the pumping unit. Also, a method for handling a particle suspension, which includes flowing the particle suspension in or out of at least one channel using a driving fluid for driving the particle suspension in the channel.