Compressed Absorption Zone for Uniform Cell Deposition
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Solution Overview
Problem
Existing cell deposition devices by decantation face issues with non-homogeneous cell distribution due to rapid absorption of preservation liquid, requiring complex and bulky centrifugation or cumbersome handling of clamping mechanisms, and often result in cell damage or prolonged settling times.
Innovation Solution
A device with a compressed absorption material zone around the cell deposit area, slowing initial liquid absorption for uniform cell deposition, transitioning to an uncompressed zone for rapid absorption, combined with a gasket and clamping system to maintain material position without manual handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the absorbent material absorbs the preservation liquid rapidly, then the liquid absorption speed is improved, but the cell deposit homogeneity deteriorates
Solution Approach 1:
The absorbent material is divided into two functional zones: a first zone in direct contact with the cell suspension that absorbs liquid slowly to ensure homogeneous cell deposition, and a second zone that absorbs liquid rapidly to speed up the overall process. This segmentation allows each zone to perform its specific function optimally without compromising the other.
Solution Approach 2:
Different regions of the absorbent material are given different absorption properties. The first zone has lower absorption capacity to maintain slow, controlled liquid removal for uniform cell settling, while the second zone has higher absorption capacity to rapidly remove excess liquid. This local differentiation of material properties resolves the contradiction between speed and homogeneity.
2Manufacturing precision
If a clamping piece is used to compress the absorbent material, then the cell deposit homogeneity is improved, but the device complexity and handling difficulty increase
Solution Approach 1:
The absorbent material is pre-compressed during manufacturing to create the first zone with reduced absorption capacity. This pre-compression is permanently integrated into the material structure, eliminating the need for separate clamping mechanisms during the cell deposition process. The material serves itself by having the required compression built-in, simplifying the overall device.
3Loss of time
If centrifugation is used to accelerate cell deposition, then the settling time is reduced, but the device complexity, size, and cost increase
Solution Approach 1:
The invention replaces the complex mechanical centrifugation system with a simpler passive absorption system. By using an absorbent material with differentiated zones, the device achieves accelerated cell deposition without requiring motors, rotating components, or complex mechanical structures. The absorption physics naturally provides the needed separation and timing control.
4Loss of time
If centrifugation is used to accelerate cell deposition, then the settling time is reduced, but cell damage increases due to folding and crushing
Solution Approach 1:
Instead of using external mechanical force (centrifugation) to push cells onto the plate, the invention uses an absorbent material that passively draws liquid away, allowing cells to settle naturally under gravity. This inverted approach—removing the harmful centrifugal force and using gentle absorption instead—reduces cell damage while still achieving faster deposition through the differentiated absorption zones.
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
Achieves uniform cell deposition in a reduced settling time, eliminating the need for manual handling and minimizing cell damage, while being suitable for automation and integration into processing lines.
Implementation Method 1
the bottom of which is open and extends facing a zone for depositing cells of the analysis plate, the bottom of the chamber being in fluid communication with a material for absorbing the preservation liquid in order to gradually absorb it
Implementation Method 2
a material for absorbing the preservation liquid in order to gradually absorb it and allow a homogeneous deposit by decantation of the cells
Implementation Method 3
the absorption material comprises a compressed zone, in which the absorption material is compressed, said compressed zone extending between the bottom of the receiving chamber and the analysis plate around the cell deposition zone
Implementation Method 4
The absorbed preservative liquid then passes into the uncompressed area of the absorption material, which speeds up the absorption process
Implementation Method 5
the bottom of the receiving chamber comprises a gasket, said gasket pressing homogeneously on the surface of the compressed zone of the absorption material
Data Source
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AI summary
The device of the invention includes a reception chamber (5) for a cell suspension having an open bottom (6) extending opposite a cell deposition area (7) of the analysis plate (1), the bottom (6) of the chamber (5) being in fluid communication with an absorption material (14) for cell preservation liquid for absorbing the latter and enabling a homogeneous decantation deposition on the deposition area (7), the absorption material (14) being provided about the cell deposition area (7). The absorption material (14) includes a compressed area (16) extending between the bottom (6) of the reception chamber (5) and the analysis plate (1) about the cell deposition area (7), and a non-compressed area (17) extending about the compressed area (16).