Cell Culture Device Suction Velocity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In cell culture methods, aggregates can adhere to filters, reducing culture efficiency and inhibiting cell growth due to the risk of excessive negative pressure and filter clogging, even with structures designed to prevent it.
Innovation Solution
A culture device and method that utilize a suction tube with an auxiliary filter and a control unit to adjust suction flow velocity to an antagonistic suction flow velocity, preventing aggregate sedimentation and allowing for efficient medium exchange without filter clogging, using a culture vessel with aggregates and a culture medium, and a suction unit controlled by a control unit to manage the flow velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is provided in the outer tube to prevent excessive negative pressure, then the filter can be protected from clogging with large aggregates, but aggregates will come into contact with the filter and may adhere to it, reducing culture efficiency
Solution Approach 1:
The invention removes the filter from the suction tube system entirely. Instead of filtering aggregates during suction, the system uses controlled suction flow velocity to selectively suction culture medium while allowing aggregates to remain in the culture vessel due to their larger size and different flow characteristics. This eliminates the filter clogging problem while maintaining medium exchange efficiency.
Solution Approach 2:
The invention changes the operating parameter of suction flow velocity to a specific range (0.5-2.0 m/s) that creates a flow field where culture medium is effectively suctioned but aggregates are not drawn into the suction tube. This parameter optimization allows filterless operation while preventing aggregate loss and maintaining culture efficiency.
2Productivity
If suction flow velocity is increased to improve medium exchange efficiency, then culture medium can be replaced more efficiently, but aggregates may be suctioned along with the medium, reducing cell growth
Solution Approach 1:
The invention optimizes the suction flow velocity to a specific range (0.5-2.0 m/s) that creates a balance between medium exchange efficiency and aggregate retention. At this velocity range, the suction force is sufficient to efficiently replace culture medium but not strong enough to draw aggregates into the suction tube, thereby maintaining both productivity and cell growth.
Solution Approach 2:
The invention dynamically adjusts suction parameters based on the characteristics of aggregates and culture medium. By controlling suction flow velocity within an optimal range rather than using fixed high suction rates, the system adapts to maintain effective medium exchange while preventing aggregate loss throughout the culture 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
This approach improves cell culture efficiency by preventing aggregate adherence to filters, maintaining cell growth, and enabling effective medium exchange, thereby enhancing the overall culture process.
Implementation Method 1
a suction unit that generates suction force in the suction tube
Implementation Method 2
an antagonistic suction flow velocity of an aggregate, which is a velocity at which sedimentation of the aggregate is antagonistic to floating of the aggregate
Implementation Method 3
a velocity at which sedimentation of the aggregate is antagonistic to floating of the aggregate due to the suction of the culture medium
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A culture device (1) includes: a culture vessel (2) that contains an aggregate (S) of cells and a culture medium (W); a suction tube (4) that suctions the culture medium (W) in the culture vessel (2); a suction unit (8) that generates suction force in the suction tube (4); and a control unit (14) that controls the suction unit (8) based on an antagonistic suction flow velocity of the aggregate (S), which is a velocity at which sedimentation of the aggregate (S) is antagonistic to floating of the aggregate (S) due to the suction of the culture medium (W).