Closed-Loop Perfusion System With Semi-Porous Membrane
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional cell culture methods require frequent opening of culture containers, leading to inefficient nutrient delivery, waste removal, and exposure to external environmental factors that can harm cells and lead to contamination or infection.
Innovation Solution
A closed-loop perfusion system that maintains a sealed environment for cell cultures, using a filtering unit with a semi-porous membrane to continuously circulate fresh nutrient media and remove metabolic waste without exposing the cells to external factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional media replacement process is used, then nutrients can be supplied to cells, but cells are exposed to external environmental factors leading to contamination and osmotic disruption
Solution Approach 1:
A semi-permeable membrane is introduced as an intermediary between the cell culture and the external environment. This membrane allows selective passage of substances while maintaining isolation, enabling nutrient supply without direct exposure to contaminants. The membrane acts as a filter that permits beneficial molecules through while blocking harmful external factors.
Solution Approach 2:
The patent creates a closed-loop perfusion system that establishes a controlled, isolated environment for cell culture. By maintaining a sealed system with continuous media circulation through the semi-permeable membrane, the cells are protected from external environmental fluctuations and contamination sources, effectively creating an inert protective atmosphere.
2Object-generated harmful factors
If manual media replacement is performed, then waste products can be removed, but labor and time are consumed increasing research costs
Solution Approach 1:
The closed-loop perfusion system enables automatic continuous circulation of culture media through the cell culture container. The system self-regulates by continuously filtering and replenishing media without requiring manual intervention, thereby eliminating the labor-intensive process of repeated media changes while maintaining effective waste removal.
Solution Approach 2:
The patent implements continuous media circulation rather than periodic manual replacement. The closed-loop system maintains constant flow of fresh media through the culture container, ensuring continuous nutrient supply and waste removal without interruption or manual intervention, thereby eliminating time loss associated with repeated manual operations.
3Quantity of substance
If frequent media replacement is done, then nutrient delivery can be maintained, but cell growth is disrupted and beneficial products are lost
Solution Approach 1:
The closed-loop system creates a stable, isolated environment that prevents external disruptions to cell growth. By maintaining continuous circulation within a sealed system, the cells experience consistent environmental conditions without the stress of repeated opening and closing, thereby protecting cell health and maximizing productivity.
Solution Approach 2:
The semi-permeable membrane serves as a selective barrier that allows continuous nutrient and waste exchange while protecting the cell culture from external disturbances. This intermediary enables sustained nutrient delivery without the disruptive effects of manual media replacement, preserving both cell growth and beneficial products.
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 closed-loop perfusion system improves cell growth and extends cell life by maintaining a stable, self-contained environment, reducing labor and time intensive tasks, and minimizing contamination risks while efficiently delivering nutrients and removing waste.
Implementation Method 1
The filtering unit includes a semi-porous membrane that permits the removal of metabolic waste from the closed-loop system while retaining any beneficial molecules produced by the cell culture within the system
Implementation Method 2
fresh nutrients may diffuse into the closed-loop circuit, while waste products such as metabolic waste may diffuse out of the closed-loop circuit
Data Source
AI summary
A closed-loop perfusion system may include a sealed biological culture container configured to house a biological cell culture, and a filtering unit that permits passage of waste products from an output of the sealed biological cell culture container, permits passage of nutrients from a nutrient media solution, and blocks passage of beneficial molecules from the output of the sealed biological cell culture container. The system may further include a first fluid path between an output of the sealed biological cell culture container and an input of the filtering unit, a second fluid path between an output of the filtering unit and an input of the sealed biological cell culture, and a pump to control the flow of media through the first fluid path and the second fluid path.