Microfluidic Platelet Production Device Using Laminar Flow Shear Stress
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Solution Overview
Problem
Current methods for producing platelets from megakaryocytes are inefficient, with less than 100% production in 6 days and inferior functionality and efficiency compared to turbulent flow-dependent culture methods, and shear stress-dependent microfluidic chip bioreactors fail to achieve high-quality platelet production.
Innovation Solution
A method involving turbulent flow culture of megakaryocytes for at least 6 days followed by exposure to a shear stress-dependent microfluidic chip bioreactor, using a platelet production device with a channel design that captures megakaryocytes and applies laminar flow to promote platelet production, ensuring constant shear stress and efficient platelet release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If megakaryocytes are cultured using shear stress-dependent microfluidic chip bioreactor, then platelet production can be achieved, but the functionality and efficiency are inferior compared to turbulent flow-dependent culture methods
Solution Approach 1:
The patent applies preliminary action by culturing megakaryocytes under turbulent flow conditions for 6 days before transferring them to the microfluidic chip. This pre-culture phase allows megakaryocytes to mature and develop platelet production capability, ensuring they are in the optimal state for subsequent platelet generation in the chip, thereby improving both efficiency and functionality
Solution Approach 2:
The patent changes the flow regime parameter from turbulent flow during pre-culture to laminar flow in the microfluidic chip. This parameter change optimizes the culture conditions at different stages: turbulent flow promotes megakaryocyte maturation, while laminar flow with controlled shear stress promotes platelet production, resolving the contradiction between efficiency and functionality
2Productivity
If megakaryocytes are cultured for extended periods to improve maturation, then platelet production efficiency increases, but the culture time and process complexity increase
Solution Approach 1:
The patent uses preliminary action by implementing a standardized 6-day turbulent flow pre-culture protocol that optimally matures megakaryocytes before chip transfer. This predetermined culture period has been optimized to achieve maximum platelet production efficiency without excessive time investment, balancing maturation needs with process efficiency
Solution Approach 2:
The patent applies dynamics by transitioning megakaryocytes from a turbulent flow environment to a laminar flow microfluidic chip environment. This dynamic change in flow regime allows the system to optimize for different biological functions at different stages, achieving high platelet production efficiency without requiring excessively long culture periods in a single static condition
3Productivity
If the channel height is reduced to capture megakaryocytes, then platelet production efficiency improves, but megakaryocyte injection and capture becomes more difficult
Solution Approach 1:
The patent applies local quality by creating a spatial gradient in channel height along the flow direction. The channel height decreases from the injection port toward the collection section, with different sections having different heights optimized for different functions: larger height at injection for easy cell introduction, smaller height downstream for effective platelet capture and production, thus resolving the contradiction between ease of operation and production efficiency
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 enables the efficient production of human platelets with functionality equivalent to those from donated blood, reducing variation in platelet production and improving maturation and functionality.
Implementation Method 1
culturing a megakaryocyte for at least 6 days in a platelet production medium in which a turbulent flow is generated
Implementation Method 2
injecting the medium including the megakaryocyte that has undergone step (a) into a platelet production device to expose the megakaryocyte to a laminar flow
Implementation Method 3
expose the megakaryocyte to a laminar flow
Data Source
AI summary
The present invention provides a method for producing a platelet comprising: (a) a step of culturing a megakaryocyte for at least 6 days in a platelet production medium in which a turbulent flow is generated; and (b) a step of injecting the medium comprising the megakaryocyte that has undergone step (a) into a predetermined platelet production device to expose the megakaryocyte to a laminar flow.