Capillary Well Discharge Structure for Dynamic Cell Culture
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Solution Overview
Problem
Existing cell culture systems fail to dynamically replicate the physiological microenvironment, particularly in terms of nutrient supply and drug exposure, necessitating devices that can manage the controlled discharge and recovery of fluids on a large scale.
Innovation Solution
A discharge system with capillary tubes and a frustoconical distal portion is integrated into cell culture wells, allowing controlled fluid output and collection, utilizing gravity and capillarity for fluid movement, with adjustable flow rates and collection systems to ensure reproducible and controlled discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static culture is used, then device complexity is reduced, but the ability to replicate physiological conditions deteriorates
Solution Approach 1:
The culture well uses passive capillary action through specifically designed outlet structures to automatically regulate fluid discharge without external control systems. The capillary forces and gravity work together to create controlled flow patterns that replicate physiological conditions, eliminating the need for complex active pumping or control mechanisms while maintaining reliable physiological replication.
Solution Approach 2:
The invention employs capillary hydraulic principles through the outlet structure design, where capillary forces dominate fluid movement at the micro-scale. The outlet geometry creates specific capillary pressure conditions that regulate fluid discharge automatically, enabling dynamic culture conditions through passive hydraulic control rather than complex mechanical or electronic systems.
2Reliability
If controlled fluid discharge is implemented, then physiological condition replication is improved, but device complexity increases
Solution Approach 1:
The discharge system uses passive capillary action through specifically designed outlet structures to automatically regulate fluid discharge without external control systems. The capillary forces and gravity work together to create controlled flow patterns, eliminating the need for complex active pumping or control mechanisms while maintaining reliable physiological replication.
Solution Approach 2:
The invention controls fluid discharge by changing the geometric parameters of the outlet structure, specifically the hydraulic diameter and shape of the outlet opening. These dimensional parameters directly control capillary pressure and flow rate, enabling precise regulation of fluid discharge and physiological condition replication through simple geometric design rather than complex control mechanisms.
3Manufacturing precision
If capillary tubes with small hydraulic diameter are used, then fluid flow control precision is improved, but fluid flow rate decreases
Solution Approach 1:
The invention controls fluid discharge by changing the geometric parameters of the outlet structure, specifically the hydraulic diameter and shape of the outlet opening. These dimensional parameters directly control capillary pressure and flow rate, enabling precise regulation of fluid discharge through simple geometric design.
Solution Approach 2:
The frustoconical outlet structure introduces a dimensional transition from a narrow capillary channel to a wider opening. This dimensional change along the flow path creates a pressure gradient that maintains precise control while enabling adequate flow rates, as the gradual expansion allows pressure buildup and controlled release rather than abrupt discharge.
4Reliability
If large scale fluid management is implemented, then physiological condition replication is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The discharge system is designed as a universal component that can be integrated into various culture well formats and scales. The capillary outlet structure serves multiple functions: fluid discharge, flow rate regulation, and physiological condition creation, all through a single geometric design that can be manufactured using standard techniques and scaled to different well sizes without fundamental design changes.
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 system enables dynamic cell culture by replicating physiological conditions, providing controlled fluid discharge and collection, ensuring high reproducibility, versatility, and uniformity of liquid volumes, compatible with standard laboratory equipment.
Implementation Method 1
said inlet, where present, and a portion of said discharge system comprise open tubes of capillary size... allow the fluid to enter and exit in/from said well
Implementation Method 2
A discharge system with capillary tubes and a frustoconical distal portion is integrated into cell culture wells, allowing controlled fluid output and collection, utilizing gravity and capillarity for fluid movement
Data Source
AI summary
The present invention relates to a discharge system for cell culture wells, comprising an outlet (1) comprising a proximal portion (10) and a distal portion (11, 21), wherein said proximal portion (10) comprises a capillary which engages on said distal portion (11, 21), said capillary having an inlet and an outlet, wherein said outlet engages on said distal portion which is open and has an outlet opening with a greater hydraulic diameter than the hydraulic diameter of said capillary. The present invention further relates to a method for dynamically culturing cells and/or tissues using said discharge system.