Modular Microfluidic Capillaries for Dialysis Toxin Removal
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Solution Overview
Problem
Current dialysis technologies, particularly those using hollow fiber technology, are inefficient and fail to adequately remove middle molecular weight uremic toxins and protein-bound toxins, leading to suboptimal patient outcomes and the need for improved water quality to reduce inflammation and oxidative stress in renal replacement therapies.
Innovation Solution
The development of modular, adjustable, and scalable microfluidic-based capillaries and lymphatic technology (MCAL Technology) that mimics human capillaries and lymphatic systems, using biomimetically designed microfluidic chipset units with various semipermeable membranes and microchannels to create efficient dialysis systems capable of removing a broader range of toxins and improving water purification for intravenous use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hollow fiber technology is used for dialysis, then the dialysis system can be implemented with existing technology, but the efficiency of removing middle molecular weight uremic toxins and protein-bound toxins is insufficient
Solution Approach 1:
The invention divides the dialysis system into multiple microfluidic channels with different pore sizes and characteristics, segmenting the toxin removal process into multiple stages. This allows simultaneous removal of different molecular weight toxins through tailored membrane properties, resolving the contradiction between productivity (toxin removal efficiency) and reliability (dialysis adequacy).
Solution Approach 2:
The invention employs composite membrane structures with varying pore sizes, materials, and properties within a single dialysis system. This composite approach enables the system to handle multiple toxin types (small solutes, middle molecules, and protein-bound toxins) simultaneously, achieving both high productivity and comprehensive dialysis adequacy that single-hollow-fiber systems cannot provide.
2Ease of manufacture
If conventional dialysate preparation is used, then the water treatment process is simple and cost-effective, but bacterial proliferation and cytokine-inducing substances cannot be completely prevented
Solution Approach 1:
The invention incorporates advanced porous filtration membranes with specific pore size distributions in the dialysate preparation system. These porous materials physically trap bacteria and cellular debris while allowing water and electrolytes to pass, effectively reducing microbiological contamination and cytokine-inducing substances while maintaining a relatively simple preparation process.
Solution Approach 2:
The invention implements continuous filtration and purification processes in the dialysate preparation system, ensuring that water quality is continuously monitored and treated. This continuous action prevents bacterial proliferation by maintaining constant filtration, resolving the contradiction between ease of manufacture and prevention of harmful factors.
3Object-affected harmful factors
If ultrapure dialysate is used, then inflammation and oxidative stress are reduced, but the water treatment complexity and cost increase
Solution Approach 1:
The invention adds a new dimension to water purification by incorporating multiple filtration stages with progressively finer pore sizes, moving from coarse to fine filtration. This multi-dimensional approach achieves ultrapure dialysate quality by systematically removing contaminants at different levels, reducing inflammation and oxidative stress while managing treatment complexity through structured progression.
Solution Approach 2:
The invention applies different filtration properties and membrane characteristics at different locations and stages of the water treatment process. Early stages use robust, simpler filters for bulk removal, while later stages employ specialized membranes for trace contaminant removal. This local quality differentiation achieves ultrapure dialysate while optimizing the complexity-cost ratio by not over-engineering every stage.
4Productivity
If modular microfluidic-based capillaries and lymphatic technology is implemented, then toxin removal efficiency and water quality improve, but the device complexity and manufacturing challenges increase
Solution Approach 1:
The invention segments the complex microfluidic system into standardized modular units that can be manufactured separately and assembled. Each module contains specific microchannel configurations and membrane types, allowing specialized manufacturing processes for each component while simplifying overall device fabrication through modular assembly and standardization.
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 technology enables more efficient filtration and removal of middle molecular weight uremic toxins and protein-bound toxins, reduces inflammation, and improves water quality, leading to enhanced patient outcomes and reduced healthcare costs by providing a portable, wearable, and scalable dialysis solution.
Implementation Method 1
the semipermeable membrane configured to enable passage of toxins and water from the blood in the blood microfluidic chip to the dialysate in the dialysate microfluidic chip
Implementation Method 2
the semipermeable membrane configured to enable passage of toxins and water from the blood in the blood microfluidic chip to the dialysate in the dialysate microfluidic chip
Implementation Method 3
The microfluidic units are configured to enable any one of different forms of blood filtration, ultrafiltration, diafiltration, plasma separation and dialysis of blood
Implementation Method 4
the blood microfluidic chip and the dialysate microfluidic chip comprising integrated micro-pumps, the integrated micro-pumps configured to pump the blood to and from the blood microfluidic chip
Data Source
AI summary
A technology that provides various modular biomimetic microfluidic modules emulating varieties of microvasculature in body. These microfluidic-base capillaries and lymphatic Technology modules are constructed as multilayered-microfluidic microchannels of various shapes, and aspect ratios using diverse biocompatible microfluidic polymers. Then, various semipermeable membranes are sandwiched in between these multilayered microfluidic microchannels. These membranes have different chemical, physical characteristics and MWCO values. Consequently, this design will produce much smaller dimension channels similar to human vasculature to achieve biomimetic properties like of human organs and tissues. By interchanging microfluidic-layers or the membranes various diverse modules are designed that act as building blocks for constructing various medical devices, various forms of dialysis devices including albumin and lipid dialysis, water purification, bioreactors, bio-artificial organ support systems. Connecting various modules in diverse combinations, permutations, in parallel and/or in series to ultimately design many unrelated medical devices such as dialysis, bioreactors and organ support devices.