PGA Sorbent Urea Binding Miniature Dialysis
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Solution Overview
Problem
Current dialysis methods, such as hemodialysis and peritoneal dialysis, face challenges in efficiently removing urea, a major waste product, which hinders the miniaturization of dialysis devices and affects patient health and quality of life due to inadequate urea binding capacity and generation of harmful byproducts.
Innovation Solution
A phenylglyoxaldehyde (PGA)-type sorbent is developed by polymerizing specific monomers and converting them into PGA-type monomers, achieving a higher urea binding capacity of over 1.60 mmol/g, suitable for use in miniature dialysis devices without generating harmful side products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dialysis methods are used to remove waste molecules, then patient fluids are dialysed against dialysis fluid, but the treatment is time-consuming and removal of waste molecules is inadequate
Solution Approach 1:
The patent extracts and isolates the waste molecule removal function from the bulk dialysis fluid system by introducing a specific sorbent material that selectively binds urea and other waste molecules. This allows concentrated waste removal in a compact form factor, enabling more efficient clearance without requiring proportional increases in treatment time or fluid volumes.
Solution Approach 2:
The invention changes the chemical parameters of the dialysis system by introducing sorbent materials with specific binding capacities and affinities for waste molecules. The sorbent's ability to bind urea and other solutes at high capacity fundamentally alters the mass transfer dynamics, enabling more effective waste removal per unit time.
2Volume of moving object
If dialysis fluid volume is reduced for miniaturization, then device size is reduced, but waste solute removal capacity becomes inadequate
Solution Approach 1:
The patent applies local quality by concentrating waste removal functionality in specific regions within the dialysis device where sorbent materials are positioned. Rather than uniformly distributing removal capacity throughout a large fluid volume, the sorbent provides localized high-capacity binding sites that efficiently capture waste molecules as they pass through the dialysis chamber.
Solution Approach 2:
The invention uses composite materials combining sorbent substances with support matrices to create a compact, high-capacity waste removal medium. These composite structures provide both the chemical binding capability and the physical framework needed for efficient mass transfer in a miniaturized device configuration.
3Productivity
If existing sorbent materials are used for urea binding, then some urea removal is achieved, but binding capacity is insufficient and harmful byproducts are generated
Solution Approach 1:
The patent changes the chemical parameters of sorbent materials by selecting substances with specific functional groups and binding characteristics that favor urea attachment without generating harmful byproducts. The sorbent's chemical structure is optimized to provide high binding capacity while maintaining biocompatibility and avoiding toxic reactions.
Solution Approach 2:
The invention converts the challenge of urea's low reactivity into a benefit by using sorbent materials that exploit urea's specific molecular properties for selective binding. The sorbent is designed to interact with urea's functional groups in a way that achieves high capture efficiency without requiring aggressive chemical reactions that would generate harmful byproducts.
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 PGA-type sorbent effectively binds urea, enabling more efficient urea removal and regeneration of dialysate, potentially leading to smaller, more portable and cost-effective dialysis devices that improve patient health and mobility.
Implementation Method 1
A phenylglyoxaldehyde (PGA)-type sorbent is developed by polymerizing specific monomers and converting them into PGA-type monomers, achieving a higher urea binding capacity of over 1.60 mmol/g
Implementation Method 2
During this process waste solutes from the patient fluid move towards the dialysate by diffusion and/or convection, often through a membrane such as a semipermeable membrane
Implementation Method 3
During this process waste solutes from the patient fluid move towards the dialysate by diffusion and/or convection, often through a membrane such as a semipermeable membrane
Data Source
AI summary
The present invention relates to a method for preparing a macromolecular composition comprising phenylglyoxaldehyde-derivatives. The invention also relates to the macromolecular compositions per se, and to methods of using the macromolecular compositions. The macromolecular compositions are useful for undergoing subsequent reactions with small molecules, for instance to remove such small molecules from a solution.