Dialysis System Ultrafiltration Control via Three-Pump Segmentation
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Solution Overview
Problem
Current dialysis systems are large, energy-inefficient, and unsuitable for home use due to their size and high water consumption, lacking precise control over ultrafiltration levels.
Innovation Solution
A dialysis system utilizing three pumps to control fluid flow rates through a dialyzer, allowing for precise hemodialysis, ultrafiltration, and hemodiafiltration, with the third pump supplementing the second pump to achieve desired flow rates and levels of ultrafiltration, enabling efficient and controlled fluid management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If current dialysis systems are used, then dialysis treatment can be performed, but the systems are large and unsuitable for home use
Solution Approach 1:
The dialysis system is divided into separate functional modules including individual pumps for dialysate inflow, outflow, and ultrafiltration control. Each pump operates independently to perform specific functions, allowing the system to be compact while maintaining full dialysis functionality for home use
2Productivity
If current dialysis systems are used, then dialysis treatment can be performed, but they consume large amounts of energy and water
Solution Approach 1:
The system optimizes operating parameters including pump speeds, flow rates, and pressure differentials to minimize energy consumption while maintaining effective dialysis treatment. The third pump provides precise ultrafiltration control that reduces overall energy and water usage compared to traditional systems
3Measurement precision
If two pumps are used for dialysate flow, then basic dialysis function is achieved, but precise ultrafiltration control is lacking
Solution Approach 1:
The fluid control function is segmented into three independent pumps: first pump for dialysate inflow, second pump for dialysate outflow, and third pump specifically for ultrafiltration. This segmentation allows precise control of ultrafiltration as a separate function while maintaining overall system manageability
Solution Approach 2:
The third pump serves multiple purposes including providing ultrafiltration control, adjusting dialysate flow rates, and enabling both hemodialysis and ultrafiltration modes within the same system, making the additional component worthwhile despite increased complexity
4Volume of moving object
If home dialysis systems are made compact, then portability is improved, but precise ultrafiltration control is compromised
Solution Approach 1:
By segmenting the ultrafiltration control into a dedicated third pump, the system achieves precise control in a compact configuration. The independent pump allows accurate flow rate adjustment without requiring a large, complex flow-balancing mechanism
Solution Approach 2:
The patent replaces complex mechanical flow-balancing technology with an electronically controlled third pump that provides precise ultrafiltration control through electronic flow rate adjustment, reducing mechanical complexity while improving control precision in a compact system
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 provides a compact, energy-efficient, and portable solution for dialysis with precise control over ultrafiltration levels, enhancing the ability to perform dialysis in a home setting while maintaining effective waste removal and fluid management.
Implementation Method 1
a first pump for pumping dialysate into a dialyzer
Implementation Method 2
a second pump for pumping dialysate out of the dialyzer
Implementation Method 3
a third pump that provides improved control of a level of ultrafiltration
Implementation Method 4
a third pump for pumping the dialysate through the fluid outlet pathway
Implementation Method 5
Diffusion is the principal mechanism in which dialysis removes waste products such as urea, creatinine, phosphate and uric acid, among others, from the blood
Implementation Method 6
Ultrafiltration is a process in dialysis where fluid is caused to move across the membrane from the blood into the dialysate for the purpose of removing excess fluid from the patient's blood stream. Ultrafiltration is a result of a pressure differential between the blood compartment of the dialyzer and the dialysate compartment of the dialyzer
Implementation Method 7
Along with water, some solutes are also drawn across via convection rather than diffusion
Data Source
AI summary
Systems and methods are disclosed for performing hemodialysis that include fluid handling systems that provide accurate control over the type and level of hemodialysis being performed. The system includes a first pump for pumping dialysate into a dialyzer and a second pump for pumping dialysate out of the dialyzer. The system also includes a third pump that provides improved control of a level of ultrafiltration, hemodiafiltration, or both.