Peritoneal Dialysis Solution Preparation Apparatus with Integrated Gravimetric Scale
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Solution Overview
Problem
Existing point-of-care peritoneal dialysis systems face challenges in simplifying the preparation of peritoneal dialysis solutions at the point of use, making them prone to errors.
Innovation Solution
An apparatus comprising a disposable solution bag system with a scale for precise liquid measurement, a storage unit for liquid, a control unit, and actuators to regulate fluid flow, ensuring accurate and error-free preparation of peritoneal dialysis solutions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual preparation of dialysis solution is performed, then flexibility and adaptability are improved, but preparation accuracy and reliability deteriorate due to human error
Solution Approach 1:
The system performs self-measurement using integrated scales and self-control through automated pumping mechanisms. The apparatus automatically regulates liquid flow from the storage unit to the solution bag based on weight measurements, eliminating the need for manual measurement and calculation while maintaining flexibility through programmable parameters.
Solution Approach 2:
Manual mechanical preparation operations are replaced by an automated control system that uses electronic sensors, scales, and programmable logic. The control unit monitors and adjusts the filling process automatically, substituting human operators with an automated feedback-controlled system that ensures consistent accuracy.
2Manufacturing precision
If automated filling systems are used, then preparation accuracy is improved, but device complexity increases
Solution Approach 1:
Multiple functions are merged into a single integrated apparatus: the scale for weight measurement, the pump for liquid transfer, the control unit for automation, and the heating element for temperature control are all combined in one device. This consolidation improves precision while managing complexity through integration rather than separate components.
Solution Approach 2:
The apparatus is designed as a multi-functional system that can perform weighing, automated filling, heating, and monitoring functions using a single integrated platform. The control unit manages multiple operations sequentially, allowing the same hardware to serve multiple purposes without proportionally increasing complexity.
3Measurement precision
If precise measurement and control systems are implemented, then solution concentration accuracy is improved, but ease of operation deteriorates due to complex procedures
Solution Approach 1:
The system continuously monitors the weight of the solution bag during filling and automatically adjusts the pumping rate to achieve the target concentration. The control unit receives real-time feedback from the scale and modifies the filling process accordingly, ensuring accuracy while requiring minimal user intervention beyond initiating the process.
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 apparatus enables simple, accurate, and error-free preparation of peritoneal dialysis solutions at the point of use, ensuring the correct concentration and quantity of dialysis solution for patient treatment.
Implementation Method 1
a scale at which the solution bag of the disposable is arranged, with the control unit being configured to initiate a filling of the solution bag with liquid from the storage unit using the actuators and to determine the quantity of the liquid that has flowed into the solution bag using the scale
Implementation Method 2
the apparatus comprises a pump and that the control unit is configured to initiate an active conveying of the liquid to the solution bag
Implementation Method 3
the apparatus comprises a flow regulator and that the control unit is configured to initiate a gravimetric flow of the liquid into the solution bag using the flow regulator
Data Source
AI summary
The invention relates to an apparatus for preparing a peritoneal dialysis solution at the point of use comprising a disposable having a solution bag and associated filling lines and patient lines; a storage unit for liquid connected to the filling line; a control unit; and actuators for regulating a flow from the storage unit to the disposable, wherein the apparatus furthermore comprises a scale at which the solution bag of the disposable is arranged, with the control unit being configured to initiate a filling of the solution bag with liquid from the storage unit using the actuators and to determine the quantity of the liquid that has flowed into the solution bag using the scale.