Medical Solution Mixing with Single-Sensor Conductivity Modulation
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Solution Overview
Problem
Existing methods for producing medicinal solutions, such as dialysis solutions, require multiple conductivity sensors for each component and an additional sensor for the mixed solution, resulting in a complex system.
Innovation Solution
The method involves modulating the concentrations of the components so that the cumulative conductivity of the mixed solution remains constant, allowing a single conductivity measuring cell to monitor both components and detect deviations, thereby simplifying the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple conductivity sensors are used for each component and an additional sensor for the mixed solution, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the monitoring of multiple components into a single conductivity sensor that measures the mixed solution. By measuring the total conductivity of the mixed solution and using modulation techniques, the system can derive information about individual component concentrations without requiring separate sensors for each component, thus reducing device complexity while maintaining measurement precision
Solution Approach 2:
The single conductivity sensor in the mixed solution performs multiple functions: it monitors the total conductivity and, through modulation analysis, enables detection of concentration deviations in individual components. This multi-functional approach replaces the need for multiple dedicated sensors, resolving the contradiction between measurement precision and device complexity
2Device complexity
If a single conductivity sensor is used for the mixed solution, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent employs periodic modulation of component concentrations at different frequencies. This periodic action creates distinct conductivity modulation patterns for each component in the mixed solution. By analyzing these frequency-specific modulation patterns, the system can accurately determine individual component concentrations using only a single sensor, thereby maintaining measurement precision while reducing device complexity
Solution Approach 2:
The system dynamically modulates the concentrations of components during mixing, creating time-varying conductivity signals. This dynamic approach allows the single sensor to capture information about multiple components through their unique modulation signatures, resolving the limitation of static single-sensor measurement
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 approach allows for efficient monitoring of the mixed solution's conductivity with a single sensor, enabling the identification of concentration deviations and determining which component is out of range, thus simplifying the production process and reducing system complexity.
Implementation Method 1
the conductivity of the mixture or a parameter of the mixture correlated with the conductivity is measured at at least one, preferably exactly one, measuring point
Data Source
Figure 1~3
AI summary
The present invention relates to a method for producing a medical solution from at least one first and at least one second liquid component, wherein the first component and the second component are each conveyed by a conveying means to obtain a mixture solution, wherein the conveying means are operated such that the concentration of the first and the second component is modulated and the conductivity or a parameter correlated with the conductivity of the mixture solution is measured at a measuring point, wherein the modulation of the concentrations is carried out in a target state such that no modulation or a specific modulation of the measured conductivity or the parameter correlated with the conductivity occurs. The present invention further relates to a device for producing a medical solution and to a blood treatment device with such a device.