UV Sensor Dialysate Kt/V Prediction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for predicting the final Kt/V value during kidney substitution treatments are unreliable and infrequent, leading to potential under-dialysis and inefficiencies in dialysis adequacy monitoring.
Innovation Solution
A dialysis machine equipped with a UV-sensor or urea sensor coupled to the dialysate circuit, which continuously measures waste product concentration, allowing for real-time Kt/V calculations and predictions by comparing the delivered Kt/V slope with a predetermined guideline, enabling timely adjustments to ensure adequate dialysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If blood samples method is used to measure Kt/V, then measurement precision is improved, but measurement frequency is reduced and time consumption increases
Solution Approach 1:
The patent replaces the mechanical/blood sampling method with an optical sensing system. A sensor detects waste product concentration in the dialysate effluent, and a computer processes this data to calculate Kt/V values in real-time, eliminating the need for blood sampling and laboratory analysis while maintaining measurement accuracy.
Solution Approach 2:
The patent introduces dialysate effluent as an intermediary medium. Instead of measuring waste products directly in blood, the system measures waste product concentration in the dialysate that has contacted the blood in the dialyzer, providing indirect but accurate Kt/V measurement without invasive blood sampling.
2Productivity
If conductivity methods are used to measure urea clearance, then measurement frequency is improved, but measurement precision deteriorates due to sodium load induction
Solution Approach 1:
The patent replaces conductivity-based measurement with optical absorption measurement. A sensor detects waste product concentration through light absorption properties, eliminating the sodium load problem inherent in conductivity methods while maintaining continuous monitoring capability and measurement accuracy.
Solution Approach 2:
The patent changes the measurement parameter from electrical conductivity to optical absorption. By measuring light absorption at specific wavelengths, the system accurately determines waste product concentration without inducing sodium load, thereby improving measurement precision while maintaining high measurement frequency.
3Productivity
If monthly Kt/V measurements are performed, then resource utilization is improved, but patient monitoring reliability deteriorates
Solution Approach 1:
The patent implements continuous monitoring by measuring waste product concentration in dialysate effluent throughout the entire dialysis treatment. The computer continuously calculates Kt/V values, providing real-time feedback on dialysis adequacy rather than relying on infrequent monthly measurements, thereby improving reliability without significantly increasing resource consumption.
Solution Approach 2:
The system uses the dialysate effluent that is already being produced and discarded during normal dialysis treatment. By capturing and analyzing this waste stream, the system obtains continuous Kt/V data without requiring additional samples, equipment, or resources beyond the existing dialysis circuitry.
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 solution provides accurate and timely predictions of the final Kt/V value, enabling healthcare professionals to adjust treatment parameters and improve dialysis efficiency, reducing the risk of under-dialysis and optimizing patient care and resource utilization.
Implementation Method 1
a UV-sensor or urea sensor coupled to the dialysate circuit, which continuously measures waste product concentration
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a method for determining or predicting the adequacy parameters that will be achieved at the end of a kidney substitution treatment during said kidney substitution treatment wherein the kidney substitution treatment is provided by a machine, which has an extracorporeal blood system pumping the patient blood at a preset blood flow rate through the blood chamber of a dialyzer, which is divided by a semi-permeable membrane into the blood chamber and a dialyzing fluid chamber and wherein the dialyzing fluid flows at a preset flow rate through the dialyzing fluid system of the machine and collects the waste products from the patient after flowing through the dialyzing fluid chamber of the dialyzer and wherein a device able to measure continuously any kidney substitution treatment related waste product to deliver together with the data provided by the kidney substitution treatment machine a adequacy parameter wherein the device is coupled with the dialyzing fluid system of the kidney substitution treatment machine and wherein the slope of a preferable linear guideline for the adequacy parameter, which end at target adequacy parameter at the end of the kidney substitution treatment, is compared to the slope of the delivered adequacy parameter and if the slope of both are equal with the next delivered adequacy parameters a linearisation is performed to determine or predict the adequacy parameter at the end of the kidney substitution treatment.