Tissue Hydration Measurement via Impedance Perturbation
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Solution Overview
Problem
Current methods for determining tissue hydration levels, such as edema staging, are qualitative and dependent on physician perception, lacking accuracy and objectivity.
Innovation Solution
A system and method that apply mechanical perturbations to a tissue region using a displacement device, calculating compression and retraction impedance to determine hydration levels based on these measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional manual edema staging methods are used, then the assessment can be performed with simple equipment, but the measurement precision and objectivity deteriorate due to dependence on physician perception
Solution Approach 1:
The patent replaces the manual mechanical assessment method (physician pressing and visual observation) with an automated electrical impedance measurement system. The impedance measurement system uses electrical signals to quantify tissue hydration levels, providing objective and precise measurements independent of physician perception, while maintaining relatively simple device structure.
2Measurement precision
If electrical impedance measurement is implemented, then measurement precision improves, but the ease of operation deteriorates due to complex measurement procedures
Solution Approach 1:
The patent employs periodic mechanical perturbation (compression and release cycles) applied to the tissue during impedance measurement. This periodic action creates characteristic impedance variations that enable differentiation between edema and dehydration stages, improving measurement precision while maintaining operational simplicity through automated cycle control.
Solution Approach 2:
The system dynamically adjusts measurement parameters based on real-time impedance changes during compression and release phases. By capturing impedance measurements at multiple dynamic states (compressed, releasing, returned), the system achieves high measurement precision while the automation handles operational complexity.
3Reliability
If mechanical perturbation is applied during measurement, then the reliability of hydration level determination improves, but the duration of the measurement process increases
Solution Approach 1:
The patent performs impedance measurements continuously throughout the entire mechanical perturbation cycle (compression, release, and return phases). This continuous measurement approach captures the complete tissue response to mechanical stress, improving reliability by providing multiple data points from a single applied perturbation while minimizing total measurement time.
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
Provides an accurate and quantitative assessment of tissue hydration levels, improving upon subjective methods by offering a reliable and objective measurement of edema or dehydration stages.
Implementation Method 1
applying a mechanical perturbation to a tissue region using a displacement device
Implementation Method 2
calculating a compression impedance of the tissue region in response to applying the mechanical perturbation and a retraction impedance of the tissue region in response to retracting the displacement device
Data Source
AI summary
In accordance with one aspect of the present technique, a method is disclosed. The method includes applying a mechanical perturbation to a tissue region using a displacement device. The method further includes calculating a compression impedance of the tissue region in response to applying the mechanical perturbation. The method further includes retracting the displacement device and calculating a retraction impedance of the tissue region in response to retracting the displacement device. The method also includes determining a hydration level of the tissue region based on at least one of the compression impedance and the retraction impedances.