Skin Capacitance Monitoring for Non-Invasive Fat Burning Detection
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Solution Overview
Problem
Current methods for non-invasive, continuous monitoring of ketone levels in the body, particularly for fat burning, are limited in accuracy and practicality, as they either require invasive procedures or provide indirect and unreliable measurements, and do not account for variations in skin conductivity due to factors like sweat and contact force.
Innovation Solution
A device utilizing an interdigitated portion to measure skin capacitance, specifically in the nano farad range, to detect changes in skin capacitance indicative of ketosis, allowing for non-invasive and reliable monitoring of fat burning by measuring skin capacitance at different depths and frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If invasive procedures are used to measure ketone levels, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent uses skin capacitance as an intermediary parameter to indirectly measure ketone levels. Instead of directly measuring ketones through invasive means, the device measures changes in skin capacitance caused by acetone's effect on skin conductivity, providing a non-invasive alternative that maintains measurement capability while improving ease of operation
Solution Approach 2:
The patent replaces invasive mechanical procedures (blood draws, needle insertions) with an electrical measurement system. By using capacitance sensors to detect electrical properties of skin, the system substitutes mechanical invasion with non-contact or minimal-contact electrical field measurements, achieving both precision and ease of operation
2Ease of operation
If indirect measurement methods are used for ketone levels, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent employs feedback mechanisms where the measured skin capacitance values are continuously monitored and correlated with known ketone levels. The system uses this feedback to calibrate and refine its measurements, improving precision over time while maintaining the ease of non-invasive operation
Solution Approach 2:
The patent measures changes in skin capacitance parameters rather than absolute values. By detecting variations in capacitance that correlate with ketone level changes, the system achieves measurement precision through parameter dynamics rather than static measurements, maintaining both ease of operation and accuracy
3Ease of operation
If skin conductivity measurement is used to detect ketosis, then ease of operation is improved, but reliability deteriorates due to sweat and contact force variations
Solution Approach 1:
The patent performs preliminary measurements or calibration steps before actual ketone detection. By establishing baseline capacitance values under known conditions first, the system can later distinguish between changes caused by ketosis versus changes caused by sweat or contact force variations, improving reliability while maintaining ease of operation
Solution Approach 2:
The patent measures multiple parameters beyond just skin capacitance, including additional electrical properties or environmental factors. By measuring more than the minimum required parameter, the system can compensate for variations in sweat and contact force through multi-parameter analysis, enhancing reliability without significantly complicating operation
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 a reliable, non-invasive method for monitoring fat burning by accurately detecting changes in skin capacitance, correlating with breath acetone levels, offering real-time feedback on fat metabolism without the limitations of previous technologies.
Implementation Method 1
an interdigitated portion having two opposing ends and configured for contacting skin of a subject and measuring skin capacitance
Data Source
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AI summary
An apparatus and a method of monitoring fat burning in a subject non-invasively by measuring capacitance of the skin is described. In some embodiments, capacitance is measured at one or more skin depths for measuring acetone concentration and/or production as an indicator of fat burning or ketosis.