Bioelectrical Impedance Bone Density Measurement for Home Use
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Solution Overview
Problem
Current bone mineral density measurement methods, such as dual energy X-ray absorptiometry (DXA), are costly, time-consuming, and not suitable for home health care due to their high cost and requirement for hospital-based setups.
Innovation Solution
A bioelectrical impedance analyzer using electrode sets, a signal processing unit, and an estimation unit to calculate bone mineral density based on resistance, reactance, and height, providing a low-cost, fast, and convenient measurement solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dual energy X-ray absorptiometry (DXA) is used to measure bone mineral density, then measurement accuracy is improved, but cost and time consumption increase significantly
Solution Approach 1:
The patent replaces the mechanical/X-ray based DXA system with a bioelectrical impedance analysis system that uses electrical signals to measure bone mineral density. The electrode sets apply small electrical currents through the body, and the resulting impedance measurements are used to calculate BMD, substituting the complex X-ray mechanism with a simpler electrical measurement approach that is faster and suitable for home use
Solution Approach 2:
The patent changes the measurement parameters from X-ray absorption levels to bioelectrical impedance parameters (resistance and reactance). By measuring electrical impedance at different frequencies and correlating these parameters with bone mineral density through regression analysis, the system achieves acceptable measurement accuracy while dramatically reducing measurement time and cost
2Measurement precision
If dual energy X-ray absorptiometry (DXA) is used to measure bone mineral density, then measurement accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces the complex X-ray generation, detection, and processing system with a simple bioelectrical impedance analyzer consisting of electrode sets and basic electrical measurement circuits. This substitution dramatically simplifies the device structure while maintaining adequate measurement capability for home health care applications
Solution Approach 2:
The patent employs simple, inexpensive electrode sets that can be easily replaced or disposed of after use. These temporary electrodes attach to the subject's hands and feet for the measurement duration, providing a low-cost interface without requiring permanent or complex mounting structures
3Measurement precision
If dual energy X-ray absorptiometry (DXA) is used to measure bone mineral density, then measurement accuracy is improved, but ease of operation deteriorates due to hospital-based requirement
Solution Approach 1:
The patent enables the subject to perform the measurement themselves at home by simply attaching electrode sets to their hands and feet and following on-screen instructions. The device automatically guides the measurement process and calculates results, allowing individuals to monitor their own bone health without requiring hospital visits or professional operator assistance
Solution Approach 2:
The patent designs a compact, self-contained device that combines electrode sets, signal processing, and result display in a single unit suitable for home use. This universal design allows the device to function independently without requiring hospital infrastructure, making bone density measurement accessible to ordinary consumers in their own environments
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 bioelectrical impedance analyzer offers low-cost, rapid, and user-friendly bone mineral density assessment with personalized evaluation reports, enhancing personal health management.
Implementation Method 1
The electrode sets are attached to hands and feet of a subject to generate a bioelectrical signal. The signal processing unit is electrically connected to the electrode sets and configured to convert the bioelectrical signal into a resistance and a reactance of the subject.
Data Source
AI summary
A bioelectrical impedance analyzer includes a plurality of electrode sets attached to a subject to generate a bioelectrical signal, a signal processing unit electrically connected to the electrode sets and configured to convert the bioelectrical signal into a resistance and a reactance of the subject, and an estimation unit electrically connected to the signal processing unit and configured to obtain the bone mineral density of the subject according to the following formula: BMD=a+b×(R/H)+d×(Xc/H), where BMD represents the bone mineral density; a, b, and d are weighting coefficients; R represents the resistance of the subject; Xc represents the reactance of the subject; H represents a height of the subject. Accordingly, the bioelectrical impedance analyzer can achieve advantages of reducing measurement costs and rapid measurement.