Bioimpedance Vector Analysis for Bone Mineral Density Evaluation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current bone mineral density evaluation methods, such as dual energy X-ray absorptiometry (DXA), are costly, time-consuming, and not suitable for home health care due to their high expense and requirement for specialized equipment and settings.
Innovation Solution
A method utilizing bioimpedance vector analysis technology to evaluate local or whole body bone mineral density by measuring resistance and reactance with a bioimpedance measuring instrument, calculating specific values, and comparing them to a bioimpedance vector analysis chart to determine bone mineral density.
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 measurement system with a bioimpedance-based electrical measurement system. By using current flow through body tissues and measuring impedance characteristics, the invention achieves bone mineral density evaluation without requiring expensive X-ray equipment, thereby reducing both cost and measurement time while maintaining acceptable accuracy
Solution Approach 2:
The patent changes the measurement parameters from X-ray absorption coefficients to electrical impedance parameters (resistance and reactance). By measuring the real and imaginary components of body impedance at specific frequencies and combining these with height data, the system transforms the measurement approach to achieve comparable clinical utility with simplified equipment
2Measurement precision
If dual energy X-ray absorptiometry (DXA) is used to measure bone mineral density, then measurement accuracy is improved, but cost increases
Solution Approach 1:
The patent employs inexpensive bioimpedance measurement components instead of costly DXA equipment. The system uses standard electrical measurement circuits, frequency generators, and data processing capabilities that are far more affordable than medical-grade X-ray systems, making bone density screening accessible for home use and large-scale population studies
Solution Approach 2:
The invention substitutes the complex X-ray generation and detection machinery with simple electrical impedance measurement circuits. This replacement dramatically reduces manufacturing costs and equipment complexity while preserving the essential function of assessing bone mineral content through tissue property measurements
3Measurement precision
If dual energy X-ray absorptiometry (DXA) is used to measure bone mineral density, then measurement accuracy is improved, but device complexity and operational requirements increase
Solution Approach 1:
The patent replaces the complex DXA equipment requiring specialized facilities with a simple bioimpedance device that can operate in any environment. The measurement system reduces to basic electrical components (current source, impedance meter, frequency generator) and standard data processing, eliminating the need for X-ray shields, specialized rooms, and trained radiologists
4Measurement precision
If dual energy X-ray absorptiometry (DXA) is used to measure bone mineral density, then measurement accuracy is improved, but ease of use decreases
Solution Approach 1:
The invention replaces the cumbersome DXA procedure requiring hospital visits with a convenient home-based measurement. The bioimpedance device can be used in ordinary settings without special preparation, and the measurement process is simplified to basic electrical measurements combined with height input, making it as convenient as other home health monitoring devices
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 method is low in cost, fast, and convenient, allowing for efficient evaluation of bone mineral density in various settings, including home health care, while maintaining accuracy comparable to DXA measurements.
Implementation Method 1
Measure the resistance (R) and reactance (Xc) of a subject with a bioimpedance measuring instrument
Data Source
Figure 1
Figure 2
Figure 3a
AI summary
A method of bioimpedance vector analysis technology to evaluate local or whole body bone mineral density (10) includes the steps of (a) measuring the resistance and reactance of a subject with a bioimpedance measuring instrument (20), obtaining the height of the subject, and then dividing the height of the subject by the resistance to obtain a first value and dividing the height of the subject by the reactance to obtain a second value, and (b) comparing the first value and the second value with a bioimpedance vector analysis chart to evaluate the local or whole body bone mineral density of the subject. This method is convenient to use.