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Simplified body-composition analysis using deuterium dilution and deuteron photodisintegration
Aviation, Space, and Environmental Medicine
|August 1, 1976
Summary
A new method simplifies deuterium oxide (D2O) measurement for accurate human body composition analysis. This technique offers a safe, cost-effective, and convenient approach for assessing body water, lean mass, and fat.
Area of Science:
- Biomedical Engineering
- Nuclear Physics
- Human Physiology
Background:
- Accurate human body composition assessment is crucial but limited by existing methods.
- Deuterium dilution is a valid technique for body composition but complex to perform.
- Measuring low deuterium concentrations has historically restricted its widespread use.
Purpose of the Study:
- To present a simplified and accessible method for quantifying deuterium in body fluid samples.
- To expand the application of deuterium dilution for body composition studies.
- To overcome the technical complexities associated with low-level deuterium measurement.
Main Methods:
- Quantification of deuterons via neutron emission induced by gamma-ray irradiation from 228Th.
- In vitro validation demonstrating coefficients of variation under 1% and near 100% recovery.
- In vivo comparison with tritium dilution in 38 subjects.
Main Results:
- The simplified deuterium quantification method shows high accuracy and reproducibility.
- In vitro assays achieved coefficients of variation below 1% and excellent D2O recovery.
- In vivo studies showed close agreement with the established tritium dilution method.
Conclusions:
- This simplified deuterium quantification technique enhances the feasibility of D2O dilution for body composition analysis.
- The method is cost-effective, requires minimal patient inconvenience, and simplifies sample analysis.
- It enables smaller medical facilities to utilize advanced body composition assessment techniques.