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Body Water Content and Fluid Compartments01:19

Body Water Content and Fluid Compartments

Life's biochemical processes occur within aqueous solutions. Solutes are substances that are dissolved within these solutions. The human body contains a variety of solutes, which can differ across various body parts. These can encompass proteins—such as those responsible for clotting and carbohydrate transport—as well as electrolytes. In medicine, an electrolyte is often described as a mineral ion derived from a salt possessing an electric charge. Examples include sodium ions (Na+) and chloride...

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Comparison of Body Composition Methods for Estimating Body Fat Percentage in Lower Limb Prosthesis Users.

J D Smith1, G Guerra2, T B Symons1

  • 1Department of Counseling, Health and Kinesiology, College of Education and Human Development, Texas A&M University-San Antonio, San Antonio, Texas, USA.

Canadian Prosthetics & Orthotics Journal
|June 14, 2024
PubMed
Summary

Air Displacement Plethysmography (ADP) and Dual-energy X-ray Absorptiometry (DXA) show comparable body fat measurements in lower limb prosthesis users. This study validates ADP for assessing body composition in this population.

Keywords:
ADPAir Displacement PlethysmographyAmputationBody CompositionBody FatDXADual-Energy X-Ray AbsorptiometryProsthesis

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Area of Science:

  • Biomedical Engineering
  • Human Physiology
  • Rehabilitation Science

Background:

  • Limited research exists on the accuracy of Air Displacement Plethysmography (ADP) versus Dual-energy X-ray Absorptiometry (DXA) for body composition in lower limb amputees.
  • Establishing the validity of ADP in this population is crucial for accurate health assessments.

Purpose of the Study:

  • To compare body composition measurements between ADP (BOD POD®) and DXA in individuals with lower limb amputations.
  • To assess the influence of wearing or not wearing a prosthesis on these measurements.

Main Methods:

  • Eleven lower limb prosthesis users underwent body composition analysis using both ADP and DXA.
  • Measurements were taken with and without their prostheses to evaluate potential differences.

Main Results:

  • No significant differences in body composition were found between ADP and DXA, regardless of prosthesis use.
  • Body fat percentage showed no significant variation with or without prostheses for either method.
  • The agreement between ADP and DXA was highest when participants were not wearing their prostheses, though Bland-Altman plots indicated good agreement even with prostheses.

Conclusions:

  • This study is the first to compare total body fat percentage between BOD POD® (ADP) and DXA in lower limb prosthesis users.
  • The findings suggest that BOD POD® provides valid body fat percentage indices for this population.
  • Future research can utilize ADP for monitoring body composition changes during rehabilitation interventions.