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Related Experiment Videos

Nutritional assessment with body composition measurements.

H M Shizgal1

  • 1Department of Surgery, McGill University, Montreal, Quebec, Canada.

JPEN. Journal of Parenteral and Enteral Nutrition
|September 1, 1987
PubMed
Summary

Multiple isotope dilution accurately measures body composition, revealing malnutrition impacts body cell mass (BCM) and extracellular mass (ECM). Specific caloric intake is needed to restore BCM, but the method is best for research, not routine patient care.

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Nutritional assessment with body composition measurements by multiple isotope dilution.

Infusionstherapie (Basel, Switzerland)·1990

Area of Science:

  • Biomedical Engineering
  • Human Physiology
  • Nutritional Science

Background:

  • Accurate body composition assessment is crucial for understanding nutritional status and response to interventions.
  • Traditional methods may lack precision in differentiating key body compartments.
  • Malnutrition significantly alters body composition, impacting body cell mass (BCM) and extracellular mass (ECM).

Purpose of the Study:

  • To develop and validate a multiple isotope dilution technique for precise body composition measurement.
  • To define normal body composition parameters in healthy adults.
  • To investigate the relationship between caloric intake and body composition changes, particularly BCM, during nutritional support.

Main Methods:

  • Utilized a multiple isotope dilution technique to measure body fat, extracellular mass (ECM), and body cell mass (BCM).

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  • Collected data from 25 healthy volunteers to establish normal body composition ranges.
  • Applied the technique to assess the impact of total parenteral nutrition on body composition.

    • Main Results:

    • The technique accurately quantifies body fat, ECM, and BCM.
    • Malnutrition is characterized by decreased BCM and increased ECM, with lean body mass often remaining unchanged.
    • A caloric intake of 30-40 cal/kg/day is necessary for BCM maintenance, with higher intake required for restoration.
    • A statistically significant relationship was found between caloric intake and BCM changes.

    Conclusions:

    • Multiple isotope dilution offers a precise method for assessing body composition and nutritional status.
    • Understanding body composition changes is vital for effective nutritional support strategies.
    • Due to complexity, this method is best suited for research rather than routine clinical management.