Air displacement plethysmography

Air displacement plethysmography or ADP (also known as whole-body air displacement plethysmography) is a recognized and scientifically validated densitometric method to measure human body composition.wikipedia
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Body composition

fat free massbody composition monitorsfat-free mass
Air displacement plethysmography or ADP (also known as whole-body air displacement plethysmography) is a recognized and scientifically validated densitometric method to measure human body composition.
The technique uses air as opposed to water and is known as air displacement plethysmography (ADP).

Hydrostatic weighing

hydrodensitometryBerman balance
ADP is based on the same principles as the gold standard method of hydrostatic weighing, but through a densitometric technique that uses air displacement rather than water immersion. Main Reference Methods (hydrostatic weighing, dual-energy X-ray absorptiometry, measurement of Total Body Water (TBW) by isotope dilution, measurement of total body potassium, and multi-compartment models

Boyle's law

compressedBoyleBoyle’s Gas Law
Boyle's law states that at a constant temperature, volume (V) and pressure (P) are inversely related.

Dual-energy X-ray absorptiometry

DEXAbone densitometrydual energy X-ray absorptiometry
Main Reference Methods (hydrostatic weighing, dual-energy X-ray absorptiometry, measurement of Total Body Water (TBW) by isotope dilution, measurement of total body potassium, and multi-compartment models

Isotope dilution

isotope dilution mass spectrometryIDMSreverse isotope dilution analysis
Main Reference Methods (hydrostatic weighing, dual-energy X-ray absorptiometry, measurement of Total Body Water (TBW) by isotope dilution, measurement of total body potassium, and multi-compartment models

Potassium

KK + potassium ion
Main Reference Methods (hydrostatic weighing, dual-energy X-ray absorptiometry, measurement of Total Body Water (TBW) by isotope dilution, measurement of total body potassium, and multi-compartment models

Multi-compartment model

Compartmentalcompartmental modelcompartmental modelling
Main Reference Methods (hydrostatic weighing, dual-energy X-ray absorptiometry, measurement of Total Body Water (TBW) by isotope dilution, measurement of total body potassium, and multi-compartment models

Deuterium

deuterondeuteronsD
Deuterium method (in infants)

COSMED

In 2011, COSMED USA, Inc. completed the acquisition of US company Life Measurement, Inc. (LMI), provider of body composition assessment equipment based on Air Displacement Plethysmography technology.