Preliminary evaluation of a new pediatric air displacement plethysmograph for body composition assessment in infants

Abstract

A preliminary evaluation of a new air displacement plethysmography (ADP) system for body composition assessment in infants was performed on 17 subjects on 2 consecutive days. Mean (+/-SD) percent body fat (%BF) obtained from test 1 on day 1, and tests 1 and 2 on day 2 was 23.21+/-7.63, 22.94+/-7.50, and 22.55+/-7.61, respectively. Mean differences in %BF of within- (-0.39+/-0.81) and between-day tests (-0.27+/-0.97) did not significantly differ from zero. %BF 95% limits of agreements were very close (-2.0-1.2, and -2.2-1.7 for within- and between-day tests, respectively). %BF SDs (0.52 and 0.60 %BF for within- and between-day reliability, respectively) were not a function of the subject's behavioral state, body weight, or %BF. Mean %BF obtained from the 3 tests (22.90+/-7.56) was comparable with expected %BF values calculated using data from multi-compartment studies (25.84+/-8.39 and 21.93+/-4.46).

QMR: validation of an infant and children body composition instrument using piglets against chemical analysis

“…The infant size instrument (PeaPod, weight limit of 8 kg) has been validated in several studies. 5,4,[38][39][40] The procedure is easy, quick and results in excellent body fat measurement precision. …”

Exploratory study of the relationship of fat-free mass to speed of brain processing in preterm infants

“…A detailed explanation of the PEA POD's design, operating principles, validation, and measurement procedures is presented elsewhere (32)(33)(34)(35)(36). The PEA POD uses the principles of whole-body densitometry to derive fat and FFM values using body density, fat mass density (0.9007 g/ml), and known ageand sex-specific FFM density values (37); this technique has been validated in preterm infants (38).Using the integrated electronic scale of the PEA POD, a 20-s infant body mass measurement is followed by a 2 min infant body volume measurement in the test chamber.…”

Is body fat percentage a better measure of undernutrition in newborns than birth weight percentiles?

“…Recently, a new technology using air displacement plethysmography (ADP) has become available to noninvasively, accurately, and quickly measure BF% in infants from birth to 6 mo of age. ADP has been validated against the four-compartment model and biological and physical phantoms (13) and is considered the criterion method for determining BF% in neonates (14)(15)(16)(17)(18). Several studies have investigated the BF% as the indicator of neonatal nutritional status using ADP (13,(19)(20)(21).…”