INTRODUCTION Determine body composition changes in adiposity can assess an individual. OBJECTIVE The objective of this study was to evaluate total body fat percentage based on two and four compartment models in obese Chilean school children, adjusting for differences in sex and puberty status. METHODS Sixty-one obese school children (33 boys and 28 girls) between 8 and 13 years of age were ...

BACKGROUND Accurately estimating fat percentage is important for assessing health and determining treatment course. Methods of estimating body composition such as hydrostatic weighing or dual-energy x-ray absorptiometry (DXA), however, can be expensive, require extensive operator training, and, in the case of hydrostatic weighing, be highly burdensome for patients. Our objective was to evaluate...

BACKGROUND: To investigate the effect of body temperature and moisture on body fat (%fat), volume and density by air-displacement plethysmography (BOD POD). METHODS: %fat, body volume and density by the BOD POD before (BOD PODBH) and immediately following hydrostatic weighing (BOD PODFH) were performed in 32 healthy females (age (yr) 33 +/- 11, weight (kg) 64 +/- 14, height (cm) 167 +/- 7). Bod...

Estrogen is necessary for the expression of phrenic long-term facilitation (pLTF) in female rats. pLTF, a well-studied model respiratory neuroplasticity, characterized by progressive increase nerve amplitude following acute intermittent hypoxia (AIH). Gonadally-intact, adult rats only develop pLTF stages estrous cycle with high levels circulating estrogen. Removal ovaries (ovariectomy, OVX), pr...

BACKGROUND & AIMS Determine the accuracy of body density (Db) estimated with upper-body skinfold thickness (SFT) measurements compared to air-displacement plethysmography (ADP) and ascertain whether body mass index (BMI) impacts the accuracy of SFT to assess Db. METHODS We estimated Db with SFT and ADP in 131 healthy men and women with normal (N; 18.5-24.9kg/m(2)), overweight (OW; 25-29.9kg/m...

Positive airway pressure (Paw) during high-frequency oscillatory ventilation (HFOV) increases lung volume and can lead to lung overdistention with potentially serious adverse effects. To date, no method is available to monitor changes in lung volume (DeltaVL) in HFOV-treated infants to avoid overdistention. In five newborn piglets (6-15 days old, 2.2-4.2 kg), we investigated the use of direct c...

BACKGROUND Computerised x-ray planimetry has been advocated as an alternative to body plethysmography and helium dilution for measuring static lung volumes. The accuracy and reproducibility of this method has been assessed in comparison with these standard methods. METHODS Plethysmographic and planimetric measurements of total lung capacity (TLC) and functional residual capacity (FRC) were ma...