Bioelectrical impedance spectroscopy for the assessment of body fluid volumes of term neonates

Ferreira, Denis; Souza, M.N.

doi:10.1590/s0100-879x2004001100002

Cited by 18 publications

(14 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The measured impedance, corrected for the reactive component, known as electrical resistance is inversely and quantitatively related to the volume of conductive compartment which can be used to calculate total body water (TBW) and estimate fat-free mass (FFM) and fat mass (FM) (2). BIS provides reliable estimates of TBW in adults and equations have been developed for children and infants (3,4). While in very young infants (<5 mo) BIS is associated with poorer predictive performance that could be due to the higher conductivity of the infant's adipose tissue with its increased vascularization and water content, and rapidly changing hydration status caused by feeding patterns (4-6), small bias indicates that BIS is suitable for comparison between groups and for longitudinal studies (4).…”

mentioning

confidence: 99%

Determinants of body composition in breastfed infants using bioimpedance spectroscopy and ultrasound skinfolds—methods comparison

et al. 2016

View full text Add to dashboard Cite

Background: Accurate, noninvasive, and inexpensive methods are required to measure infant body composition. Ultrasound (US) and bioimpedance spectroscopy (BIS) have been validated in adults and introduced in pediatric populations. The aim of this study was to evaluate the performance of both methods in determining percentage fat mass (%FM) in breastfed infants. Methods: %FM of 2, 5, 9, and 12 mo-old healthy, breastfed term infants (n = 58) was calculated using BIS-derived total body water equations and skinfold equations then compared with reference models. Skinfolds were measured with US at two and four sites (biceps, suprailiac and/or triceps, and subscapular). results: %FM differed widely within and between methods, with the degree of variation affected by infant age/sex. Not a single method/equation was consistent with the distributions of appropriate reference values for all age/sex groups. Moderate number of matches with references values (13-24 out of 36) was seen for both types of equations. High number of matches (25-36) was seen for US skinfold-based equations. %FM values calculated from US and BIS were not significantly different (P = 0.35). conclusion: Both BIS and US are practical for predicting %FM in infants. BIS calculations are highly dependent upon an appropriate set of validated age-matched equations. Body composition (BC) in early life plays an important role in the programming of long-term health outcomes including obesity, type II diabetes, and cardiovascular disease (1). The majority of large studies reporting an association of infant development with disease later in life use anthropometric measurements or BMI to monitor growth that provide limited indices of adiposity as they fail to reflect body shape, fat distribution, and density.The number of techniques available to assess infant BC is increasing. These measures have better accuracy than anthropometric measurements, but may be either time consuming, expensive, and invasive, expose infants to low levels of radiation (dual-energy X-ray absorptiometry and computed tomography), require the infant to be restrained (magnetic resonance imaging) or have weight restriction (air displacement plethysmography).Bioelectrical impedance spectroscopy (BIS) is noninvasive and often used to estimate BC due to its ease of application and low cost. BIS measures the electrical impedance, or opposition to flow through the body tissues of a small harmless electric current. The measured impedance, corrected for the reactive component, known as electrical resistance is inversely and quantitatively related to the volume of conductive compartment which can be used to calculate total body water (TBW) and estimate fat-free mass (FFM) and fat mass (FM) (2). BIS provides reliable estimates of TBW in adults and equations have been developed for children and infants (3,4). While in very young infants (<5 mo) BIS is associated with poorer predictive performance that could be due to the higher conductivity of the infant's adipose tissue with its increased vascularizat...

show abstract

mentioning

confidence: 99%

Determinants of body composition in breastfed infants using bioimpedance spectroscopy and ultrasound skinfolds—methods comparison

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Studies in preterm and term infants have shown it to predict TBW accurately [39,40,41]. However, the rapid fluxes in TBW in preterm and newborn infants mean that its ability to accurately predict body composition in terms of FFM and FM is limited.…”

Section: Body Composition Methods Suitable For Paediatric Usementioning

confidence: 99%

Assessing Early Growth and Adiposity: Report from an EarlyNutrition Academy Workshop

Ward

Poston²,

Godfrey³

et al. 2013

Ann Nutr Metab

View full text Add to dashboard Cite

This report provides a summary of a workshop organised by the European Commission-funded EarlyNutrition Project and the EarlyNutrition Academy. Accurate and reliable methods to assess body composition are needed in research on prenatal and early post-natal influences of nutrition on later health because common surrogate measures of maternal and offspring adiposity (body fat content), such as body mass index (BMI), have relatively poor predictive power for the risk of later disease. The key goals of the workshop were to discuss approaches to assess growth and body composition from pregnancy to adolescence, to summarise conclusions and to prepare a framework for research in the EarlyNutrition Project. The participants concluded that there is a pressing need to harmonise the methodologies for assessing body composition, recognising that each has advantages and limitations. Essential core measurements across studies assessing early growth and body composition were identified, including weight, length, BMI, waist and mid-upper arm circumference, subscapular and triceps skinfold thicknesses, and bioelectrical impedance analysis. In research settings with access to more sophisticated technologies, additional methods could include dual-energy X-ray absorptiometry, peripheral quantitative computed tomography, ultrasound assessment of regional body fat, magnetic resonance imaging (MRI), air displacement plethysmography (ADP), and deuterium dilution. These provide richer data to answer research questions in greater depth but also increase costs. Where overall whole-body composition is the primary outcome measure, ADP or tracer dilution should be used whenever possible. Where regional distribution of body fat is of greater interest, an imaging technique such as MRI is preferred.

show abstract

“…Como, nos primeiros 28 dias de vida, o turnover de água no RN é muito grande, o mesmo torna-se susceptível a distúrbios hidroeletrolíticos. Conhecer detalhadamente a composição corporal durante o período pós-natal tardio pode ser importante para o cuidado nutricional e o tratamento 6,7 .…”

Section: Introductionunclassified

Bioelectrical impedance vector analysis (BIVA) in stable preterm newborns

Margutti¹,

Bustamante²,

Sanches³

et al. 2012

J Pediatr (Rio J)

View full text Add to dashboard Cite

Objective: To observe the behavior of the plotted vectors on the RXc (R -resistance -and Xc -reactance corrected for body height/ length) graph through bioelectrical impedance analysis (BIVA) and phase angle (PA) values in stable premature infants, considering the hypothesis that preterm infants present vector behavior on BIVA suggestive of less total body water and soft tissues, compared to reference data for term infants.Methods: Cross-sectional study, including preterm neonates of both genders, in-patients admitted to an intermediate care unit at a tertiary care hospital. Data on delivery, diet and bioelectrical impedance (800 mA, 50 kHz) were collected. The graphs and vector analysis were performed with the BIVA software.Results: A total of 108 preterm infants were studied, separated according to age (< 7 days and ≥ 7 days). Most of the premature babies were without the normal range (above the 95% tolerance intervals) existing in literature for term newborn infants and there was a tendency to dispersion of the points in the upper right quadrant, RXc plan. The PA was 4.92° (±2.18) for newborns < 7 days and 4.34° (±2.37) for newborns ≥ 7 days. Conclusion:Premature infants behave similarly in terms of BIVA and most of them have less absolute body water, presenting less fat free mass and fat mass in absolute values, compared to term newborn infants.J Pediatr (Rio J). 2012;88(3):253-8: Premature infant, newborn infant, electrical impedance, body composition. ResumoObjetivo: Observar o comportamento dos vetores ponteados no gráfico de resistência e de reactância corrigidos pelo comprimento corporal (RXc) através da análise vetorial de impedância bioelétrica (BIVA) e os valores de ângulo de fase (AF) em recém-nascidos (RNs) pré-termo estáveis, considerando a hipótese que o RN pré-termo apresenta o seu comportamento vetorial na BIVA sugestivo de menor quantidade de água e de tecidos moles corporais, comparativamente à referência do RN a termo.Métodos: Foi realizado estudo de corte transversal em RNs pré-termo, de ambos os sexos, que se encontravam em uma unidade de cuidados intermediários de um hospital terciário. Coletaram-se dados relacionados ao nascimento e à alimentação, bem como dados de bioimpedância elétrica (800 mA, 50 kHz). Os gráficos e as análises vetoriais foram realizados através do BIVA software.Resultados: Um total de 108 RNs pré-termo foram estudados, separados por faixa etária (< 7 dias e ≥ 7 dias). A maioria dos RNs pré-termo encontrou-se fora da normalidade (acima dos intervalos de tolerância de 95%) existentes na literatura para RNs a termo, e observou-se uma tendência para a dispersão dos pontos no quadrante superior direito no gráfico RXc. O AF dos RNs < 7 dias foi de 4,92° (±2,18), e a dos RNs ≥ 7 dias, de 4,34° (±2,37). Conclusão:Os RNs pré-termo se comportam de maneira semelhante entre si. A maioria deles possui menor quantidade absoluta de água corporal e apresenta menor quantidade tanto de massa livre de gordura quanto de massa gorda, em valores absolutos, quando comparados com os...

show abstract

Bioelectrical impedance spectroscopy for the assessment of body fluid volumes of term neonates

Cited by 18 publications

References 35 publications

Determinants of body composition in breastfed infants using bioimpedance spectroscopy and ultrasound skinfolds—methods comparison

Determinants of body composition in breastfed infants using bioimpedance spectroscopy and ultrasound skinfolds—methods comparison

Assessing Early Growth and Adiposity: Report from an EarlyNutrition Academy Workshop

Bioelectrical impedance vector analysis (BIVA) in stable preterm newborns

Contact Info

Product

Resources

About