Body composition of preterm infants measured during the first months of life: bioelectrical impedance provides insignificant additional information compared to anthropometry alone

Dũng, Nguyễn Quang; Fusch, Gerhard; Armbrust, S.; Jochum, Frank; Fusch, Christoph

doi:10.1007/s00431-006-0232-y

Cited by 38 publications

(37 citation statements)

References 22 publications

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“…In small studies of term and preterm neonates body weight had the best correlation with fat free mass measured with dual energy x-ray absorptiometry (DEXA). 50, 51 …”

Section: Discussionmentioning

confidence: 99%

Normative Left Ventricular M-Mode Echocardiographic Values in Preterm Infants up to 2 kg

Choudhry

Salter

Cunningham

et al. 2017

Journal of the American Society of Echocardiography

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Background There is a paucity of normative echocardiographic data in preterm infants. The objectives of this study were: (1) derive left ventricular (LV) M-mode reference values, and (2) compare the performance of alternative methods of indexing LV dimensions and mass (LVM) in preterm infants. We propose that indexing LV measures to weight in preterm infants is a practical approach given the variability associated with tape-measure length measurement in infants. Methods In this retrospective study LV M-mode echocardiographic measurements of end diastolic interventricular septal thickness (IVSd), end diastolic LV posterior wall thickness (LVPWd), LV end diastolic and systolic dimensions (LVEDD, LVESD), LVM, and relative wall thickness (RWT) were remeasured in 503 hospitalized preterm infants ≤ 2 Kg (372 from a retrospective sample and 131 prospectively enrolled). Measures for all variables did not differ between retrospective and prospective samples so results were pooled. LV dimensions and LVM indexed for weight, length, and body surface area (BSA) sex-specific centile curves and corresponding Z scores were generated using Cole’s lambda-mu-sigma method. Threshold limits (10th, and 80th percentile; P10, P80) were used to generate RWT normative range. Results Sex-specific centile curves using LVM, IVSd, LVPWd, LVEDD, and LVESD indexed to weight were similar to the curves generated using length and BSA. The mean [P10, P80] normal range for RWT was 0.33 (0.26, 0.38). Conclusions From this large cohort of preterm infants, we developed LV M-mode dimension and LVM centile curves indexed to weight as a practical method to assess LV morphology in preterm infants.

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“…In small studies of term and preterm neonates body weight had the best correlation with fat free mass measured with dual energy x-ray absorptiometry (DEXA). 50, 51 …”

Section: Discussionmentioning

confidence: 99%

Normative Left Ventricular M-Mode Echocardiographic Values in Preterm Infants up to 2 kg

Choudhry

Salter

Cunningham

et al. 2017

Journal of the American Society of Echocardiography

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“…For instance, FM and percent FM from total body electrical conductivity (TOBEC), a whole-body variant of BIA no longer commercially available (Hashimoto et al, 2002), and from BIA using existing equations (Sen et al, 2010) had poor correlation with estimates from isotope dilution. In both preterm (Dung et al, 2007) and term (Hashimoto et al, 2002; Lingwood et al, 2012) infants, BIA improves the prediction of FFM and percent body fat only very slightly, if at all, beyond simple anthropometrics (weight and length). Lingwood has published a review focused on the strengths and weaknesses of BIA for TBW and body composition assessment in infants (Lingwood, 2013).…”

Section: Bioelectrical Impedance Analysis (Bia)mentioning

confidence: 99%

Body composition assessment in the infant

Demerath

Fields

2014

American J Hum Biol

173

187

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Body composition assessment provides a sharper picture of the human biological response to genetic and environmental influences than measures of body size and weight. Infant body composition is particularly important as a marker of fetal adaptation and developmental programming of subsequent health and disease, but until recently, the range of options for measuring infant body composition was relatively narrow. The purpose of this Toolkit: Methods in Human Biology review is to provide a comprehensive overview of methods of body composition methods currently used in infants 0 to 2 years of age, including anthropometric prediction equations, air displacement plethysmography (ADP), dual energy X-ray absorptiometry (DXA), bioelectrical impedance analysis (BIA), isotope dilution, and magnetic resonance imaging (MRI). Information on the reliability, validity, and accuracy of the methods is provided. Unique aspects of infant physiology and behavior create challenges for body composition assessment, but this review provides guidance on suitable testing approaches and environments that may aid researchers in this important area of investigation.

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“…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)

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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...

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Body composition of preterm infants measured during the first months of life: bioelectrical impedance provides insignificant additional information compared to anthropometry alone

Abstract: In preterm neonates, weight is a more effective predictor of FFM than impedance index. The study provides a bedside procedure for estimating FFM, mainly based on anthropometric parameters rather than BIA.

Cited by 38 publications

References 22 publications

Normative Left Ventricular M-Mode Echocardiographic Values in Preterm Infants up to 2 kg

Normative Left Ventricular M-Mode Echocardiographic Values in Preterm Infants up to 2 kg

Body composition assessment in the infant

Bioelectrical impedance vector analysis (BIVA) in stable preterm newborns

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