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Bioelectrical impedance vector analysis (BIVA) in stable preterm newborns.
MedLine Citation:
PMID:  22717500     Owner:  NLM     Status:  In-Data-Review    
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.
Ana Vitoria Barban Margutti; Carolina Reis Bustamante; Maísa Sanches; Marina Padilha; Rebeca Antunes Beraldo; Jacqueline Pontes Monteiro; José Simon Camelo
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Jornal de pediatria     Volume:  88     ISSN:  1678-4782     ISO Abbreviation:  J Pediatr (Rio J)     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-06-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985188R     Medline TA:  J Pediatr (Rio J)     Country:  Brazil    
Other Details:
Languages:  eng     Pagination:  253-8     Citation Subset:  IM    
Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo (USP), Ribeirão Preto, SP, Brazil.
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