New anatomical landmarks to study the relationship between fetal lung area and thoracic circumference by three-dimensional ultrasonography

New anatomical landmarks to study the relationship between fetal lung area and thoracic circumference by three-dimensional ultrasonography

Author Werneck Britto, Ingrid Schwach Google Scholar
Tedesco, Giselle Darahem Google Scholar
Silva Herbst, Sandra Rejane Google Scholar
Silva Bussamra, Luiz Claudio Autor UNIFESP Google Scholar
Andrade, Fernando Moreira de Google Scholar
Araujo Junior, Edward Autor UNIFESP Google Scholar
Machado Nardozza, Luciano Marcondes Google Scholar
Ruano, Rodrigo Google Scholar
Moron, Antonio Fernandes Autor UNIFESP Google Scholar
Aoki, Tsutomu Google Scholar
Institution Med Sci Coll Santa Casa São Paulo FCMSCSP
Universidade Federal de São Paulo (UNIFESP)
Baylor Coll Med
Abstract Objective: To evaluate the relation between total lung area (TLA) and thoracic circumference (TC) ratio by three-dimensional (3D) ultrasonography applying new anatomical landmarks as the fetal aorta and inferior angle of the scapula. Methods: A longitudinal prospective study was conducted with 56 uncomplicated pregnancies between 24 and 32 weeks of gestation. Polynomial regressions were used to evaluate the correlation between TC and gestational age (GA) as well as TC and estimated fetal weight (EFW). A simple linear regression was used to evaluate the correlation between TLA and Total thoracic area (TTA) and GA. the intraclass correlation coefficient (ICC) was used to assess the intra and interobserver variability. Results: 127 examinations were performed. TC values ranged from 150 to 174 mm (mean 166 mm) at 24 weeks and 215-248 mm (mean 231 mm) at 32 weeks. the TLA/TC ratio ranged from a mean of 0.64 at 24 weeks (range 0.56-0.70) to 0.90 at 32 weeks gestation (range 0.79-1.01). the intraobserver variability using the ICC was of 0.919 for TC; 0.916 for TTA; 0.860 for right lung area (RLA) and 0.910 for left lung area (LLA). Interobserver reproducibility was with an ICC of 0.970 for TC; 0.984 for RLA and 0.910 for LLA. Conclusions: Measurement of fetal TC and the relationship between TLA and TC by 3D-ultrasonography applying new anatomical landmarks shows good reproducibility and allows a new assessment of thoracic and lung growth.
Keywords Fetal lung area
fetal thoracic circumference
multiplanar mode
reference intervals
three-dimensional ultrasonography
Language English
Date 2012-10-01
Published in Journal of Maternal-fetal & Neonatal Medicine. London: Informa Healthcare, v. 25, n. 10, p. 1927-1932, 2012.
ISSN 1476-7058 (Sherpa/Romeo, impact factor)
Publisher Informa Healthcare
Extent 1927-1932
Origin http://dx.doi.org/10.3109/14767058.2012.667176
Access rights Closed access
Type Article
Web of Science ID WOS:000308953200020
URI http://repositorio.unifesp.br/handle/11600/35403

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