Document Detail

New anatomical landmarks to study the relationship between fetal lung area and thoracic circumference by three-dimensional ultrasonography.
MedLine Citation:
PMID:  22372878     Owner:  NLM     Status:  MEDLINE    
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.
Ingrid Schwach Werneck Britto; Giselle Darahem Tedesco; Sandra Rejane Silva Herbst; Luiz Cláudio Silva Bussamra; Fernando Moreira de Andrade; Edward Araujo Júnior; Luciano Marcondes Machado Nardozza; Rodrigo Ruano; Antonio Fernandes Moron; Tsutomu Aoki
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Publication Detail:
Type:  Journal Article     Date:  2012-03-28
Journal Detail:
Title:  The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians     Volume:  25     ISSN:  1476-4954     ISO Abbreviation:  J. Matern. Fetal. Neonatal. Med.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-09-18     Completed Date:  2013-03-17     Revised Date:  2013-04-11    
Medline Journal Info:
Nlm Unique ID:  101136916     Medline TA:  J Matern Fetal Neonatal Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  1927-32     Citation Subset:  IM    
Department of Obstetrics and Gynecology, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil.
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MeSH Terms
Fetal Development*
Fetus / anatomy & histology*
Gestational Age
Imaging, Three-Dimensional*
Linear Models
Longitudinal Studies
Lung / anatomy & histology,  embryology*,  ultrasonography
Observer Variation
Prospective Studies
Reference Values
Thorax / anatomy & histology,  embryology*,  ultrasonography
Ultrasonography, Prenatal*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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