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Journal of Perinatal Medicine

Official Journal of the World Association of Perinatal Medicine

Editor-in-Chief: Dudenhausen, MD, FRCOG, Joachim W.

Ed. by Bancalari, Eduardo / Chappelle, Joseph / Chervenak, Frank A. / D'Addario , Vincenzo / Genc, Mehmet R. / Greenough, Anne / Grunebaum, Amos / Konje, Justin C. / Kurjak M.D., Asim / Romero, Roberto / Zalud, MD PhD, Ivica


IMPACT FACTOR 2018: 1.361
5-year IMPACT FACTOR: 1.578

CiteScore 2018: 1.29

SCImago Journal Rank (SJR) 2018: 0.522
Source Normalized Impact per Paper (SNIP) 2018: 0.602

Online
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1619-3997
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Volume 37, Issue 2

Issues

Reference range of fetal lung volume by 3D-ultrasonography using the rotational method (VOCAL)

Ingrid Schwach Werneck Britto
  • 1Department of Gynecology and Obstetrics, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil
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/ Luiz Cláudio de Silva Bussamra
  • 2Department of Gynecology and Obstetrics, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil
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/ Edward Araujo Júnior
  • 3Department of Obstetrics, São Paulo Federal University (UNIFESP-EPM), São Paulo, SP, Brazil
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/ Giselle Daharem Tedesco
  • 4Department of Gynecology and Obstetrics, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil
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/ Luciano Marcondes Machado Nardozza
  • 5Department of Obstetrics, São Paulo Federal University (UNIFESP-EPM), São Paulo, SP, Brazil
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/ Antonio Fernandes Moron
  • 6Department of Obstetrics, São Paulo Federal University (UNIFESP-EPM), São Paulo, SP, Brazil
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/ Tsutomu Aoki
  • 7Department of Gynecology and Obstetrics, Medical Science College of Santa Casa of São Paulo (FCMSCSP), São Paulo, SP, Brazil
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Published Online: 2008-11-10 | DOI: https://doi.org/10.1515/JPM.2009.023

Abstract

Aim: To determine reference ranges for fetal lung volume by 3-dimensional ultrasonography using the VOCAL (Virtual Organ Computed-aided Analysis) method.

Methods: A longitudinal prospective study was conducted with 61 uncomplicated pregnancies between 24 and 32 weeks of gestation. A separate measurement of both lungs volume was conducted by VOCAL with 30° rotation angle. For each gestational age, an average, standard deviation and maximal and minimal values were established in addition to the percentiles 5, 10, 25, 50, 75 and 90 for right and left lung volume. To evaluate the correlation between lung volume and gestational age, and estimated fetal weight, a polynomial regression with determination coefficient adjustment (R2) was used. The intra-observer reproducibility was evaluated by the intraclass correlation coefficient (ICC), whereas the inter-observer reproducibility was evaluated by Cronbach alpha statistic test.

Results: The average right lung volume varied from 12.5±0.7 cm3 at the 24th week to 31.8 cm3±1.8 cm3 at the 32nd week. The average left lung volume varied from 9.2±0.9 cm3 at the 24th week to 22.0 cm3±1.6 cm3 at the 32nd week. We observed a strong correlation between right lung volume and gestational age (R2=0.975) and estimated fetal weight (R2=0.905), as well as between the left lung volume with gestational age (R2=0.970) and estimated fetal weight (R2=0.908). We observed a good intra-observer reproducibility for the right lung volume (ICC=0.990) and for the left lung volume (ICC=0.986). Similarly, we observed good inter-observer reproducibility for right lung volume (0.975) and left lung volume (0.962).

Conclusion: Reference range of fetal lung volume by 3D-ultrasonography using the VOCAL method was determined.

Keywords: Fetal lung volume; nomogram; three-dimensional ultrasonography; VOCAL

About the article

Corresponding author: Edward Araujo Júnior Rua Carlos Weber 950 apto. 113 Visage Alto da Lapa São Paulo – SP CEP 05303-000 Brazil Tel./fax: +55-11-3294-3220


Received: 2008-05-27

Revised: 2008-08-01

Accepted: 2008-08-15

Published Online: 2008-11-10

Published Online: 2008-11-10

Published in Print: 2009-03-01


Citation Information: Journal of Perinatal Medicine, Volume 37, Issue 2, Pages 161–167, ISSN (Online) 1619-3997, ISSN (Print) 0300-5577, DOI: https://doi.org/10.1515/JPM.2009.023.

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