Yolk sac volume assessed by three-dimensional ultrasonography using the VOCAL method

Yolk sac volume assessed by three-dimensional ultrasonography using the VOCAL method

Author Rolo, Liliam Cristine Autor UNIFESP Google Scholar
Machado Nardozza, Luciano Marcondes Autor UNIFESP Google Scholar
Araujo, Edward Autor UNIFESP Google Scholar
Nowak, Paulo Martin Autor UNIFESP Google Scholar
Moron, Antonio Fernandes Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Objectives. Establish normative data for yolk sac volume (YSV) at 7 - 10 weeks of gestation assessed by transvaginal three-dimensional ultrasonography (3D-US) using the VOCAL method and analyze its correlation with gestational age (GA) and crown-rump length (CRL). Methods. A cross-sectional study involving 62 normal pregnancies was performed to assess YSV from 7 to 10 weeks of gestational age. An endocavitary volumetric transducer (3D5-8EK) was used for all measurements. the VOCAL (Virtual Organ Computer-aided AnaLysis) method with a 30 rotation angle was used for volumetric calculations. Regression models were constructed to analyze the correlation between YSV and GA or CRL the mean, standard deviation, median, minimum and maximum values were calculated for each gestational age. Results. There was a poor correlation between YSV and GA or CRL. the quadratic regression was the model that best expressed the correlation between these variables: R2=0.188 for GA and R2=0.203 for CRL. the mean YSV went from 0.063 cm(3) (95% CI: 0.047; 0.080) at 7 weeks to 0.164 cm(3) (95% CI 0.095; 0.232) at 10 weeks. Conclusion. Reference limits were generated for first trimester YSV using 3D-US. There was a poor correlation between YSV and GA or CRL.
Keywords yolk sac
first trimester of pregnancy
crown-rump length
nomograms
three-dimensional imaging
Language English
Date 2008-01-01
Published in Acta Obstetricia Et Gynecologica Scandinavica. Malden: Wiley-Blackwell, v. 87, n. 5, p. 499-502, 2008.
ISSN 0001-6349 (Sherpa/Romeo, impact factor)
Publisher Wiley-Blackwell
Extent 499-502
Origin http://dx.doi.org/10.1080/00016340802011595
Access rights Closed access
Type Article
Web of Science ID WOS:000255440900003
URI http://repositorio.unifesp.br/handle/11600/30306

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