Evaluation of Placental Volume at 7-10+6 Weeks of Pregnancy by 3D-Sonography

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dc.contributor.authorNardozza, L. M. M. [UNIFESP]
dc.contributor.authorNowak, P. M. [UNIFESP]
dc.contributor.authorAraujo Junior, E. [UNIFESP]
dc.contributor.authorGuimaraes Filho, H. A. [UNIFESP]
dc.contributor.authorRolo, L. C. [UNIFESP]
dc.contributor.authorTorloni, M. R. [UNIFESP]
dc.contributor.authorMoron, A. F. [UNIFESP]
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.date.accessioned2016-01-24T13:52:41Z
dc.date.available2016-01-24T13:52:41Z
dc.date.issued2009-07-01
dc.description.abstractThe aim of the study was to establish normative data for placental volume (PV) at 7-10+6 weeks of gestation using three-dimensional ultrasound (3DUS). the cross-sectional study involved 70 healthy pregnancies between 7 and 11 weeks. the VOCAL (Virtual Organ Computer-aided Analysis) method with a 30 rotation angle and six planes was used for volumetric calculations. Regression models were constructed to assess the correlation between PV and crown-rump length (CRL) adjusted by the determination coefficient (R(2)). the method proposed by Royston and Wright was used to establish the 2.5th; 10th; 50th; 90th and 97.5th percentiles (percentile = mean + K x SD). the intraclass correlation coefficient (ICC), Bland-Altman graphs and Student's paired t-tests were used to assess intra- and interobserver variability. PV ranged from 1.7 to 42.6 cm(3), with a mean of 13.6 cm(3) ( 9A cm(3)). There was a strong correlation between PV and CRL; the exponential equation was the model that best expressed the correlation between them (R(2) = 0.76). for CRL between 9 and 40 mm, the mean PV increased 10.5 times, while CRL increased only 4.4 times. Inter- and intraobserver correlation were excellent (ICC=0.979 and 0.971, respectively). Bland-Altman graphs indicated a good reproducibility with a mean intraobserver and interobserver difference of 0.2 cm(3) (95% CI: -0.7-1.2 cm(3)) and -0.2 cm(3) (95% CI: -1.3-0.9 cm(3)), respectively. Reference limits were generated for first trimester PV assessed by 3DUS using the VOCAL method. There is a strong correlation between PV and CRL Placental volume obtained through this method was highly reproducible. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.en
dc.description.affiliationSão Paulo Fed Univ UNIFESP, Dept Obstet, BR-05303000 São Paulo, Brazil
dc.description.affiliationUnifespSão Paulo Fed Univ UNIFESP, Dept Obstet, BR-05303000 São Paulo, Brazil
dc.description.sourceWeb of Science
dc.format.extent585-589
dc.identifierhttp://dx.doi.org/10.1016/j.placenta.2009.04.008
dc.identifier.citationPlacenta. London: W B Saunders Co Ltd, v. 30, n. 7, p. 585-589, 2009.
dc.identifier.doi10.1016/j.placenta.2009.04.008
dc.identifier.issn0143-4004
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/31651
dc.identifier.wosWOS:000268009100004
dc.language.isoeng
dc.publisherW B Saunders Co Ltd
dc.relation.ispartofPlacenta
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectEarly placental phaseen
dc.subjectFirst trimester of pregnancyen
dc.subjectCrown-rump lengthen
dc.subjectOrgan volumeen
dc.subjectThree-dimensional imagingen
dc.titleEvaluation of Placental Volume at 7-10+6 Weeks of Pregnancy by 3D-Sonographyen
dc.typeinfo:eu-repo/semantics/article
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