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Quantitative analysis of placental vasculature by three-dimensional power doppler ultrasonography in normal pregnancies from 12 to 40 weeks of gestation
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Orientador(es)
Resumo(s)
Evaluate the distribution and variation of placental vascular indices according to gestational age and
placental volume. From March to November 2007, three-dimensional (3D)-power Doppler ultrasound
was performed in 295 normal pregnancies from 12 to 40 weeks of gestation. Using the same preestablished
settings for all patients, power Doppler was applied to the placenta and placental volume
was obtained by the rotational technique (VOCAL ). The 3D-power histogramwas used to determine the
placental vascular indices: vascularization index (VI), flow index (FI) and vascularization-flow index
(VFI). The placental vascular indices were then plotted against gestational age and placental volume. All
placental vascular indices showed constant distribution throughout gestation. A tendency for a reduction
in placental vascular indices with increased placental volume was observed, but was only statistically
significant when placental FI was considered (p < 0.05). All placental vascular indices estimated by 3Dpower
Doppler ultrasonography presented constant distribution throughout gestation, despite the
increase in placental volume according to gestational age.
Descrição
Palavras-chave
Placenta Ultrasonography Three-dimensional power Doppler ultrasonography Placental vascularization
Contexto Educativo
Citação
Placenta, 30, 142-148
Editora
Elsevier