التفاصيل البيبلوغرافية
| العنوان: |
Avaliação do volume da placenta no primeiro trimestre de gestação por meio da ultrassonografia tridimensional utilizando o método XI VOCAL. (Portuguese) |
| العنوان البديل: |
Estimation of placental volume by three-dimensional ultrasonography with the XI VOCAL method in the first gestational trimester. (English) |
| المؤلفون: |
Nowak, Paulo Martin, Machado Nardozza, Luciano Marcondes, Júnior, Edward Araujo, Rolo, Liliam Cristine, Guimarães Filho, Hélio Antonio, Moron, Antonio Fernandes |
| المصدر: |
Radiologia Brasileira; mar/apr2010, Vol. 43 Issue 2, p81-84, 4p, 1 Black and White Photograph, 2 Charts, 1 Graph |
| مصطلحات موضوعية: |
PLACENTA, GESTATIONAL age, ULTRASONIC imaging, THREE-dimensional imaging, MEDICAL imaging systems, FIRST trimester of pregnancy, PREGNANT women, MEDIAN (Mathematics), STANDARD deviations, ARITHMETIC mean |
| الملخص (بالإنجليزية): |
OBJECTIVE: To determine reference values for placental volume at 7 to 10 + 6 weeks of gestation by means of three-dimensional ultrasonography with the XI VOCAL (eXtended Imaging Virtual Organ Computer-aided Analysis) method. MATERIALS AND METHODS: A cross-sectional study was developed with 70 pregnant women at 7 to 10 + 6 weeks of gestation. The XI VOCAL method with ten sequential adjacent planes was utilized in the volume calculations. Means, medians, standard deviation, minimum and maximum values for placental volume were calculated. A scatter plot adjusted by the determination coefficient (R²) was constructed to correlate placental volume and gestational age. RESULTS: Mean placental volume ranged from 4.6 cm³ (2.6-8.6 cm³) to 28.9 cm³ (11.4-66.9 cm³). The placental volume (PV) has shown to be highly correlated with the gestational age (GA) and the best fit equation was [PV = exp(0.582 × GA + 0.063); R² = 0.82]. CONCLUSION: Reference values for placental volume in the first gestational trimester were determined with the XI VOCAL method. [ABSTRACT FROM AUTHOR] |
| Abstract (Portuguese): |
OBJETIVO: Determinar valores de referéncia para o volume da placenta entre 7 e 10 semanas e 6 dias de gestação por meio da ultrassonografia tridimensional utilizando o método XI VOCAL (eXtended Imaging Virtual Organ Computer-aided Analysis). MATERIAIS E MÉTODOS: Realizou-se estudo de corte transversal com 70 gestantes normais entre 7 e 10 semanas e 6 dias. Para o cálculo de volume, utilizou-se o método XI VOCAL com delimitação de dez planos adjacentes. Foram determinadas médias, medianas, desvios-padrão, valores máximo e mínimo para o volume da placenta. Para avaliar a correlação do volume da placenta com a idade gestacional, foi criado gráfico de dispersão, sendo o ajuste realizado pelo coeficiente de determinação (R²). RESULTADOS: A média do volume da placenta variou de 4,6 cm³ (2,6-8,6 cm³) a 28,9 cm³ (11,4-66,9 cm³). O volume da placenta (VP) se mostrou altamente correlacionado com a idade gestacional (IG), sendo o melhor ajuste com a regressão exponencial [VP = exp(0,582 × IG + 0,063); R2 = 0,82]. CONCLUSÃO: Valores de referéncia para o volume da placenta no primeiro trimestre de gestação utilizando o método XI VOCAL foram determinados. [ABSTRACT FROM AUTHOR] |
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