Navegando por Palavras-chave "First trimester of pregnancy"
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- ItemSomente MetadadadosAssessment of the Fetal Heart at 12-14 Weeks of Pregnancy Using B-Mode, Color Doppler, and Spatiotemporal Image Correlation via Abdominal and Vaginal Ultrasonography(Springer, 2013-10-01) Felipe Lima, Angelia Iara [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Martins, Wellington P.; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Silva Pares, David Baptista [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Universidade de São Paulo (USP); Ultrasonog & Retraining Med Sch Ribeirao Preto EUThis study aimed to evaluate the effect that combining multiple ultrasonographic imaging methods has on the proportion of tests with a satisfactory fetal heart assessment at 12-14 weeks of pregnancy using B-mode, color Doppler, and spatiotemporal image correlation software (STIC) via both the abdominal and vaginal routes. This cross-sectional prospective study involved healthy pregnant women at 12-14 weeks of pregnancy with a crown-rump length (CRL) of 84 mm or shorter. the following four cardiac views were assessed: four-chamber, left and right ventricular outflow tract, and aortic arch views. the same examiner sought to identify these four views using B-mode, color Doppler, and STIC via both the vaginal and abdominal routes. the study determined the proportion of cases and the respective 95 % confidence intervals (CIs) in which all four views were identified. the presence of significant differences in comparisons between methods was analyzed using McNemar's test. Although 57 pregnant women at 12-14 weeks of pregnancy agreed to participate in the study, 4 were not included because they presented with a CRL longer than 84 mm. Thus, 53 pregnant women were thoroughly assessed and included in the analysis. the combination of B-mode, color Doppler, and STIC via both the abdominal and vaginal routes enabled the highest proportion of identification of the four views (90.6 %; 95 % CI, 79.8-95.9 %). the lowest proportions were observed when B-mode was used alone via both the vaginal route (30.2 %; 95 % CI, 19.5-43.5 %) and the abdominal route (37.7 %; 95 % CI, 25.9-51.2 %). the abdominal route showed results slightly better than those of the vaginal route with all the methods, but the differences were not statistically significant. in the vast majority of the cases, the fetal hearts were properly assessed at 12-14 weeks of pregnancy when several methods were combined using both the abdominal and vaginal routes. However, only one-third of them would have had adequate heart assessment if the B-mode via either the abdominal or the vaginal route had been used alone.
- ItemAcesso aberto (Open Access)Avaliação do volume da placenta no primeiro trimestre de gestação por meio da ultrassonografia tridimensional utilizando o método XI VOCAL(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2010-04-01) Nowak, Paulo Martin [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Guimarães Filho, Hélio Antonio [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)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.
- ItemAcesso aberto (Open Access)Correlação do volume da vesícula vitelínica obtida por meio da ultrassonografia tridimensional com a idade gestacional entre a 7ª e a 10ª semanas usando o método multiplanar(Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2009-12-01) Rolo, Liliam Cristine [UNIFESP]; Nardozza, Luciano Marcondes Machado [UNIFESP]; Araujo Júnior, Edward [UNIFESP]; Bortoletti Filho, João [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: To evaluate the correlation between the yolk sac volume measured by three-dimensional ultrasonography with gestational age at 7-10 weeks. MATERIALS AND METHODS: A cross-sectional study involving 72 healthy pregnant women at 7th-10th gestational weeks. The multiplanar method with 1.0 mm intervals was utilized. Regression models were constructed to analyze the correlation between yolk sac volume and gestational age, adjusted by the determination coefficient (R²). Mean, median, standard deviation, maximum and minimum values for yolk sac volume were calculated for each gestational age. RESULTS: A poor correlation was observed between yolk sac volume (YSV) and gestational age (GA). The quadratic regression was the model that best expressed this correlation: YSV = 0.9757 - 0.2499 × GA + 0.0172 × GA² (R² = 0.234). Mean yolk sac volume ranged from 0.07 cm³ (0.02-0.11) to 0.20 cm³ (0.02-0.74) between the 7th and 10th weeks (mean, 0.11 cm³, ± 0.10 cm³). CONCLUSION: There was a poor correlation between yolk sac volume and gestational age.
- ItemSomente MetadadadosEvaluation of Placental Volume at 7-10+6 Weeks of Pregnancy by 3D-Sonography(W B Saunders Co Ltd, 2009-07-01) Nardozza, L. M. M. [UNIFESP]; Nowak, P. M. [UNIFESP]; Araujo Junior, E. [UNIFESP]; Guimaraes Filho, H. A. [UNIFESP]; Rolo, L. C. [UNIFESP]; Torloni, M. R. [UNIFESP]; Moron, A. F. [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)The 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.
- ItemSomente MetadadadosNomogram of amniotic fluid volume at 7 to 10+6 weeks of pregnancy by three-dimensional ultrasonography using the rotational method (VOCAL)(Springer, 2010-02-01) Rolo, Liliam Cristine [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Araujo Junior, Edward [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)To establish normative data for amniotic fluid volume (AFV) between 7 and 10 + 6 weeks gestation using three-dimensional ultrasonography (3DUS).A cross-sectional study involving 74 normal pregnancies was performed to assess AFV. All measurements were performed using an endocavitary volumetric transducer. the VOCAL (virtual organ computer-aided analysis) method was used for volumetric calculations, with a 30A degrees rotation angle. the AFV was obtained subtracting the embryonic volume from the amniotic sac volume. To analyze the correlation between AFV and gestational age, regression models were constructed and adjustments were made using the determination coefficient (R (2)). the following AFV values were obtained for each week: mean, median, standard deviation, minimum and maximum. the method proposed by Royston and Wright was used to calculate the reference intervals according to crown-rump length (CRL).Mean AFV increased from 3.97 cm(3) (range 1.17-10.97 cm(3)) at 7 to 7 + 6 weeks to 23.33 cm(3) (ranging from 11.93 to 32.41 cm(3)) at 10 to 10 + 6 weeks of pregnancy. There was a significant correlation between AFV and gestational age (R (2) = 0.635) and between AFV and CRL (R (2) = 0.756). Mean AFV increased from 7.81 cm(3) (ranging from 0.18 to 15.43 cm(3)) to 50.28 cm(3) (range 16.49-84.07 cm(3)) for CRL between 12 and 40 mm.Reference limits for AFV using 3DUS were generated for pregnancies between 7 and 10 + 6 weeks according to CRL.
- ItemSomente MetadadadosReference Range of Embryo Volume by 3-D Sonography Using the XI VOCAL Method at 7 to 10+6 Weeks of Pregnancy(Thieme Medical Publ Inc, 2010-06-01) Araujo Junior, Edward [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Nowak, Paulo Martin [UNIFESP]; Bortoletti Filho, Joao [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)We sought to establish normative data for three-dimensional ultrasound (3DUS) first-trimester embryonic volume using the extended imaging virtual organ computer-aided analysis (XI VOCAL) technique. This cross-sectional study involved 64 normal pregnancies at 7 to 10 + 6 weeks' gestation. Embryonic volume was obtained on 3DUS using the XI VOCAL technique with manual outline of 10 sequential planes. the mean, median, standard deviation, and maximum and minimum values were obtained for each week calculated. Polynomial regression models adjusted by the determination coefficient (R(2)) were created to assess the correlation between embryonic volume and gestational age (GA) and crown rump length (CRL). the intraclass correlation coefficient (ICC) was used to calculate inter-and intraobserver reproducibility. Mean embryonic volume went from 0.20 cm(3) (range 0.10 to 0.89 cm(3)) to 5.12 cm(3) (range 2.90 to 5.98 cm(3)). Embryonic volume was strongly correlated with GA (R(2) = 0.84) and with CRL (R(2) = 0.87). There was a good inter-and intraobserver reproducibility of embryonic volume with ICC = 0.999 and 0.995, respectively. Reference range for 3DUS first-trimester embryonic volume using the XI VOCAL technique were generated for pregnancies at 7 to 10 + 6 weeks, with high inter-and intraobserver reproducibility.