Navegando por Palavras-chave "Fetal lung volume"

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    Fetal lung volume in fetuses with urinary tract malformations: Comparison by 2D-, 3D-sonography and magnetic resonance imaging
    (Taylor & Francis Ltd, 2010-01-01) Araujo Junior, Edward [UNIFESP]; De Oliveira, Patricia Soares [UNIFESP]; Machado Nardozza, Luciano Marcondes [UNIFESP]; Simioni, Christiane [UNIFESP]; Rolo, Liliam Cristine [UNIFESP]; Goldman, Susan Menasce [UNIFESP]; Szejnfeld, Jacob [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Objective. To evaluate the concordance between two-dimensional ultrasonography (2DUS), three-dimensional ultrasonography (3DUS) and magnetic resonance imaging (MRI) in the assessment of lung volume in fetuses with urinary tract malformations (UTM).Methods. This was a cross-sectional study involving 12 pregnancies between 19 and 34 weeks, with various fetal UTM. Pulmonary volume was obtained by 2DUS using the following equation: total lung volume = [right lung antero-posterior diameter (X) x transverse diameter (Y) x cranial-caudal diameter x 0.152 + left lung (X1) x (Y1) x (Z1) x 0. 167]. Pulmonary volume by 3DUS was obtained using the virtual organ computer-aided analysis (VOCAL) method with a 30 degrees (VOL30), 18 degrees (VOL18) and 12 degrees (VOL12) rotation. A fast sequence of transverse lung section was also obtained by MRI. the intraclass correlation coefficient was used to evaluate the correlation between the three methods. the paired student t-test was used to compare the means.Results. There was a strong correlation between the three methods, and the highest correlations were between MRI and VOL18 for the right (ICC = 0.913) and left (ICC = 0.947) lungs. A strong correlation was also found between the lung volumes obtained through MRI and VOL12 as well as VOL18 (p = 0.544 and 0.286, respectively). However, for the left lung there was only a correlation between MRI and VOL12 (p = 0.49).Conclusions. There is a good concordance between 3DUS (VOL12) and MRI in the evaluation of lung volume in fetuses with UTM.
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    Fetal lung volume: comparison by 2D-and 3D-sonography in normal fetuses
    (Springer, 2009-09-01) Werneck Britto, Ingrid Schwach; Silva Bussamra, Luiz Claudio de; Araujo Junior, Edward [UNIFESP]; Tedesco, Giselle Darahem; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Aoki, Tsutomu; Universidade Federal de São Paulo (UNIFESP); Med Sci Coll Santa Casa São Paulo
    To compare two-dimensional ultrasonography (2D US) and three-dimensional ultrasonography (3D US) in the assessment of normal fetal lung volume.A cross-sectional study was performed involving 50 normal pregnancies at 24-32 weeks' gestation. the following equations were used for lung volume calculation by 2D US: Eq(2D1) = 4.24 + {1.53 x [(area of base of both lungs) x 1/3 (height of right lung)]} and Eq(2D2) = [anteroposterior diameter (X) x transverse diameter (Y) x cranial-caudal diameter (Z) of the right lung x 0.152 + (X') x (Y') x (Z') of the left lung x 0.167]. for 3D US, the virtual organ computer-aided analysis (VOCAL) method was used with a 30A degrees rotation angle and the total lung volume (V3D) was obtained by summing the volumes of each lung. Regression models (R (2)) were devised to assess lung volume evolution over the course of the pregnancy. Pearson's correlation coefficient (r) was used to assess correlation among the techniques, while Friedman's test was used for means comparisons.Strong correlation was observed among the three techniques [V3D vs. Eq(2D2) r = 0.856; V3D vs. Eq(2D1) r = 0.838 and Eq(2D2) vs. Eq(2D1) r = 0.964; all with P < 0.001]. Mean lung volumes were 37.05 +/- A 9.67, 29.79 +/- A 8.79 and 12.67 +/- A 4.12 ml for V3D, Eq(2D1) and Eq(2D2), respectively (P < 0.001).Strong correlation and significant difference was observed among the three techniques of fetal lung volume assessment in normal fetuses.
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    Reference range of fetal lung volume by 3D-ultrasonography using the rotational method (VOCAL)
    (Walter de Gruyter & Co, 2009-03-01) Werneck Britto, Ingrid Schwach; Silva Bussamra, Luiz Claudio de; Junior, Edward Araujo [UNIFESP]; Tedesco, Giselle Daharem; Machado Nardozza, Luciano Marcondes [UNIFESP]; Moron, Antonio Fernandes [UNIFESP]; Aoki, Tsutomu; Med Sci Coll Santa Casa São Paulo FCMSCSP; Universidade Federal de São Paulo (UNIFESP)
    Aim: To determine reference ranges for fetal lung volume by 3-dimensional ultrasonography using the VOCAL (Virtual Organ Computed-aided Analysis) method.Methods: A longitudinal prospective study was conducted with 61 uncomplicated pregnancies between 24 and 32 weeks of gestation. A separate measurement of both lungs volume was conducted by VOCAL with 308 rotation angle. for each gestational age, an average, standard deviation and maximal and minimal values were established in addition to the percentiles 5, 10, 25, 50, 75 and 90 for right and left lung volume. To evaluate the correlation between lung volume and gestational age, and estimated fetal weight, a polynomial regression with determination coefficient adjustment (R(2)) was used. the intra-observer reproducibility was evaluated by the intra-class correlation coefficient (ICC), whereas the inter-observer reproducibility was evaluated by Cronbach alpha statistic test.Results: the average right lung volume varied from 12.5 +/- 0.7 cm(3) at the 24(th) week to 31.8 cm(3)+/- 1.8 cm(3) at the 32(nd) week. the average left lung volume varied from 9.2 +/- 0.9 cm(3) at the 24(th) week to 22.0 cm(3)+/- 1.6 cm(3) at the 32(nd) week. We observed a strong correlation between right lung volume and gestational age (R(2)=0.975) and estimated fetal weight (R(2)=0.905), as well as between the left lung volume with gestational age (R(2)=0.970) and estimated fetal weight (R(2)=0.908). We observed a good intra-observer reproducibility for the right lung volume (ICC=0.990) and for the left lung volume (ICC=0.986). Similarly, we observed good inter-observer reproducibility for right lung volume (0.975) and left lung volume (0.962).Conclusion: Reference range of fetal lung volume by 3D-ultrasonography using the VOCAL method was determined.