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   <subfield code="a">10.1007/s00404-010-1492-3</subfield>
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   <subfield code="a">(NATIONALLICENCE)springer-10.1007/s00404-010-1492-3</subfield>
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   <subfield code="a">Evaluation of ductus venosus and inferior vena cava by using multiple Doppler ultrasound parameters in healthy fetuses</subfield>
   <subfield code="h">[Elektronische Daten]</subfield>
   <subfield code="c">[Francisco Gallarreta, Wellington Martins, Carolina Nastri, Francisco Mauad Filho, Luis Nicolau, Daniela Barra, Edson Morais, Gerson Crott]</subfield>
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   <subfield code="a">Purpose: The objective of this study was to describe multiple Doppler ultrasound parameters of ductus venosus and inferior vena cava in fetuses at gestational ages ranging from 22 to 38weeks. Study design: In this prospective observational study, Doppler ultrasound exams were performed in 45 healthy fetuses at 22, 26, 34, and 38weeks. Maximum venous velocity, minimum venous velocity, venous pulsatility index, and venous acceleration time (VAT) (defined as the time between minimum and maximum venous velocity) were evaluated at those gestational periods. Results: Increase in the velocities and decrease in the pulsatility index were observed in these vessels throughout gestational age. The VAT increased with gestational age. Conclusions: The VAT, a Doppler parameter still not described elsewhere, increased during pregnancy could be related to a longer period of time needed to fill the atrium in bigger hearts. In this study, we provide reference values for VAT in healthy fetuses.</subfield>
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   <subfield code="a">Springer-Verlag, 2010</subfield>
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   <subfield code="a">Doppler effect</subfield>
   <subfield code="2">nationallicence</subfield>
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   <subfield code="a">Inferior vena cava</subfield>
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   <subfield code="a">Ductus venosus</subfield>
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   <subfield code="a">Ultrasonography</subfield>
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   <subfield code="a">Gallarreta</subfield>
   <subfield code="D">Francisco</subfield>
   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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   <subfield code="a">Martins</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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   <subfield code="a">Nastri</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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   <subfield code="a">Mauad Filho</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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   <subfield code="a">Morais</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia da, Universidade Federal de Santa Maria, Santa Maria, Rio Grande do Sul, Brazil</subfield>
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   <subfield code="a">Crott</subfield>
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   <subfield code="u">Departamento de Ginecologia e Obstetrícia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Av. Bandeirantes, 3900, 8º andar, HCRP, Campus Universitário, 14049-900, Ribeirão Preto, São Paulo, Brazil</subfield>
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  <datafield tag="773" ind1="0" ind2=" ">
   <subfield code="t">Archives of Gynecology and Obstetrics</subfield>
   <subfield code="d">Springer-Verlag</subfield>
   <subfield code="g">283/5(2011-05-01), 959-963</subfield>
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