<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0300-9041</journal-id>
<journal-title><![CDATA[Ginecología y obstetricia de México]]></journal-title>
<abbrev-journal-title><![CDATA[Ginecol. obstet. Méx.]]></abbrev-journal-title>
<issn>0300-9041</issn>
<publisher>
<publisher-name><![CDATA[Federación Mexicana de Colegios de Obstetricia y Ginecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0300-90412024000500199</article-id>
<article-id pub-id-type="doi">10.24245/gom.v92i5.2927</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Valores de referencia del Doppler fetal en el Instituto Nacional de Parinatología Isidro Espinosa de los Reyes]]></article-title>
<article-title xml:lang="en"><![CDATA[Reference values of fetal Doppler at the Instituto Nacional de Perinatología Isidro Espinosa de los Reyes.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Narváez Chávez]]></surname>
<given-names><![CDATA[John]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acevedo Gallegos]]></surname>
<given-names><![CDATA[Sandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallardo Gaona]]></surname>
<given-names><![CDATA[Juan Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez Torres]]></surname>
<given-names><![CDATA[Berenice]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Perinatología Isidro Espinoza de los Reyes  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Perinatología Isidro Espinoza de los Reyes Departamento de Medicina Materno Fetal ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Perinatología Isidro Espinoza de los Reyes Departamento de Medicina Materno Fetal ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>92</volume>
<numero>5</numero>
<fpage>199</fpage>
<lpage>214</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412024000500199&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412024000500199&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412024000500199&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO: Establecer los valores de referencia del índice de pulsatilidad con Doppler pulsado en la valoración materna y fetal de los embarazos en seguimiento entre las 18 y 39 semanas de gestación.  MATERIALES Y MÉTODOS:  Estudio descriptivo y transversal, efectuado en pacientes con embarazo único, entre las 18 a 40 semanas, que acudieron al Departamento de Medicina Materno Fetal del Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, entre los meses de septiembre de 2017 a mayo de 2018. La evaluación Doppler se practicó con medición del índice de pulsatilidad de las arterias uterinas, umbilical, cerebral media y conducto venoso en cada semana del embarazo. Se crearon tablas de referencia para cada semana de la gestación y se establecieron los percentiles 3, 5, 10, 90 y 95.  RESULTADOS: Se registraron 862 pacientes. Los valores del índice de pulsatilidad de la arteria umbilical reportaron 17% en semanas tempranas de la gestación y 21% en edades gestacionales mayores. Los valores de la arteria umbilical fueron 3% menores en edades gestacionales tempranas y 10% menores al término del embarazo; 20% para la arteria umbilical, 15% para el conducto venoso y 10% para la arteria cerebral media. Los valores del índice de pulsatilidad medio de las arterias uterinas fueron mayores un 3% en edades gestacionales tempranas y 28% menores al término del embarazo.  CONCLUSIONES: Los hallazgos de este estudio sugieren diferencias significativas con las poblaciones de Europa y Norteamérica; incluso difieren de los valores de referencia utilizados en la actualidad en la población mexicana, lo que supone una subestimación de las condiciones fetales o maternas al hacer las evaluaciones de la unidad fetoplacentaria.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE: Establish the reference values for the pulsatility index using pulsed Doppler in the maternal and fetal assessment of pregnancies followed at 18 and 39 weeks of gestation.  MATERIALS AND METHODS:  Descriptive and cross-sectional study, carried out in patients with a singleton pregnancy, between 18 and 40 weeks, who attended the Department of Maternal Fetal Medicine of the National Institute of Perinatology, from September 2017 to May 2018. The Doppler evaluation was performed, with measurement of the pulsatility index of the uterine, umbilical, middle cerebral arteries, and venous duct in each week of pregnancy. Reference tables were created for each gestational age, establishing percentiles 3, 5, 10, 90 and 95.  RESULTS: A total of 862 patients were registered. The umbilical artery pulsatility index values were reported to be 17% at early gestational ages and 21% at older gestational ages; Umbilical artery values were 3% lower at early gestational ages and 10% lower at term of pregnancy; 20% for the umbilical artery, 15% for the ductus venosus and 10% for the middle cerebral artery. The values of the mean pulsatility index of the uterine arteries were 3% higher at early gestational ages and 28% lower at the end of pregnancy.  CONCLUSIONS: The findings of this study suggest significant differences with the populations of Europe and North America; They even differ from the reference values currently used in the Mexican population, which represents an underestimation of fetal and/or maternal conditions when carrying out evaluations of the feto-placental unit.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Embarazo]]></kwd>
<kwd lng="es"><![CDATA[arteria uterina]]></kwd>
<kwd lng="es"><![CDATA[arteria umbilical]]></kwd>
<kwd lng="es"><![CDATA[arteria cerebral media]]></kwd>
<kwd lng="es"><![CDATA[conducto venoso]]></kwd>
<kwd lng="es"><![CDATA[índice de pulsatilidad]]></kwd>
<kwd lng="es"><![CDATA[Doppler]]></kwd>
<kwd lng="es"><![CDATA[valores de referencia]]></kwd>
<kwd lng="en"><![CDATA[Pregnancy]]></kwd>
<kwd lng="en"><![CDATA[Uterine artery]]></kwd>
<kwd lng="en"><![CDATA[Umbilical artery]]></kwd>
<kwd lng="en"><![CDATA[middle cerebral artery]]></kwd>
<kwd lng="en"><![CDATA[Venous duct]]></kwd>
<kwd lng="en"><![CDATA[Pulsatility index]]></kwd>
<kwd lng="en"><![CDATA[Doppler]]></kwd>
<kwd lng="en"><![CDATA[Reference values]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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