<?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>2444-054X</journal-id>
<journal-title><![CDATA[Cirugía y cirujanos]]></journal-title>
<abbrev-journal-title><![CDATA[Cir. cir.]]></abbrev-journal-title>
<issn>2444-054X</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Cirugía A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2444-054X2025000100011</article-id>
<article-id pub-id-type="doi">10.24875/ciru.23000090</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Volume status evaluation by IVC diameter and pleth variability index in spinal anesthesia]]></article-title>
<article-title xml:lang="es"><![CDATA[Evaluación del volumen mediante la IVC y el índice de variabilidad de pleth en anestesia espinal]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Durmu&#351;]]></surname>
<given-names><![CDATA[Irem]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Göksu]]></surname>
<given-names><![CDATA[&#350;enay]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Akyol]]></surname>
<given-names><![CDATA[Ahmet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Akdemir]]></surname>
<given-names><![CDATA[Mehmet S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ümraniye Training and Research Hospital Health Sciences University Department of Anesthesia and Reanimation]]></institution>
<addr-line><![CDATA[Istanbul ]]></addr-line>
<country>Turkey</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2025</year>
</pub-date>
<volume>93</volume>
<numero>1</numero>
<fpage>68</fpage>
<lpage>75</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2444-054X2025000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2444-054X2025000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2444-054X2025000100011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: We aimed to predict the risk of hypotension due to spinal anesthesia (HSA) by measuring the diameter and area of the inferior vena cava (IVC-D, IVC-A) through ultrasound and pleth variability index (PVI) in patients who underwent endovenous radiofrequency ablation under spinal anesthesia (SA).  Method: This cross-sectional, observational, and prospective study was completed with 64 patients. Before SA, PVI IVC-D, and IVC-A were measured. Patients were divided into two groups as hypotension group (Group 1) and patients who did not developed hypotension after SA (Group 2). Shapiro–Wilk normality test and student’s t-test were used for statistical analysis.  Results: The mean PVI of Group 1 was higher than Group 2, whereas the mean IVC-D and IVC-A in Group 2 was significantly higher than Group 1 (p = 0.000, p = 0.000, p = 0.001). Cutoff values for hypotension PVI &gt; 15% and IVC-A &#8804; 2.98 mm2 (p = 0.001, p &lt; 0.05).  Conclusion: PVI and IVC-D and IVC-A measurements are effective and reliable methods that should be used to predict the risk of developing HSA in patients who will undergo surgery under SA.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: El objetivo de nuestro estudio fue predecir el riesgo de hipotensión debido a la anestesia espinal (HSA) midiendo el diámetro y el área de la vena cava inferior (IVC-D, IVC-A) mediante ecografía y el índice de variabilidad de pleth (PVI) en pacientes sometidos a ablación por radiofrecuencia endovenosa bajo anestesia espinal.  Método: Este estudio transversal, observacional y prospectivo se completó con 64 pacientes. Antes de la anestesia espinal (SA) se midieron los diámetros y áreas del PVI y la IVC. Los pacientes se dividieron en dos grupos: grupo de hipotensión (grupo 1) y pacientes que no desarrollaron hipotensión después de la SA (grupo 2). Se utilizó la prueba de normalidad de Shapiro-Wilk y la prueba t de Student para el análisis estadístico.  Resultados: Este estudio transversal, observacional y prospectivo se completó con 64 pacientes. El PVI medio del grupo1 fue mayor que el grupo 2, que el IVC-D y IVC-A en el grupo 2 fueron mayores que en el grupo 1 (p = 0.000, p = 0.000, p = 0,001). Los valores de corte para la hipotensión fueron PVI &gt; 15% y área de la VCI &#8804; 2.98 mm2 (p = 0,00; p &lt; 0.05).  Conclusión: Las mediciones del PVI, IVC-D y IVC-A son métodos efectivos y confiables que deben utilizarse para predecir el riesgo de HSA en pacientes que se someterán a cirugía bajo SA.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Spinal anesthesia]]></kwd>
<kwd lng="en"><![CDATA[Hypotension]]></kwd>
<kwd lng="en"><![CDATA[Pleth variability &#305;ndex]]></kwd>
<kwd lng="en"><![CDATA[Inferior vena cava]]></kwd>
<kwd lng="es"><![CDATA[Anestesia espinal]]></kwd>
<kwd lng="es"><![CDATA[Hipotensión]]></kwd>
<kwd lng="es"><![CDATA[Índice de variabilidad de pleth]]></kwd>
<kwd lng="es"><![CDATA[Vena cava inferior]]></kwd>
</kwd-group>
</article-meta>
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