{"id":24198,"date":"2003-01-07T00:00:00","date_gmt":"2003-01-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-de-la-funcion-hipotalamo-hipofisario-tiroidea-en-117-recien-nacidos-pretermino-de-menos-de-treinta-semanas-de-edad-gestacional\/"},"modified":"2003-01-07T00:00:00","modified_gmt":"2003-01-07T00:00:00","slug":"estudio-de-la-funcion-hipotalamo-hipofisario-tiroidea-en-117-recien-nacidos-pretermino-de-menos-de-treinta-semanas-de-edad-gestacional","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estudio-de-la-funcion-hipotalamo-hipofisario-tiroidea-en-117-recien-nacidos-pretermino-de-menos-de-treinta-semanas-de-edad-gestacional\/","title":{"rendered":"Estudio de la funci\u00f3n hipot\u00e1lamo-hipofisario-tiroidea en 117 reci\u00e9n nacidos pret\u00e9rmino de menos de treinta semanas de edad gestacional"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mar\u00eda Clemente Le\u00f3n <\/strong><\/h2>\n<p>Estudio de la funci\u00f3n tiroidea en 117 reci\u00e9n nacidos pret\u00e9rmino (rnpt) de 24 a 29 semanas de edad gestacional, mediante la determinaci\u00f3n de los valores de tsh, t4 libre (t4l), t3, t4 (inmunoquemiluminiscencia) y rt3 (radioinmunoensayo) en diferentes tiempos, desde el nacimiento hasta los 2 a\u00f1os de vida. La distribuci\u00f3n por edades gestacionales fue: 10 de 24 semanas, 11 de 25 semanas, 16 de 26 semanas, 24 de 27 semanas, 28 de 28 semanas y 28 de 29 semanas. Se utiliz\u00f3 como control un grupo de 75 rnpt sanos de 30 a 35 semanas de gestaci\u00f3n. Se clasificaron como hipotiroxin\u00e9micos aquellos arnpt con valores de t4l inferiores a menos dos desviaciones est\u00e1ndar de la media del grupo control en cada tiempo.  observamos que tras el nacimiento se producen cambios en los valores de hormonas tiroideas, con un patr\u00f3n similar de evoluci\u00f3n en todas las edades gestacionales (pico de secreci\u00f3n de tsh seguido de pico de t4l, t3 y t4 a las 24 horas de vida, disminuci\u00f3n posterior de todos los valores de hormonas tiroideas con valores m\u00ednimos de t4l a la semana y recuperaci\u00f3n progresiva a partir de entonces). Los valores de t4l fueron inferiores en los rnpt de menor edad gestacional, por ello dividimos a los rnpt en dos grupos de edad gestacional (27 a 29 semanas y grandes inmaduros de 24 a 26 semanas). se comprueba que los rnpt m\u00e1s maduros (27-29 semanas) presenta valores significativamente superiores de t4l durante las primeras tres semanas de vida.  los rnpt de 24-26 semanas y los rnpt de 27-29 semanas presentaron valores de t4l inferiores al grupo control durante los primeros dos meses de vida, posteriormente los valores de t4l fueron similares. Sin embargo en todos los tiempos evaluados se observaron rnpt con valores de t4l por encima de la media del grupo control, incluso dentro del grupo de los rnpt de 24-26 semanas. Por tanto existen rnpt de una misma edad gestacional y postnatal con diferente biodisponibilidad perif\u00e9rica de hormonas<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estudio de la funci\u00f3n hipot\u00e1lamo-hipofisario-tiroidea en 117 reci\u00e9n nacidos pret\u00e9rmino de menos de treinta semanas de edad gestacional<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estudio de la funci\u00f3n hipot\u00e1lamo-hipofisario-tiroidea en 117 reci\u00e9n nacidos pret\u00e9rmino de menos de treinta semanas de edad gestacional <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mar\u00eda Clemente Le\u00f3n <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/07\/2003<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Antonio Carrascosa Lezcano<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: angel Bllabriga aguado <\/li>\n<li>Francisco Rodr\u00edguez hierro (vocal)<\/li>\n<li>Rafael Jimenez gonzalez (vocal)<\/li>\n<li>diego Yeste fern\u00e1ndez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mar\u00eda Clemente Le\u00f3n Estudio de la funci\u00f3n tiroidea en 117 reci\u00e9n nacidos pret\u00e9rmino (rnpt) de 24 a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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