Search results for " Fetal"
showing 10 items of 119 documents
Educazione ambientale per la prevenzione delle patologie fetali e neonatali
2018
Valoración de los parámetros normales de ecocardiografía fetal en 2D y 3D a lo largo de la gestación
2015
La evaluación cardiaca fetal mediante ecografía forma parte de nuestra práctica clínica diaria. Por tanto, es muy importante disponer de valores de referencia para todos los parámetros cardiacos ajustados a nuestra población. Una forma de describir una medida de un parámetro cardiaco es mediante los Z score, que expresan cuántas desviaciones estándar está una observación por encima o debajo de la media esperada. Los Z score permiten normalizar el tamaño de las estructuras cardiacas respecto a algún parámetro de la biometría fetal, en vez de con la edad gestacional. Los Z-score son útiles para determinar si una estructura cardiaca mantiene su crecimiento respecto al crecimiento somático glob…
Valoración de los niveles materno-fetales de 25-OH Vitamina D y grado de mineralización ósea del recién nacido
2018
Introducción: La Vitamina D (VD) se obtiene mayoritariamente de la síntesis endógena cutánea tras exposición solar y, en menor medida, del aporte dietético. Su función fundamental es asegurar unos niveles séricos adecuados de calcio y fósforo que permitan una adecuada mineralización ósea. Su déficit durante la edad pediátrica causa raquitismo y podría afectar a la adquisición del pico de masa ósea durante la pubertad, lo que ha motivado diversas recomendaciones para su suplementación. Pero hasta la fecha se desconoce qué efecto pueden tener los niveles bajos de 25(OH)VD o calcidiol de las embarazadas sobre la mineralización del esqueleto fetal. Objetivo Principal: Conocer si existe relación…
Significance of enlarged fetal bladder in males. The value of amniotic fluid. When to perform vesicostomy?.
2009
Astrocitos y zinc: alteraciones inducidas en modelos in vitro de los síndromes alcohólico fetal y de Down
2015
El zinc es un elemento traza esencial; crítico para un gran número de proteínas estructurales, procesos enzimáticos y factores de transcripción. Esta variada ubicación en las biomoléculas hace que participe en multitud de funciones celulares y tisulares. En el caso particular del cerebro, los iones zinc están implicados, además, en la transmisión sináptica. Por todo ello, la homeostasis del zinc es crucial para la función y supervivencia de las células, y estas han desarrollado una amplia variedad de sistemas para el control de la concentración de zinc en las células. La deficiencia de zinc puede acabar desencadenando muchos problemas fisiológicos y de salud, que afectan a la mayoría de los…
Association of first trimester fetal heart rate and nuchal translucency with preterm birth.
2021
To evaluate whether first trimester fetal heart rate (FHR) and nuchal translucency (NT) associate with preterm birth (PTB).This was a comparative case-control study of 518 normal pregnancies with no history of PTB, of which 272 delivered at term (TB) and 246 progressed to spontaneous PTB prior to 37, 34, 32, and 28 weeks. Fetal heart rate (FHR) and NT values at the first-trimester scan were compared by means of univariable (Mann-Whitney) and multivariable logistic regression analysis considering hourglass membranes (HM) as the most severe PTB subgroup. Finally, severity trends for both parameters were investigated using correlations with gestational age (GA) at delivery and Kruskal-Walls te…
IVIG in APS pregnancy
2004
For more than two decades, the intravenous administration of high doses of IgG pooled from the plasma of healthy donors (immune globulin therapy, also known as ‘IVIG’) has benefited patients with a variety of autoimmune disorders. A potential therapeutic role of IVIG in the prevention of thrombosis and of miscarriages in antiphospholipid syndrome (APS) has been postulated. Multicenter randomized controlled trials attempted to define the role of IVIG in preventing pregnancy complications in APS indicate that simple anticoagulation could not be completely satisfactory, and certain patient subgroups might take advantage of IVIG therapy alone or in combination with heparin.
Dithiothreitol prevents age-associated decrease in oocyte/conceptus viability in vitro.
1998
The present study was designed to ascertain whether the negative effects on reproductive potential of post-ovulatory ageing in vitro of oocytes can be prevented by antioxidant therapy. Mouse metaphase II (MII) oocytes were aged in vitro for 12 h prior to insemination in the presence of varying concentrations of L-ascorbic acid, 6-methoxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (Trolox), L-cystine dihydrochloride, ethylenediaminetetraacetic acid (EDTA), beta-mercaptoethanol and DL-dithiothreitol (DTT). In-vitro ageing of oocytes was associated with lower fertilization rate, higher proportion of concepti exhibiting cellular fragmentation at 24 h post-insemination and lower percentage of…
Computerized analysis of normal fetal heart rate pattern throughout gestation.
2009
Objective To analyze the evolution of computerized cardiotocography (cCTG) parameters throughout gestation in a large archive of traces from healthy fetuses. Methods This was a cross-sectional study of the first cCTG record from 4412 singleton fetuses with good pregnancy outcome. Normal ranges of cCTG parameters for 25 to 42 weeks were derived from analysis of only one cCTG record per fetus, and the relationship between the parameters and gestational age was investigated. Results Fetal heart rate (FHR) accelerations, short- and long-term variation overall, duration of episodes of high and low variation and variation in high episodes increased with advancing gestation. In contrast, maternal …
Role of prenatal magnetic resonance imaging in fetuses with isolated severe ventriculomegaly at neurosonography: A multicenter study.
2021
Objective: The aim of this study was to report the rate of additional anomalies detected exclusively at prenatal magnetic resonance imaging (MRI) in fetuses with isolated severe ventriculomegaly undergoing neurosonography. Method: Multicenter, retrospective, cohort study involving 20 referral fetal medicine centers in Italy, United Kingdom, Spain and Denmark. Inclusion criteria were fetuses affected by isolated severe ventriculomegaly (≥15 mm), defined as ventriculomegaly with normal karyotype and no other additional central nervous system (CNS) and extra-CNS anomalies on ultrasound. In all cases, a multiplanar assessment of fetal brain as suggested by ISUOG guidelines on fetal neurosonogra…