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  • Articles: DFG German National Licenses  (6)
Source
  • Articles: DFG German National Licenses  (6)
Material
Years
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science
    Wound repair and regeneration 2 (1994), S. 0 
    ISSN: 1524-475X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Macrophages are believed to play a crucial role in wound healing by synthesizing and secreting numerous cytokines. Some of these cytokines, such as transforming growth factor-β and tumor necrosis factor-α, promote fibrosis and repair. We have shown that macrophages are recruited to sterile fetal wounds and have the potential to regulate repair by synthesizing transforming growth factor-β1, transforming growth factor-β2, and tumor necrosis factor-α. Transforming growth factor-β was present in fetal lamb wounds in higher amounts than in adult sheep wounds. Furthermore, the concentrations and ratios of the transforming growth factor-β isoforms in wounds that healed without scarring were different from those in wounds that scarred; transforming growth factor-β2 was highest in fetal wounds that did not scar and lowest in adult wounds. These data suggest that concentrations of transforming growth factor-β isoforms rather than total transforming growth factor-β concentration may be important in the regulation of fibrosis in prenatal and postnatal wound healing.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1546-170X
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] We hypothesize that the neurologic deficit associated with open spina bifida is not directly caused by the primary defect but rather is due to chronic mechanical and chemical trauma since the unprotected neural tissue is exposed to the intrauterine environment. We report here that exposure of the ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 3 (1988), S. 15-22 
    ISSN: 1437-9813
    Keywords: Congenital diaphragmatic hernia ; Prenatal diagnosis ; Fetal surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Prenatal diagnosis of congenital diaphragmatic hernia (CDH) is accurate; current techniques can detect lethal nonpulmonary anomalies and prevent diagnostic errors. Despite optimal conventional therapy, most fetuses with detectable CDH will die in the neonatal period (80% mortality). Polyhydramnios is both a common prenatal marker for CDH and a predictor of poor clinical outcome (only 11% survival). Surgical intervention before birth may be necessary to improve survival of the fetus with CDH and polyhydraminos.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 17 (1993), S. 342-349 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'étude échographique répétée des foetus ayant la maladie kystique (adénomateuse) congénitale du poumon (MKACP) et la détection prénatale ont contribué à augmenter nos connaissances de l'histoire naturelle de la lésion, ont aidé à préciser les données physiopathologiques qui peuvent influencer l'évolution clinique et déterminer une démarche thérapeutique basée sur le pronostic. Dans cette série de 22 cas, diagnostiqués avant la naissance, le pronostic était basé sur l'effet de masse pulmonaire et les conséquences physiologiques: une masse importante peut en effet être responsable d'une déviation du médiastin, de l'hypoplasie des tissus pulmonaires normaux, d'une hydramnios, et d'une décompensation cardiovasculaire dont le résultat global est une anasarque foetale. Selon les données anatomiques macroscopiques, échographiques et pronostiques, on peut distinguer deux types de MKACP. Les kystes microscopiques (kystes 〈 5 mm, allure solide) sont souvent associés à une anarsaque foetale et un mauvais pronostic. Les lésions macroscopiques (kystes solitaires ou multiples 〉 5 cm) ne sont pas habituellement associés à une anasarque et le pronostic est généralement plus favorable. Dans cette série, quatre lésions larges initialement, ont diminué de taille au cours de la surveillance échographique, suggérant qu'une amélioration spontanée est toujours possible pendant la vie foetale. En raison du mauvais pronostic associé à une anasarque foetale avec mort foetale ou néonatale, on a été amené à pratiquer une résection chirurgicale élargie des lobes pulmonaires dans deux cas. Les foetus avec MKACP mais sans anasarque ont de bonnes chances de survie à condition d'entourer la maternité, la naissance et les premiers jours de l'enfant avec des soins chirurgicaux et de réanimation adaptés.
    Abstract: Resumen La detección prenatal y el estudio sonográfico seriado de fetos con malformación adenomatosa quística congénita (MAQC) actualmente permite definir la historia natural de esta lesión, determinar las características patofisiológicas que afectan el resultado clínico y formular un manejo basado en pronóstico. En una serie de 22 casos diagnosticados en el período prenatal, el pronóstico global dependió de los efectos de las masas pulmonares y la consecuente alteración fisiológica: una gran masa puede producir desviación mediastinal, hipoplasia del tejido pulmonar normal, polihidramnios y compromiso cardiovascular resultante en hidrops fetal. Los dos tipos de MAQC pudieron ser distinguidos por la anatomía macroscópica, los hallazgos ultrasonográficos y el pronóstico. Las lesiones microquísticas (quiste 〈5 mm; apariencia sólida) generalmente están asociadas con hidrops fetal y tienen un pronóstico pobre. Las lesiones macroquísticas (quistes únicos/múltiples 〉5 mm) usualmente no están asociados con hidrops y exhibieron un pronóstico más favorable. Cuatro lesiones inicialmente de gran tamaño desaparecieron subsiguientemente bajo observación con sonografía seriada prenatal, lo cual sugiere que ocasionalmente se presenta mejoría en el curso del desarrollo fetal. El hallazgo de que los fetos con hidrops conllevan un alto riesgo de muerte fetal o neonatal ha llevado a la resección quirúrgica prenatal del lóbulo pulmonar de volumen masivo (lobectomía fetal) en dos casos. Los fetos con MAQC pero libres de hídrops tienen una buena probabilidad de sobrevivir mediante el transporte materno, un parto programado y resucitación y cirugía neonatales inmediatas.
    Notes: Abstract Prenatal detection and serial sonographic study of fetuses with congenital cystic adenomatoid malformation (CCAM) now makes it possible to define the natural history of this lesion, determine the pathophysiologic features that affect clinical outcome, and formulate management based on prognosis. In a series of 22 prenatally diagnosed cases, the overall prognosis depended on the effects of the lung mass and the consequent physiologic derangement: A large mass may cause mediastinal shift, hypoplasia of normal lung tissue, polyhydramnios, and cardiovascular compromise leading to fetal hydrops. Two types of CCAM were distinguished by gross anatomy, ultrasonographic findings, and prognosis. Microcystic lesions (cysts 〈 5 mm; solid appearance) are often associated with fetal hydrops and have a poor prognosis. Macrocystic lesions (single or multiple cysts 〉 5 mm) are not usually associated with hydrops and have a more favorable prognosis. Four initially large lesions partially disappeared on serial prenatal sonography, suggesting that improvement can occasionally occur during fetal life. The finding that fetuses with hydrops are at high risk for fetal or neonatal demise led to fetal surgical resection of the massively enlarged pulmonary lobe (fetal lobectomy) in two cases. Fetuses with CCAM but without hydrops have a good chance for survival with maternal transport, planned delivery, and immediate neonatal resuscitation and surgery.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-198X
    Keywords: Congenital hydronephrosis ; Fetal surgery ; Vesicoamniotic shunts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This report reviews the management of the fetus with congenital hydronephrosis (CH), a challenging diagnostic and therapeutic problem. Experimental models of obstructive uropathy have produced histologic changes similar to those seen in kidneys of human neonates with congenital hydronephrosis. Relief of obstruction in utero in these models has been shown to prevent some of the dysplastic changes caused by obstruction. These studies have formed the theoretical basis for in utero decompression to restore amniotic fluid dynamics to prevent death from pulmonary hypoplasia, and reverse or arrest dysplastic morphogenesis. The development of prognostic criteria has greatly aided in selection of appropriate fetuses for intervention. These criteria include: (1) Na〈100 mEq/l; (2) Cl〈90 mEq/l; (3) osmolarity 〈210 mosmol; (4) sonographic appearance of the fetal kidneys; (5) amniotic fluid status; (6) urine output at fetal bladder catheterization. All fetuses should have ultrasonography to exclude other anomalies, and karyotype analysis to exclude chromosomal abnormality. If amniotic fluid volume is normal, the pregnancy is followed with serial ultrasound examinations. If oligohydramnios develops, a prognostic evaluation is performed, including fetal bladder catheterization. If the fetus has poor residual renal function, on the basis of prognostic criteria, appropriate counseling may be given. If the fetus has good residual renal function, depending on lung maturity, it can be delivered early for corrective surgery. If diagnosed prior to lung maturity in utero, decompression by either vesicoamniotic shunting or open fetal surgery may be attempted in the highly selected case. Very few fetuses with CH will require in utero decompression, but all benefit from early diagnosis allowing preparation for postnatal care. Open fetal surgery should be considered an experimental therapy until efficacy and safety are established in controlled trials.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 9 (1985), S. 250-257 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'embryogenèse de l'atrésie oesophagienne est réétudiée. L'atrésie oesophagienne est souvent associée avec d'autres anomalies et la naissance prématurée. Son traitement varie en fonction de son importance et de la vigueur du nourrisson, de la gravité des autres anomalies et de la distance entre les deux extrémités oesophagiennes normales. L'intervention chirurgicale directe d'urgence n'est pas indispensable puisque le contenu du segment supérieur de l'oesophage peut être aspiré prévenant ainsi la régurgitation intra-trachéale du mucus oesophagien et l'alimentation peut être assurée par gastrostomie ou par jéjunostomie. C'est seulement quand les anomalies associées ou les complications pulmonaires ont été traitées avec succès que l'intervention réparatrice est entreprise. Lorsque la distance qui sépare les deux extrémités de l'oesophage est importante il est habituellement possible de rapprocher celles-ci à l'aide des bougies et aussi en réalisant des myotomies oesophagiennes pendant une période de temps suffisante. Les complications à redouter après la chirurgie réparatrice sont les suivantes: sténose de l'anastomose, récidive de la fistule trachéo-oesophagienne, troubles moteurs oesophagiens, trachéomalacie, reflux gastro-oesophagien avec régurgitation, oésophagite et troubles de l'absorption alimentaire.
    Abstract: Resumen Se revisa la embriogénesis de la atresia esofágica. La atresia esofágica se encuentra frecuentemente asociada con otras anomalías congénitas predecibles y con prematuridad. El manejo de la atresia esofágica varía de acuerdo al tamaño y vigor del bebé, a la gravedad de las anomalias asociadas y a la distancia entre las dos extremidades del esófago. La reparatión quirúrgica no reviste urgencia, por cuanto el paciente puede ser mantenido con succión del esófago proximal para prevenir la aspiración de moco y con alimentación por vía de gastrostomia o yeyunal. Una vez que las anomalías asociadas o las complicaciones pulmonares hayan sido resueltas, la reparación definitiva puede ser realizada. Si existe una distancia considerable entre los extremos del esófago, es usualmente factible, en el curso de un tiempo, acercar estos extremos mediante el estiramiento con bujías y mediante la realización de una serie de miotomías esofágicas. Las complicaciones que pueden presentarse después de la reparación incluyen la estrechez de la anastomosis, la fístula traqueoesofágica recurrente, las alteraciones en la motilidad esofágica, la traqueomalacia, el reflujo gastroesofágico con aspiración, la insuficiente ingesta calórica y la esofágitis.
    Notes: Abstract The embryogenesis of esophageal atresia is reviewed. Esophageal atresia is frequently associated with other predictable anomalies and prematurity. The management of esophageal atresia will vary according to the size and vigor of the baby, the severity of complicating anomalies, and the distance between the 2 esophageal ends. Surgical repair is not urgent, since the infant can be maintained by sump suction of the proximal esophagus to prevent aspiration of mucus and by gastrostomy or jejunal feedings. When associated anomalies or pulmonary complications have been resolved, the definitive repair is performed. If there is a long distance between the esophageal ends, it is usually possible over a period of time to bring the 2 ends close together by bougie stretching and by performing a series of esophageal myotomies. Complications that should be anticipated following repair include anastomotic stricture, recurrent tracheoesophageal fistula, esophageal dysmotility, tracheomalacia, and gastroesophageal reflux with aspiration, impaired caloric intake, and esophagitis.
    Type of Medium: Electronic Resource
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