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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 23 (1972), S. 85-96 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Probability theory and related fields 5 (1966), S. 71-88 
    ISSN: 1432-2064
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary A locally asymptotically most powerful test for composite hypotheses with t independent linear constraints on the parameters has been developed for the case where the observed random variables {X nk , k=1,2,...,n} are independently but not necessarily identically distributed. However, their distributions depend on two vector parameters, one ξ = (ξ 1, ξ 2, ..., ξ t) being under test, and the other θ = (θ 1, θ 2, ..., θ s) being the nuisance parameter.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 17 (1993), S. 374-384 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé La maladie de Hirschprung est rare (une sur 5000 naissances), atteint surtout les garçons, mais constitue une cause fréquente d'occlusion chez le nouveau-né. Elle se caractérise par l'absence de cellules ganglionnaires dans l'intestin distal d'extension proximale variable. Dans 75% des cas, elle n'intéresse que le rectum et colon sigmoïde. Le diagnostic repose sur la clinique, les données de la manométrie anorectale et surtout l'examen anatompathologique, qui seul confirme la zone aganglionnaire. Le traitement est une reconstruction colorectale, soit traditionnellement en deux-temps, soit, de plus en plus souvent, en un seul temps opératoire. L'association d'une entérocolite est une complication grave et nécessite, en urgence, une réanimation adaptée et souvent une colostomie.
    Abstract: Resumen La enfermedad de Hirschsprung es una causa relativamente común de obstrucción intestinal en el recién nacido. Se caracteriza por ausencia de las células ganglionares en el colon distal a partir del esfínter interno hasta distancias variables en sentido proximal. La aganglionosis aparece confinada al rectosigmoide en 75% de los pacientes, al sigmoide, ángulo esplénico o colon transverso en 17%, y a la totalidad del colon con un corto segmento del ileon en 8% de los pacientes. La aganglionosis intestinal total con ausencia de células ganglionares desde el duodeno hasta el recto constituye la forma más rara dse enfermedad de Hirschsprung. Se estima la incidencia de la enfermedad de Hirschsprung en 1 en 1.500 nacimientos vivos. Spouge y Baird estudiaron la incidencia en la prpovincia de British Columbia y reportan una tasa de 1 en 4.417. La entidad es más común en los niños, con una relación masculino: femenino de 4∶1, pero esta mayor prevalencia en el sexo masculino es menos evidente en los pacientes con largos segmentos afectados, donde la relación de sexos es 1.5∶2.1. En este artículo se revisa la etiología, patofisiología, patología, cuadros clínicos, métodos de diagnóstico y manejo. La enterocolitis se mantiene como la complicación más grave de la enfermedad de Hirschsprung y se asocia con alta morbilidad y mortalidad.
    Notes: Abstract Hirschsprung's disease (HD) is a relatively common cause of intestinal obstruction in the newborn. It is characterized by an absence of ganglion cells in the distal bowel beginning at the internal sphincter and extending proximally for varying distances. The etiology of HD-associated enterocolitis remains a complex issue. This study has provided further support for a possible infectious etiology of enterocolitis complicating HD.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 10 (1995), S. 79-81 
    ISSN: 1437-9813
    Keywords: Appendiceal mass ; Appendicitis ; Child
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A total of 198 were diagnosed to have an appendiceal mass between 1982 and 1991;9 underwent appendicectomy immediately following diagnosis. One developed a wound infection. Of the remaining 189 patients 162 (85.7%) had unevenful resolution of the mass. The mean duration of hospital stay was 9.7 days. Twenty-seven patients failed to respond to initial non-operative management; 16 developed an appendix abscedd and required drainage. One patient had percutaneous drainage under ultrasound control. One of these 16 patients developed a wound infection after interval appendicectomy. Four other patients underwent appendicectomy during the initial admission because of clinical deterioration and all of them were found to have an appendix mass at operation. Three of these 4 patients developed postoperative complications (wound infection 1, intra-abdominal abscess 1, small-bowel obstruction 1). Seven other patients required admission and appendicectomy while waiting for interval appendicectomy. At operation, 5 still had an appendiceal mass/ abscess and 2 had acute appendicitis. The child with an appendiceal abscess continued to have a discharging wound for 19 days. All others, except 3 patients who were lost to follow-up, underwent interval appendicectomy. Mean duration of hospital stay for interval appendicectomy was 301 days. Two patients who did not return for elective appendicectomy developed acute appendicitis and required appendicectomy 65 days and 8 months after discharge. Three (1.9%) of 161 patients (all in the first half of the series) developed postoperative complications following interval appendicectomy (wound hematoma 1, wound infection 1. pneumonia 1). Evidence of inflammation was present on histological examination in 47.2% of the cases. These data support the belief that initial non-operative management of an appendiceal mass followed by interval appendicectomy is a safe and effective method of management.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 10 (1995), S. 76-78 
    ISSN: 1437-9813
    Keywords: Appendicitis ; Active observation ; Child
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract An audit was undertaken to assess the outcome of patients aged less than 16 years who underwent appendicectomy after active obsevation. A comparison was made of the incidence of perforation, complications, and hospital stay of patients who underwent emergency appendicectomy (group A) and those who were operated upon after active observation (group B). A total of 1,672 patients were admitted with acute abdominal pain. Emergency appendicectomy following the diagnosis of acute appendicitis on admission was performed in 744 patients (group A); an appendicectomy was performed in 123 patients following active observation (group B). In group A, 140 patients (18.8%) were found to have macroscopic or microscopic perforations; a normal appendix was removed in 75 (10.1%) cases and 31 (4.2%) patients developed postoperative complications. In group B, perforations occurred in 19 (15.1%) patients, normal appendix was encountered in 25 (19.8%), and postoperative complications occured in 7 (5.5%). The overall normal appendicectomy rate was 11.5%. Mean duration of hospital stay was 3.5 days in group A and 4.7 days in group B. The remaining patients who were actively observed and did not require surgery were discharged when their symptoms and signs had resolved. The study illustrates that appendicectomy after a period of active observation in hospital fro acute abdominal pain carries no increase in morbidity compared with urgent appendicectomy.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 3 (1988), S. 141-146 
    ISSN: 1437-9813
    Keywords: Hirschsprung's disease ; Enterocolitis ; Immunocytochemistry ; Mucins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Mucosal defence mechanisms of the excluded bowel were studied in 12 patients with Hirschsprung's disease. The entire resected segment of colon obtained following Swenson's operation was cut at 0.5-cm intervals and serially examined by routine haematoxylin and eosin staining, immunocytochemistry, and mucin histochemistry. Seven patients who had clinical evidence of enterocolitis prior to defunctioning colostomy showed histological and immunological evidence of enterocolitis (crypt abscesses, ulceration, leucocyte aggregation, Paneth cell metaplasia, and marked immunocyte responses) in the excluded bowel even several months after diversion of the faecal stream. Mucin histochemistry showed marked depletion of neutral mucins and sulphomucins in the excluded bowel with inflammatory changes and reversal of the sialo- to sulphomucin ratio. These results indicate that patients with enterocolitis complicating Hirschsprung's disease have persistent inflammatory changes in the excluded large bowel after diversion of the faecal stream by colostomy. Environmental factors such as bacterial stimulation and proliferation probably cause inhibition of cell renewal, resulting in abnormalities of mucin fractions. Changes in mucin composition, which is an important mechanical and chemical factor of the mucosal defence mechanism, may lead to altered susceptibility to bacterial degradation and hence may be important in the pathogenesis of enterocolitis.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 3 (1988), S. 156-157 
    ISSN: 1437-9813
    Keywords: Inguinal hernia in the newborn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Seventy consecutive neonates presented with inguinal hernia during a 15-year period. There were 69 males and 1 female. Fifty-one infants were born at full-term and 19 were premature. Sixty-one (87%) neonates presented as an emergency with incarverated inguinal hernia. Only 3 babies with incarceration required emergency operation and in the remaining 58 (95%) patients it was possible to reduce the incarcerated hernia manually and do an elective herniotomy. At follow-up, 3 (5%) of the boys who presented with incarceration were noted to have testicular atrophy. Contralateral inguinal exploration revealed a hernial sac or a patent processus vaginalis in 70% of babies. Two of the 6 boys who had an orchidopexy performed for cryptorchism at the time of herniotomy required a subsequent revision orchidopexy.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 4 (1989), S. 326-331 
    ISSN: 1437-9813
    Keywords: Hirschsprung's disease ; Electron-microscopy ; Schwann cells ; Monoclonal antibodies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The pathophysiology of Hirschsprung's disease is not fully understood. Using light microscopy we have previously demonstrated the absence of a unique Schwann-cell antigen in the circular muscle of aganglionic colon identified by D7 monoclonal antibody. In an attempt to characterise the morphological changes in neuronal cells at subcellular level, we studied innervation patterns in normal and aganglionic colon by electron microscopy. The most striking observation on ultrastructural serial examination of the entire resected specimen of colon from patients with Hirschsprung's disease was the presence of grossly swollen monoaxonal or oligoaxonal Schwann cell units with loss of cellular contents in the circular muscle of aganglionic colon. The extent of subcellular changes in Schwann cells and axons corresponded with a diminution of immunoreactivity with a panel of neuronal cell antibodies. These ultrastructural findings suggest that degenerative changes in Schwann cells and axons within the circular muscle coat of aganglionic segment may be a significant factor in the pathogenesis of Hirschsprung's disease.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 6 (1991), S. 269-272 
    ISSN: 1437-9813
    Keywords: Vesicoureteric reflux ; Children ; Endoscopic treatment ; Polytetrafluoroethylene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract During a 4-year period 123 children (191 ureters) with primary vesicoureteric reflux (VUR) were treated endoscopically by subureteric Teflon injection (STING). They have now been followed up for periods ranging from 2 to 6 years. Sixty per cent of the ureters had grade III VUR and 36% had either grade IV or grade V. Reflux was corrected in 149 (78%) ureters after a single injection of polytef paste; 11 (6%) ureters showed improvement to grade I or II reflux after one injection and no further treatment was given; 24 (12%) ureters required two injections and 7 (4%) needed three to four subureteric injections for the correction of VUR. Of the 123 patients, 116 were discharged from the hospital on the day of the procedure. Of the 149 ureters corrected with one subureteric injection, 83% required less than 0.3 ml paste per ureter to stop reflux. At follow-up micturating cystography 91% of the ureters continue to show absence of reflux 2 to 6 years after endoscopic correction; 9% had recurrence of reflux, but more than one-half of the recurrences were only of grade I or grade II severity and required no further treatment. Seven ureters had recurrent grade III or IV reflux and were reinjected without any difficulty. There was no evidence of delayed appearance of vesicoureteric obstruction. Treatment of primary VUR by endoscopic subureteric injection of polytef paste was found simple, safe, and effective in correcting all grades of VUR.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Pediatric surgery international 7 (1992), S. 306-307 
    ISSN: 1437-9813
    Keywords: Appendicitis ; Duodenal obstruction ; Newborn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The case of a premature infant with a simultaneous occurrence of appendiceal perforation and incomplete fixation of the colon producing early obstruction of the duodenum is reported. The clinical examination and laboratory and radiological investigations were all negative for the diagnosis of appendicitis, which was found incidentally at laparotomy for duodenal obstruction.
    Type of Medium: Electronic Resource
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