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1.
Rev. chil. urol ; 72(2): 195-198, 2007. tab
Artigo em Espanhol | LILACS | ID: lil-545959

RESUMO

En vejigas patológicas que requieren de ampliación por fracaso al tratamiento médico, clásicamente se han realizado ampliaciones vesicales con segmentos gastrointestinales; sin embargo, en niños hemos tenido complicaciones debido al mucus que producen: cateterismo difícil, infección tracto urinario (ITU), litiasis, perforación, desbalance electrolítico y potencial desarrollo de malignidad. Es por esto que desde el año 1993 hemos iniciado un programa de ampliaciones vesicales no secretoras. Materiales y método: Se estudiaron retrospectivamente los pacientes ampliados en nuestro servicio, se realizaron55 ampliaciones vesicales de los cuales en 21 fue con uréter, 7 autoampliaciones mas segmento intestinal desmucosado, y 29 con sigmoides desmucosado. Se analizó patología, indicación, estudio preoperatorio, técnica quirúrgica, cirugía complementaria y su seguimiento con especial interés en las complicaciones. Resultados: La edad promedio fue 8 años, la patología de base más frecuente fue la vejiga neurogénica y el seguimiento global promedio fue de 44 meses. Al analizar por grupos: en las 21 ureterocistoplastias se uso 1 uréter completo en 8 casos, los 2 uréteres en 4, y en 9 se uso solo un segmento ureteral (tranureteroanastomosis), en 4 de estos pacientes se realizó Mitrofanoff. La capacidad vesical mejoró en un 37,5 por ciento en los pacientes en que se usó 1 o los 2 uréteres, y 230 por ciento en los que se uso solo un segmento ureteral. Se observaron 3 complicaciones, 2 de ellas de resolución quirúrgica. En los 29 pacientes en que se realizó ampliación vesical con sigmoides desmucosados la capacidad vesical aumento en un 339,5 por ciento y la acomodación en 876 por ciento. Se realizó centrifugado de orina observándose un 7,5 por ciento de mucosidad(0-30 por ciento) en comparación con 95 por ciento de mucosidad en las ampliaciones secretoras. La cistoscopía con biopsia se realizó en un tercio de los pacientes, en mas de un 90 por ciento...


Bladder augmentation in the adult has classically been performed with gastrointestinal segments with excellent results. However in children our experience has shown severe difficulties associated with overproduction of intestinal mucus; infection, difficult catheterization, stone formation, electrolytic misbalance and potential malignancy are some of the complications associated with this procedure. In1993 we develop a protocol of non-secreting bladder augmentations for the pediatric patient. Material and Methods: We retrospectively analyzed 55 bladder augmentations performed at our institution. Out of the 55, 21 were with ureter, 7 auto-augmentations with intestinal segment (mucosa previously removed), 29 with sigmoid (mucosa previously removed). Perioperative data and outcomes were analyzed. Results:Mean age was 8 years. Neurogenic bladder was the most prevalent condition. Mean follow up was 44months. Out of the 21 cistoureteroplasties, 8 cases were done with only 1 ureter, 4 with both and in 9 cases only a partial segment of the ureter was used. In this group a Mitrofanoff valve was employed in 4patients. Bladder capacity was improved in 375 percent in bladder augmented with one or both ureter and in 230 percent in the ones with a partial ureteral segment. Complications were observed in 3 patients, 2 required surgical management. In the 29 bladders augmented with sigmoid, capacity and compliance increased in 339.5 percent and 876 percent respectively. Urine analysis showed 7.5 percent of mucus in comparison with 95 percent usually found in secreting augmentations. Control cystoscopy was performed in one third of the patients. In 90 percent biopsy of the augmented bladder showed urothelium with patches of digestive epithelium associated with glandular atrophy. Conclusion: The absence of complications derived from mucus secretion favor the use of this type of augmentation. Despite the fact that the use of ureter requires for previous ureternephrosis...


Assuntos
Humanos , Pré-Escolar , Criança , Adolescente , Adulto , Procedimentos Cirúrgicos Urológicos , Bexiga Urinaria Neurogênica/cirurgia , Bexiga Urinária/cirurgia , Complicações Pós-Operatórias , Estudos Retrospectivos , Mucosa Intestinal/transplante , Resultado do Tratamento , Urodinâmica , Ureter/transplante , Bexiga Urinária/fisiologia
2.
Int. braz. j. urol ; 30(4): 327-335, Jul.-Aug. 2004.
Artigo em Inglês | LILACS | ID: lil-383752

RESUMO

PURPOSE: The aim of the present study was to evaluate the biocompatibility of small intestine submucosa (SIS) in the reconstruction of the ureter in swine. MATERIALS AND METHODS: An experimental study was performed in 10 half-breed pigs weighing between 20 and 30 K, in which a previously prepared segment of SIS measuring approximately 2.0 cm was implanted in the upper third part of the right ureter. RESULTS: Of the 10 operated animals, one died 14 days after the surgery due to a dehiscence on the suture line of the implanted graft. The remaining 9 animals were submitted to ultrasound examination of the urinary tract and were sacrificed on the 40th postoperative day. The macroscopic evaluation showed no calculus, incrustation, fistula, abscesses or adhesions in the ureters with the graft. Microscopic evaluation with hematoxylin-eosin and Sirius red showed in the experimental area (graft) the presence of urothelium in 100 percent of the cases, collagen in 100 percent of the cases, and smooth muscle layer in 87.5 percent of the animals. In the area adjacent to the graft (proximal and distal), we observed 92.86 percent of urothelium, 42.86 percent of collagen and 71.43 percent of smooth muscle. In the contralateral ureter, it was found 100 percent of urothelium and smooth muscle and just 11.11 percent of collagen. The microscopic analysis of the kidneys whose ureters received the graft of SIS evidenced congestion in 55.55 percent, pelvic edema in 66.66 percent and interstitial nephritis in 77.78 percent. Hydronephrosis was present in 33.33 percent and chronic pyelonephritis in 44 percent. Only 1 animal presented total absence of glomerulus in the renal parenchyma. CONCLUSION: The SIS graft behaved as a biological tissue support, allowing the regeneration of the urothelium and smooth muscle grow, despite of chronic inflammatory process.


Assuntos
Animais , Feminino , Masculino , Mucosa Intestinal/cirurgia , Ureter/transplante , Colágeno/metabolismo , Intestino Delgado/cirurgia , Modelos Animais , Músculo Liso/metabolismo , Suínos , Fatores de Tempo , Transplante Homólogo , Resultado do Tratamento , Ureter/metabolismo
3.
Rev. chil. pediatr ; 65(5): 268-70, sept.-oct. 1994. tab
Artigo em Espanhol | LILACS | ID: lil-143953

RESUMO

Se estudiaron retrospectivamente las historias clínicas de 64 pacientes tratados con 94 reimplantes vesicoureterales entre los años 1986 y 1992 por diferentes causas, principalmente reflujo vesicoureteral. Se usaron técnicas de avance ureteral (Cohen y Gleen) en 76,6 por ciento de los casos; en el resto se reimplantó en un túnel largo en vejiga psoica, usando modelaje ureteral cuando fue necesario. En un caso se construyó un colgajo (flap) de Boari con anclaje psoico. El estudio postoperatorio mostró resultados satisfactorios en 96,5 por ciento de los implantes realizados por reflujo vesicoureteral primario y en 83,3 por ciento de los que se hicieron en pacientes con anomalías vesicales o ureterales. Ocho implantes vesicoureterales fracasaron por reflujo postoperatorio, pero no ocurrieron obstrucciones y las reoperaciones tuvieron buen éxito en todos los casos


Assuntos
Humanos , Masculino , Feminino , Lactente , Pré-Escolar , Adolescente , Obstrução Ureteral/cirurgia , Ureterocele/cirurgia , Bexiga Urinaria Neurogênica/cirurgia , Refluxo Vesicoureteral/cirurgia , Complicações Pós-Operatórias/cirurgia , Reimplante/métodos , Ureter/transplante
4.
Rev. mex. urol ; 52(4): 110-1, jul.-ago. 1992. tab
Artigo em Espanhol | LILACS | ID: lil-118444

RESUMO

Se comunica la experiencia de los autores en relación a los procedimientos previos a la selección de la técnica de reimplante ureteral. Técnica intravesical, 31 pacientes. Técnica extravesical, 26 individuos atendidos en el servicio de transplante renal pediátrico del hospital General del Centro Médico La Raza, IMSS.


Assuntos
Humanos , Masculino , Feminino , Pré-Escolar , Adolescente , Ureter/transplante , Transplante de Rim , Anastomose Cirúrgica , Insuficiência Renal Crônica/cirurgia
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