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Inicio Actas Urológicas Españolas Tratamiento endourológico de estenosis ureterales. Estudio experimental compara...
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Vol. 29. Issue 3.
Pages 296-304 (January 2005)
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Vol. 29. Issue 3.
Pages 296-304 (January 2005)
Tratamiento endourológico de estenosis ureterales. Estudio experimental comparativo
Endourologic treatment of ureteral strictures. experimental comparative study
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F. Soria Gálvez**,1, L.Á. Rioja Sanz*, M. Blas Marín*, Mª.E. Durán Flores**, J. Usón Gargallo**
** Unidad de Endoscopia. Centro de Cirugía de Mínima Invasión. Cáceres
* Servicio de Urología. Hospital Miguel Servet. Zaragoza
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Resumen
Objetivo

Los objetivos de este estudio son la comparación de la eficacia y la eficiencia entre dos técnicas endourológicas para el tratamiento de estenosis ureterales en modelo animal, así como la valoración histológica de la cicatrización ureteral.

Material y métodos

Se emplearon 10 animales de la sp. porcina. A los que se les sometió a un modelo experimental de estenosis ureteral. Transcurridas 4 semanas se realiza el diagnóstico de la obstrucción urinaria. Dividimos a los animales en 2 grupos:

-Grupo I. (5 animales), endoureterotomía con balón hasta la ruptura ureteral.

-Grupo II (5 animales), tratamiento mediante Acucise®.

Se disponen catéteres doble pigtail durante 3 semanas. Realizándose el seguimiento a las 4 semanas de la extracción de los mismos.

Resultados

Todos los animales del estudio mostraron signos de obstrucción urinaria tras 4 semanas de la ligadura ureteral. De los 10 animales, uno de cada grupo necesitó una segunda aplicación de la técnica en la misma sesión. Encontramos en el Grupo I, la migración en sentido vesical de un catéter ureteral que provoca la restenosis. Tras la valoración de los resultados determinamos que el porcentaje de éxito es de un 80% en el grupo I y de un 100% en el II.

Conclusiones

A la vista de los resultados obtenidos en nuestro estudio las dos técnicas se muestran efectivas, aunque el Acucise® se mostró más eficiente. No encontramos evidencias histológicas que avalen los estudios de cicatrización de Davis tras la endoureterotomía.

Palabras clave:
Uréter
Porcino
Endoureterotomía
Modelo experimental
Estenosis
Ultrasonidos endoluminales
Abstract
Objectives

to compare efficacy and efficiency of two different endourological therapies for ureteral stricture, and to evaluate pathological reactions of the ureters following both endourological techniques.

Material and methods

Ten pigs underwent experimental induction of ureteral stricture. Four weeks later, ureteral strictures were demonstrated by imaging techniques. Animals were divided in two groups, according to the received therapy:

-Group I. (5 pigs), endoballoon rupture endoureterotomy.

-Group II (5 pigs), Acucise® balloon endoureterotomy.

Ureteral stents were placed for 3 weeks following endoureterotomy. Animals were followed up four weeks after ureteral stents retrieval.

Results

In all cases, ureteral stricture was proved four weeks after model induction. In one case from each group, it was needed a second balloon dilatation to achieve complete endoureterotomy. Leading to ureteral restenosis, stent migration occurred in one animal from group I. Success was achieved in 80% of cases from group I, and 100% of cases from group II.

Conclusions

Our results suggest that both endourological therapies are effective. Nevertheless, a higher efficiency was proved with Acucise® endoureterotomy. Our pathological evidences do not support Davis’s studies on ureteral healing following endoureterotomy.

Key words:
Ureter
Swine
Endoureterotomy
Experimental model
Stricture
Endoluminal ultrasound

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