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Vol. 39. Issue 5.
Pages 327-331 (June 2015)
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Vol. 39. Issue 5.
Pages 327-331 (June 2015)
Skill and talent
Micro-ureteroscopy: Initial experience in the endoscopic treatment of pelvic ureteral lithiasis
Micro-ureteroscopia: Experiencia inicial en el tratamiento endoscópico de litiasis de uréter pelviano
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J.P. Caballero
Corresponding author
juanpablocaballero@gmail.com

Corresponding author.
, J.A. Galán, A. Verges, A. Amorós, A. Garcia-Segui
Servicio de Urología, Hospital del Vinalopó, Elche, Alicante, Spain
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Abstract
Objectives

To present the first case of ureteral lithiasis resolved using a new endoscopic approach, which we call micro-ureteroscopy (m-URS), and attempts to reduce the ureteral damage caused by conventional instrumentation.

Material and methods

We selected a 53-year-old patient with a 16-mm calculus in the right distal ureter. For endoscopic access, we used a 4.8-Fr sheath from the microperc set and fragmented the stone with a 230-micron laser fiber.

Results

Complete fragmentation of the stone was achieved. We placed a JJ catheter due to significant ureteral edema. The surgical time and postsurgical stay were 156min and 24h, respectively. There were no complications, the requirements for analgesia were minimal, and the patient was free of residual stones.

Conclusions

The m-URS technique is feasible, simple and effective for the treatment of pelvic ureteral lithiasis in women and optimizes minimal invasion, with results that can be comparable to conventional endoscopic techniques in terms of ease of access and quality of endoscopic vision without affecting the resolution capacity. Larger studies and greater technological development are needed to define the definitive role of this procedure. Currently, its major limitations lie in the treatment of proximal ureter lithiasis and in the treatment of men. This technique could also be a viable alternative for pediatric patients.

Keywords:
Ureteroscopy
Miniaturization
Laser
Lithotripsy
Urinary lithiasis
Resumen
Objetivos

Presentar el primer caso de litiasis ureteral resuelto mediante un nuevo abordaje endoscópico que denominamos micro-ureteroscopia (m-URS) y que pretende reducir el daño ureteral que se produce por el instrumental convencional.

Material y métodos

Seleccionamos a una paciente de 53 años de edad con una litiasis de 16mm en el uréter distal derecho. Para el acceso endoscópico empleamos la vaina de 4,8Fr del set de micro-Perc y fragmentamos la litiasis con una fibra láser de 230μ.

Resultados

Se consiguió la fragmentación por completo de la litiasis. Colocamos un catéter JJ debido al importante edema ureteral. El tiempo quirúrgico fue de 156min y la estancia posquirúrgica de 24h. No hubo complicaciones, los requerimientos de analgesia fueron mínimos y la paciente quedó libre de litiasis residuales.

Conclusiones

La m-URS es una técnica factible, sencilla y eficaz en el tratamiento de litiasis ureteral pelviana en mujeres, que optimiza la mínima invasión con unos resultados que pueden ser equiparables a las técnicas endoscópicas convencionales en cuanto a la facilidad del acceso y la calidad de visión endoscópica sin afectar la capacidad resolutiva. Se requiere de estudios más potentes y de un mayor desarrollo tecnológico para definir el rol definitivo de este procedimiento. Las mayores limitaciones actuales residen en el tratamiento de litiasis en el uréter proximal o en varones. Podría ser una buena alternativa también en pacientes pediátricos.

Palabras clave:
Ureteroscopia
Miniaturización
Láser
Litotricia
Litiasis urinaria

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