[Treatment of ureteral obstruction with auto-expandable metallic endoprosthesis].
OBJECTIVE
To evaluate the efficacy of Nitinol (Memotherm) self-expandible metal stents in the treatment of malignant and non-malignant ureteral obstruction in patients who are not eligible for surgery.


METHODS
A total of 14 ureteral strictures (5 malignant, 9 non-malignant) in 13 patients were treated by the implantation of a Nitinol endoprosthesis. Eight were implanted by the antegrade and 6 by the retrograde route. A mean of 1.3 stents were implanted per patient.


RESULTS
85% of the stents were patent at a mean follow-up of 10.2 months (range 2-28). Four prostheses developed transient obstruction that was resolved by insertion of a double-J catheter for periods that ranged from 2 to 6 months. One stent required a permanent double-J catheter and another stent showed functional obstruction, although it was morphologically patent.


CONCLUSIONS
The Nitinol self-expandible metal stent is effective in the treatment of malignant and non-malignant ureteral obstructions in patients who are not eligible for surgery due to the tumor stage or high surgical risk.
Burgos Revilla
F J
FJ
Servicio de Urología, Hospital Ramón y Cajal, Madrid, España.
Gómez Dosantos
V
V
Carrera Puerta
C
C
Sánchez Encinas
M
M
Pascual Santos
J
J
Llorente
T
T
Escudero Barrilero
A
A
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000497:Alloys; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015607:Stents; D014517:Ureteral Obstruction / Q000628:therapy*
D000497:Alloys; C013616:nitinol
Tratamiento de la obstrucción ureteral mediante endoprótesis metálicas autoexpandibles.