Shape-memory alloy net-like stent for the management of ureteral stricture: a long-term follow-up report
Song, Y.; Li, M.; Na, Y-qun.
Zhonghua Yi Xue Za Zhi 85(42): 2992-2994
2005
ISSN/ISBN: 0376-2491 PMID: 16324387 Document Number: 591343
To investigate the long-term outcome of treatment of ureteral stricture with shape-memory alloy net-like stent. Nickel-titanium shape-memory alloy net-like stent was used to treat 9 patients with ureteral stricture, 4 males and 5 females, aged 41 (29-63), with the length of ureteral stricture of 1.0-4.0 cm, the etiology being radical operation for rectal carcinoma in 2 cases, chronic inflammation in 3 case, and operation for benign diseases in 4 cases. A total of 10 stents were inserted under spinal anesthesia. The mean follow-up time was 27.2 months (5-96 months). Ureteral obstruction was relieved in 7 cases (77.8%) with the relief or disappearance of hydronephrosis. The ureteral stents were blocked and re-obstruction appeared in 2 cases within 5-6 months due to hyperplasia of fibrous tissue. One of the cases underwent removal of stent and the other case underwent insertion of double-J with improvement of renal function. No radiological evidence of migration of stent and encrustation was found. More tolerable and with less side-effect and lower re-stricture rate, shape-memory alloy stent is better then Double-J in treatment of ureteral obstruction.