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3

The MemokathTM051-stent provides effective and durable drainage of ureteral strictures due to periaortal or retroperitoneal fibrosis.

Wednesday, 8 June, 2011 - 11:16
Board 1

The MemokathTM051-stent provides effective and durable drainage of ureteral strictures due to periaortal or retroperitoneal fibrosis. Introduction: Periaortal and retroperitonel fibrosis often result in ureteral strictures that may require permanent stenting. JJ-stents are associated to well-known side-effects and they need to be changed regularly. The MemokathTM051 (PNN Medical, Denmark) - a thermo-expandable ureteral metal stent - is designed for the long-term/permanent management of chronic ureteral strictures, and the aim of the present study was to evaluate the use of the MemokathTM051-stent in the treatment of chronic ureteral strictures in such patients.     Materials and Methods: A total of 35 consecutive patients (17 F, 18 M) were included. In 15 patients the ureteral strictures were due to periaortal fibrosis and in 20 cases retroperitoneal fibrosis. 24 were unilaterally and 11 bilaterally treated. A total of 62 stents were used. Mean age was 63 years. The follow-up included KUB and renography.     Results: The insertion of the MemokathTM051 was easy and without serious complications. The average indwelling time of an individual MemokathTM051 was 26 months (range 8 days - 114 months), in patients with periaortal fibrosis 27 months and in patients with retroperitoneal fibrosis 25 months. The complication that occurred most often was migration distally, which happened in 10 cases (16 %). Migration occurred in an average of 12 months after insertion (range 1 - 25 months). Incrustations were seen in 8 stents (13 %).     Conclusion: The MemokathTM051-stent seems to be especially well suited for long-term treatment of chronic ureteral strictures due to periaortal or retroperitoneal fibrosis without the high rate of side-effects of JJ-stenting.        

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ENDOUROLOGY