Endovascular therapy of renal artery stenoses with a new, premounted, balloon-expandable stent

Citation
B. Djavidani et al., Endovascular therapy of renal artery stenoses with a new, premounted, balloon-expandable stent, ROFO-F RONT, 173(7), 2001, pp. 619-625
Citations number
28
Language
TEDESCO
art.tipo
Article
Categorie Soggetti
Radiology ,Nuclear Medicine & Imaging
Journal title
ROFO-FORTSCHRITTE AUF DEM GEBIET DER RONTGENSTRAHLEN UND DER BILDGEBENDEN VERFAHREN
ISSN journal
1438-9029 → ACNP
Volume
173
Issue
7
Year of publication
2001
Pages
619 - 625
Database
ISI
SICI code
1438-9029(200107)173:7<619:ETORAS>2.0.ZU;2-B
Abstract
Purpose: Evaluation of the handling, technical success rate, and six-months patency rate of a new, premounted balloon-expandable stent in ostial renal artery stenoses. Material and Methods: in a prospective study, 27 ostial r enal artery stenoses in 20 patients were primarily treated with the new "Re nal Bridge Stent" (Medtronic AVE, Dusseldorf). All patients had a history o f hypertension and 8 patients had renal dysfunction. The handling and visib ility of the stent was scored on a three grade scale by the operators. Foll ow-up angiography including intra-arterial trans-stenotic pressure measurem ents was performed in 23 out of 27 stenoses (17 patients). Results: Handlin g and visibility were scored as good by all operators. 26 of 27 stenoses we re treated with technical success by implantation of 28 stents. The mean de gree of stenosis was reduced from 74.2% to less than 5%. At 6 months, 8 ste nts out of 23 (35%) showed a significant in-stent stenosis (stenosis degree > 50% and intra-arterial pressure gradient > 10 mmHg). The stenosis rates were 63% using 5-mm stents, 30% using 6-mm stents, and 0% using 7-mm stents . Conclusion: Endovascular treatment of ostial renal artery stenosis with t he used stent is safe and effective. The new stent shows a good handling an d visibility. The high rate of in-stent stenoses might be explained by the rigid follow-up protocol including angiography, trans-stenotic pressure mea surements, and the high number of 5-mm vessels in our study.