title: Nitinol urethral stents: long-term results in dogs.
abstract: No information has been available to date on the long-term behavior of nitinol (nickel-titanium alloy) urethral stents. In the present study, prostheses of this type were implanted in 18 German shepherd dogs in order to evaluate the reaction of the mucosa, muscles and periurethral tissue. Follow-up examinations performed after 1 week, and 1, 3, 6, 12 and 18 months included urine, macroscopic, radiologic, histologic and scanning electron microscopic analyses. Despite the excellent biocompatibility of the material, with no evidence of foreign body reactions or corrosion, there were no complete incorporations of the stent by epithelialization. Clinical application therefore appears to be problematic.
authors.affiliation: Department of Urology, University of Vienna, Austria.
authors.forename: D
authors.initials: D
authors.lastname: Latal
authors.forename: J
authors.initials: J
authors.lastname: Mraz
authors.forename: P
authors.initials: P
authors.lastname: Zerhau
authors.forename: M
authors.initials: M
authors.lastname: Susani
authors.forename: M
authors.initials: M
authors.lastname: Marberger
mesh_terms: D000497:Alloys; D000818:Animals; D004285:Dogs; D015607:Stents; D014521:Urethra / Q000601:surgery* / Q000648:ultrastructure; D014525:Urethral Stricture / Q000473:pathology / Q000601:surgery*
chemical_list: D000497:Alloys; C013616:nitinol