title: Drainage and reflux characteristics of antireflux ureteral double-J stents.
abstract: We tested three antireflux double-J stents and compared them with common double-J stents in ex vivo canine urinary systems. At a physiologic flow rate, the drainage function of the antireflux stents proved to be sufficient; however, at a supraphysiological flow rate, drainage was inferior to that of the common double-J stent. Our reflux study demonstrated high-grade reflux with the common double-J stent, which transmitted more than 90% of the bladder pressure to the renal pelvis. The antireflux stents prevented this to a certain degree by both a reduction in and a delay of pressure transmission to the renal pelvis. In preliminary clinical trials, vesicorenal reflux was not detectable radiologically with the antireflux stents.
authors.affiliation: Department of Urology, University of California School of Medicine, San Francisco.
authors.forename: W A
authors.initials: WA
authors.lastname: Hübner
authors.forename: E G
authors.initials: EG
authors.lastname: Plas
authors.forename: F
authors.initials: F
authors.lastname: Trigo-Rocha
authors.forename: E A
authors.initials: EA
authors.lastname: Tanagho
mesh_terms: D000818:Animals; D004285:Dogs; D004322:Drainage; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D015607:Stents; D014718:Vesico-Ureteral Reflux / Q000601:surgery*