Internal prosthetic appliance of ureter (experimental study)
Kirpatovskiĭ, V.I.; Mudraia, I.S.; Martov, A.G.; Obukhova, G.V.
Urologiia 2: 28-34
2000
ISSN/ISBN: 1728-2985 PMID: 11186725 Document Number: 514446
In experiment, endoprosthetic appliances were placed in the intact ureters of 5 dogs, in previously created stricture also in 5 dogs. Three types of endoprostheses were used: nitinol thermo-extensible spiral prosthesis (Russia), reticular extensible vascular endoprosthesis Wallstent (Schneider, Switzerland) and tough teflon biliary prosthesis (Olympus, Japan). The dogs were followed up 1-36 months. Regardless of the prosthesis type, in good patency, in all the cases excretory urography and dynamic nephroscintigraphy demonstrated moderate dilatation of the upper urinary tracts, slowing down of urine evacuation. Urodynamic investigations detected arise in intraureteral basal and peristaltic pressure, transient more frequent contractions above the prosthesis and persistent less frequent contractions of the distal ureter, increased amplitude of the contractions. The contractions became arrhythmic, retrograde waves arose. Later, some dogs had chaotic contractions. It is concluded that endoprostheses reestablish patency of the urinary tracts but hinder contractions in part of the ureter thus affecting negatively urodynamics.