I-stent ye-silicone urethral yesikhathi eside iyithuluzi lezokwelapha elenzelwe ukufakwa isikhathi eside ku-urethra noma ku-ureter. Inhloso yalo eyinhloko ukusekela izindlela zomchamo ezincishisiwe noma ezonakele kanye nokukhipha umchamo. Ifanele iziguli ezidinga ukuphambukiswa komchamo isikhathi eside (kusukela ezinyangeni eziningana kuya onyakeni owodwa) noma ukwesekwa kwendlela yokukhipha umchamo. Yenziwe nge-silicone yezinga eliphezulu lezokwelapha, le divayisi ibonisa ukuhambisana okuhle kakhulu kwezinto eziphilayo kanye nezakhiwo zokulwa nokuvuvukala, okwenza kube ukukhetha okuhle kwezimo zokubekwa isikhathi eside.

Ama-stents e-Tianck Medical Ureteral Amapayipi aguquguqukayo, angenalutho afakwa ku-ureter ukuze agcine ukugeleza komchamo kusuka ezinso kuya kwesinye lapho ukuphuma kwamanzi okuvamile kuvimbekile noma kuphazamisekile. Kubizwa nangokuthi ama-double J stents noma ama-JJ stents ngenxa yokuma kwe-pigtail kuzo zombili izinhlangothi zomkhiqizo.