This is performed for obstruction of the ureter either due to stone, stricture or tumor. May also be placed after ureteroscopy for prevention of kidney obstruction and ureteral scarring. Under general anesthesia a scope is inserted into the bladder through the urethra. A wire is placed into the kidney using xray guidance. The stent, a thin plastic tube, is then placed over the wire. The wire is removed and the stent remains in place, with coils at each end to prevent it from migrating up or down. It is performed as an outpatient and you will be discharged after the procedure. The stent is allowed to remain in place for a specified period of time, usually 7-10 days but it can remain in place for up to 3 months without the need to be changed. It is removed in the office using a cystoscope (a small lighted tube into the bladder) under local anesthesia. After effects may include blood in the urine, increased urgency and frequency of urination as well as some kidney and/or bladder pain.