for people ages 18 years and up (full criteria)
at San Diego, California and other locations
study started
completion around



The purpose of this study is to determine how soon ureteral stents can be safely removed following surgery.

Official Title

Effect of Three vs Seven Day Ureteral Stent Removal After Ureteroscopy on Stent Related Symptoms


The rationale for this study is to determine if there is a difference in symptoms or complications among patients undergoing uncomplicated ureteroscopy for stone removal with shorter indwelling stent duration. Currently there are only a few small studies exploring the optimal duration of stent placement after stent placement and no multicenter randomized control trials. The investigation aim is to determine if earlier ureteral stent removal will reduce urinary symptoms after stent removal and improve quality of life without increasing risk of negative side effects. Using questionnaires for stent related symptoms the researchers will assess stent indwelling time effect on patient reported side effects.


Ureteral Stent, Uncomplicated Ureteroscopy and Stent Placement for 3-5 days, Uncomplicated Ureteroscopy and Stent Placement for 7-9 days


You can join if…

Open to people ages 18 years and up

  • Participants undergoing unilateral stone treatment. Patients may have stones present bilaterally, but must only be having unilateral intervention.
  • The ureteroscopy must be uncomplicated
  • Patients undergoing semi-rigid ureteroscopy only, flexible ureteroscopy only, or a combination

You CAN'T join if...

  • Pregnancy
  • A stent or nephrostomy tube placed prior to surgery
  • Complex ureteroscopy - ureteral injury, ureteral perforation, ureteral stricture, impacted stone
  • Infection or struvite stones
  • Recurrent Urinary Tract Infection (UTI): 2 culture proven UTI in 6 months or 3 culture proven UTIs in one year
  • No stone evident on ureteroscopic evaluation of ureter or kidney
  • Transplant kidney
  • Variant anatomy (horseshoe, pelvic kidney)


  • University of California San Diego
    San Diego California 92122 United States
  • Mayo Clinic Arizona
    Phoenix Arizona 85054 United States


accepting new patients by invitation only
Start Date
Completion Date
Mayo Clinic
Study Type
Expecting 172 study participants
Last Updated