Which kidney stone surgery is safer for your ureter? a large study investigates
NCT ID NCT07767773
First seen Aug 17, 2026 · Last updated Aug 17, 2026
Summary
This study looks back at adults who had surgery for kidney stones up to 20 mm, comparing those who had a ureteral access sheath placed during the procedure with those who did not. The goal is to see whether using the sheath affects the risk of developing a narrowed ureter or hydronephrosis (kidney swelling) at least a year later. By reviewing medical records and inviting patients for follow-up, researchers hope to identify which approach is safer for long-term kidney and urinary tract health.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- Ureteral access sheath-assisted retrograde intrarenal surgery (RIRS) versus sheathless RIRS
- What this could lead to
- If the sheath is found to be safer, it could guide surgeons to choose the approach that reduces the risk of long-term ureteral damage after kidney stone surgery.
- What could go wrong
- This is a retrospective study, so it can only show associations, not proof. Results may be affected by differences between patient groups, and the follow-up is at least 12 months, which may not capture all long-term complications.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Department of Urology, Al-Hussein and Sayed Galal University Hospitals, Al-Azhar University
Cairo, Egypt
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