Suction to collapse the kidney's collecting system after RIRS (retrograde intrarenal surgery)

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This randomized controlled trial compares active suction through a ureteral access sheath to induce collapse of the renal collecting system versus standard passive drainage at the end of RIRS. Ninety adult patients scheduled for RIRS will be randomized to the suction-induced collapse group or the standard drainage group at a single center. The primary outcome is immediate postoperative flank pain measured by the Numerical Rating Scale in the recovery room, with secondary outcomes including pain on postoperative day 1, infectious complications within 7 days, and total analgesic use. The technique is intended to reduce retained irrigation fluid and intrarenal pressure with a simple intraoperative modification performed before leaving the operating room.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Patients aged 20 to 80 years.
* Patients diagnosed with kidney stones and scheduled for retrograde intrarenal surgery (RIRS).
* Patients who have voluntarily signed the written informed consent form

Exclusion Criteria:

* Participation in another clinical trial (drug or device) within 1 month prior to enrollment.
* Congenital abnormalities of the urinary or reproductive system.
* Presence of a pre-placed ureteral stent (pre-stenting) at the time of surgery.
* Solitary kidney.
* Uncontrolled urinary tract infection.
* History of ureteral reconstruction on the affected side.
* Pregnancy.
* Uncorrectable bleeding diathesis or ongoing therapeutic anticoagulation therapy.
* Contraindications to general anesthesia.
* Other conditions that the investigator deems inappropriate for participation in the study.

Where it's running

• Kangdong Sacred Heart Hospital
  Gandong-gu, Outside U.S./Canada, South Korea Recruiting

Study contacts

• Principal investigator: Han Kyu Chae, M.D., Ph.D. — Department of Urology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine
• Study coordinator: Han Kyu Chae, M.D., Ph.D.
• Email: hanqsinopoli@gmail.com
• Phone: +821091869125

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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• Shock wave treatment versus flexible ureteroscopy for a single 1–2 cm kidney stone

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• Investigating oxalate production in patients with calcium oxalate kidney stones

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• Suction vs Conventional Ureteral Access Sheaths in Kidney Stone Surgery

  This study tests whether using a suction ureteral access sheath during RIRS helps adults clear stones more often and potentially reduces operative time and infections compared with a conventional sheath.

  Recruiting Antalya Health Sciences University · Antalya, Muratpasa · NCT07866209

How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.