RecruitingNot ApplicableNCT07535281

Effect of Complete Suction-Induced Collapse of the Renal Collecting System at the End of RIRS on Early Postoperative Outcomes

Effect of Complete Suction-Induced Collapse of the Renal Collecting System at the End of Retrograde Intrarenal Surgery on Early Postoperative Outcomes: A Prospective Randomized Study

Sponsor

Kangdong Sacred Heart Hospital

Enrollment

90 participants

Start Date

Apr 20, 2026

Study Type

INTERVENTIONAL

Conditions

Kidney Stones Nephrolithiasis

Summary

The purpose of this study is to evaluate whether actively suctioning the renal collecting system to induce a "collapse" state at the end of retrograde intrarenal surgery (RIRS) can reduce postoperative pain and infection in patients with kidney stones. Participants will be randomly assigned to either the experimental group (suction-induced collapse) or the control group (standard drainage). The study aims to determine if this simple surgical modification can improve early recovery outcomes and patient satisfaction.

Eligibility

Min Age: 20 YearsMax Age: 80 Years

Inclusion Criteria3

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 Criteria10

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.

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Interventions

PROCEDUREComplete suction-induced collapse

At the end of Retrograde Intrarenal Surgery (RIRS), active suctioning is performed through a suction ureteral access sheath (UAS) until the renal collecting system is visually confirmed to be collapsed.

PROCEDUREStandard RIRS with natural drainage

Standard Retrograde Intrarenal Surgery (RIRS) procedure is performed. At the end of the surgery, only natural drainage is allowed after stopping irrigation, without any additional active suctioning.