Vacuum-assisted vs conventional ureteral access sheath in modern kidney stone 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 interventional study compares two ureteral access sheath designs used during retrograde intrarenal surgery (RIRS) for upper urinary tract stones. It evaluates whether vacuum-assisted sheaths achieve higher stone-free rates and fewer complications than conventional non-vacuum sheaths. The study uses adults aged 18–85 undergoing RIRS with 11–13 Fr UAS, and assesses efficacy, safety, and intraoperative factors such as visualization and operative time. The trial builds on existing guidelines that support UAS use for better imaging and reduced intrarenal pressure, while exploring whether vacuum-assisted designs offer additional benefits. Primary outcomes include stone-free rate; secondary outcomes include complication rates and procedure-related metrics.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Patients over 18 years of age
* Patients below 85 years of age
* Patients with 11-13 FR conventional/vacuum-assisted ureteral access sheath (UAS) during retrograde intrarenal surgery

Exclusion Criteria:

* Patients with non-sterile preoperative urine culture
* Patients with renal anatomic anomalies
* Patients with a solitary (single) kidney
* Patients with insufficient data
* Patients under the age of 18, above the age of 85
* Patients without an UAS during RIRS
* Patients without 11-13Fr UAS during RIRS

Where it's running

• Tekirdag Namık Kemal University
  Tekirdağ, Turkey, Turkey (Türkiye) Recruiting

Study contacts

• Study coordinator: Mehmet F. Şahin, Ass. Professor
• Email: mfatihsahin@gmail.com
• Phone: +905555511871

Similar studies

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

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• Gentamicin Irrigation and Suction Ureteral Access in Kidney Stone Surgery

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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.