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6.3Fr Versus 7.5Fr Mini-Flexible Ureteroscopy for Renal Stones (MINI-FURS)

NCT07798336 · Status: NOT_YET_RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 308

Last updated 2026-09-01

No results posted yet for this study

Summary

This prospective, randomized, single-blinded, non-inferiority clinical trial will compare the clinical outcomes and cost-effectiveness of two mini-flexible ureteroscopes (6.3Fr and 7.5Fr) used during flexible ureteroscopy for the treatment of renal stones. Adult patients with renal stones up to 15 mm who are scheduled to undergo flexible ureteroscopy will be randomly assigned to one of the two study groups. The primary objectives are to compare stone-free rates and the ability to achieve primary renal access without preoperative ureteral stenting. Secondary outcomes include operative time, fluoroscopy use, ureteral trauma, postoperative stenting, pain, complications, emergency department visits, need for additional procedures, hospital stay, and cost-effectiveness. The results of this study are expected to provide high-quality evidence to guide the selection of mini-flexible ureteroscopes and improve the quality, safety, and value of surgical care for patients with kidney stones.

Conditions

  • Kidney Stones
  • Nephrolithiasis
  • Renal Calculi

Interventions

DEVICE

6.3Fr Mini-Flexible Ureteroscope

Use of a disposable 6.3Fr mini-flexible ureteroscope during flexible ureteroscopy for renal stone treatment

DEVICE

7.5Fr Mini-Flexible Ureteroscope

Use of a disposable 7.5Fr mini-flexible ureteroscope during flexible ureteroscopy for renal stone treatment

Sponsors & Collaborators

  • Sault Area Hospital

    lead OTHER

Principal Investigators

  • Yasser A Noureldin, MD, PhD · Urologist, Sault Area Hospital, Sault Ste. Marie, ON, Canada, and Assistant Professor of Urology, Northern Ontario School of Medicine University, ON, Canada

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-10-01
Primary Completion
2028-02-29
Completion
2028-08-31

Countries

  • Canada

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07798336 on ClinicalTrials.gov