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Flexible Ureteroscopy Versus Mini-Percutaneous Nephrolithotomy for Treatment of Renal Stones

NCT03932370 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 118

Last updated 2025-09-30

No results posted yet for this study

Summary

Management of nephrolithiasis is evolving rapidly, and various minimally-invasive urological procedures are currently available for treating patients with renal stones, including extracorporeal shockwave lithotripsy (ESWL), flexible ureteroscopy (f-URS) and miniaturised percutaneous nephrolithotomy (mini-PCNL).

Despite being the only truly-non-invasive, outpatient procedure, stone-free rates (SFRs) of ESWL are lower than both mini-PCNL and f-URS. Furthermore, ESWL has several limitations, such as pregnancy; uncorrected coagulopathy;aortic aneurism; severe obesity; large stone burdens (\>2cm); stones with high densities (\>970/1000 Hounsfield units); ESWL-resistant stone compositions; lower calyceal stones with unfavourable anatomical criteria; and stones in calyceal diverticula; Morbidities of the conventional PCNL are significantly minimised by using less access diameters in PCNL while providing comparable SFRs. Additionally, Mini and Micro PCNL result in shorter hospital stay and higher tubeless rates compared to conventional PCNL.

Flexible ureteroscopy has been increasingly used as a primary modality for treatment of renal stones with significantly lower complication rates than PCNL and mini-PCNL in terms of less bleeding and transfusion rates, shorter hospital stay and less postoperative pain. Additionally, f-URS is the only treatment modality of nephrolithiasis that can be safely and effectively used in patients with bleeding tendency, as well as pregnant women; moreover, its outcomes are not affected by obesity. Nevertheless, its poor durability and high costs remain major limitations for f-URS, especially in developing countries.

Conditions

  • Stone;Renal

Interventions

PROCEDURE

Flexible ureteroscopy

The procedure will be performed in an endourology room where a radiolucent operative table together with a C-arm, a video-camera unit and a Laser device are available. Irrigation fluids include normal saline and/or sterile water.

PROCEDURE

mini-Percutaneus nephrolithotomy

The procedure is done in the prone position under fluoroscopy guidance with a semi-rigid 12Fr. Nephroscope

Sponsors & Collaborators

  • Assiut University

    lead OTHER

Eligibility

Min Age
16 Years
Max Age
90 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2019-05-27
Primary Completion
2021-07-30
Completion
2021-12-27

Countries

  • Egypt

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 NCT03932370 on ClinicalTrials.gov