Criteria for DJ Stent Omission Following Retrograde Intrarenal Surgery Using Flexible and Navigable Suction Sheath: A Prospective Cohort Study

NCT07826169 | Completed DMC

• 1 other identifier: FMASU MS 144/2026
• Study Type: observational
• Target: 140
• Locations: 1 country
• Sites: 1

Brief Summary

Retrograde intrarenal surgery is widely used for the treatment of upper urinary tract stones. Traditionally, ureteral stents are placed postoperatively to prevent complications such as pain and stone obstruction. On the other hand, it leads to patient discomfort and additional procedures or readmission .This study aims to evaluate whether routine postoperative DJ stenting can be safely omitted following RIRS in appropriately selected patients, without increasing postoperative complications or the need for additional interventions.

Conditions

Renal Stones; Flexible Ureteroscopy

Outcome Measures

Primary Outcomes (1)

• Need for readmission for increased body temperature

  one month

Study Arms (1)

patients who underwent flexible ureteroscopy without DJ application

Procedure: flexible ureteroscopy using flexible and navigable suction sheath

Interventions

flexible ureteroscopy using flexible and navigable suction sheath PROCEDURE

This study evaluates the safety of omitting routine postoperative DJ stenting after RIRS in uncomplicated cases, while reserving stenting for patients with predefined risk factors such as ureteric injury or significant residual stones. This selective approach aims to reduce stent-related discomfort and unnecessary procedures without increasing postoperative complications.

patients who underwent flexible ureteroscopy without DJ application

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

All patients above the age of 18 years of either sex who presented to the Urology clinic in our university hospitals with upper urinary tract stones with size up to 2.5 cm for flexible ureteroscopy.

You may qualify if:

• All patients above the age of 18 years of either sex who presented to the Urology clinic in our university hospitals with upper urinary tract stones with size up to 2.5 cm.

You may not qualify if:

• Previous open renal surgery
• patients with previous renal trauma
• Patients with renal anomalies
• Patients with untreated or active Urinary tract infection
• patients with Solitary kidney
• patients with renal insufficiency

Sponsors & Collaborators

• Ain Shams University: lead

Study Sites (1)

Ain Shams University Hospital

Cairo, Cairo Governorate, 11566, Egypt

Location

MeSH Terms

Conditions

Nephrolithiasis

Condition Hierarchy (Ancestors)

Kidney Diseases; Urologic Diseases; Female Urogenital Diseases; Female Urogenital Diseases and Pregnancy Complications; Urogenital Diseases; Urolithiasis; Male Urogenital Diseases

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Target Duration: 1 Month
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 13, 2026
• First Posted: September 17, 2026
• Study Start: July 1, 2025
• Primary Completion: April 1, 2026
• Study Completion: July 1, 2026
• Last Updated: September 17, 2026

Record last verified: 2025-07

Data Sharing

• IPD Sharing: Will share

Locations

EG (1)