Renal StonesNCT07826169
Criteria for DJ Stent Omission Following Retrograde Intrarenal Surgery Using Flexible and Navigable Suction Sheath: A Prospective Cohort Study
An observational study of Renal Stones and Flexible Ureteroscopy, run by Ain Shams University at 1 site in Egypt.
Trial 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. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Renal Stones, Flexible Ureteroscopy
- What is being tested?
- flexible ureteroscopy using flexible and navigable suction sheath
- Type of treatment
- Surgery or procedure
- How many people
- 140 participants
- Where
- 1 siteEgypt
- Study dates
- 1 Jul 2025to 1 Jul 2026
- How long will I take part?
- 1 Month
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
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.
Who may be able to join
- 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.
Who cannot join
- 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
Trial locations and contacts
1 site in 1 country.
About this study
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
- Being tested
- flexible ureteroscopy using flexible and navigable suction sheath
- Medical subject headings
- Nephrolithiasis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
flexible ureteroscopy using flexible and navigable suction sheathProcedure or surgery
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.
| Study group | Role | What they receive |
|---|---|---|
| patients who underwent flexible ureteroscopy without DJ application | Not described Receives: Procedure: flexible ureteroscopy using flexible and navigable suction sheath |
What is being measured
The primary outcome is the main question the study is designed to answer.
Need for readmission for increased body temperature
Measured: one month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Sep 2026
- Study start1 Jul 2025
- Primary completion1 Apr 2026
- Study completion1 Jul 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Renal StonesStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 140 participants (actual)
- Target duration
- 1 Month
Sponsor and investigators
- Lead sponsor
- Ain Shams University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07826169
- Sponsor's protocol ID
- FMASU MS 144/2026
- Status last verified
- Jul 2025
- First submitted
- 13 Sep 2026
- Last updated
- 17 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- Individual data sharing
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 17 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Criteria for DJ Stent Omission Following Retrograde Intrarenal Surgery Using Flexible and Navigable Suction Sheath: A Prospective Cohort Study
- ClinicalTrials.gov ID
- NCT07826169
- Acronym / sponsor ID
- FMASU MS 144/2026
- Conditions
- Renal Stones, Flexible Ureteroscopy
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 140 participants (actual)
- Lead sponsor
- Ain Shams UniversityUniversity, hospital or other
- Study start
- 1 Jul 2025 (actual)
- Primary completion
- 1 Apr 2026 (actual)
- Study completion
- 1 Jul 2026 (actual)
- First posted
- 17 Sep 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Target follow-up
- 1 Month
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| patients who underwent flexible ureteroscopy without DJ application | – | Procedure: flexible ureteroscopy using flexible and navigable suction sheath |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- 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.
Key inclusion criteria (1 listed)
- 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.
Key exclusion criteria (6 listed)
- 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
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| flexible ureteroscopy using flexible and navigable suction sheathThis 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. | Procedure or surgery | patients who underwent flexible ureteroscopy without DJ application |
Primary outcome
Need for readmission for increased body temperature
Time frame: one month
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Sep 2026.
- Individual participant dataSharing planned: Yes
Related trials for Renal Stones
Recruiting
Randomized Controlled Trial of Miniaturized Percutaneous Nephrolithotomy With Vacuum-Assisted Access Sheaths Versus Conventional Sheaths for Treatment of Nephrolithiasis
Kidney Stone
RecruitingPhase 3
Trial to Assess the Efficacy of EMPAgliflozin and Personalized Dietary Counseling for Kidney STONE Prevention
Kidney Stone, Nephrolithiasis
Not yet recruiting
DISS vs FANS in Suction-Assisted RIRS for Medium-Sized Renal Stones
Kidney Stones, Nephrolithiasis
Not yet recruitingObservational study
Novel Antimicrobial Solution to Prevent Infections
Kidney Stone, Infection
RecruitingObservational study
Perioperative Parameter and Treatment Outcomes of ECIRS in Asia
Renal Stone
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Renal Stones and Flexible Ureteroscopy, run by Ain Shams University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 17 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Need for readmission for increased body temperature (time frame: one month). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Sep 2026; AzTrials last refreshed its copy on 26 Oct 2026.