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Kidney stone surgery without the stent: a new study asks if It's safe

NCT ID NCT07826169

Symptom relief Sponsor: Ain Shams University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Sep 17, 2026 · Last updated Sep 18, 2026 · Updated 1 time

Summary

Doctors often place a ureteral stent after flexible surgery to remove kidney stones, but stents cause discomfort and may need a second procedure for removal. This study at Ain Shams University follows 140 adults with upper urinary tract stones up to 2.5 cm who have the surgery with a suction sheath. Researchers will check whether omitting the stent in selected patients leads to more readmissions for fever or other complications. The goal is to see if a more selective approach can reduce stent-related problems without raising risks.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
flexible ureteroscopy with a suction sheath, with or without a ureteral stent
What this could lead to
If it works, some patients could avoid the discomfort of a ureteral stent and the need for a second procedure to remove it.
What could go wrong
This is an observational study, not a randomized trial, so it cannot prove cause and effect. Skipping the stent might raise the risk of pain, blockage, or readmission in some patients.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

140 people

The number who actually took part.

Started

Jul 2025

Finished

Jul 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

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.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 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. Exclusion Criteria: * 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

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Conditions

The condition(s) this trial relates to.

nephrolithiasis urolithiasis

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Flexible ureteroscopy Renal stones

Contacts and locations

Locations

  • Ain Shams University Hospital

    Cairo, Cairo Governorate, 11566, Egypt

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