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X-ray-free kidney stone surgery put to the test in 500-patient trial

NCT ID NCT05269108

Disease control Sponsor: Al-Azhar 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jul 30, 2026 · Last updated Aug 14, 2026 · Updated 4 times

Summary

This trial tests whether a common kidney stone procedure called retrograde intrarenal surgery (RIRS) can be performed safely and effectively without using X-ray guidance. Instead, surgeons rely on direct visualization through a tiny camera. The goal is to reduce radiation exposure for both patients and medical staff. The study includes adults with kidney stones at least 10 mm in size and compares stone clearance and complication rates between the standard X-ray-guided approach and the X-ray-free technique.

What this could mean

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

Active substance
a surgical procedure for kidney stones performed under direct visualization without X-ray guidance
What this could lead to
If successful, this technique could eliminate radiation exposure during kidney stone surgery for both patients and surgeons.
What could go wrong
The trial is testing whether skipping X-ray guidance is as safe and effective as the standard approach; there may be a higher risk of complications or incomplete stone removal.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

503 people

The number who actually took part.

Started

Feb 2022

Finished

Apr 2024

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.

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: * Renal stone. * Stone size: ≥10 mm. Exclusion Criteria: * Partial and complete staghorn stones. * Pregnant women. * Morbid obesity. * Uncorrectable coagulation disorders. * Active urinary tract infection (UTI). * Stone in a calyceal diverticulum. * Urinary tract obstruction distal to the stone. * Concomitant pathology that needs intervention in the same setting.

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Conditions

The condition(s) this trial relates to.

Kidney Calculi nephrolithiasis

As listed by the trial registrant

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

Kidney calculi Radiation exposure Retrograde intrarenal surgery

Contacts and locations

Locations

  • Department of Urology, Al-Azhar University hospitals

    Cairo, Egypt

More trials for these conditions

Other studies related to the condition(s) this trial covers.