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Which kidney stone technique leaves no stone behind?

NCT ID NCT07741084

Disease control Sponsor: Haukeland University Hospital 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 03, 2026 · Last updated Aug 04, 2026 · Updated 1 time

Summary

This trial compares three ways to remove kidney stones using a scope inserted through the urinary tract. Some patients will have the procedure without a protective sheath, while others will use a flexible sheath, with either low or high laser power. The goal is to see which approach clears the most stones completely, as confirmed by a CT scan three months later. The study also tracks surgery time, laser use, and any complications to find the safest and most effective method.

What this could mean

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

Active substance
Ureteroscopic lithotripsy using a sheathless approach or a flexible and navigable ureteral access sheath (FANS), with low or high power Thulium Fiber Laser settings.
What this could lead to
If successful, this could identify the most effective and safest way to remove kidney stones, potentially reducing the need for repeat procedures and improving patient outcomes.
What could go wrong
The trial is relatively small and compares surgical techniques, so results may vary by surgeon skill and patient anatomy. Complications like bleeding or infection are possible with any procedure.

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

About 225 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

Jun 2027

An estimate. End dates often move.

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: * Patients ≥ 18 years scheduled for URS lithotripsy for renal stones, 8-25 mm, at the day surgery unit at Haukeland University Hospital, Akershus University Hospital and The Hospital of Vestfold Exclusion Criteria: * Concomitant ureteral stone * Urinary diversion * Active infection * Untreated cancer in the upper urinary tract

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Conditions

The condition(s) this trial relates to.

nephrolithiasis

As listed by the trial registrant

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

Renal stones

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Haukeland University Hospital

    Bergen, Vestland, 5021, Norway

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