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Can a thinner scope make kidney stone surgery easier and cheaper?

NCT ID NCT07798336

Disease control Sponsor: Sault Area Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Sep 01, 2026 · Last updated Sep 04, 2026 · Updated 2 times

Summary

This trial tests two disposable mini-flexible ureteroscopes, one thinner than the other, for removing kidney stones up to 15 mm. Researchers randomly assign adults to receive surgery with either the 6.3Fr or the 7.5Fr scope. They compare how completely stones are cleared, whether the scope can reach the kidney without a pre-surgery stent, and factors like surgery time, pain, complications, and cost. The goal is to see if the thinner scope works just as well while offering better value and comfort.

What this could mean

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

Active substance
Two types of disposable mini-flexible ureteroscopes: one 6.3Fr and one 7.5Fr
What this could lead to
If the thinner scope works as well, it could mean less need for pre-surgery stenting, shorter procedures, and lower costs for kidney stone care.
What could go wrong
This is a single-center trial, and the thinner scope might not clear stones as effectively or could cause more complications, which the study is designed to check.

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 308 people

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

Expected to start

Oct 2026

An estimate. Start dates often move.

Expected to finish

Aug 2028

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: \* Adults aged 18 years or older. * Scheduled to undergo flexible ureteroscopy for renal stones. * Renal stone size ≤15 mm in the greatest dimension. * No indwelling ureteral stent at the time of surgery. * Able and willing to provide written informed consent. Exclusion Criteria: \* Active urinary tract infection. * Anatomical abnormalities of the urinary tract (e.g., ureteral stricture, horseshoe kidney, ectopic kidney). * Solitary kidney. * Pregnancy. * Stones located within a calyceal diverticulum. * Any condition that, in the opinion of the investigator, would interfere with study participation or follow-up.

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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 stones Nephrolithiasis Renal calculi

How to take part

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  1. The places running it

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  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

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Contacts and locations

Locations

  • Sault Area Hospital

    Sault Ste. Marie, Ontario, P6B 0A8, Canada

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