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Which kidney stone surgery leaves you Stone-Free?

NCT ID NCT07072598

Symptom relief Sponsor: Northwestern 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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Aug 21, 2026 · Updated 2 times

Summary

This study compares two common surgeries for removing kidney stones: mini-PCNL (a small incision in the back) and flexible ureteroscopy with a special suction tube. About 80 adults with kidney stones between 1 and 3 cm will be randomly assigned to one procedure. The main goal is to see which method leaves fewer stone pieces behind, based on a CT scan after surgery.

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.

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

Dec 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 or older * Have a CT scan showing renal stones 1-3cm in length * Patients who will be able to read, understand, and complete patient questionnaires Exclusion Criteria: * Pregnant individuals * Those with anomalous renal anatomy * Patients with a urinary diversion (ex: Ileal conduit, reservoir, bladder substitute, etc.) * Any condition rendering patient medically unfit to undergo either procedure (Bleeding diasthesis) * Patients who lack decisional capacity * Patients who are non-english speakers\* * Non-recruitment of non-english speakers is due to the study being a small pilot study that is used to assess the stone free rate for patients treated with a ureteroscopy or mini-PCNL using ClearPETRA suction access sheaths in a small portion of our patient population seeking treatment for stones. The team also does not possess the bandwidth or personnel to consent patients who are non-English speaking.

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Conditions

The condition(s) this trial relates to.

Kidney Calculi nephrolithiasis urolithiasis

As listed by the trial registrant

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

Kidney stones Nephrolithiasis Urolithiasis

Contacts and locations

Locations

  • Northwestern Memorial Hospital

    Chicago, Illinois, 60611, United States

More trials for these conditions

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