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Sound waves could push kidney stones out without surgery

NCT ID NCT02028559

Symptom relief Sponsor: University of Washington 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests a device that uses focused ultrasound to gently push kidney stones, helping them pass or relieving pain. Researchers are enrolling 172 people with kidney stones, including those waiting for treatment or recently treated. The goal is to see if the ultrasound can move stones and reduce symptoms.

What this could mean

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

Active substance
focused ultrasound (ultrasonic propulsion device)
What this could lead to
If successful, this could offer a non-invasive way to help kidney stones pass more easily, reducing pain and the need for surgery.
What could go wrong
This is an early-stage study focused on feasibility, not a proven treatment. The ultrasound may not move all stones, and some participants might still need other procedures.

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

172 people

The number who actually took part.

Started

Dec 2013

Expected to finish

May 2026

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: * Individuals suspected of having at least one kidney stone. This includes: * Patients who are being managed with watchful waiting or medical therapy * Patients who recently (but \> 4 weeks) underwent lithotripsy treatment of their stones * Patients scheduled for lithotripsy treatment Or * Individuals suspected of having an obstructed stone. This includes: * Patients presenting with renal colic * Patients presenting with hydronephrosis or dilation of the ureter Primary Exclusion Criteria for all groups: * Individuals under 18 years of age * Individuals with non-echogenic stones * Individuals unable or unwilling to comply with the follow-up requirements * Individuals with a coagulation abnormality or taking blood thinners or other anticoagulant at clinically significant levels * Individuals with mobility issues who are unable to comfortably lie for up to 30 minutes or roll from their back to their side * Individuals belonging to a vulnerable group (pregnant, mentally disabled, physically disabled, prisoner, etc.) * Individuals who have already received four previous ultrasonic propulsion procedures. * Individuals who have received an ultrasonic propulsion treatment within the last 4 weeks. Additional Exclusion Criteria for Obstructing Stone population * Individuals with a suspicion of kidney infection or exhibiting signs of sepsis * Individuals whom the treating physician considers to be at high risk for serious alternate diagnoses such as acute infectious etiologies (e.g. cholecystitis, appendicitis), aortic aneurysm and rupture, or bowel disorders. * Individuals who have undergone renal transplant, or individuals who will undergo dialysis. * Individuals with bilateral hydronephrosis * Individuals with a single kidney * Individuals who have already received an ultrasonic propulsion investigative treatment for the same obstructing stone

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Conditions

The condition(s) this trial relates to.

Calculi 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

  • University of Washington Department of Urology

    Seattle, Washington, 98195, United States

  • VA Puget Sound Health Care System

    Seattle, Washington, 98108, United States

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