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Kidney stone patients may ditch painful stent, new study hopes

NCT ID NCT05866081

Symptom relief Sponsor: University of Michigan Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 looks at whether it is safe and less painful to skip placing a temporary tube (stent) after routine kidney stone removal. About 792 adults with small stones will either get a stent or not, and researchers will track pain and any unplanned doctor visits. The goal is to see if omitting the stent leads to a better recovery without increasing complications.

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 792 people

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

Started

Jun 2023

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: * Undergoing unilateral ureteroscopy and lithotripsy for stone disease (participants may have contralateral stones, as long as these are asymptomatic and not being treated concurrently) * Largest stone less or equal to 10 millimeter in size as measured on abdominal x-ray, ultrasound, or computed tomography scan * Access to means of communication with the study team (email, text messaging, and/or telephone) * Adequate independent cognitive function and English language proficiency to complete study surveys * Written informed consent Exclusion Criteria: * Planned bilateral ureteroscopy * Indwelling ureteral stent or percutaneous nephrostomy tube preoperatively in either kidney * Anatomic abnormalities of the ipsilateral upper urinary tract (for example, horseshoe kidney, crossed fused ectopia, pelvic kidney, urinary diversion) * Anatomic or functional solitary kidney * Planned secondary or staged ureteroscopy * Planned use of ureteral access sheath * Pregnancy * Patients who use opiate medication daily for greater than 3 months to manage a painful condition Second Stage Exclusion Criteria: * ureteral perforation * unanticipated anatomic abnormality * greater than expected bleeding * ureteral dilation greater than 12 French * ureteral access sheath utilized * failed ureteroscopy * no or incomplete lithotripsy performed * unable to complete case due to medical or anesthetic event.

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Conditions

The condition(s) this trial relates to.

Kidney Calculi nephrolithiasis ureterolithiasis

As listed by the trial registrant

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

Stone ureter Stone, kidney

How to take part

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

  1. The places running it

    16 sites. 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

  • Cadillac Munson Hospital

    RECRUITING

    Cadillac, Michigan, 49601, United States

  • Corewell Health Buttersworth Hospital

    RECRUITING

    Grand Rapids, Michigan, 49503, United States

  • E.W Sparrow Hospital

    RECRUITING

    Lansing, Michigan, 48912, United States

  • Henry Ford Health System

    RECRUITING

    Detroit, Michigan, 48202, United States

  • Indiana University Department of Urology

    RECRUITING

    Indianapolis, Indiana, 46202, United States

  • Michigan Institute of Urology Town Center Ambulatory Surgery Center

    RECRUITING

    Troy, Michigan, 48084, United States

  • Monte Fiore

    RECRUITING

    Brooklyn, New York, 10467, United States

  • Mount Sinai

    RECRUITING

    New York, New York, 10029, United States

  • MyMichigan Medical Center Midland

    RECRUITING

    Midland, Michigan, 48670, United States

  • St. Joseph Health System Chelsea Hospital

    RECRUITING

    Chelsea, Michigan, 48118, United States

  • St. Joseph Mercy Health (Trinity)

    RECRUITING

    Chelsea, Michigan, 48118, United States

  • UF Health Shands Hospital

    RECRUITING

    Gainesville, Florida, 32608, United States

  • UNC Hospital

    RECRUITING

    Chapel Hill, North Carolina, 27514, United States

  • University of Arizona

    RECRUITING

    Tucson, Arizona, 85724, United States

  • University of Michigan Health System

    RECRUITING

    Ann Arbor, Michigan, 48111, United States

  • University of Michigan Health System

    RECRUITING

    Brighton, Michigan, 48116, United States

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