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Kidney stone patients may skip stent after surgery, study hints

NCT ID NCT03855787

Knowledge-focused Sponsor: Vanderbilt University Medical Center 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at whether placing a ureteral stent after ureteroscopy for kidney stones reduces complications. 103 adults with small kidney stones were randomly assigned to get a stent or not. Researchers tracked ER visits, unplanned doctor visits, and hospitalizations to see if stenting made a difference.

What this could mean

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

What this could lead to
If successful, this could help doctors decide whether to place a stent after kidney stone surgery, potentially reducing unnecessary procedures and complications.
What could go wrong
This is a small, completed study with 103 participants. Results may not apply to all patients, and the findings are about comparing outcomes, not testing a new treatment.

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

103 people

The number who actually took part.

Started

Nov 2019

Finished

Mar 2026

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: * nonobstructing renal stone 1.5cm total stone diameter (if multiple stones, then sum of maximum diameters) or less undergoing ureteroscopy Exclusion Criteria: * age \< 18 years * pregnancy status * ureteral stone * preoperative hydronephrosis * indwelling nephrostomy tube * planning bilateral ureteroscopy or subsequent staged ureteroscopy * solitary kidney or eGFR \<60 mL/min (CKD stage 3 or greater) * variant anatomy including horseshoe kidney, pelvic kidney, prior urinary tract reconstruction

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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 calculi

Contacts and locations

Locations

  • Brigham and Women's Hospital

    Boston, Massachusetts, 02130, United States

  • Indiana University Health Physicians Urology

    Indianapolis, Indiana, 46202, United States

  • University of California Davis

    Sacramento, California, 95817, United States

  • University of California Los Angeles

    Los Angeles, California, 90095, United States

  • University of California San Diego

    San Diego, California, 92121, United States

  • University of Montreal

    Montreal, Canada

  • Vanderbilt University Medical Center

    Nashville, Tennessee, 37232, United States

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