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Kidney stent reflux study pulled before enrolling anyone

NCT ID NCT06720740

Knowledge-focused Sponsor: University of California, San Diego 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study was designed to measure how often urine flows backward from the bladder into the ureter after placing a special stent (RELIEF) in people with kidney stones. Researchers planned to use bladder X-rays to check for reflux and track any symptoms. However, the study was withdrawn before any participants were enrolled, so no results are available.

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

Dec 2024

An estimate. Start dates often move.

Expected to finish

Dec 2025

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

Accepted

You do not need to have the condition being studied to take part.

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: * Has capacity to consent * Stated willingness to comply with all study procedures and availability for the duration of the study * Persons, 18 years of age or older * Male or female subjects with confirmed ureteral and/or renal stones or strictures documented via abdomen X-ray KUB (kidney ureter bladder) or CT (computed tomography) Exclusion Criteria: * Distal ureteral obstruction where suture portion of stent may be placed * Urinary reflux (assessed by pre-stent cystogram) * Pregnancy or lactation * Patients requiring bilateral surgical stone management procedure * Infected stones * Patients where 24cm or 26cm stent lengths are not suitable * Ureteral structure in distal third of ureter * Intraoperative exclusion: based on urologist's discretion, if trauma has been induced to the distal ureter due to ureteroscopy maneuvers, exclude these patients

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Conditions

The condition(s) this trial relates to.

Kidney Calculi nephrolithiasis stricture or kinking of ureter ureterolithiasis

As listed by the trial registrant

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

Kidney stone

More trials for these conditions

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