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New kidney stone surgery aims for cleaner removal

NCT ID NCT07172373

Disease control Sponsor: Tianjin Medical University Second Hospital 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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 26, 2026 · Updated 2 times

Summary

This study compares a new surgical technique, antegrade flexible ureteroscopy-assisted PCNL, to standard PCNL for removing large, branching kidney stones (staghorn calculi). The goal is to see if the new method removes more stone fragments and causes fewer complications. The trial will enroll 420 adults across multiple centers, randomly assigning them to one of the two procedures.

What this could mean

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

Active substance
antegrade flexible ureteroscopy-assisted PCNL (surgical procedure)
What this could lead to
If successful, this could offer a more effective and safer surgical option for removing large, branching kidney stones, potentially reducing the need for repeat procedures.
What could go wrong
This is a surgical technique study, not a new drug. The benefit may be modest, and surgery always carries risks like bleeding or infection. Results may not apply to all patients.

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 420 people

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

Expected to start

Oct 2025

An estimate. Start dates often move.

Expected to finish

Apr 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: Staghorn calculi confirmed by non-contrast CT of the urinary system; Age ≥18 years; General condition suitable for surgical treatment; Ability to understand and voluntarily sign the informed consent form. Exclusion Criteria: Solitary kidney or congenital anomalies (such as horseshoe kidney or ectopic kidney); Patients with severe preoperative pyelonephritis; Patients with psychiatric disorders or unwilling to cooperate; Patients with uncontrolled diabetes or hypertension who cannot tolerate surgery; Patients with coagulation disorders; Patients deemed unsuitable for participation in this trial by the investigator.

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Conditions

The condition(s) this trial relates to.

nephrolithiasis Staghorn Calculi urolithiasis

As listed by the trial registrant

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

Renal stones Urolithiasis

How to take part

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

  1. 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 ↗

  2. 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.

More trials for these conditions

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