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Which drain first? trial tests best emergency move for blocked kidney

NCT ID NCT07627880

Disease control Sponsor: Beni-Suef University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at people with a sudden kidney blockage from a stone in their only working kidney. Doctors will randomly use either a tube placed through the bladder or one through the back to drain urine. The goal is to see which method helps kidney function recover better and makes later stone removal surgery more successful.

What this could mean

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

Active substance
JJ ureteral stent or percutaneous nephrostomy tube
What this could lead to
If this trial succeeds, it could show which emergency drainage method better preserves kidney function and improves stone removal success.
What could go wrong
This is a small, early-stage trial with only 90 participants, so results may not apply to everyone. Both drainage methods carry risks like infection or bleeding.

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 90 people

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

Started

May 2026

Expected to finish

Apr 2027

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: * Adults aged 18 years or older. * Calculous anuria secondary to a single upper ureteral stone. * Solitary functioning kidney, whether anatomical or functional. * Single upper ureteral stone confirmed by non-contrast computed tomography. * Stone size from 6 mm to 20 mm in maximum diameter. * Patient considered suitable for either initial JJ ureteral stent drainage or percutaneous nephrostomy drainage. * Candidate for definitive treatment by flexible ureteroscopy/retrograde intrarenal surgery. * Documented renal functional improvement and clinical stabilization before definitive RIRS. * Negative or appropriately treated urine culture before definitive RIRS. * Ability and willingness to provide written informed consent. Exclusion Criteria: * Multiple stones or bilateral stones not fitting the solitary-kidney study design. * Renal pelvic, distal ureteral, or multiple ipsilateral stones. * Stone burden greater than 20 mm. * Septic shock, hemodynamic instability, or need for emergency dialysis at presentation. * Pyonephrosis requiring a non-randomized drainage decision. * Anatomical abnormalities affecting endoscopic access, such as horseshoe kidney, pelvic kidney, ureterocele, or ureteral stricture. * Previous ipsilateral ureteral reconstructive surgery. * Uncorrected coagulopathy. * Pregnancy. * Genitourinary malignancy. * Inability to complete follow-up.

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Conditions

The condition(s) this trial relates to.

acute kidney injury ureteral obstruction ureterolithiasis urinary tract obstruction

As listed by the trial registrant

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

Acute kidney injury Calculous anuria Obstructive uropathy Upper ureteral stone

How to take part

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

  1. The places running it

    3 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

  • Department of Urology- Beni-Suef University Hospitals

    RECRUITING

    Banī Suwayf, Beni Suweif Governorate, Egypt

  • Department of Urology- Minia University Hospitals

    RECRUITING

    Minya, Minya Governorate, Egypt

  • Department of Urology- Tanta University Hospitals

    RECRUITING

    Tanta, Egypt

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