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New stent aims to make kidney stone recovery less painful

NCT ID NCT07627828

Symptom relief 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study compares a new type of ureteral stent (ComfiJ) with a standard Double-J stent in 150 adults who need a short-term stent after kidney stone surgery. The goal is to see if the ComfiJ stent causes fewer urinary symptoms, like pain or urgency, two weeks after surgery. Participants are randomly assigned to receive one of the two stents during their operation.

What this could mean

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

Active substance
ComfiJ ureteral stent
What this could lead to
If it works, this could lead to a more comfortable stent option for people undergoing kidney stone surgery, reducing pain and urinary symptoms.
What could go wrong
This is a relatively small, early-stage trial with 150 participants, so results may not apply to everyone. The new stent might not be significantly better than the standard one.

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 150 people

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

Started

May 2026

Expected to finish

May 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: * Age 18 to 80 years. * Adult patients undergoing unilateral ureteroscopy or retrograde intrarenal surgery for ureteric or renal stones. * Intraoperative confirmation that short-term postoperative ureteric stenting for approximately 2 weeks is clinically indicated. * Indications for postoperative stenting may include ureteric edema, minor ureteric mucosal trauma, need for ureteric dilatation, ureteral access sheath use with expected postoperative edema, impacted stone, residual dust or fragments requiring temporary drainage, or prolonged procedure. * Ability to understand and complete the Arabic Ureteral Stent Symptom Questionnaire. * Ability to provide written informed consent. Exclusion Criteria: * Cases in which no postoperative ureteric stent is clinically indicated. * Cases requiring prolonged urinary drainage or major reconstructive decision-making. * Bilateral ureteroscopy or retrograde intrarenal surgery. * Solitary kidney. * Major ureteric injury or ureteric perforation. * Preoperative febrile urinary tract infection or sepsis. * Pregnancy or breastfeeding. * Neurogenic bladder. * Overactive bladder syndrome. * Major neurological disease or psychiatric disease affecting symptom reporting. * History of major bladder, prostate, or pelvic surgery likely to confound stent-related symptoms. * Concomitant use of alpha-blockers, anticholinergics, chronic analgesics, or other medications likely to alter symptom evaluation. * Other acute medical conditions that might influence the Ureteral Stent Symptom Questionnaire pain score, including acute pancreatitis, acute gastroenteritis, or musculoskeletal disorders. * Known allergy to any study-related medication or device material. * Inability to comply with the follow-up schedule.

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Conditions

The condition(s) this trial relates to.

Ureteral Calculi ureterolithiasis urolithiasis

As listed by the trial registrant

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

Ureteral calculi Ureteral stent-related symptoms Urolithiasis

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, 02456, Egypt

  • Department of Urology- Minia University Hospitals

    RECRUITING

    Minya, Egypt

  • Department of Urology- Tanra University Hospitals

    RECRUITING

    Tanta, Egypt

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