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Kidney stone surgery showdown: one quick stretch vs. several small stretches

NCT ID NCT07279389

Knowledge-focused Sponsor: Ain Shams University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study compared two methods of widening the kidney passage during surgery to remove large kidney stones. One method uses a single, quick stretch (one-shot dilatation), while the other uses several gradual stretches (serial dilatation). Researchers looked at 60 adults to see which technique is safer, faster, and leads to fewer complications.

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 one technique proves faster or safer, it could become the preferred method for kidney stone surgery, reducing surgery time and hospital stays.
What could go wrong
This is a small, completed study with only 60 participants, so results may not apply to all patients. It compares existing techniques, not a new breakthrough.

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

60 people

The number who actually took part.

Started

Feb 2022

Finished

Aug 2023

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 to 70 years

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: * Patients aged between 18 and 70 years. * Patients with renal stones which their size in maximum diameter is more than 2cm and indicated for percutaneous nephrolithotomy. * Patients clinically fit for surgery. * Patients with normal anatomy of urinary tract. * Patients able to understand the procedure and accept to sign the informed consent. Exclusion Criteria: * Patients aged below 18 or above 70 years. * Patients with renal stones which their size in maximum diameter is less than 2cm or contraindicated for endoscopic management. * Patients with urinary tract infection, abnormal coagulopathy state or clinically unfit for surgery. * Patients with nephrostomy tube in situ. * Patients with more than single access tract. * Patients undergoing simultaneous bilateral stone procedures. * Patients with urinary tract abnormalities or history of renal transplantation. * Renal insufficiency with serum creatinine above 3.0mg/dL * Patients unable to understand the procedure or refuse to sign the informed consent.

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Conditions

The condition(s) this trial relates to.

nephrolithiasis

As listed by the trial registrant

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

Percutaneous nephrolithotomy (PCNL) Renal stone disease

Contacts and locations

Locations

  • Ain Shams University

    Cairo, Cairo Governorate, 11865, Egypt

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