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Small study compares standard vs mini kidney stone surgery

NCT ID NCT04069013

Knowledge-focused Sponsor: The Cleveland Clinic 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This completed trial compared two surgical procedures for removing kidney stones: standard PCNL and mini-PCNL. The study enrolled 18 adults with stones 10-20mm and measured blood loss, complications, and recovery time. The goal was to see if the smaller incision approach offers any advantages.

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 procedure proves safer or faster, it could become the preferred surgical option for kidney stones.
What could go wrong
This was a very small trial (18 people) and only compared two surgical techniques, not a new treatment. 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

18 people

The number who actually took part.

Started

May 2022

Finished

Nov 2025

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: * Patients planned for PCNL at participating institutions * Age ≥ 18 years old * Male and female patients * Patients of all ethnic backgrounds * Stone size 10-20mm Patients must be capable of giving informed consent and must be capable and willing to enroll and participate fully with the study. Exclusion Criteria: * Conversion to open procedure * Multiple access tracts * Anticoagulated or history of coagulopathy * Preoperative ureteral stent or nephrostomy tube placement * Technical problems/impossibility of localizing the stone on the day of intervention Patients unable to give informed consent or unwilling to enroll or participate in the study will be excluded.

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Conditions

The condition(s) this trial relates to.

Kidney Calculi kidney disorder nephrolithiasis Ureteral Calculi ureterolithiasis urolithiasis

As listed by the trial registrant

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

Kidney calculi Kidney diseases Kidney stone Ureteral calculi Urolithiasis

Contacts and locations

Locations

  • Cleveland Clinic Foundation

    Cleveland, Ohio, 44195, United States

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