New suction tools battle for best way to bust big kidney stones
NCT ID NCT07559214
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This trial will compare two techniques for removing kidney stones larger than 2 cm: a flexible suction sheath (FANS) and direct suction through the scope (DISS). About 100 adults will be randomly assigned to one method. The study will measure surgery time, how completely stones are removed, complications, and fluid use.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Flexible and Navigable Access Sheath (FANS) and Direct In-Scope Suction (DISS) procedures
- What this could lead to
- If one method proves faster and safer, it could become the preferred technique for removing large kidney stones, reducing surgery time and complications.
- What could go wrong
- This is a small, early-stage trial that has not yet started recruiting. The results may not apply to all patients, and both procedures carry standard surgical risks like infection or injury.
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
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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
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Jun 2026
An estimate. Start dates often move.
- Expected to finish
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Sep 2027
An estimate. End dates often move.
- Lead sponsor
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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
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18 to 60 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide 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: * All patients \< 18 years old presented with renal stone \> 2cm whatever the site of the stone (pelvic or calyceal) Exclusion Criteria: * Inaccessibility to introduce access sheath or FURS * Previous Inserted JJ stent * Active UTI * Patients refuse to participate in the protocol
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
The full official record for this study. This one lists no contact details, but it is the first place any would appear.
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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.
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- Stent before surgery: a new test for kidney stone treatment
- Which procedure wins for kidney stones in oddly shaped kidneys?
- Could a simple breathing change make kidney stone surgery easier?
- Holding breath during kidney stone surgery may speed up treatment