Can a tiny cone trap escaping stone fragments and boost clearance?
NCT ID NCT07769450
First seen Aug 18, 2026 · Last updated Aug 19, 2026 · Updated 1 time
Summary
This trial tests whether using the Stone Cone device during ureteroscopic pneumatic lithotripsy improves stone clearance for people with proximal ureteral stones. The device is placed above the stone to block fragments from migrating back into the kidney during fragmentation. Researchers will compare stone-free rates at 48 hours, complication rates, operative time, and hospital stay between patients treated with and without the device.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Stone Cone anti-retropulsion device used during ureteroscopic pneumatic lithotripsy
- What this could lead to
- If effective, this device could become a standard tool to improve stone-free rates and reduce the need for additional procedures after ureteroscopic stone removal.
- What could go wrong
- This is a single-center trial with 100 participants, so results may not apply broadly. The device may not significantly improve clearance and could carry risks like ureteral injury 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
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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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100 people
The number who actually took part.
- Started
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Oct 2022
- Finished
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Jun 2026
- 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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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 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: * A solitary proximal ureteral stone ≤ 2 cm in size as confirmed by imaging. * Normal renal function. Exclusion Criteria: * Active urinary tract infection (clinical features or pyuria). * Bleeding disorder (abnormal prothrombin time or activated partial thromboplastin time). * Chronic kidney disease (raised urea and creatinine). * Stone \> 2 cm in size.
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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.
Contacts and locations
Locations
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Provincial Headquarter Teaching Hospital, Gilgit.
Gilgit, Gilgit-Baltistan, 54000, Pakistan
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