Less invasive kidney stone surgery may match standard approach
NCT ID NCT06507176
First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study compared two surgical methods for removing kidney stones between 2 and 4 centimeters: flexible ureteroscopy (a less invasive scope through the urinary tract) and percutaneous nephrolithotomy (a small incision in the back). The goal was to see if the less invasive option works as well at clearing stones. The trial planned to include 224 adults aged 18-70, but it was terminated early, so the full results are not available.
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 successful, this could show that the less invasive ureteroscopy works as well as standard surgery for medium-to-large kidney stones, giving patients a safer option.
- What could go wrong
- The trial was terminated early, so results may be incomplete. Both procedures carry risks like infection or bleeding, and individual outcomes vary.
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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224 people
The number who actually took part.
- Started
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Jul 2024
- Finished
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Apr 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 70 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: 1. The patient agrees to participate in the experiment and signs the informed consent, including compliance with the requirements of the experiment 2. American Society of Anesthesiologists (ASA) score of 1-2, tolerate surgery 3. Age 18-70 years old 4. Diagnosed with renal stones via CT scan, with the largest diameter of the stone being 2-4 cm. Exclusion Criteria: 1. Excessive obesity, BMI \> 28 2. Severe urinary tract infection not corrected 3. Previous history of kidney transplantation or urinary tract diversion surgery 4. Uncorrected bleeding or patients with coagulation dysfunction 5. Urinary system congenital malformations, such as polycystic kidney, horseshoe kidney, pelvic ectopic kidney, etc 6. Combined with serious heart and lung dysfunction and failure of important organs and cannot tolerate anesthesia or surgery
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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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Yanbowang
Ch’ang-ch’un, Jilin, 130000, China
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