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Comparing ClearPETRA Sheath for Kidney Stone Treatment

This study is comparing two common procedures for kidney stones (nephrolithiasis, urolithiasis) using a special device called the ClearPETRA suction access sheath. The two procedures are ureteroscopy and mini-PCNL (percutaneous nephrolithotomy). Researchers want to see if using the ClearPETRA sheath helps clear stones better in both procedures. You might be able to join if you are 18 or older, have kidney stones between 1 and 3 centimeters shown on a CT scan, and can complete questionnaires. You cannot join if you are pregnant, have unusual kidney anatomy, or have had a urinary diversion. The main goal is to see how many people are completely stone-free four weeks after their procedure. This study plans to enroll 80 participants.

Study design
This interventional study plans to enroll 80 participants to compare two different procedures for kidney stones using the ClearPETRA suction access sheath.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Participants will be followed to measure their stone-free rate at 4 weeks post-procedure.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07072598

Comparing Efficiency and Stone-Free Rates Mini PCNL vs Flex URS

Withdrawn
NAAges 18+InterventionalTreatment
Northwestern University
Updated 2026-08-20 on ClinicalTrials.gov
What's tested:ClearPETRA suction access sheath

At a glance

Recruiting sites
0 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Stone free rate
Measured over 4 weeks post-procedure

Conditions

Kidney Stones
Nephrolithiasis
Urolithiasis

Explore related trials

Nephrolithiasis

Where it's being run

1 sites across 1 states
Illinois1

Study leadership

  • Amy E Krambeck, MD · PRINCIPAL_INVESTIGATOR · Northwestern University

Who to contact

This trial hasn't published a contact. View it on ClinicalTrials.gov

Do you actually qualify for this trial?

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Eligibility criteria

Inclusion

Patients 18 years or older
Have a CT scan showing renal stones 1-3cm in length
Patients who will be able to read, understand, and complete patient questionnaires

Exclusion

Pregnant individuals
Those with anomalous renal anatomy
Patients with a urinary diversion (ex: Ileal conduit, reservoir, bladder substitute, etc.)
Any condition rendering patient medically unfit to undergo either procedure (Bleeding diasthesis)
Patients who lack decisional capacity
Patients who are non-english speakers\*
Non-recruitment of non-english speakers is due to the study being a small pilot study that is used to assess the stone free rate for patients treated with a ureteroscopy or mini-PCNL using ClearPETRA suction access sheaths in a small portion of our patient population seeking treatment for stones. The team also does not possess the bandwidth or personnel to consent patients who are non-English speaking.

What this trial measures

  • Stone free rate4 weeks post-procedure

    Stone free rate (no residual stone) on post-procedure CT