NephrolithiasisNCT07619456
Intrarenal Pressure in Suctioning vs. Non-suctioning Sheaths
A study testing Suctioning-UAS and Non-suctioning-UAS in people with Nephrolithiasis, run by Icahn School of Medicine at Mount Sinai at 1 site in United States.
Trial summary
Interest in monitoring intrarenal pressure (IRP) during flexible ureteroscopy (fURS) has grown, especially due to its potential association with improved postoperative efficiency and safety. A prominent technique for managing IRP during fURS is the use of ureteral access sheaths (UAS), which are known to reduce IRP. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Nephrolithiasis
- What is being tested?
- Suctioning-UAS and Non-suctioning-UAS
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 21 participants
- Where
- 1 siteUnited States
- Study dates
- 3 Apr 2025to 5 Dec 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Adults aged 18 years and older.
- Diagnosed with kidney stones and scheduled for fURS.
- Stone burden > 1 cm and/or multiple stones will be eligible.
- Able and willing to provide informed consent.
Who cannot join
- Pregnant persons as determined by pre-operative urine pregnancy test (standard of care at our institution)
- Untreated UTI
- Patients with urinary anomalies (e.g., urinary diversion, ureteral reconstruction, horseshoe kidney)
- Single stone < 1 cm
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Comparing the Intrarenal Pressure Between Suctioning and Non-Suctioning Access Sheaths Using the LithoVue Elite Ureteroscope System
Interest in monitoring intrarenal pressure (IRP) during flexible ureteroscopy (fURS) has grown, especially due to its potential association with improved postoperative efficiency and safety. A prominent technique for managing IRP during fURS is the use of ureteral access sheaths (UAS), which are known to reduce IRP. Suction-equipped access sheaths provide additional benefits by continuously evacuating dust and stone fragments during the procedure, potentially enhancing stone-free rates. However, IRP during suctioning procedures has yet to be thoroughly investigated. The aim of this study is to compare the IRP during fURS using UAS with and without suctioning technique.
Read the detailed description
Interest in monitoring intrarenal pressure (IRP) during flexible ureteroscopy (fURS) has grown, especially due to its potential association with improved postoperative efficiency and safety. With advances in technology, precise tools like the LithoVue™ Elite now enables continuous IRP measurement, facilitating accurate data collection throughout the procedure. A prominent technique for managing IRP during fURS is the use of ureteral access sheaths (UAS), which are known to reduce IRP. Suction-equipped access sheaths provide additional benefits by continuously evacuating dust and stone fragments during the procedure, potentially enhancing stone-free rates (SFR). However, IRP during suctioning procedures has yet to be thoroughly investigated. This study is a randomized controlled trial comparing continuous intrarenal pressure (IRP) measurements during flexible ureteroscopy (fURS) using a suctioning ureteral access sheath (UAS) versus a non-suctioning UAS. The study will be conducted over an 18-month period and will include all patients over 18 years of age who are scheduled to undergo fURS for a stone burden greater than 1 cm and/or multiple stones. Patients who are pregnant, have an untreated urinary tract infection (UTI), urinary tract anomalies such as urinary diversion, ureteral reconstruction, or horseshoe kidney, or who have a single stone smaller than 1 cm will be excluded from participation. All procedures will take place at Mount Sinai West, with patients enrolled from the practices of two endourology-trained specialists, Dr. William Atallah and Dr. Mantu Gupta. Participants will be randomized to either the suctioning-UAS arm using the ClearPETRA Flexible and Navigable Suction UAS or the non-suctioning-UAS arm using the BSC Navigator device.
- Conditions
- Nephrolithiasis
- Being tested
- Suctioning-UAS, Non-suctioning-UAS
- Medical subject headings
- Nephrolithiasis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Suctioning-UASDevice
Participants undergoing flexible ureteroscopy (fURS) will receive a suctioning ureteral access sheath using the ClearPETRA Flexible and Navigable Suction UAS. Continuous intrarenal pressure (IRP) measurements will be recorded throughout the procedure using the LithoVue Elite ureteroscope system.
Non-suctioning-UASDevice
Participants undergoing flexible ureteroscopy (fURS) will receive a standard non-suctioning ureteral access sheath using the BSC Navigator device. Continuous intrarenal pressure (IRP) measurements will be recorded throughout the procedure using the LithoVue Elite ureteroscope system.
| Study group | Role | What they receive |
|---|---|---|
| Suctioning-UAS | Experimental | Placement of the ClearPETRA Flexible and Navigable Suction UAS during flexible ureteroscopy with continuous suction applied during stone treatment. Receives: Device: Suctioning-UAS |
| Non-suctioning-UAS | Active comparator | Placement of the BSC Navigator during flexible ureteroscopy without suction during stone treatment. Receives: Device: Non-suctioning-UAS |
What is being measured
The primary outcome is the main question the study is designed to answer.
Intrarenal Pressure (IRP) During Flexible Ureteroscopy
Continuous measurement of intrarenal pressure using the LithoVue Elite ureteroscope system.
Measured: Intraoperative (during procedure)
Time spent above Intrarenal Pressure (IRP) threshold during Flexible Ureteroscopy
Time spent above Intrarenal Pressure (IRP) thresholds of 20, 40, 60, 80, and 100 mmHg using the LithoVue Elite ureteroscope system.
Measured: Intraoperative (during procedure)
Secondary outcomes (3)
Stone-Free Rate (SFR) on Postoperative CT Imaging
Rate of stone-free status assessed by non-contrast CT scan using a 4-grade scale (Grade A: completely stone-free; Grade B: residual fragments <2 mm; Grade C: residual fragments 2-4 mm; Grade D: residual fragments >4 mm).
Measured: 4-8 weeks postoperatively
Postoperative Pain Score (VAS)
Visual Analog Scale (VAS) pain score. Scale ranges from 0 (no pain) to 10 (worst pain imaginable); higher scores indicate greater pain intensity.
Measured: In the Post-Anesthesia Care Unit (PACU), prior to discharge on the day of surgery (on average 1.5 hours post operatively)
Number of Postoperative Complications
Number of any postoperative complications occurring within 30 days of the procedure (as defined by the study protocol and standard Clavien-Dindo classification or similar).
Measured: 30 days postoperatively
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Jun 2026
- Study start3 Apr 2025
- Primary completion10 Oct 2025
- Study completion5 Dec 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for NephrolithiasisStudies of the same condition, open and under way.
- More trials run by Icahn School of Medicine at Mount SinaiThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Outcomes assessor
- Enrolment
- 21 participants (actual)
Sponsor and investigators
- Lead sponsor
- Icahn School of Medicine at Mount Sinai
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Mantu Gupta, Icahn School of Medicine at Mount Sinai
- Investigators
- Mantu Gupta, MD, Principal investigator, Icahn School of Medicine at Mount Sinai
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07619456
- Sponsor's protocol ID
- STUDY-25-00111
- Status last verified
- May 2026
- First submitted
- 26 May 2026
- Last updated
- 2 Jun 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
- Individual data sharing
- No: To to protect participant privacy
Study at a glance
From the registry record, last updated by the sponsor on 2 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparing the Intrarenal Pressure Between Suctioning and Non-Suctioning Access Sheaths Using the LithoVue Elite Ureteroscope System
- ClinicalTrials.gov ID
- NCT07619456
- Acronym / sponsor ID
- STUDY-25-00111
- Conditions
- Nephrolithiasis
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 21 participants (actual)
- Lead sponsor
- Icahn School of Medicine at Mount SinaiUniversity, hospital or other
- Study start
- 3 Apr 2025 (actual)
- Primary completion
- 10 Oct 2025 (actual)
- Study completion
- 5 Dec 2025 (actual)
- First posted
- 2 Jun 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Interest in monitoring intrarenal pressure (IRP) during flexible ureteroscopy (fURS) has grown, especially due to its potential association with improved postoperative efficiency and safety. A prominent technique for managing IRP during fURS is the use of ureteral access sheaths (UAS), which are known to reduce IRP. Suction-equipped access sheaths provide additional benefits by continuously evacuating dust and stone fragments during the procedure, potentially enhancing stone-free rates. However, IRP during suctioning procedures has yet to be thoroughly investigated. The aim of this study is to compare the IRP during fURS using UAS with and without suctioning technique.
Detailed description
Interest in monitoring intrarenal pressure (IRP) during flexible ureteroscopy (fURS) has grown, especially due to its potential association with improved postoperative efficiency and safety. With advances in technology, precise tools like the LithoVue™ Elite now enables continuous IRP measurement, facilitating accurate data collection throughout the procedure. A prominent technique for managing IRP during fURS is the use of ureteral access sheaths (UAS), which are known to reduce IRP. Suction-equipped access sheaths provide additional benefits by continuously evacuating dust and stone fragments during the procedure, potentially enhancing stone-free rates (SFR). However, IRP during suctioning procedures has yet to be thoroughly investigated. This study is a randomized controlled trial comparing continuous intrarenal pressure (IRP) measurements during flexible ureteroscopy (fURS) using a suctioning ureteral access sheath (UAS) versus a non-suctioning UAS. The study will be conducted over an 18-month period and will include all patients over 18 years of age who are scheduled to undergo fURS for a stone burden greater than 1 cm and/or multiple stones. Patients who are pregnant, have an untreated urinary tract infection (UTI), urinary tract anomalies such as urinary diversion, ureteral reconstruction, or horseshoe kidney, or who have a single stone smaller than 1 cm will be excluded from participation. All procedures will take place at Mount Sinai West, with patients enrolled from the practices of two endourology-trained specialists, Dr. William Atallah and Dr. Mantu Gupta. Participants will be randomized to either the suctioning-UAS arm using the ClearPETRA Flexible and Navigable Suction UAS or the non-suctioning-UAS arm using the BSC Navigator device.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Suctioning-UAS | Experimental | Device: Suctioning-UASPlacement of the ClearPETRA Flexible and Navigable Suction UAS during flexible ureteroscopy with continuous suction applied during stone treatment. |
| Non-suctioning-UAS | Active comparator | Device: Non-suctioning-UASPlacement of the BSC Navigator during flexible ureteroscopy without suction during stone treatment. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (4 listed)
- Adults aged 18 years and older.
- Diagnosed with kidney stones and scheduled for fURS.
- Stone burden > 1 cm and/or multiple stones will be eligible.
- Able and willing to provide informed consent.
Key exclusion criteria (4 listed)
- Pregnant persons as determined by pre-operative urine pregnancy test (standard of care at our institution)
- Untreated UTI
- Patients with urinary anomalies (e.g., urinary diversion, ureteral reconstruction, horseshoe kidney)
- Single stone < 1 cm
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Suctioning-UASParticipants undergoing flexible ureteroscopy (fURS) will receive a suctioning ureteral access sheath using the ClearPETRA Flexible and Navigable Suction UAS. Continuous intrarenal pressure (IRP) measurements will be recorded throughout the procedure using the LithoVue Elite ureteroscope system. | Device | Suctioning-UAS |
| Non-suctioning-UASParticipants undergoing flexible ureteroscopy (fURS) will receive a standard non-suctioning ureteral access sheath using the BSC Navigator device. Continuous intrarenal pressure (IRP) measurements will be recorded throughout the procedure using the LithoVue Elite ureteroscope system. | Device | Non-suctioning-UAS |
Primary outcome
Intrarenal Pressure (IRP) During Flexible Ureteroscopy
Time frame: Intraoperative (during procedure)
Continuous measurement of intrarenal pressure using the LithoVue Elite ureteroscope system.
Time spent above Intrarenal Pressure (IRP) threshold during Flexible Ureteroscopy
Time frame: Intraoperative (during procedure)
Time spent above Intrarenal Pressure (IRP) thresholds of 20, 40, 60, 80, and 100 mmHg using the LithoVue Elite ureteroscope system.
3 secondary outcomes
Stone-Free Rate (SFR) on Postoperative CT Imaging
Time frame: 4-8 weeks postoperatively
Postoperative Pain Score (VAS)
Time frame: In the Post-Anesthesia Care Unit (PACU), prior to discharge on the day of surgery (on average 1.5 hours post operatively)
Number of Postoperative Complications
Time frame: 30 days postoperatively
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Jun 2026.
- Individual participant dataSharing planned: No. To to protect participant privacy
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Mantu Gupta, MD principal investigator
Icahn School of Medicine at Mount Sinai
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Suctioning-UAS and Non-suctioning-UAS in people with Nephrolithiasis, run by Icahn School of Medicine at Mount Sinai at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 4 inclusion and 4 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Intrarenal Pressure (IRP) During Flexible Ureteroscopy (time frame: Intraoperative (during procedure)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Jun 2026.