ClinicalTrials.gg
CompletedNCT06330701STARUpdated Feb 18, 2026Results posted

Stone Access and Removal (STAR) Study

An interventional study of Robotic-assisted mini-PCNL in Kidney Calculi, sponsored by Auris Health, Inc.. Completed at 2 sites in United States. Open to participants aged 22 Years and older. Per ClinicalTrials.gov, last updated 2026-02-18.

Sponsored by Auris Health, Inc. (part of Johnson & Johnson) · Not applicable, Interventional, and Other

Phase
Not applicable
Study type
Interventional
Enrollment
15
Allocation
Not applicable
Ages
22 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 193 studies in Kidney Calculi with a site in United States — 42 open to participants now, 58 under way, none of them phase 3. Kidney Calculi · United States.

Enrollment
125th of 165
15 · median 47
Started
2024
with 12 others
No phase
113 of 193
29 open now
Registered
153rd of 193
by date

Among the 193 studies in Kidney Calculi with a site in United States, this one is the 125th largest by enrollment of the 165 interventional ones that give a count, is one of 13 that started in 2024, is one of 113 with no phase, and was the 153rd registered.

Kidney Calculi

509 studies on the registry are indexed under Kidney Calculi; 146 are open to participants now.

Browse Kidney Calculi studies →

Open to participants now

42 of the 193 studies in Kidney Calculi with a site in United States are open now. Recruiting first, the newest first:

37 more — sign in →

All 42 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 88 Kidney Calculi studies recruiting now, 48 (55%) set no upper age limit and 23 (26%) stop at 75 or younger; 6 take children under 18; 11 take healthy volunteers.

This study: 22 Years and older · all sexes · no healthy volunteers.

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02

Study summary

The purpose of the study is to assess procedural completion, the post-operative stone clearance and the safety profile following robotic mini-Percutaneous Nephrolithotomy (PCNL) performed with the MONARCH Platform, Urology.

03

Conditions studied

  • Kidney Calculi

Browse trials for

Keywords

  • Nephrolithotomy
  • Percutaneous
  • Ureteroscopy
  • Robotic
  • Monarch
  • Kidney Calculi
04

Who can participate

Ages eligible
22 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Simple renal caliceal and/or pyelo stone(s) with stone burden => 1 cm, identified on CT scan, and appropriate for PCNL treatment according to AUA guidelines
  • Normal upper tract anatomy, amenable to PCNL and ureteroscopy
  • Participants with a percutaneous tract length \< 15 cm as measured by the estimation of the skin to stone or skin to appropriate calyx for treatment through a CT scan
  • Participant is an appropriate candidate for a mini-PCNL based on the clinical guidelines and investigator assessment.

Exclusion criteria

Exclusion Criteria:

Pre-Procedure:Exclusion Criteria:

  • Any medical or physical condition/limitation that would contra-indicate a conventional ureteroscopy or PCNL in the supine position (e.g., atypical interposition of visceral organs (bowel, spleen, or liver))
  • Expected additional procedure, or participation in any clinical trial, from 30 days prior to the study procedure and throughout the duration of the study, which might impact this study's results
  • A solitary functioning kidney
  • Female participants who are pregnant or nursing or those of refusing a pregnancy test
  • Presence of ureteral impacted stones

Intra-Procedure Exclusion Criteria:

- Any presenting condition discovered intra-procedurally that in the opinion of the investigator would make participating in this study not in the participant's best interest.

Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
15 participants (actual)

Study arms

  • Experimental
    Robotic mini-Percutaneous Nephrolithotomy (PCNL)

    Participants with kidney stones will be enrolled for a robotic-assisted mini-percutaneous nephrolithotomy procedure using the MONARCH Platform, Urology for removal of kidney stones. The MONARCH Platform, Urology enables electro-mechanical articulation and precise control of a flexible ureteroscope and/or a flexible mini-PCNL suction catheter ("catheter") for visualization and access to the urinary tract for diagnostic and therapeutic procedures.

    Device: Robotic-assisted mini-PCNL

Interventions

  • DeviceRobotic-assisted mini-PCNL

    This robotically enabled hybrid procedure called the MONARCH Mini-PCNL will allow the clinician to obtain retrograde and percutaneous access to participant's kidney under continuous visualization for therapeutic applications (i.e., stone removal).

06

What researchers measure

Primary outcomes

  1. Percentage of Participants Who Achieved Successful Completion of Robotic-Assisted Combined Intrarenal Surgery (RACIRS) Kidney Stone Removal Procedure

    Percentage of participants who achieved successful completion of the RACIRS kidney stone removal procedure were reported. Successful completion of the robotic-assisted kidney stone removal procedure was defined as using robotic-assistance provided by the MONARCH Platform, Urology to achieve the following procedure milestones: (1) gained safe concomitant (that is, retrograde and antegrade) access to the upper urinary tract, (2) located and visualized kidney stones, (3) enabled fragmentation of stones by standard of care method, (4) evacuated stone fragments and dust, and (5) completed treatment without need for case conversion, as assessed by the investigator.

    Time frame: On the day of procedure at Day 1

Secondary outcomes

  1. Stone Free Rate

    Stone free rate was computed as the percentage of participants who were stone free assessed by computed tomography (CT) scan at post-operative Day 30. Stone free was defined as having less than or equal to (\<=) 4 millimeters (mm) residual stones detected by CT.

    Time frame: Post-operative Day 30

  2. Number of Participants With Adverse Events (AEs)

    AEs were defined as any undesirable clinical occurrence in a participant, whether or not it is considered to be device-related. Adverse events were graded using the Clavien-Dindo classification system. Clavien-Dindo consists of 7 grades (I, II, IIIa, IIIb, IVa, IVb and V). The introduction of the subclasses a and b allows a contraction of the classification into 5 grades (I, II, III, IV and V) depending on the size of the population. Grade I to II included deviations from normal recovery requiring minimal or pharmacologic treatment. Grade III to IV involved surgical/endoscopic/radiologic interventions or life-threatening complications, with subgrades based on anesthesia and organ dysfunction. Grade V represented death of the participant.

    Time frame: From the day of procedure (Day 1) up to 90 days post-procedure

  3. Percentage of Participants With Procedure Conversions to Conventional Treatment Methods Due to Study Device-related Safety Event

    Percentage of participants with procedures converted to conventional stone removal procedures (for example, ureteroscopy or percutaneous nephrolithotomy) due to the occurrence of a study device-related safety event was reported. A qualifying safety event was a study device-related adverse event that occurred during the study procedure, which prompted the physician to abort the study procedure, and pursue a conventional stone removal procedure.

    Time frame: On the day of procedure (Day 1)

07

Results

Posted Feb 18, 2026

Participant flow

Participant flow — Overall Study
MilestoneRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Started15
Completed12
Not completed3
Withdrew: Withdrawal by subject2
Withdrew: Lost to follow-up1

Outcome measures

PrimaryPercentage of Participants Who Achieved Successful Completion of Robotic-Assisted Combined Intrarenal Surgery (RACIRS) Kidney Stone Removal Procedure

Percentage of participants who achieved successful completion of the RACIRS kidney stone removal procedure were reported. Successful completion of the robotic-assisted kidney stone removal procedure was defined as using robotic-assistance provided by the MONARCH Platform, Urology to achieve the following procedure milestones: (1) gained safe concomitant (that is, retrograde and antegrade) access to the upper urinary tract, (2) located and visualized kidney stones, (3) enabled fragmentation of stones by standard of care method, (4) evacuated stone fragments and dust, and (5) completed treatment without need for case conversion, as assessed by the investigator.

Time frame:
On the day of procedure at Day 1
Reported as:
Number · percentage of participants
Percentage of Participants Who Achieved Successful Completion of Robotic-Assisted Combined Intrarenal Surgery (RACIRS) Kidney Stone Removal Procedure
percentage of participantsRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Gained safe concomitant access to the upper urinary tract100 (68.1 to 99.8)
Located and visualized kidney stones100
Achieved fragmentation of stones100
Evacuated stone fragments and dust100
Complete treatment without need for case conversion, as assessed by the investigator93.3
SecondaryStone Free Rate

Stone free rate was computed as the percentage of participants who were stone free assessed by computed tomography (CT) scan at post-operative Day 30. Stone free was defined as having less than or equal to (\<=) 4 millimeters (mm) residual stones detected by CT.

Time frame:
Post-operative Day 30
Reported as:
Number · percentage of participants
Stone Free Rate
percentage of participantsRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Stone Free Rate50 (21.1 to 78.9)
SecondaryNumber of Participants With Adverse Events (AEs)

AEs were defined as any undesirable clinical occurrence in a participant, whether or not it is considered to be device-related. Adverse events were graded using the Clavien-Dindo classification system. Clavien-Dindo consists of 7 grades (I, II, IIIa, IIIb, IVa, IVb and V). The introduction of the subclasses a and b allows a contraction of the classification into 5 grades (I, II, III, IV and V) depending on the size of the population. Grade I to II included deviations from normal recovery requiring minimal or pharmacologic treatment. Grade III to IV involved surgical/endoscopic/radiologic interventions or life-threatening complications, with subgrades based on anesthesia and organ dysfunction. Grade V represented death of the participant.

Time frame:
From the day of procedure (Day 1) up to 90 days post-procedure
Reported as:
Count of participants · Participants
Number of Participants With Adverse Events (AEs)
ParticipantsRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Grade I11
Grade II5
Grade III1
Grade IV0
Grade V0
SecondaryPercentage of Participants With Procedure Conversions to Conventional Treatment Methods Due to Study Device-related Safety Event

Percentage of participants with procedures converted to conventional stone removal procedures (for example, ureteroscopy or percutaneous nephrolithotomy) due to the occurrence of a study device-related safety event was reported. A qualifying safety event was a study device-related adverse event that occurred during the study procedure, which prompted the physician to abort the study procedure, and pursue a conventional stone removal procedure.

Time frame:
On the day of procedure (Day 1)
Reported as:
Number · percentage of participants
Percentage of Participants With Procedure Conversions to Conventional Treatment Methods Due to Study Device-related Safety Event
percentage of participantsRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Percentage of Participants With Procedure Conversions to Conventional Treatment Methods Due to Study Device-related Safety Event0

Adverse events

Collected over All cause mortality: From baseline (Day -120) up to 90 days post-procedure. For serious adverse events (SAEs) and other AEs: From day of the procedure (Day 1) up to 90 days post-procedure. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Robotic Assisted Combined Intrarenal Surgery (RACIRS)0/15 (0%)1/15 (6.7%)13/15 (86.7%)
Most frequent serious events
Most frequent serious events
EventRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Intra-abdominal fluid collectionGastrointestinal disorders1/15
Most frequent other events
Showing 10 of 22
Most frequent other events
EventRobotic Assisted Combined Intrarenal Surgery (RACIRS)
Flank painMusculoskeletal and connective tissue disorders7/15
Bladder spasmRenal and urinary disorders3/15
HaematuriaRenal and urinary disorders3/15
DysuriaRenal and urinary disorders2/15
ConstipationGastrointestinal disorders2/15
Muscle spasmsMusculoskeletal and connective tissue disorders1/15
Musculoskeletal discomfortMusculoskeletal and connective tissue disorders1/15
ChromaturiaRenal and urinary disorders1/15
Abdominal painGastrointestinal disorders1/15
NauseaGastrointestinal disorders1/15

Baseline characteristics

Age, Continuous
Age, Continuous(Years)Robotic Assisted Combined Intrarenal Surgery (RACIRS)
Mean57.6 ± 11.13
Sex: Female, Male
Sex: Female, Male(Participants)Robotic Assisted Combined Intrarenal Surgery (RACIRS)
Female5
Male10
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Robotic Assisted Combined Intrarenal Surgery (RACIRS)
Hispanic or Latino0
Not Hispanic or Latino15
Unknown or Not Reported0
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Robotic Assisted Combined Intrarenal Surgery (RACIRS)
American Indian or Alaska Native0
Asian0
Native Hawaiian or Other Pacific Islander0
Black or African American1
White14
More than one race0
Unknown or Not Reported0
Number of Participants With Stone
Number of Participants With Stone(Participants)Robotic Assisted Combined Intrarenal Surgery (RACIRS)
1 Stone5
2 Stones4
3 Stones2
4 Stones1
6 Stones2
7 Stones1
Participant-Level Pre-operative Linear Stone Burden
Participant-Level Pre-operative Linear Stone Burden(Millimeters (mm))Robotic Assisted Combined Intrarenal Surgery (RACIRS)
Mean35.1 ± 18.01
Participant-Level Pre-operative Stone Volume
Participant-Level Pre-operative Stone Volume(Millimeter cube (mm^3))Robotic Assisted Combined Intrarenal Surgery (RACIRS)
Mean2959.3 ± 2246.0
08

Study locations

2 sites
  • Indiana University
    Indianapolis, Indiana 46202, United States
  • UW School of Medicine and Public Health
    Madison, Wisconsin 53705, United States
09

References and documents

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jan 2024 to primary completion in Dec 2024, 11 months.

Results were first posted in Feb 2026, 1 year 1 month after primary completion.

Of 199 interventional studies with no phase under Kidney Calculi, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 12 and three quarters within 51. This study's 11 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 19, 2024
First posted
Mar 26, 2024
StartActual
Jan 18, 2024
Primary completionActual
Dec 23, 2024
CompletionActual
Mar 11, 2025
Results first posted
Feb 18, 2026
Last update
Feb 18, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 18, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT06330701
Lead sponsor
Auris Health, Inc.
Responsible party
Sponsor
First posted
Mar 26, 2024
Start date
Jan 18, 2024
Primary completion
Dec 23, 2024
Completion
Mar 11, 2025
Results posted
Feb 18, 2026
Last update
Feb 18, 2026

Study contacts

Margaret A. Knoedler, MD
principal investigator · University of Wisconsin, Madison

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

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