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IS-001

Phase 3

Ureter Injury | Small molecule | Other |Intuitive Surgical, Inc.|Last Updated: Jan 15, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials3
Total Enrollment295

FDA Designations

No designations recorded

Clinical trial landscape

IS-001 · 4 trials · 3 indications

Phase 3 1Phase 2 2Phase 1 1
NCT05954767IS-001 Injection in Patients Undergoing Robotic-Assisted Gynecological SurgeryUreter Injury
COMPLETED189 Analytics
PHASE3COMPLETED
IS-001 Injection in Patients Undergoing Robotic-Assisted Gynecological Surgery
Ureter InjuryUnlock trial analytics

Study Endpoints

Primary Endpoints

Independent reader assessment of ureter visualization by 1-5 Likert visualization rating scale from 1 not visible, 2 questionably visible, 3 low visibility, 4 visible, 5 clearly visible.
10 minutes

Evaluate ureter visualization by independent reader at (a) the pelvic brim and (b) uterine arteries location in Firefly® mode compared to white light mode at 10 minutes after IS-001 injection

Independent reader assessment of ureter visualization by 1-5 Likert visualization rating scale from 1 not visible, 2 questionably visible, 3 low visibility, 4 visible, 5 clearly visible
30 minutes

Evaluate ureter visualization by independent reader at (a) the pelvic brim and (b) uterine arteries location in Firefly® mode compared to white light mode at 30 minutes after IS-001 injection

Evaluate ureter visualization by Independent Reader
10 minutes after first IS-001 injection during surgery

Independent reader assessment of ureter visibility of a 5 second video segment of the surgical field in both Firefly® and standard white light comparator mode on a Five-point rating scale where 1 = Not Visible, 1 = Questionably Visible, 3 = Low Visibility, 4 = Visible, 5 = Clearly Visible

Evaluate fluorescent intensity of ureter by signal to background analysis
10 minutes

Fluorescent intensity of ureter evaluated as signal to background

Monitor Safety Parameters (vital signs, ECG, serum chemistry and hematology, urinalysis and adverse events)
14 days

Vital signs, 12-lead ECG, serum chemistry (CMP) and hematology (CBC), urinalysis and incidence of treatment-emergent adverse events

Secondary Endpoints

Independent reader assessment of ureter length delineation by line drawing on recorded frame measured in arbitrary unit length
10
Ureter visualization based on intraoperative surgeon's rating by 1-5 Likert visualization rating scale from 1 not visible, 2 questionably visible, 3 low visibility, 4 visible, 5 clearly visible
10 minutes
Independent reader assessment of ureter visualization by 1-5 Likert visualization rating scale from 1 not visible, 2 questionably visible, 3 low visibility, 4 visible, 5 clearly visible
45 minutes
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposePREVENTION

Treatment Arms

ArmTypeDescription
EfficacyOTHERSingle intravenous injection of IS-001 and ureter visualization and delineation will be compared in white light standard of care and near-infrared (NIR) imaging mode.
Single ArmEXPERIMENTALSingle Arm Safety and Feasibility Study of IS-001 with 20 mg in Multiple Injections
Dose-escalationEXPERIMENTALDose-cohort escalation of single intravenous injection of IS-001 starting with 20 mg (n=8), escalating in 20 mg increments until optimal dose is determined.
Optimal dose-characterizationEXPERIMENTALSingle intravenous injection of IS-001 at the optimal dose will be administered to subjects assigned to the treatment group. Safety control subjects will not receive any study drug but will undergo robotic surgery and all associated safety assessment clinical trial procedures.
IV IS-001 drugEXPERIMENTALIV IS-001 given during hysterectomy performed with da Vinci® Si/Xi Surgical System

Interventions

NameTypeDescription
IS-001DRUGIV injection of IS-001 drug substance with near infrared (NIR) imaging
No treatmentDRUGno drug injection
da Vinci® Si/Xi Surgical SystemDEVICErobot-assisted minimally invasive hysterectomy surgery performed with da Vinci® Si/Xi Surgical System with Firefly® Fluorescent Imaging
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Eligibility Criteria

Age Range16 Years to 75 Years
SexFEMALE
Healthy VolunteersNo
Study Sites8

Inclusion Criteria: 1. Female subject is between the ages of 16 and 75, inclusive at time of consent. 2. Subject is scheduled to undergo robotic-assisted gynecological procedure using a da Vinci® Surgical System with Firefly® Fluorescence Imaging. 3. Subject and/or subject's parent/guardian is will...

Countries:United States
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Frequently asked questions about IS-001

What is IS-001 used for?

IS-001 is an investigational small molecule being studied for use in hysterectomy and for the prevention or treatment of ureter injury during surgery. Clinical trials have evaluated it in patients undergoing robotic hysterectomy, robotic colorectal surgery, and robotic-assisted gynecological surgery.

Who makes IS-001?

IS-001 is being developed by Intuitive Surgical, Inc., a company traded on the Nasdaq under the ticker ISRG. The company has sponsored multiple clinical trials of IS-001 in the United States.

What phase is IS-001 in?

IS-001 is in clinical development. While early trials were Phase 1 and Phase 2, the most advanced completed trial is a Phase 3 study in patients undergoing robotic-assisted gynecological surgery. IS-001 is investigational and has not been approved by the FDA.

What clinical trials is IS-001 in?

IS-001 has been studied in four completed trials: NCT03006237 (Phase 1 safety and pharmacokinetics), NCT03937505 (Phase 2 in robotic hysterectomy), NCT05769257 (Phase 2 in robotic colorectal surgery), and NCT05954767 (Phase 3 in robotic-assisted gynecological surgery). All trials were conducted in the United States.

How does IS-001 work?

IS-001 is a small molecule, but its specific molecular target has not been disclosed. Clinical trials have focused on its safety, tolerability, pharmacokinetics, and efficacy in preventing ureter injury during robotic surgeries.