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RNS System

Phase 2

Epilepsy | Unknown | Neurology |Neuropace, Inc.|Last Updated: Jan 12, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLEDDMC
Total Trials1
Total Enrollment24

FDA Designations

No designations recorded

Clinical trial landscape

RNS System · 1 trial · 5 indications

Phase 2 1
NCT05339126RNS System LGS Feasibility StudyEpilepsy
ACTIVE NOT_RECRUITING24 Analytics
PHASE2ACTIVE NOT_RECRUITING
RNS System LGS Feasibility Study
EpilepsyUnlock trial analytics

Study Endpoints

Primary Endpoints

Safety: Annual device-related serious adverse event (SADE) rate
12 months post-implant

The lower limit of the 95% confidence interval of the annual SADE rate at months 12 and 24 post-implant is less than 33.6% and 22.0%, respectively (twice the SADE rate of 16.8% and 11.0%, respectively, at the same time points in the RNS System pivotal study)

Effectiveness: Blinded evaluation period (BEP) responder rate
12 months post-implant

The responder rate during one or both of the stimulation conditions (A or B) is ≥ 30%. The responder rate is the proportion of participants that are responders. A responder in this study is defined as a participant who has a ≥ 35% reduction in the frequency of drop seizures compared to that participant's pre-implant baseline.

Secondary Endpoints

Safety: Post-op SAE rate
4 weeks post-implant
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelCROSSOVER
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Condition AACTIVE_COMPARATORhigh-frequency short bursts (HFSB: 100 Hz, 160 µs pulse width, 200 msec burst)
Condition BACTIVE_COMPARATORlow-frequency long bursts (LFLB: 5 Hz, 160 µs pulse width, 5 sec burst)

Interventions

NameTypeDescription
RNS SystemDEVICEThe RNS System provides closed loop responsive brain stimulation. The Neurostimulator monitors the electrical activity of the brain to detect abnormal activity that could lead to a seizure. If abnormal activity is detected, the neurostimulator delivers electrical stimulation to the brain through the leads to help prevent the seizure before it occurs.
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Eligibility Criteria

Age Range12 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites6

Inclusion Criteria: * Participant is 15 years of age or older for first cohort; 12 years of age or older for second cohort. Note that age requirements for eligibility differ by cohort, as follows: the age limit for Cohort 1 is 15 years of age and above and the age limit for Cohort 2 may decrease to...

Countries:United States
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Frequently asked questions about RNS System

What is the RNS System used for in epilepsy?

The RNS System is an investigational device being studied for the treatment of epilepsy, specifically in patients with Lennox-Gastaut syndrome and intractable seizures. It is currently in Phase 2 clinical development and is not yet approved by the FDA.

Who makes the RNS System?

The RNS System is developed by Neuropace, Inc., a company traded on the stock exchange under the ticker symbol NPCE. The company is conducting clinical trials to evaluate the device's safety and effectiveness in treating epilepsy.

What phase is the RNS System in?

The RNS System is currently in Phase 2 clinical development. It is being evaluated in an active clinical trial for epilepsy, including Lennox-Gastaut syndrome, and has not yet received regulatory approval.

What clinical trials is the RNS System in?

The RNS System is being studied in the RNS System LGS Feasibility Study, identified as NCT05339126. This Phase 2 trial is active but not recruiting, with an enrollment of 24 participants in the United States.

Is the RNS System being tested in a randomized controlled trial?

Yes, the RNS System is being evaluated in a randomized, double-blind, active-controlled clinical trial. This study design is used to compare the device against an active control in patients with epilepsy, including those with Lennox-Gastaut syndrome.