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Inspire Upper Airway Stimulation System

Phase 3

Obstructive Sleep Apnea | Unknown | Respiratory |Inspire Medical Systems, Inc.|Last Updated: Sep 18, 2025

Success Probability
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Trial Design
UNCONTROLLEDDMC
Total Trials1
Total Enrollment929
FDA Designations
No designations recorded
Clinical trial landscape

Inspire Upper Airway Stimulation System · 2 trials · 2 indications

Phase 3 2
NCT04801771Effects of Hypoglossal Nerve Stimulation on Cognition and Language in Down Syndrome and Obstructive Sleep ApneaDown Syndrome
ACTIVE NOT_RECRUITING57 Analytics
NCT01161420Stimulation Therapy for Apnea Reduction (Www.theSTARtrial.Com)Obstructive Sleep Apnea
COMPLETED929 Analytics
PHASE3ACTIVE NOT_RECRUITING
Effects of Hypoglossal Nerve Stimulation on Cognition and Language in Down Syndrome and Obstructive Sleep Apnea
Down SyndromeUnlock trial analytics
PHASE3COMPLETED
Stimulation Therapy for Apnea Reduction (Www.theSTARtrial.Com)
Obstructive Sleep ApneaUnlock trial analytics
Study Endpoints
Primary Endpoints
Change in intelligence using the Kaufman Brief Intelligence Scale (KBIT-2)
6 Months post-implant

Change in the Intelligence Quotient Standard Score of at least 0.5 standard deviation from baseline

Change in attention using the Wechsler Intelligence Scale
6 Months post-implant

Change in Cancellation scaled score of at least 0.5 standard deviation from baseline

Change in processing speed using the Cambridge Neuropsychological Test Automated Battery (CANTAB)
6 Months post-implant

Change in RTIFMDRT and RTIFMDMT raw scores of at least 0.5 standard deviation from baseline

Change in executive functioning using the Delis-Kaplan Executive Functioning System (DKEFS)
6 Months post-implant

Change in Category Functioning scaled score of at least 0.5 standard deviation from baseline

Change in learning and memory using the Cambridge Neuropsychological Test Automated Battery - Paired Associates Learning
6 Months post-implant

Change in PAL-TEA raw score of at least 0.5 standard deviation from baseline

Change in language using Expressive Language Sampling
6 Months post-implant

Change in % of unintelligible C-units, number of different word roots and mean length of C-units in morphemes of at least 0.5 standard deviation from baseline

Apnea Hypopnea Index
12 months

Demonstrate at least a 50% responder rate at the 12-month follow-up visit. An Inspire therapy AHI responder was defined as a subject who experienced at least a 50% reduction in AHI from baseline and had an AHI of less than 20 at the 12-month follow-up.

Oxygen Desaturation Index
12 months

Demonstrate at least a 50% responder rate at the 12-month follow-up visit. An Inspire therapy ODI responder was defines as a subject who experienced at least a 25% reduction in ODI from baseline.

Safety
12 months

The primary safety objective of this pivotal trial was to evaluate safety via a description of all reported adverse events. Per the IDE-approved protocol, no formal statistical hypothesis was tested as part of the safety assessment.

Secondary Endpoints
Rate of procedure and device-related adverse events
Implant through 12 Months post-implant
Change in Obstructive Sleep Apnea (OSA)
3, 6, 12 Months post-implant
Change in quality of life as measured by OSA-18 and ESS-CHAD questionnaires
12 months post-implant
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Study Design & Arms
AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Subjects implanted with Inspire UAS SystemEXPERIMENTALSubjects who meet eligibility criteria will be implanted with the Inspire Upper Airway Stimulation (UAS) System.
Inspire TherapyEXPERIMENTALInspire Upper Airway Stimulation System, is a permanent, implantable therapy device, which consists of three implantable components: IPG, stimulation lead, and a sensing lead. In additional the patient receives a remote to activate the therapy.
Interventions
NameTypeDescription
Inspire Upper Airway Stimulation (UAS) SystemDEVICEThe Inspire UAS System is an implantable device that provides hypoglossal nerve stimulation for the treatment of obstructive sleep apnea.
Inspire Upper Airway Stimulation SystemDEVICEInspire Upper Airway Stimulation System, is a permanent, implantable therapy device, which consists of three implantable components: IPG, stimulation lead, and a sensing lead. In additional the patient receives a remote to activate the therapy.
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Eligibility Criteria
Age Range10 Years to 21 Years
SexALL
Healthy VolunteersNo
Study Sites8

Inclusion Criteria: * Diagnosis of Down syndrome * Age 10-21 years * Prior adenotonsillectomy * Severe OSA (AHI \> 10, AHI \< 50, no more than 25% AHI attributable to central events) based on prior in-lab PSG performed after adenotonsillectomy and within 18 months of enrollment * Approval from at l...

Countries:United StatesBelgiumFranceGermanyNetherlands
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Recent Changes (Last 90 Days)
LOWMay 26, 2026NCT04801771primaryCompletionDate: changed
LOWMay 24, 2026NCT04801771studyFirstPostDate: changed