ClinicalTrials.gg
CompletedNCT04950894OSPREYUpdated Jul 17, 2026

Treating Obstructive Sleep Apnea Using Targeted Hypoglossal Neurostimulation

An interventional study of Hypoglossal Nerve Stimulation in Obstructive Sleep Apnea, OSA and Apnea, sponsored by LivaNova. Completed at 19 sites in United States. Open to participants aged 22 Years and older. Per ClinicalTrials.gov, last updated 2026-07-17.

Sponsored by LivaNova · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was Oct 2024, 2 years ago, and no results have been posted to the registry.
Phase
Not applicable
Study type
Interventional
Enrollment
107
Allocation
Randomized
Ages
22 Years and older
Sex
All
01

Study summary

Multi-center, open-label, prospective, randomized clinical trial of the aura6000(R) System for the reduction of apnea and hypopneas in adult patients with moderate to severe obstructive sleep apnea who have failed or are unwilling to use positive airway pressure treatment.

Read the detailed description

All qualifying subjects will be implanted. Subjects will be randomized 2:1 in favor of Stimulation therapy (Active Group). Randomization will occur following implant and prior to the Month 1 visit.

The Active group will start Stimulation therapy at Month 1. The Control group may continue with their current sleep apnea treatment until Month 7, and will receive Stimulation therapy beginning at Month 7 +1Day. (All subjects are excluded from use of PAP or surgical treatments after enrollment through Month 13)

Safety and efficacy will be evaluated at Month 7, and again at Month 13.

02

Conditions studied

  • Obstructive Sleep Apnea
  • OSA
  • Apnea
  • Apnea, Obstructive
  • Apnea, Obstructive Sleep
  • Apnea+Hypopnea
  • Hypopnea, Sleep

Keywords

  • OSA
  • Snoring
  • Obstructive Sleep Apnea
  • CPAP
  • PAP
03

In context

Sleep Apnea, Obstructive

2,240 studies on the registry are indexed under Sleep Apnea, Obstructive; 475 are open to participants now.

This study's enrollment of 107 is above the median of 52 across 1,472 interventional studies indexed under Sleep Apnea, Obstructive.

Browse Sleep Apnea, Obstructive studies →

Lead sponsor

LivaNova is the lead sponsor of 40 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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.

Abbreviated: Additional criteria may apply:

Inclusion criteria

Inclusion Criteria:

  • Diagnosis of moderate to severe OSA
  • Declines to use or does not tolerate PAP therapy

Exclusion criteria

Exclusion Criteria:

  • Respiratory, cardiac, renal disease or other co-morbid conditions
  • > 35 kg/m2
  • Specific PSG criteria outlined in the protocol
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.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Double (Investigator, Outcomes assessor)
Enrollment
107 participants (actual)

Study arms

  • Active comparator
    Active

    HGN therapy activation at Month 1 - compared at Month 7 to Control group, continued stimulation through Month 13

    Device: Hypoglossal Nerve Stimulation

  • Other
    Control

    HGN therapy NOT activated at Month 1 - compared at Month 7 to Active group, stimulation will start at Month 7 + 1 Day and continue through Month 13

    Device: Hypoglossal Nerve Stimulation

Interventions

  • DeviceHypoglossal Nerve Stimulation

    Hypoglossal Nerve Stimulation started at Month 1 compared to no Stimulation (Control group will start stimulation at M7+1Day)

06

What researchers measure

Primary outcomes

  1. Rate of response to therapy when compared to no therapy for 6 months

    The primary efficacy endpoint is to demonstrate that the AHI responder rate of subjects with the device stimulation activated (Active Group) is statistically significantly higher than the AHI responder rate of subjects with the device stimulation not activated (Control Group) at M7.

    Time frame: Month 1 through Month 7

  2. Rate of all serious adverse device/procedure related events from time of implant through month 7

    The primary safety endpoint is a descriptive evaluation of all reported serious adverse device/procedure related events (SADEs) through M7 for both groups. Relationship to procedure, device and study will be adjudicated by a Clinical Events Committee (CEC).

    Time frame: Month 1 through Month 7

Secondary outcomes

  1. Decrease in Oxygen Desaturation Index (Efficacy)

    Time frame: Baseline through Month 7

  2. Change in Functional Outcomes of Sleep Questionnaire (Efficacy

    Time frame: Baseline through Month 7

  3. Change in Epworth Sleepiness Scale (Efficacy)

    Time frame: Baseline through Month 7

  4. Change in EQ-5D (Efficacy)

    Time frame: Baseline through Month 7

  5. Change in PROMIS SDI/SRI (Efficacy)

    Time frame: Baseline through Month 7

  6. Change in SF-36 (Efficacy)

    Time frame: Baseline through Month 7

  7. Change in CGI-S/CGI-I (Efficacy)

    Time frame: Baseline through Month 7

  8. Descriptive analysis of all reported Adverse Events (Safety)

    Time frame: Consent through Month 7

07

Study locations

19 sites
  • University of Alabama At Birmingham
    Birmingham, Alabama 35294, United States
  • University of Arizona
    Tucson, Arizona 85724, United States
  • Sacramento Ent
    Roseville, California 95661, United States
  • Paul Schalch Lepe, Md/Silenso Clinic
    San Diego, California 92130, United States
  • Sleep Medicine Specialists of South Florida
    Miami, Florida 33126, United States
  • Morton Plant Mease Health Care
    Safety Harbor, Florida 34695, United States
  • Advanced Ent Associates
    Atlanta, Georgia 30342, United States
  • Norton Healthcare
    Louisville, Kentucky 40218, United States
  • Alivation Research Llc
    Lincoln, Nebraska 68526, United States
  • Hackensack University Medical Center
    Hackensack, New Jersey 07601, United States
  • Weill Cornell Medical College
    New York, New York 10024, United States
  • Raleigh Neurology Associates, Pa
    Raleigh, North Carolina 27607, United States
  • Penn State Health
    Hershey, Pennsylvania 17033, United States
  • Lankenau Hospital
    Philadelphia, Pennsylvania 19107, United States
  • Medical University of South Carolina
    Charleston, South Carolina 29425, United States
  • Bogan Sleep Consultants, Llc
    Columbia, South Carolina 29201, United States
  • Houston Methodist
    Houston, Texas 77030, United States
  • Epic Medical Research
    Red Oak, Texas 75154, United States
  • University of Utah
    Salt Lake City, Utah 84108, United States
08

References and documents

Publications

  • Malhotra A, Schwartz AR, Lovett E, Juran N, Nguyen SA, Barrera JE, Bogan RK, Mickelson SA, Boghara H, Miller M, Jacobowitz O; OSPREY Investigators. Proximal Hypoglossal Nerve Stimulation for Obstructive Sleep Apnea in the OSPREY Study : A Randomized Controlled Trial. Ann Intern Med. 2026 Jun;179(6):812-822. doi: 10.7326/ANNALS-25-04414. Epub 2026 Apr 21. PubMed 42008810 ↗
  • Jacobowitz O, Schwartz AR, Lovett EG, Ranuzzi G, Malhotra A. Design and rationale for the treating Obstructive Sleep Apnea using Targeted Hypoglossal Nerve Stimulation (OSPREY) trial. Contemp Clin Trials. 2022 Aug;119:106804. doi: 10.1016/j.cct.2022.106804. Epub 2022 May 22. PubMed 35613672 ↗

Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 17, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04950894
Lead sponsor
LivaNova
Responsible party
Sponsor
First posted
Jul 6, 2021
Start date
Feb 24, 2022
Primary completion
Oct 17, 2024
Completion
Apr 23, 2025
Last update
Jul 17, 2026

Study contacts

Atul Malhotra, MD
principal investigator · UCSD Pulmonary and Critical Care Medicine

Oversight

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

Not currently enrolling

This study is completed, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.

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