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Not yet recruitingNCT05939141OLEUpdated Jun 4, 2025

An Extension Study to Assess the Long-term Safety of the Genio® System

An observational study in Obstructive Sleep Apnea of Adult, sponsored by Nyxoah S.A.. Not yet recruiting at 7 sites in Australia. Per ClinicalTrials.gov, last updated 2025-06-04.

Sponsored by Nyxoah S.A. · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
39
Sex
All
01

Study summary

The objective of this study is to assess the long-term safety of the Genio® system in adult OSA patients with and without complete concentric collapse of the soft palate who have successfully been implanted with the Genio IS in a Nyxoah sponsored Clinical Investigation.

(Serious) Adverse Device Effects and Device Deficiencies in subjects previously implanted with a Nyxoah Genio implantable stimulator (IS) and having the IS still in-situ (with therapy activated or deactivated) will be collected.

The main question it aims to answer is: what is the long term safety profile of the Genio System?

Participants will be asked to refer back to the site per standard of care and report on any (Serious) Adverse Device Effects and Device Deficiencies that may have occurred.

Read the detailed description

The objective of this study is to assess the long-term safety of the Genio® system in adult OSA patients with and without complete concentric collapse of the soft palate who have successfully been implanted with the Genio IS in a Nyxoah sponsored Clinical Investigation.

All subjects that have previously participated in a Nyxoah sponsored clinical investigation in Australia, and who are currently still implanted with an implantable stimulator (with therapy activated or de-activated) will be asked to participate in this long-term safety follow-up study and will be asked to report any (Serious) Adverse Device Effects and Device Deficiencies that may have occurred.

02

Conditions studied

  • Obstructive Sleep Apnea of Adult

Keywords

  • OSA HGNS Hypoglossal Nerve Stimulation
03

In context

Sleep Apnea, Obstructive

2,198 studies on the registry are indexed under Sleep Apnea, Obstructive; 469 are open to participants now.

This study's planned enrollment of 39 is below the median of 104 across 648 observational studies indexed under Sleep Apnea, Obstructive.

Browse Sleep Apnea, Obstructive studies →

Lead sponsor

Nyxoah S.A. is the lead sponsor of 7 studies on the registry; 1 is open to participants now.

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

04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Adult OSA patients with and without complete concentric collapse of the soft palate who have successfully been implanted with the Genio IS in a Nyxoah sponsored Clinical Investigation in Australia.

Inclusion criteria

  • Subject voluntarily signed an Informed Consent Form
  • Subject is currently implanted with a Genio® Implantable Stimulator (IS), with therapy active or inactive, and was included in and subsequently exited a Nyxoah sponsored clinical investigation (either by study completion or withdrawal). These studies include, but are not limited to BLAST OSA (CL-GEN-001203), BETTER SLEEP (CL-GEN-001908), DREAM (CL-GEN-002033) or, subject is currently implanted with a Genio® Implantable Stimulator (IS) and accessing therapy via the TGA special access scheme (SAS).

Exclusion criteria

Exclusion Criteria:

  • None
05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
39 participants (estimated)
Patient registry
No

Groups and cohorts

  • OLE Subjects

    adult OSA patients with and without complete concentric collapse of the soft palate who have successfully been implanted with the Genio IS in a Nyxoah sponsored Clinical Investigation and having the device in-situ at the time of enrollment (with therapy activated or de-activated).

    Device: Genio System

Interventions

  • DeviceGenio System

    All participants have previously been implanted with a Genio® system implantable stimulator. This research is observational in nature (long term safety follow-up) and participants will not be exposed to additional procedures. The Genio System comprises of a bilateral Implantable Stimulator (IS), which is implanted via a minimally invasive surgery procedure and positioned over the genioglossus muscle with its electrodes positioned over both the left and right hypoglossal nerve branches. Stimulation of the hypoglossal nerve causes the tongue muscles to contract with the intention to maintain an open airway. The Implantable Stimulator receives energy pulses transmitted via the DP placed under the patient's chin and connected to the Activation Chip (AC), which contains the patient's stimulation parameters and contain a battery that provides energy.

06

What researchers measure

Primary outcomes

  1. Long-term safety

    Long term safety of the Genio System as measured by the rate and type of Adverse Device Effects, Serious Adverse device Effects and Device Deficiencies overtime in subjects in Australia previously implanted with a Nyxoah Genio implantable stimulator (IS) and having the IS still in-situ (with therapy activated or deactivated).

    Time frame: Yearly (until commercial availability of the device in Australia OR until no subjects remain implanted), anticipated average 5 years"

07

Study locations

7 sites
  • The Woolcock Institute Of Medical Research
    Sydney, New South Wales 2037, Australia
    • Ronald Grunstein · Contact
    • Ronald Grunstein, MBBS · Principal investigator
  • Westmead Public Hospital
    Sydney, New South Wales 2145, Australia
    • John Wheatley, MBBS · Contact
    • John Wheatley, MBBS · Principal investigator
  • Illawarra ENT and Head & Neck Clinic
    Sydney, New South Wales 2500, Australia
    • Stuart MacKay, MBBS · Contact
    • Stuart MacKay, MBBS · Principal investigator
  • Complete ENT
    Brisbane, Queensland 4000, Australia
    • Leon Kitipornchai, MBBS · Contact
    • Leon Kitipornchai, MBBS · Principal investigator
  • Institute for Breathing and Sleep (IBAS)
    Melbourne, Victoria 3084, Australia
    • Maree Barnes, MBBS · Contact
    • Maree Barnes, MBBS · Principal investigator
  • Monash Health - Department of Respiratory and Sleep Medicine
    Melbourne, Victoria 3168, Australia
    • Darren Mansfield · Contact
    • Darren Mansfield, MBBS · Principal investigator
  • Perth Head & Neck Surgery
    Perth, Western Australia 6009, Australia
    • Richard Lewis, MBBS · Contact
    • Richard Lewis, MBBS · Principal investigator
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 4, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05939141
Lead sponsor
Nyxoah S.A.
Collaborators
Nyxoah Pty. Ltd.
Responsible party
Sponsor
First posted
Jul 11, 2023
Start date
Nov 2025 (estimated)
Primary completion
Jul 17, 2029 (estimated)
Completion
Jul 17, 2029 (estimated)
Last update
Jun 4, 2025

Study contacts

Dan Mans
Contact
Dan.Mans@Nyxoah.com
+17633703594
Sharondeep Gill
Contact
Sharondeep.Gill@nyxoah.com
Richard Lewis, MBBS
principal investigator · Perth Head & Neck Surgery

Oversight

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

Not currently enrolling

This study is not yet recruiting, as verified in May 2025. You cannot join it, but the record below documents what was studied.

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