NCT07049744

Brief Summary

The goal of this interventional study is to assess the safety and performance of the XII Medical Hypoglossal Nerve Stimulation (HGNS) System in people who have moderate to severe Obstructive Sleep Apnea (OSA). Participation in this study involves being implanted with a Neurostimulator which provides electrical stimulation of the hypoglossal nerve (HGN). Participants will receive treatment at home during sleep, and participate in sleep studies to track and record the quality of the sleep. Participants will be monitored over the course of the study.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
30

participants targeted

Target at below P25 for not_applicable

Timeline
37mo left

Started Jun 2025

Longer than P75 for not_applicable

Geographic Reach
1 country

5 active sites

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

Study Progress22%
Jun 2025Jun 2029

Study Start

First participant enrolled

June 24, 2025

Completed
1 day until next milestone

First Submitted

Initial submission to the registry

June 25, 2025

Completed
8 days until next milestone

First Posted

Study publicly available on registry

July 3, 2025

Completed
1.4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 1, 2026

Expected
2.5 years until next milestone

Study Completion

Last participant's last visit for all outcomes

June 1, 2029

Last Updated

November 18, 2025

Status Verified

November 1, 2025

Enrollment Period

1.4 years

First QC Date

June 25, 2025

Last Update Submit

November 14, 2025

Conditions

Keywords

OSAHGNS

Outcome Measures

Primary Outcomes (1)

  • Safety of the XII Medical HGNS System

    Assessment of serious adverse device events

    Six months post-implantation

Secondary Outcomes (2)

  • Performance of the XII Medical HGNS System

    Six months post-implantation

  • Performance of the XII Medical HGNS System

    Six months post-implantation

Study Arms (1)

XII Medical HGNS System

EXPERIMENTAL

Participants receiving HGNS using the XII Medical System

Device: XII Medical HGNS System

Interventions

XII Medical HGNS System

XII Medical HGNS System

Eligibility Criteria

Age21 Years+
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Body Mass Index (BMI) ≤ 32 kg/m2
  • AHI of 15-50 events/hour
  • Central + mixed apnea index ≤ 25%
  • Participants who have either not tolerated, have failed or refused positive airway pressure (PAP)

You may not qualify if:

  • Pregnancy or breast-feeding.
  • Significant upper airway anatomic abnormalities
  • Hypoglossal nerve weakness
  • Central sleep apnoea condition
  • Significant positionally-dependent OSA.
  • Complete concentric patterns of soft palate collapse on DISE
  • Inadequately treated non-OSA sleep disorder(s).
  • Significant co-morbidities or prior surgeries that contra-indicate a surgical procedure or general anesthesia
  • Taking medications that in the opinion of the investigator may alter consciousness, the pattern of respiration, or sleep architecture
  • Participants on a GLP-1

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (5)

Canberra ENT

Canberra, Australian Capital Territory, Australia

RECRUITING

Westmead Hospital / Chris O'Brien Lifehouse

Sydney, New South Wales, Australia

RECRUITING

The Wollongong Hospital

Wollongong, New South Wales, 2500, Australia

RECRUITING

Princess Alexandra Hospital

Brisbane, Queensland, Australia

RECRUITING

Perth Head & Neck Surgery

Perth, Western Australia, Australia

RECRUITING

MeSH Terms

Conditions

Sleep Apnea, Obstructive

Condition Hierarchy (Ancestors)

Sleep Apnea SyndromesApneaRespiration DisordersRespiratory Tract DiseasesSleep Disorders, IntrinsicDyssomniasSleep Wake DisordersNervous System Diseases

Central Study Contacts

Professor Stuart MacKay FRACS

CONTACT

Study Design

Study Type
interventional
Phase
not applicable
Allocation
NA
Masking
NONE
Purpose
DEVICE FEASIBILITY
Intervention Model
SINGLE GROUP
Sponsor Type
INDUSTRY
Responsible Party
SPONSOR

Study Record Dates

First Submitted

June 25, 2025

First Posted

July 3, 2025

Study Start

June 24, 2025

Primary Completion (Estimated)

December 1, 2026

Study Completion (Estimated)

June 1, 2029

Last Updated

November 18, 2025

Record last verified: 2025-11

Data Sharing

IPD Sharing
Will not share

Locations