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Completed

NCT Number: NCT06627127

A Study to Investigate the Feasibility and Respiratory Effects of Stimulating Two Functional Targets (Neural and/or Muscular) for the Treatment of Obstructive Sleep Apnea

This proof-of-concept study is to collect acute and short-term sub-acute (if applicable) changes in respiratory parameters following the percutaneous placement of electrode arrays. Acute placement and data collection will be conducted while performing a Drug Induced Sleep Endoscopy (DISE) where the goal will be to quantify changes in airflow with stimulation. Data will also be collected during a one- or two-night polysomnography (PSG) to investigate airflow and sleep stability responses with and without different levels of stimulation during sleep. Where feasible, OSA severity data will be collected, as measured via the apnea/hypopnea index (AHI) with stimulation versus without stimulation as a secondary objective. Both data collections will be done when stimulating the hypoglossal nerve (HGN) or Genioglossus muscle (GG) and a second functional target (Ansa Cervicalis - AC) or the strap muscles (sternohyoid and sternothyroid) with a set of electrode arrays either in combination or separately.

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Key information

Conditions

Sleep Apnea Apnea Dyssomnias Mental Disorders Nervous System Diseases Neurologic Manifestations Pathological Conditions, Signs and Symptoms Respiration Disorders Respiratory Tract Diseases Signs and Symptoms Sleep Apnea Syndromes Sleep Apnea, Obstructive Sleep Disorder Sleep Disorders, Intrinsic Sleep Wake Disorders

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Illawara ENT, Wollongong, New South Wales, Australia

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

A subject must meet all of the following inclusion criteria to be eligible for inclusion in this study:

  • Age above 18 years not under guardianship, under curatorship or under judicial protection.
  • Body Mass Index (BMI) < 35 kg/m2.
  • OSA (15 < AHI < 80 events/h sleep) documented by a sleep study performed during the past 24 months in the absence of any major weight change or other medical issues.
  • Subject must be eligible for a diagnostic DISE or surgical procedure (acute study measures only).
  • Written informed consent obtained from the subject prior to performing any study specific procedure.
  • Willing and capable to comply with all study requirements, including specific lifestyle considerations, evaluation procedures and questionnaires for the whole duration of the trial.

Exclusion criteria

Subjects meeting any of the following criteria will be excluded from participation in this study:

  • Major anatomical or functional abnormalities that would impair the ability of the electrode arrays to be positioned.
  • Significant comorbidities that contraindicate surgery or general anesthesia/DISE
  • Significant tongue weakness
  • Any other chronic medical illness or condition that contraindicates a surgical procedure or general anesthesia/DISE in the judgment of the investigator.
  • Prior surgery or treatments that could compromise the placement and effectiveness of the electrode array systems:
  • Airway cancer surgery or radiation,
  • Mandible or maxilla surgery in the previous 3 years (not counting dental treatments),
  • Other upper airway surgery to remove obstructions related to OSA in the previous 3 months (e.g., uvulopalatopharyngoplasty (UPPP), tonsillectomy, nasal airway surgery),
  • Prior hypoglossal nerve stimulation device implantation.
  • Currently pregnant, or breastfeeding during the study period

Treatment and study plan

Target Stimulation (HGN, AC, GG, Strap muscles)

Device

Stimulation of the HGN or GG along with AC or strap muscles.

Primary outcomes

  1. Feasibility of technical delivery in stimulating target nerves or muscles

    Time frame: Day 0 to 3

    Assessment of the technical ability to simulate the target nerves and/or muscles as observed during nasoendoscopy and ultrasound imaging

  2. Assessment of the required stimulation amplitude

    Time frame: Day 0 to 3

    Assess the required stimulation amplitude measured in milliamps (mA) to improve airflow during stimulation as assessed by direct visualisation of the amplitude.

  3. Feasibility of participant recruitment and retention

    Time frame: Day 0 to 30

    Demonstration of participant recruitment and retention rates for a POC target stimulation in OSA participant study, measured by direct participant recruitment numbers and during on study.

Secondary outcomes

  1. Acute increase in airflow measured during target stimulation

    Time frame: Day 0 to 3

    Demonstration of acute increase in airflow when stimulating the HGN or GG in combination with the AC or strap muscles during a flow limited event (hypopnea or apnea), measured in liters per second (L/s) using pneumotachometer.

  2. Assessment of acute airway opening during target stimulation

    Time frame: Day 0 to 3

    Demonstration of changes in acute cross-sectional airway opening measured under nasoendoscopy when stimulating two functional targets simultaneously (i.e., the HGN and AC). Video imaging and physician interpretation of nasoendoscopic images will be used to review outcome measures.

  3. Assessment of sub-acute airflow increase and/or AHI reduction during target stimulation during a sleep study.

    Time frame: Day 0 to 3

    Demonstration of in sub-acute flow increase and/or AHI reduction when stimulating two functional targets simultaneously during sleep as measured with polysomnography (PSG), measured in liters per second (L/s) using pneumotachometer.

Sponsors and collaborators

Lead sponsor

Invicta Medical Inc.

Industry

Collaborators

  • Adelaide Institute for Sleep Health
  • Flinders University
  • The University of Western Australia

Registry information

Official study title

Multicenter Proof-of-Concept Study to Investigate the Feasibility and Respiratory Effects of Stimulating Two Functional Targets (Neural and/or Muscular) for the Treatment of Obstructive Sleep Apnea

Important dates

Study start
2023
Primary completion
2025
Study completion
2025
First posted
Oct 4, 2024
Registry last updated
Jun 8, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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