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Neuromodulation Therapy Device for the Treatment of Sleep Apnea

This study has been completed.
Dymedix Corporation
Information provided by (Responsible Party):
John G. Park, Mayo Clinic Identifier:
First received: February 8, 2010
Last updated: May 26, 2013
Last verified: May 2013
We are looking to test a novel device in the treatment of Obstructive Sleep Apnea (OSA). Rather than using positive pressure to open the airways, we are testing a device that delivers an auditory tone to affect neuromodulation. We will test its efficacy in treating OSA while minimizing sleep disturbance. As this device is much less cumbersome to wear, we hope this therapy device will also improve compliance with treatment.

Condition Intervention Phase
Obstructive Sleep Apnea
Device: Neuromodulation Therapy Device (NMTD)
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Neuromodulation Therapy Device for the Treatment of Sleep Apnea

Resource links provided by NLM:

Further study details as provided by Mayo Clinic:

Primary Outcome Measures:
  • We will determine effective device settings on the Neuromodulation Therapy Device (NMTD). [ Time Frame: First year ]

Secondary Outcome Measures:
  • We will compare the modified NMTD's efficacy and tolerability to that of CPAP in treating OSA. [ Time Frame: Second year ]

Enrollment: 18
Study Start Date: February 2010
Study Completion Date: December 2011
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: NMTD adjustment testing
We will determine effective NMTD device settings for reducing AHI.
Device: Neuromodulation Therapy Device (NMTD)
Subjects will have an overnight PSG using the NMTD. This device detects reduced airflow via a polymer sensor. When such event is detected, a short burst of sound is administered via earphones. We will determine NMTD's operating characteristics for treatment of OSA. The optimal duration of a detected apnea/hypopnea event before NMTD responds must first be determined. Additional adjustable features include sensitivity of respiratory event sensor, as well as pulse duration, frequency, and intensity of the delivered auditory tone. Since independent adjustment of each of the 4 parameters is not feasible, our screening analysis will test two variables at a time to identify which variables most effectively reduce AHI.
Active Comparator: CPAP vs NMTD device
We will randomly assign previously titrated CPAP vs. NMTD to each subject then compare the resultant AHI between the two devices.
Device: Neuromodulation Therapy Device (NMTD)
Subjects will have an overnight PSG using CPAP (as previously titrated) for half of the night and NMTD the other half (this order will be randomized). we will monitor NMTD's influence on Apnea Hypopnea Index (AHI), sleep architecture, arousal index, and sleep efficiency compared to the same variables during CPAP use
Active Comparator: NMTD efficacy and tolerability
Subjects will undergo two sequential nights of PSG with NMTD to evaluate if there is any stimulus-response extinction over time.
Device: Neuromodulation Therapy Device (NMTD)
Subjects will undergo two sequential nights of PSG with NMTD to evaluate if there is any stimulus-response extinction over time.

  Show Detailed Description


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Subjects 18 years or older
  • Completed a comprehensive Sleep Medicine evaluation and a standard split-night polysomnogram
  • Able to give informed consent
  • Confirmed diagnosis of OSA
  • Positive airway pressure device naive

Exclusion Criteria:

  • Unsuccessful CPAP titration
  • Inability to detect screening tone in either ear without the use of hearing aid
  • Inability to tolerate a 37 dB tone
  • Need for nocturnal oxygen or non-invasive positive pressure ventilation due to hypoventilation/hypercapnia
  • Predominantly mixed or central apneas or those who develop complex sleep apnea during the PSG
  • Neurologic disorders such as seizure disorder or narcolepsy
  • Psychiatric disorders currently not under adequate control
  • Need for nurse or other's assistance during the night due to problems of nocturnal confusion, delirium, or other conditions that would preclude the subject from wearing the device all night
  • Pregnancy (will be tested)
  Contacts and Locations
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Please refer to this study by its identifier: NCT01117064

United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55905
Sponsors and Collaborators
Mayo Clinic
Dymedix Corporation
Principal Investigator: John G. Park, M.D. Mayo Clinic
  More Information

Responsible Party: John G. Park, MD, Mayo Clinic Identifier: NCT01117064     History of Changes
Other Study ID Numbers: 09-006804
Study First Received: February 8, 2010
Last Updated: May 26, 2013

Keywords provided by Mayo Clinic:
Sleep Apnea

Additional relevant MeSH terms:
Sleep Apnea Syndromes
Sleep Apnea, Obstructive
Respiration Disorders
Respiratory Tract Diseases
Signs and Symptoms, Respiratory
Signs and Symptoms
Sleep Disorders, Intrinsic
Sleep Wake Disorders
Nervous System Diseases processed this record on May 22, 2017