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Auto Continuous Positive Airway Pressure (CPAP) Based Energy Spectrum Analysis of Flow for Treatment of Obstructive Sleep Apnea Hypopnea Syndrome (OSAHS)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00750165
Recruitment Status : Completed
First Posted : September 10, 2008
Results First Posted : April 9, 2019
Last Update Posted : April 9, 2019
Information provided by (Responsible Party):
Fisher and Paykel Healthcare

Brief Summary:
Nasal Continuous Positive Airway Pressure (CPAP) is the standard therapy for obstructive sleep apnea hypopnea syndrome (OSAHS). This is most commonly administered as a single positive pressure that has been individualized for the patient to prevent obstructive respiratory events. However, the therapeutic pressure may vary by sleep stage and body position within a single night and may change over the course of several nights. One approach to dealing with this variability is the use of automatically adjusting CPAP that responds to patient breathing patterns with alterations in the delivered pressure. This study is designed to determine the effectiveness of using the energy spectrum analysis of flow signals to automatically adjust CPAP pressure and improve sleep variables. Thirty subjects who require CPAP will be recruited from the NYU sleep disorders center. Following diagnostic studies (either split night or full night) the subject will undergo a night of treatment with the Fisher and Paykel Healthcare AutoPAP. Efficacy of treatment will be evaluated based on normalization of sleep disordered breathing while treated with the AutoPAP.

Condition or disease Intervention/treatment Phase
Sleep Apnea, Obstructive Device: SleepStyle 200 Auto Series CPAP Humidifier Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 32 participants
Allocation: N/A
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Auto CPAP Based Energy Spectrum Analysis of Flow for Treatment of Obstructive Sleep Apnea Hypopnea Syndrome.
Study Start Date : May 2007
Actual Primary Completion Date : January 2008
Actual Study Completion Date : January 2008

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Sleep Apnea

Arm Intervention/treatment
Experimental: Titration Night
Treatment with the Fisher & Paykel Sleep Style 200 Auto CPAP device
Device: SleepStyle 200 Auto Series CPAP Humidifier
The device is a standard CPAP machine with a built in computer controller that incorporates software for evaluation of the flow signal obtained from the CPAP machine
Other Name: HC254

Primary Outcome Measures :
  1. Apnea Hypopnea Index (AHI) [ Time Frame: 1 night ]
    The Apnea Hypopnea Index (AHI) measure of severity of Obstructive Sleep Apnea (OSA). It is a calculation of the number of apnea events and the number of hypopnea events divided by the total sleep time. Mild OSA is characterized between 5-15 events per hour. Moderate OSA is characterized as 15-30 events per hour. Severe OSA is characterized as greater than 30 events per hour.

Secondary Outcome Measures :
  1. Percent of Time With Less Than 90% Oxygen Saturation [ Time Frame: 1 Night ]
    Oxygen saturation is a measurement of the amount of oxygen present in the blood. An oxygen saturation of less than 90% is considered low, resulting in hypoxemia. Normal blood oxygen level is considered between 95-100%.

  2. Respiratory Disturbance Index (RDI) [ Time Frame: 1 Night ]
    Similar to AHI, the RDI is a calculation of the total number of respiratory disturbances in sleep. The calculation includes apneas and hypopneas, but also includes respiratory effort related arousals.

  3. Arousal Index (AI) [ Time Frame: 1 Night ]
    The Arousal Index is a calculation of the frequency of awakenings per hour of sleep. The higher the number, the more awakenings per hour.

Information from the National Library of Medicine

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

Inclusion Criteria:

  • AHI >15 on the diagnostic portion of the study
  • >18 years of age

Exclusion Criteria:

  • Significant Central Apnea
  • Congestive Heart Failure
  • Inability to give informed consent
  • Patient intolerance to CPAP
  • Anatomical or physiological conditions making CPAP therapy inappropriate

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00750165

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United States, New York
NYU Sleep Disorders Center
New York, New York, United States, 10016
Sponsors and Collaborators
Fisher and Paykel Healthcare
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Principal Investigator: David M Rapoport, MD NYU School of Medicine
Additional Information:
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Responsible Party: Fisher and Paykel Healthcare Identifier: NCT00750165    
Other Study ID Numbers: OSA CPAP; 254 Validation, NYU
First Posted: September 10, 2008    Key Record Dates
Results First Posted: April 9, 2019
Last Update Posted: April 9, 2019
Last Verified: March 2019
Keywords provided by Fisher and Paykel Healthcare:
Obstructive Sleep Apnea
Continuous Positive Airway Pressure
Additional relevant MeSH terms:
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Sleep Apnea Syndromes
Sleep Apnea, Obstructive
Respiration Disorders
Respiratory Tract Diseases
Signs and Symptoms, Respiratory
Sleep Disorders, Intrinsic
Sleep Wake Disorders
Nervous System Diseases