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Complex Sleep Apnea Syndrome (CompSAS) Resolution Study (CompSAS)

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: June 8, 2009
Last Update Posted: February 28, 2013
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.
Mayo Clinic
Information provided by (Responsible Party):
The purpose of this study is to determine whether adaptive servo-ventilation (ASV) or continuous positive airway pressure (CPAP) is better at treating complex sleep apnea over time.

Condition Intervention
Complex Sleep Apnea Syndrome Device: VPAP Adapt SV

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Is Adaptive Servo-Ventilation Therapeutically More Effective Than Continuous Positive Airway Pressure In Treating Complex Sleep Apnea Syndrome?

Resource links provided by NLM:

Further study details as provided by ResMed:

Primary Outcome Measures:
  • Apnea-hypopnea Index (AHI) Per Polysomnography (PSG) at the End of Treatment Period [ Time Frame: 3 months ]
    AHI refers to the number of apneas and hypopneas that occurred per hour of sleep

Secondary Outcome Measures:
  • Quality of Life Measured by the Sleep Apnea Quality of Life Index (SAQLI) [ Time Frame: 3 months ]
    Likert scale measured from 0-7. The minimum important difference a change of 0.5 when a 7-item Likert scale is used. 0 represents the most negative response, 7 represents the most positive response.

Enrollment: 66
Study Start Date: May 2009
Study Completion Date: December 2011
Primary Completion Date: October 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: ASV mode Device: VPAP Adapt SV
Comparison of ASV and CPAP modes
Active Comparator: CPAP mode Device: VPAP Adapt SV
Comparison of ASV and CPAP modes

Detailed Description:
Between 3 and 19% of patients with clinical and polysomnographic features of obstructive sleep apnea syndrome (OSA) develop a high-frequency of central apneas and/or disruptive Cheyne-Stokes respiratory syndrome after application of continuous positive airway pressure (CPAP), a pattern called the complex sleep apnea syndrome (CompSAS). The trial seeks to determine the efficacy of the ASV vs. CPAP modes for the treatment of CompSAS over time. Baseline clinical and laboratory data will be collected, patients will be randomized to one of the two treatments. Overall study participation is approximately 3 months.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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

Inclusion Criteria:

  • Diagnosis of complex sleep apnea syndrome (CompSAS)
  • Naive to PAP therapy
  • Requires CPAP ≤15 cm H2O

Exclusion Criteria:

  • Requires supplemental oxygen or with a baseline SaO2 <90%
  • Requires CPAP > 15 cm H2O
  • Primary diagnosis of moderate to severe chronic obstructive pulmonary disease, neuromuscular disease, chronic hyperventilation, stroke, cognitive impairment, such that could impair ability to answer subjective questions (study questionnaires) or unstable heart failure
  • Any contraindication for nasal or oro-nasal positive airway pressure, such as claustrophobia, severe nasal obstruction, or impaired mental status
  Contacts and Locations
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 ClinicalTrials.gov identifier (NCT number): NCT00915499

United States, Arizona
REM Medical
Phoenix, Arizona, United States, 85037
United States, Illinois
Northwestern University
Chicago, Illinois, United States, 60611
NorthShore University Health System
Skokie, Illinois, United States, 60077
United States, Minnesota
Mayo Center for Sleep Medicine, Mayo Clinic
Rochester, Minnesota, United States, 55905
United States, Pennsylvania
Center for Sleep Medicine
Lafayette Hill, Pennsylvania, United States, 19444
United States, South Carolina
SleepMed of South Carolina
Columbia, South Carolina, United States, 29201
Sponsors and Collaborators
Mayo Clinic
Principal Investigator: Timothy I Morgenthaler, MD Mayo Sleep Disorders Center
  More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: ResMed
ClinicalTrials.gov Identifier: NCT00915499     History of Changes
Other Study ID Numbers: CA-01-08
First Submitted: June 4, 2009
First Posted: June 8, 2009
Results First Submitted: December 10, 2012
Results First Posted: February 22, 2013
Last Update Posted: February 28, 2013
Last Verified: February 2013

Additional relevant MeSH terms:
Sleep Apnea Syndromes
Pathologic Processes
Respiration Disorders
Respiratory Tract Diseases
Signs and Symptoms, Respiratory
Signs and Symptoms
Sleep Disorders, Intrinsic
Sleep Wake Disorders
Nervous System Diseases