Evaluation of an Algorithm to Detect Sleep and Wake in Continuous Positive Airway Pressure (CPAP) (PBSW)
The purpose of this engineering trial is to develop and validate an algorithm that will deliver Paced Breathing as a ramp feature to obstructive sleep apnea (OSA) subjects using Continuous Positive Airway Pressure (CPAP) therapy. In this trial the investigators will be evaluating the algorithm's ability to correctly distinguish between sleep and wake.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
|Official Title:||Evaluation of an Algorithm to Detect Sleep and Wake in Continuous Positive Airway Pressure Users Using Paced Breathing|
- Sleep/Wake Algorithm [ Time Frame: The performance of the algorithm will be evaluated in real time while the subject is wearing the device during the sleep study, an average of 08 hours. ] [ Designated as safety issue: No ]We tested the ability of the Sleep/Wake algorithm to identify sleep an wake periods with precision, as compared to standard polysonography (PSG) measures, which was used as the gold standard, i.e. we tested the accuracy of the algorithm. Accuracy was defined as the proportion of true results (both true positives and true negatives)in the population and it was assesed using as 2 X 2 table, i.e. accuracy = number of true positives + number of true negatives/ number of true positives + false positives + false negatives +true negatives. where True positive = the algorithm tested correctly identified sleep, False positive = the algorithm tested incorrectly identified sleep, True negative = the algorithm tested correctly rejected awake periods, and False negative = the algorithm tested incorrectly rejected awake periods.
|Study Start Date:||October 2009|
|Study Completion Date:||September 2010|
|Primary Completion Date:||September 2010 (Final data collection date for primary outcome measure)|
Experimental: Paced Breathing Sleep/Wake detection
All subjects enrolled will have oobstructive sleep apnea (OSA) and will be current Continuous Positive Airway Pressur (CPAP) users.
Device: Paced Breathing
The Paced Breathing (PB) feature(when activated) will work to relax the user and help them fall asleep by encouraging them to take deep slow breaths until they reach 10 breaths (or less) per minute. The feature will also detect when the subject has fallen asleep so the Continuous Positive Airway Pressur (CPAP) device will automatically switch from PB mode to regular CPAP mode.
Other Name: Respironics
|United States, Massachusetts|
|Boston, Massachusetts, United States, 02135|
|Principal Investigator:||David P White, M.D||Philips Respironics|