The type of data collected from the device is determined by the device model.

Basic Usage Data devices measure and report patterns of use along with therapy settings, including pressure, pressure relief and humidification. The device identifies patient therapeutic use when the blower is on and breathing is detected via a flow sensor.

Advanced Compliance Data devices monitor and report on patterns of use along with abnormal events that may impact the efficacy of the therapy. These events include apnea, hypopnea, snore, flow limitation, non-responsive apneas and large leak. The device identifies these abnormal breathing events via an advanced algorithm that uses both flow data and pressure data inputs generated by the flow sensor and pressure sensor of the device.

Below is a basic explanation on how these events are calculated.Apnea Detection - The Respironics REMstar algorithm establishes a baseline of patient flow based on a moving flow signal window - it detects an apnea as an 80% reduction in flow lasting at least 10 seconds.

Hypopnea Detection - The Respironics REMstar algorithm establishes a baseline of patient flow based on a moving flow signal window - it detects a hypopnea as a 40% reduction in flow lasting at least 10 seconds, followed by a recovery breath.

Snore Detection - Snoring is a measure of partial airway occlusion and is a strong indicator of potential respiratory events. The Respironics REMstar algorithm has the capability to detect snoring vibrations and adjust the pressure accordingly.

Flow Limitation - The Respironics REMstar algorithm analyzes the flatness, roundness, peak and shape of each breath throughout the night and determines a gross change in these characteristics as a flow limitation.

Non-Responsive Apnea / Hypopnea - At higher pressures, if a patient does not respond to pressure increases due to apneas or hypopneas, the device will automatically convert to a CPAP for a 15-minute period and an NRAH notification will be conveyed to Encore.