Overview - Itamar Medical OM2196470 Operation Manual

Itamar Medical Ltd.
2.

OVERVIEW

The WatchPAT is a wearable device, worn on the wrist, that is utilizing a plethysmographic
based finger–mounted probe that measures the PAT™ (Peripheral Arterial Tone) signal. The
PAT™ signal is a measurement of the pulsatile volume changes in the fingertip arteries which
reflects the relative state of the arterial vasomotor activity, and thus indirectly the level of
sympathetic activation. Peripheral arterial vasoconstriction, which mirrors sympathetic
activation, is shown as attenuation in the PAT™ signal amplitude.
The Finger Probe also measures RED and IR (Infra-Red) signals, which are used for the
measurement of SpO2 signal.
In the WatchPAT™ONE with a chest sensor, the Snoring, Body Position and the subject's chest
movement signals are recorded by the integrated Chest Sensor.
The recorded data is transmitted to an Application on a mobile phone and is then stored on a
Web Server.
Following the sleep study, the recordings are automatically downloaded from the Web Server
and analyzed in an offline procedure using the proprietary zzzPAT software.
The zzzPAT algorithms use the WatchPAT channels for the detection of sleep related breathing
disorders, sleep staging (Rapid Eye Movement (REM), Light Sleep, Deep Sleep and Wake).
The zzzPAT also includes detection of cardiac arrhythmia as additional information to its
sleep indices. For further identification of central apnea, the respiratory movement channel
generated from the RESBP sensor is used in the zzzPAT algorithm in addition to the other
channels. The zzzPAT uses WatchPAT's snoring and body position channels to generate
snoring level and body position discrete states.
The software issues comprehensive reports of the study, with statistics and graphic
presentation of the results. The night data can be viewed and the automatically detected
events can be revised manually.
WatchPAT™ONE System 16 Operation Manual