Alice PDx

Portable sleep diagnostic system

The Alice PDx portable diagnostic recording device is intended for Obstructive Sleep Apnea screening, follow-up and diagnostics in polysomnography and sleep disorder studies. Patients can be tested in the hospital or at home.

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Specifications Show all

Physical characteristics
Size
5 L x 3 W x 2 H (12.7 x 7.62 x 5.08) "/cm
Weight
Approximately 8 oz (230 grams), weight does not include batteries
Channels
Total channels
Up to 21 with Optional EXG and ExG Yokes channels
Standard channels
Pressure Based (w/snore) and Thermal Airflow, zRIP Effort (2), Body Position, SpO2 (also Pleth and Pulse Rate), Respironics Therapy Device Parameters, Pressure and Flow from non-respironics therapy devices. channels
Optional Yokes/Channels (a)
ECG Yoke; 3-lead ECG providing 3 measured and 4 derived channels for a total of 7 channels
Optional Yokes/Channels
ExG Yoke: 4 Neuro Channels (EEG or EOG) and 3 Differential EMG, plus references and ground.
Input impedance
ECG
10 Mω per Electrode 20 Mω differential
EMG
2 Mω per Electrode 4 Mω differential
EEG
2 Mω per Electrode 4 Mω differential
Bandwidth
ECG (a)
0.318 to 81 Hz
EEG b
0.318 to 35 Hz
EMG a
9.7 to 86 Hz
Input Signal Range
ECG b
± 4 mV
EEG c
± 500 µV
EEG d
± 150 µV
Digital Resolution
Up to
16 bits
Initial Sample Rate
Up to
1 Hz
Max Storage Rate
ECG/ExG
200 Hz
Effort and Thermal Flow
100 Hz
Pressure Flow
200 Hz
Snore
500 Hz
Body Pos.
1 Hz
Communication interfaces
Serial Protocol
USB PC cable
SleepLink and Serial
communication cables for our therapy devices
System Power Requirements
Alkaline batteries
Three AA (1.5V) 0.43 watts typical