Ambulatory polysomnography

Vitaport 4 Ambulatory PSG recorder

Channels 1-10

Type

AC-coupled common reference

EEG/EOG/EMG

AC Input Range	5000 µVpp
DC Input Range	> ± 200mV (Ag/AgCl electrodes recommended)
Low pass filter	70 Hz, 2nd order butterworth
High pass filter	0,3 Hz (TC = 0,53S.), 1st order RC
Noise	< 0,5 µV RMS, 0.1 - 70 Hz
CMRR	> 120 dB (1 - 60 Hz) with driven neutral
Input impedance	> 100 MΩ
Sample rates	128 Hz
Resolution	16 bits
Time skew	Synchronous sampling

Nasal pressure

AC nasal pressure derived from nasal pressure sensor for:

nasal pressure cannula
CPAP mask pressure

Input range: ± 25mbar	Sample rate: 32 Hz
Time constant: 6 sec	Low pass: 4 Hz

Snore from NP

AC snore channel derived from nasal pressure sensor

Input range: ± 100%	Sample rate: 128Hz
High pass: 4 Hz

CPAP pressure from NP

DC CPAP pressure channel derived from nasal pressure sensor

Input range: ± 25mbar	Sample rate: 4 Hz
Low pass: 0.028 Hz

Flow

Flow channel by thermo-couple sensor

Input range: ± 0,5 mV	Sample rate: 64 Hz
Time constant: 3 sec	Low pass: 15 Hz

Chest excursions

Respiratory Inductive Plethysmography or Piezo electrical

Abdomen excursions

Input range: ± 2,5 mV	Sample rate: 64 Hz
Time constant: 3 sec	Low pass: 15 Hz

Body Position

Built-in sensor for supine, right, prone, left and up positions

Input range: 0 - 1 V	Sample rate: 4 Hz
Time constant: DC	Low pass: 30 Hz

ECG (1, 2, 3)

ECG/EMG/ExG channels (can also be used for EMG, snoring, activity sensors)

Input range: ± 5 mV	Sample rate: 128 Hz
Time constant: 0,3 sec	Low pass: 100 Hz
CMRR: > 100 dB

Snore piezo-electrical

Via ECG/EMG/ExG amplifier

Activity

Via ECG/EMG/ExG amplifier

SpO2

Oxygen saturation via serial Nonin XPOD adapter

Sample rate: 4 Hz

Pulse Waveform

Pulse waveform via serial Nonin Xpod adapter

Sample rate: 128 Hz

Pulse rate

Sample rate: 4 Hz

Event marker channel

The "ON" button can be used as marker in channel.

Sample rate: 4 Hz

Battery monitoring

Internal continuous battery monitoring channel

Sample rate: 4 Hz

Resolution A/D conv.

16 bits

Dimensions and weight

70 x 122 x 25 mm

145 gram

Battery

Internal rechargeable Lithium Ion polymer

Recording duration

> 24hours on one battery charge

Connectors

1 connector to the sensors

1 connector to amplifier box

2 connectors to serial interfaces (computer)

1 connector for battery charger/DC-adapter

Storage

Flash card storage in EDF format

Quality system

Certification: conform Directive 93/42/EEC CE0197

Standards: IEC 60601-1

Sleep