EEG/ERP System

medical EEG protable ERP EEG/ERP system medical equipments medical supplier medical devices surgical equipment

   Nation 7128W-D24-E, Nation 7128W-D36-E Nation 7128W-D48-E, Nation 7128W-D60-E

Specifications

For Type-D Amplifier

²Input channels: 24/36/48 Monopolar EEG; 12channels Bipolar EEG

²Power supply: Internal rechargeable lithium battery(16.8v); External charger input: AC100~240V, output DC 19V

²Connection to PC: USB (HDMI interface) cable

²Operation Modes: Real-time

²A/D conversion: 24 bit

²Sampling Rate: 128/256/512/1024/2048/4096/8192Hz

²Input impedance: ≥10MOhm

²CMRR: ≥100dB

²Noise: ≤0.5uVRMS

²Low-pass filter: 0-120Hz

²Amplitude-frequency characteristic: 1-60Hz

²High-pass filter: 0.01-0.3s

²Interface: USB2.0 (USB1.1), interface transfer rate: 480Mb (/ 12Mb) / s

²Dimension & Weight: 300*230*60(mm); 1.65Kg (amplifier only)

For Stimulator (ERP Part)

2.1    A/V stimulator

2.1.1            Normal type sound stimulation parameter

²Stimulation type: Short tone,Pure tone,White noise;

²Stimulation mode of short tone:Left-ear,Right-ear,Binaural, Alternate;

²Phase of short tone stimulation:rare wave, dense wave, alternative wave;

²The maximum short tone intensity:≥130dB

²The maximum pure tone intensity:≥120dB

²The maximum white noise intensity:≥100dB

²Stimulation Frequency: 0.1~100Hz, error ≤±10%

²Pure tone sound frequency:250~7KHz, error ≤±10%

²Pure tone stimulation modes:Left-ear, Right-ear, Binaural,Alternate

²Target signal probability:5%~100%, error ≤±10%

2.1.2            Video output signal

²Checkerboard images, Bar grid images,vertical grid images

²Grids number:4*4~64*32

²Output control:Full-screen,Half-screen(top,bottom,left,right),1/4 screen (I, II, III, IV quadrant display)

2.2    Current stimulator

²Maximum current pulse output intensity:100mA

²Pulse output frequency:0.1Hz ~ 100Hz

²Stimulator modes: Single-stimulator mode, Dual-current stimulator mode

2.3    Photic stimulator

²Stimulation frequency: 0.1~30Hz,error ≤±10%

²Flash time:1~50 minutes

Application

EEG/ERP is used in clinics or research labs by emitting 2 different stimulation signals (one Target signal and a non-Target signal) to the person wearing the equipment. The doctor/researcher then analyzes the reaction of the person towards the signals emitted based on the change in the person’s EEG waveforms and compare them to EEG waveforms of patients with neuropsychopathic disorders such as schizophrenia, ADHD and mental retardation, to determine if the person has the said symptoms. In addition, the EEG/ERP system is used to test the degree of concentration amongst teenagers.      

Key Features & Advantages

Professional EEG amplifier suitable for all standard applications of routine EEG and long term EEG monitoring in the research and clinical areas. Configurable in a number of setups according to user’s needs:

u24/36/48/60 channels monopolar EEG;

u24/36/48 channels monopolar EEG + 12 channels bipolar EEG;

u24/36/48 channels monopolar EEG + 12 channels bipolar EEG + ERP examination with Acoustic & Visual stimulator, consisting of three stimulation functions (sound, light and electricity) which can be configured with special earphones and VEP monitor.

24 bits A/D conversion rate, with high sampling rate of up to 8 kHz.High quality real-time EEG signal acquisition is transmitted via fiber optical isolation, which shields away interference from power line and other signals, transmitting stable and reliable measurement data at high-speed while greatly ensuring patient’s safety. Amplifier can be operated either by DC power without affecting signal quality.Head-box design to access single shielded cup/clip electrodes with touch proof connectors (1.5mm).Built-in impedance testing function and automatic calibration (for both sine wave and square wave signals).Optional video system for recording, editing and displaying video images synchronously with EEG signals.

Software Functions

Acquisition & Settings

uColors of waveforms are in accord to colors of events, and users can mark on the waveforms with character directly; it’s available to open respiration leading sound to instruct patient's respiration frequency in a deep respiration event;

u EEG channels can be arbitrarily set up for users to customize the layout of channels during collection process and playback analysis. This includes the choice of processing EEG waveforms with filters, baseline and other arbitrary parameters;

uConfiguration chart display and data source of physical channel configuration are displayed together at the same interface, making channel editing simpler and more intuitive;

uEvents markers enable user to mark timings of seizures or any abnormal wave occurrences during recording, whereby events marked are listed and can be traced with the event localization feature during playback;

uSound, light and electricity evoking is available during ERP data acquisition, and different evoke methods can be applied to different patients to extract evoking waveform;

uSuperposition of ERP waveforms eliminates clutter and reserve EP data clearly;

uSuperposition of different event EP waveforms according to event's classification setting;

u Same-screen, and real-time display brain tendency chart is in synchronism with EEG waveforms acquisition. Brain tendency chart include various energy curve maps: energy curve, peak value frequency, relative energy, absolute energy, energy peak frequency, medium frequency index, side frequency index and coma index.

Replay & Analysis

uEEG mapping;

uEEG tendency analysis;

uEEG spectral analysis;

u Brain waves fast playback and fast positioning function;

uAutomatic spike recognition with adjustable arbitrary spike-wave parameters;

uERP data averaging function;

EEG/ERP System