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Recording a 16-channel EEG and a 1-channel ECG

Routine EEG, вevoked potentials, videomonitoring

Saving, review, analysis and results storing and automatic EEG description

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General Information

TOV NVP “DX-Systems” produces electroencephalography hardware-software devices of BRAINTEST series, equipped with multifuntional software, special digital EEG-monitoring functions, long-latency auditory and visual evoked potentials examination function and simultaneous one standard lead ECG recording.

Registering an Electroencephalogram

BRAINTEST computer electroencephalography device records 4- to 21-channel EEG and 2-channel EOG with BRAINTEST-24 and 4- to 16-channel in the “10-20” system simultaneous with ECG in one standard lead. EEG is recorded in accordance with examination protocol under the standard monitoring mode, long-term (48 hours nonstop) or under the EEG videomonitoring mode.
With BRAINTEST-24 the quality of electrode montage is controlled automatically in the process of electrode placement and during the whole period of EEG recording.
Amplitude and time EEG scanning during recording and review are available for customisation.
Sound and flash stimulation in the BRAINTEST system is carried out with a photo-phono-stimulator, a pair of glasses and a headset. Stimulus intensity and frequency are set up with software tools.
Advanced digital continuous monitoring is realised with BRAINTEST-VIDEO. Patient video and EEG are recorded simultaneously, including at night with poor light, by using a special video camera and a cap with embedded electrodes. The video is saved to PC hard drive and is easy to process (compress, event mark) and print (by selecting a fragment of the video and electroencephalogram).

Electroencephalogram Processing and Analysing

BRAINTEST software envisages:
• EEG multioptional display and processing – EEG review in leads systems, range filtering, EEG editing and EEG comparison
• a set of EEG analysis methods (based on Fourier or Wavelet transform)
• the building of maps for various analysed data in the selected EEG fragment: frequency ranges power, median spectrum frequency, canonograms, power in all=analysed frequencies, EEG ranges, correlation ratio and coherence ratio.
• a two- and a three-dimensional EEG analysis representation for a better visualisation of maps
The results of cross-correlation, coherent and bispectral analyses are displayed as graphs, diagrams, histograms and tables combined and represented as the doctor decides.
Evoked potentials
For a more indepth examination BRAINTEST registers and analyses long-latency evoked potentials – auditory, visual (including reverse checkerboard pattern) and cognitive (conventionally negative standby wave).
Hear Rate Variability analysis (HRV)
BRAINTEST electroencephalographers are able to analyse heart rate variability according to the methods enlisted below:
time history (statistical) analysis
heart rhythm wave structure analysis
scattergram analysis
Bayevsky’s variational pulsometry.

Building Assessment Report and Printing

The doctor is provided with EEG automatic description as a basis for building the report. The description contains general information on broad-band EEG spectral analysis, EEG post-functional test change dynamics, amplitude-time parameters and amplitude-time parameters and registered curve metric values.
Report narrative can be either prepared in any format the doctor chooses or software-generated and then edited. The templates and the FAQ mode make it possible to quickly build a report of certain length and complexity.
The assessment report sheet layout is arbitrary.
When creating a report the doctor may print out selected areas of the registered EEG and video records and EEG analysis results with any of EEG representations (a map, a graph, a diagram or a histogram).

Data Storing

Software database stores patient cards, registered EEGs, EEG analysis results, reports and textual findings. The doctor decides which fields to fill out in the patient electronic card. EEG-examination data can be saved to archive, a CD or a USB drive, sent to cloud or emailed. The system makes it possible to sort patient details and find cards and individual entries by selected parameters.