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Bluetooth Communication Interface for EEG Signal Recording in Hyperbaric Chambers.

Lucio Pastena, Emanuela Formaggio, Fabio Faralli

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |January 22, 2015
    PubMed
    Summary

    Wireless Bluetooth technology enables electroencephalographic (EEG) recording inside hyperbaric chambers, overcoming signal interference and safety issues. This system successfully measured divers' brain activity under hyperbaric conditions, assessing oxygen's effects.

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    Area of Science:

    • Biomedical Engineering
    • Neuroscience
    • Hyperbaric Medicine

    Background:

    • Recording biological signals in hyperbaric chambers presents significant technical, practical, and safety challenges due to electromagnetic interference and spark hazards.
    • Traditional wired systems are susceptible to eddy currents and signal attenuation within Faraday cage-like environments.
    • Advancements in wireless technology offer potential solutions to these recording limitations.

    Purpose of the Study:

    • To design and implement a wireless Bluetooth system for electroencephalographic (EEG) recording within a hyperbaric chamber.
    • To assess the feasibility of transmitting EEG signals wirelessly from inside a hyperbaric environment.
    • To investigate the effects of hyperbaric oxygen exposure on brain bioelectrical activity in professional divers.

    Main Methods:

    • Development and implementation of a Bluetooth-based system for in-vivo EEG data acquisition inside a hyperbaric chamber.
    • Wireless transmission of amplified EEG signals, mitigating eddy current interference.
    • Analysis of EEG spectral power using Fast Fourier Transform (FFT) and cortical source localization via Low-Resolution Brain Electromagnetic Analysis (LORETA).

    Main Results:

    • The implemented Bluetooth system successfully recorded amplified EEG signals inside the hyperbaric chamber without interference.
    • EEG data was transmitted wirelessly, demonstrating the feasibility of the proposed technology.
    • Analysis revealed changes in EEG spectral power and cortical source activity under hyperbaric oxygen conditions compared to baseline and post-decompression states.

    Conclusions:

    • Wireless Bluetooth technology provides a viable solution for overcoming the challenges of EEG recording in hyperbaric environments.
    • The system enables online, interference-free recording and transmission of brain activity.
    • This technology facilitates the study of physiological and neurological responses to hyperbaric conditions, such as oxygen exposure in divers.