Self-contained EEG recording system
Disclosed systems include a self-contained electroencephalogram (EEG) recording patch comprising a first electrode, a second electrode and wherein the first and second electrodes cooperate to measure a skin-electrode impedance, a substrate containing circuitry for generating an EEG signal from the measured skin-electrode impedance, amplifying the EEG signal, digitizing the EEG signal, and retrievably storing the EGG signal. The patch also comprises a power source and an enclosure that houses the substrate, the power source, and the first and second electrodes in a unitary package.
1. A self-contained electroencephalogram (EEG) recording patch adapted to be worn by a user, comprising:
a patch housing that encloses:
a substrate having a power source; a single pair of measuring electrodes; a memory; and circuitry disposed thereon;
an I/O port that provides a physical interface for communication between the memory and an external device;
the patch housing including a surface having apertures for the single pair of measuring electrodes and the I/O port; and
a sticker including hydrogel adapted to reversibly attach to the surface of the patch housing and reversibly attach the patch to a scalp of the user;
wherein:
in an attached condition, the sticker completely covers the I/O port; and
in a detached condition, the sticker is removed from the surface of the patch housing;
the circuitry, after activation of the patch, is configured to use the power source to enter the patch into a disconnected, continuous recording state for recording, using the single pair of measuring electrodes, EEG data into the memory for a time period lasting at least 12 hours, wherein:
in the disconnected, continuous recording state, the patch is in the attached condition and the EEG data is not transmitted to the external device; and
in a connected, non-recording state, the patch is in the detached condition and the circuitry is configured to communicate the EEG data to the external device using the I/O port.
2. The patch of claim 1 , comprising a plurality of replaceable stickers adapted to reversibly attach to the surface.
3. The patch of claim 1 , wherein the patch does not include a wireless communication mechanism.
4. The patch of claim 1 , wherein the time period lasts up to 170 hours.
5. The patch of claim 1 , wherein the circuitry performs an impedance check, using the single pair of measuring electrodes, prior to entering into the disconnected, continuous recording state.