Table 1.
Overview and characteristics of known subscalp EEG devices certified or currently in development for humans.
| Company | Device | Channels/montage | EEG sampling rate | Battery | Wearable companion | Continuous raw data available | Status |
|---|---|---|---|---|---|---|---|
| UNEEG medical | 24/7 EEG™ SubQ | 2 channels/unilateral (but implantation of 2 devices for bilateral recording possible) | 207 Hz | External/24 h rechargeable | Yes; the small external device receives and stores the measured EEG signals and is capable of 30+ days storage of EEG data | Yes; the implanted needle electrode can be used for up to 15 months | European CE approval in 2019; FDA approval pending |
| Epi-Minder | Minder™ | 2 channels/bilateral | 250 Hz | External/24 h rechargeable | Yes | Yes | Clinical trials ongoing |
| Wyss Center | Epios™ | 7 channels/temporal OR 14 channels/bitemporal OR 28 channels/full montage | 250 Hz | External/24 h rechargeable | Yes | Yes | Clinical trial underway |
| BrainCare Oy | UltimateEEG™ | 1 or 2 channels/unilateral up to 8 channels/unilateral | 256 Hz | Internal/1 year; external/24 h rechargeable | Packaged into a unit behind the ear | No; only relevant epochs | Clinical trial announced |
| Neuroview Technology | 1 or 2 channels/unilateral | 256 Hz | Internal/1 year | No | No; only relevant epochs | Clinical trial announced |
Based on Duun-Henriksen et al. (35) and data provided by the manufacturers. “?” indicates that data are not yet disclosed. To our knowledge, none of these devices has been used in epileptic dogs, yet.