Image Credit: UNEEG Medical
UNEEG Medical, headquarters in Allerød, Denmark has developed a subcutaneous electroencephalography system (sqEEG), which is implanted under the scalp behind the ear. The implant acquires EEG signals fro a lead placed in the brain region where seizures are expected to occur. EEG data is then transmitted to an interface placed behind the ear, and downloaded into the patient’s smartphone.
UNEEG reported on a study of ten adults with treatment-resistant epilepsy who wore the device for up to 15 months, collecting over 72,000 hours of brainwave data and detecting 754 seizures. Participants also kept seizure diaries and used fitness trackers to log their health. A comparison of the patient’s reports and the implant data showed that patients had only correctly recorded about 48% of their actual seizures. In contrast, 27% of the episodes logged in the diaries didn’t show any seizure activity at all.
Additionally, the study showed that the device was able to distinguish between convulsive, nonconvulsive with awareness, and nonconvulsive without awareness seizures. The-device based classification was more accurate that through self-reporting. Lastly, most users found the implant unobtrusive and acceptable, with many wearing it for more than 20 hours a day.
UNEEG received the CE mark and launched its EpiSight in September 2024. In June 2025, UNEEG received EU approval for 3-year continuous use of its subcutaneous implant.