A new study has demonstrated the potential benefits of using motion sensors linked to an online database, as a means of tracking seizures among people with epilepsy.
Conducted by the Stanford University School of Medicine, the research aimed to determine the feasibility of detecting and recording generalised tonic-clonic seizures (GTCS) through the use of a biosensing wrist accelerometer linked to an online seizure database.
Currently, the clinical management of epilepsy and epilepsy therapy trial methods are heavily reliant on paper or electronic diaries, meaning inaccurate self-reported seizure frequency data is often used to inform key treatment decisions.
In this trial, a total of 62 participants were enrolled and given a wristwatch accelerometer that detected shaking. Data was transmitted via Bluetooth to a bedside electronic tablet and then via Wi-Fi to an online portal. The watch recorded the date, time, audio, duration, frequency and amplitude of events.
Events logged by the watch and recorded in a bedside paper diary were measured against video electroencephalogram (vEEG) results, which are considered the gold standard for tracking accuracy.
According to the results, published in the medical journal Seizure, a total of 62 seizures were recorded on vEEG, of which 31 were convulsive and 31 non-convulsive. Twelve patients had a total of 31 convulsive seizures and, of those, ten had 13 GTCSs.
The watch was able to capture of 92.3% of GTCS, and audio recordings shown to be consistent with seizures in 91.6% of cases. Data was successfully transferred to the bedside tablet in 91.6% instances and to the online database 83.3% of the time.
Although 81 false positives were generated by the watch, 51% were cancelled by the patients. It was also shown that patients and caregivers only provided verbal reports of 24.2% of the seizures, none of which were recorded on the paper logs.
The research concludes: “Automatic detection and recording of generalised tonic-clonic seizures to an online database is feasible and may be more informative than seizure logging in a paper diary.”
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NB: The image on this page is not a representation of the product used in this study.