New Device Developed to Detect Epileptic Seizures

Overview of Epilepsy and Seizure Risks

A recent study has introduced and assessed the effectiveness of an innovative device designed to detect epileptic seizures and provide a warning system for patients. Despite ongoing medication, around 30% of individuals with epilepsy continue to experience seizures. Nocturnal seizures pose particular dangers as they often go unwitnessed, increasing the risk of sudden unexpected death in epilepsy (SUDEP), a significant cause of mortality among these patients. Moreover, individuals with intellectual disabilities and severe therapy-resistant epilepsy face an estimated 20% lifetime risk of dying from epilepsy. The introduction of an epilepsy warning device aims to enhance patient care and potentially mitigate the risk of SUDEP.

Current Monitoring Techniques

Current monitoring methods for nighttime seizures include sensors that detect vibrations from rhythmic jerking movements. However, these existing techniques frequently fail to identify many seizures. A new device, developed by researchers in the Netherlands, offers a promising solution to reduce the incidence of nighttime deaths among epileptic patients. This advanced device, known as the Nightwatch bracelet, is designed to monitor specific seizure warning signs.

Functionality of the Nightwatch Bracelet

Detection Capabilities

The Nightwatch bracelet was engineered to recognize two critical warning indicators of severe seizures: an abnormally rapid heartbeat and rhythmic jolting movements. Upon detecting these signs, the bracelet alerts the patient’s caregiver or nurse, enabling timely intervention.

Clinical Trial Results

In a recent prospective trial, researchers tested the bracelet on 28 patients with intellectual disabilities and epilepsy, monitoring them for an average of 65 nights. During severe seizures, the bracelet activated an alarm, while video footage was captured to assess the accuracy of the device. The trial’s findings were published in the journal Neurology.

Comparison to Existing Methods

The Nightwatch bracelet was evaluated against bed sensors, the current standard for seizure detection. Results indicated that bed sensors identified only 21% of serious seizures, remaining silent once every four nights on average per patient. Conversely, the Nightwatch bracelet missed a serious seizure only once every 25 nights per patient, successfully detecting 85% of all serious nighttime seizures and 96% of the most severe cases. This study demonstrates that combining heart rate and movement patterns provides a reliable detection method for nocturnal seizures.

Feedback from Care Staff

Care staff involved in the study expressed positive feedback regarding the bracelet, noting that patients experienced no discomfort while wearing it at night. Researchers anticipate that utilizing the bracelet could potentially reduce SUDEP cases by two-thirds. If implemented worldwide, this device could save thousands of lives. However, the effectiveness of the Nightwatch also relies on the prompt response of caregivers to alarms.

Availability of the Nightwatch Device

The Nightwatch is now available for use by adults both at home and in institutional settings, marking a significant advancement in the management of epilepsy.

References

Johan Arends, Roland D. Thijs, Thea Gutter, Constantin Ungureanu, Pierre Cluitmans, Johannes Van Dijk, Judith van Andel, Francis Tan, Al de Weerd, Ben Vledder, Wytske Hofstra, Richard Lazeron, Ghislaine van Thiel, Kit C.B. Roes, Frans Leijten, and the Dutch Tele-Epilepsy Consortium. Multimodal nocturnal seizure detection in a residential care setting. Neurology Nov 2018, 91 (21) e2010-e2019; DOI:10.1212/WNL.0000000000006545.

New epilepsy warning device could save thousands of lives. EurekAlert website https://www.eurekalert.org/pub_releases/2018-11/euot-new110518.php. Accessed January 12, 2019.

Photo credit: LivAssured https://www.eurekalert.org/multimedia/pub/185082.php?from=411220.

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