Posts Tagged Nightwatch
A new high-tech bracelet, developed by scientists from the Netherlands detects 85 percent of all severe night-time epilepsy seizures. That is a much better score than any other technology currently available. The researchers involved think that this bracelet, called Nightwatch, can reduce the worldwide number of unexpected night-time fatalities in epilepsy patients. They published the results of a prospective trial in the scientific journal Neurology.
SUDEP, sudden unexpected death in epilepsy, is a major cause of mortality in epilepsy patients. People with an intellectual disability and severe therapy resistant epilepsy, may even have a 20% lifetime risk of dying from epilepsy. Although there are several techniques for monitoring patients at night, many attacks are still being missed.
Consortium researchers have therefore developed a bracelet that recognizes two essential characteristics of severe attacks: an abnormally fast heartbeat, and rhythmic jolting movements. In such cases, the bracelet will send a wireless alert to carers or nurses.
The research team prospectively tested the bracelet, known as Nightwatch, in 28 intellectually handicapped epilepsy patients over an average of 65 nights per patient. The bracelet was restricted to sounding an alarm in the event of a severe seizure. The patients were also filmed to check if there were any false alarms or attacks that the Nightwatch might have missed. This comparison shows that the bracelet detected 85 percent of all serious attacks and 96% of the most severe ones (tonic-clonic seizures), which is a particularly high score.
For the sake of comparison, the current detection standard, a bed sensor that reacts to vibrations due to rhythmic jerks, was tested at the same time. This signalled only 21% of serious attacks. On average, the bed sensor therefore remained unduly silent once every 4 nights per patient. The Nightwatch, on the other hand, only missed a serious attack per patient once every 25 nights on average. Furthermore, the patients did not experience much discomfort from the bracelet and the care staff were also positive about the use of the bracelet.
These results show that the bracelet works well, says neurologist and research leader Prof. Dr. Johan Arends. The Nightwatch can now be widely used among adults, both in institutions and at home. Arends expects that this may reduce the number of cases of SUDEP by two-thirds, although this also depends on how quickly and adequately care providers or informal carers respond to the alerts. If applied globally, it can save thousands of lives.
Watch the video here: https://youtu.be/0G_BQK4LK88
- 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. Multimodal nocturnal seizure detection in a residential care setting. Neurology, 2018; 10.1212/WNL.0000000000006545 DOI: 10.1212/WNL.0000000000006545
Dutch scientists have created the Nightwatch, a smart bracelet that monitors heart rate and movement of the user. In the case that the device will notice increased activity and reduction of muscles characteristic of epileptic seizure, the indicator light will turn red, and the bracelet itself will be able to report the attack to the medical staff.
This was reported in the journal Neurology.
The publication presents the results of the first study.
Repetitive seizures often occur when exposed to certain external and internal factors. For example, it is well known that the attack may be a touch to occur from exposure to bright flashing lights. In addition, epileptic seizures may accompany menstruation, as well as to synchronize with the cycles of sleep and wakefulness. In the latter case, the seizures often occur during sleep: to control them can be difficult, and to prevent the consequences without the use of special (often invasive) devices for monitoring — virtually impossible.
Especially to scientists from the University medical center Utrecht under the leadership of Johan Arends (Arends Johan) came up with a wearable bracelet, which is worn on the forearm of the patient and monitors two main indicators characteristic of epileptic seizures: elevated heart rate and irregular contraction of the muscles. Upon receipt of a signal from both of these indicators led color on the bracelet changes, but it also sends the audio signal to health workers.
The effectiveness of the bracelet tested on 28 patients with epilepsy: everyone wore the bracelet at least 65 nights. Scientists analyzed data about 1826 the night, which was 809 attacks. For additional control, participants were also videotaped during sleep, which allowed to calculate the percentage of false-positive and false-negative signals.
The bracelet has correctly recognized the attacks in 85 percent of cases, and about the most serious seizures, tonic-clonic, was able to report in 96 percent of cases.
Scientists hope that the use of the gadget will not only improve and simplify the monitoring of epileptic attacks, but also can reduce the number of sudden deaths due to epilepsy, which often occur with seizures during sleep. According to their estimates, the use of Nightwatch will reduce the number of deaths by two-thirds.