Low-power real-time seizure detection system

A - Human Necessities – 61 – B

Patent

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Details

A61B 5/0476 (2006.01) A61B 5/048 (2006.01)

Patent

CA 2749342

A method for detecting an approaching seizure is disclosed. The method includes receiving an analog neurosignal from an electrode, comparing the analog neurosignal with a predetermined amplitude threshold to generate a plurality of digital transitions corresponding to the analog neurosignal transitioning from a first level below the predetermined amplitude threshold to a second level above the predetermined amplitude threshold, generating a plurality of comparator signals, each comparator signal of the plurality of comparator signals corresponding to a comparison of a length of time between a pair of digital transitions of the plurality of digital transitions and a predetermined temporal threshold, and generating a seizure detection signal if at least two of the comparator signals of the plurality of comparator signals are enabled. A seizure detection system for detecting an approaching seizure is also disclosed.

La présente invention concerne un procédé permettant de détecter la survenue prochaine d'une crise. Le procédé comprend les étapes consistant à : recevoir un neurosignal analogique en provenance d'une électrode; comparer le neurosignal analogique à un seuil d'amplitude prédéterminé de sorte à générer une pluralité de transitions numériques correspondant à la transition du neurosignal analogique entre un premier niveau inférieur au seuil d'amplitude prédéterminé et un second niveau supérieur au seuil d'amplitude prédéterminé; générer une pluralité de signaux de comparaison, chaque signal de comparaison de la pluralité de signaux de comparaison correspondant à la comparaison d'une longueur de temps entre une paire de transitions numériques de la pluralité de transitions numériques et un seuil temporel prédéterminé; et générer un signal de détection de crise si au moins deux des signaux de comparaison de la pluralité de signaux de comparaison sont actifs. La présente invention concerne également un système de détection de crise permettant de détecter la survenue prochaine d'une crise.

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