Patent ID: 8165683
Filing Date: 2012-04-24
Classification: A61B,A61N,G06K,G16H

Abstract:
1. A method of detecting a neurological event, the method comprising: acquiring an EEG signal comprising a stream of sampled data values; transforming the stream of sampled data values into a stream of data magnitude values; determining, with processing circuitry, a long-term representation of the EEG signal from the data magnitude values, comprising comparing a data magnitude value to a previous value of the long-term representation, and incrementing the previous value by a predetermined increment amount if the data magnitude value equals or exceeds the previous value, and decrementing the previous value by a predetermined decrement amount if the data magnitude value is less than the previous value; deriving a magnitude threshold from the long-term representation; comparing the data magnitude values to the magnitude threshold to produce a stream of comparator output values, each comparator output value indicating whether a given data magnitude value exceeds the magnitude threshold; calculating an event monitoring parameter based on a rolling window of comparator output values; comparing the event monitoring parameter to an onset threshold; and detecting a neurological event when the event monitoring parameter exceeds the onset threshold.