Seizure detection methods, apparatus, and systems using a short term average/long term average algorithm
AssigneeFlint Hills Scientific, L.L.C.
InventorsIvan Osorio, A. Lyubushin, D. Sornette
Life of this patent
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Abstract
Methods for detecting a seizure, by use of a short term average/long term average (STA/LTA) algorithm applied to body data. A non-transitive, computer-readable storage device for storing data that when executed by a processor, perform such a method.
Claims27
A non-transitory computer readable program storage unit encoded with instructions that, when executed by a computer, perform a method, comprising:
- receiving a time series of a first body signal of the patient;
- determining a sliding foreground time window and a sliding background time window for said time series of said first body signal;
- applying a spectral filter having a defined power spectral density to each of said foreground and background windows;
- determining the ratio of spectral power between said foreground and said background window;
- determining a seizure onset in response to a determination that said ratio reaches an onset threshold;
- determining a seizure termination in response to a determination that said ratio reaches a termination threshold.
A non-transitive, computer-readable storage device for storing data that when executed by a processor, performs a method, comprising:
- receiving a body signal of the patient during a first time series;
- determining a movable first time window and a movable second time window for said first time series;
- applying a spectral filter having a predetermined power spectral density to each of said first and second time windows;
- determining the ratio of spectral power between said first time window and said second time window;
- determining a seizure onset in response to a determination that said ratio reaches an onset threshold;
- and
- determining a seizure termination in response to a determination that said ratio reaches a termination threshold.
A medical device for detecting an onset and a termination of an epileptic seizure event from a patient body signal using a multi time-period averaging algorithm, comprising:
- a body data processing module for receiving a body signal of the patient during a first time series;
- and
- a seizure onset/termination unit to:
- select a first time window and a second time window within said first time series;
- apply a spectral filter having a predetermined power spectral density to each of said first and second time windows;
- determine a ratio of spectral power between said first time window and said second time window;
- determine that a seizure onset has occurred in response to a determination that said ratio reaches an onset threshold;
- and
- determine that a seizure termination has occurred in response to a determination that said ratio reaches a termination threshold.
Dependencies are inferred from the claim text.