Seizure detection methods, apparatus, and systems using a short term average/long term average algorithm
AssigneeFlint Hills Scientific, L.L.C.
InventorsIvan Osorio, Alexey 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.
Claims26
A non-transitory computer readable program storage unit encoded with instructions that, when executed by one or more medical devices, performs a method, comprising:
- receiving via the one or more medical devices a time series of a first body signal of a patient obtained from one or more sensors;
- determining a sliding foreground time window and a sliding background time window for the time series of the first body signal;
- applying a spectral filter having a defined power spectral density to each of the sliding foreground time window and the sliding background time window;
- determining a ratio of a spectral power between the sliding foreground time window and the sliding background time window;
- determining a seizure onset in response to a first determination that the ratio reaches an onset threshold;
- initiating an electrical therapy based on the seizure onset determination;
- and
- determining a seizure termination in response to a second determination that the ratio reaches a termination threshold.
A non-transitive, computer-readable storage device for storing data that when executed by one or more medical devices, performs a method, comprising:
- receiving via the one or more medical devices a body signal of a patient during a first time series obtained from one or more sensors;
- determining a movable first time window and a movable second time window for the first time series;
- applying a spectral filter having a predetermined power spectral density to each of the movable first time window and the movable second time window;
- determining a ratio of a spectral power between the movable first time window and the movable second time window;
- determining a seizure onset in response to a first determination that the ratio reaches an onset threshold;
- initiating an electrical therapy based on the seizure onset determination;
- and
- determining a seizure termination in response to a second determination that the ratio reaches a termination threshold.
A medical device for detecting a seizure onset and a seizure 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 a patient during a first time series from one or more sensors;
- and
- a seizure onset/termination unit configured to:
- select a first time window and a second time window within the first time series;
- apply a spectral filter having a predetermined power spectral density to each of the first time window and the second time window;
- determine a ratio of a spectral power between the first time window and the second time window;
- determine that the seizure onset has occurred in response to a first determination that the ratio reaches an onset threshold;
- initiating an electrical therapy based on the seizure onset determination;
- and
- determine that the seizure termination has occurred in response to a second determination that the ratio reaches a termination threshold.
Dependencies are inferred from the claim text.