Patent ID: 11963779
Assignee: NEUROPACE, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A method of an implanted medical device, the method comprising:
identifying a half wave in an electrical signal sensed from a brain;
determining an amplitude of the half wave and a duration of the half wave;
determining whether the identified half wave has a positive slope or a negative slope;
in a case of a positive-slope half wave, determining if the amplitude satisfies a positive-slope half wave amplitude criterion defined by a first set of amplitude parameters comprising a minimum amplitude and a maximum amplitude, and if the duration satisfies a positive-slope half wave duration criterion defined by a first set of duration parameters comprising a minimum duration and a maximum duration;
in a case of a negative-slope half wave, determining if the amplitude satisfies a negative-slope half wave amplitude criterion defined by a second set of amplitude parameters comprising a minimum amplitude and a maximum amplitude that is different from the first set of amplitude parameters, and if the duration satisfies a negative-slope half wave duration criterion defined by a second set of duration parameters comprising a minimum duration and a maximum duration that is different from the first set of duration parameters;
identifying the half wave as a qualified half wave when each of the half wave amplitude criterion and the half wave duration criterion is satisfied; and
determining, based on a count of a number of qualified half waves occurring within a time window and a half wave count criterion, whether the electrical signal includes electrographic activity indicative of epileptiform activity;
outputting an electrical stimulation to one or more electrodes upon determining the electrical signal includes electrographic activity indicative of epileptiform activity.