Method and system for logging quantitative seizure information and assessing efficacy of therapy using cardiac signals
First Claim
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1. A method for assessing efficacy of an administered therapy for brain state changes of a subject via an implantable medical device, the method comprising:
- (a) receiving at least one cardiac signal of the subject via the implantable medical device;
(b) detecting a change in a brain state of the subject based on a detected first cardiac signal feature value of the cardiac signal, the change in the brain state indicative of a seizure;
(c) determining at least one characteristic of the detected brain state change based on the cardiac signal, the characteristic including at least one of an onset time of a detected brain state change, an end time of the detected brain state change, a duration of the detected brain state change, an intensity of the detected brain state change, and a severity of the detected brain state change;
(d) logging the at least one characteristic of the detected brain state change at a memory;
(e) administering a therapy for treating the detected brain state change of the subject;
(f) logging data associated with the administered therapy, wherein the data includes at least one of a dose, an administration site, and a timing of an administration;
(g) assessing the efficacy of the administered therapy based on the logged data and the at least one logged characteristic; and
(h) generating therapy efficacy information based on the logged data;
wherein the intensity of the detected brain state change is determined by at least one of;
(a) a maximal deviation of a second cardiac signal feature value occurring after an indication of the detected brain state change event, the maximal deviation being measured from a baseline for the first signal characteristic prior to the indication;
(b) a first time from the indication to the maximal deviation;
(c) a second time from the maximal deviation to a recovery to the baseline;
(d) a third time from the indication to the recovery to the baseline;
(e) conformance of a third cardiac signal feature value to a stereotypical pattern for the third cardiac signal feature value during the third time between the indication and the recovery to the baseline; and
(f) a change in morphology of a cardiac signal.
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Abstract
A system and method for analyzing and logging changes in brain state of a subject for administering therapy to the subject based on the at least one cardiac signal wherein the system and method comprises the steps of receiving at least one cardiac signal of the subject into a processor, analyzing the cardiac signal to detect at least one cardiac signal change indicative of a brain state change, and logging at least one characteristic of the detected signal change or the brain state change.
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13 Claims
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1. A method for assessing efficacy of an administered therapy for brain state changes of a subject via an implantable medical device, the method comprising:
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(a) receiving at least one cardiac signal of the subject via the implantable medical device; (b) detecting a change in a brain state of the subject based on a detected first cardiac signal feature value of the cardiac signal, the change in the brain state indicative of a seizure; (c) determining at least one characteristic of the detected brain state change based on the cardiac signal, the characteristic including at least one of an onset time of a detected brain state change, an end time of the detected brain state change, a duration of the detected brain state change, an intensity of the detected brain state change, and a severity of the detected brain state change; (d) logging the at least one characteristic of the detected brain state change at a memory; (e) administering a therapy for treating the detected brain state change of the subject; (f) logging data associated with the administered therapy, wherein the data includes at least one of a dose, an administration site, and a timing of an administration; (g) assessing the efficacy of the administered therapy based on the logged data and the at least one logged characteristic; and (h) generating therapy efficacy information based on the logged data; wherein the intensity of the detected brain state change is determined by at least one of; (a) a maximal deviation of a second cardiac signal feature value occurring after an indication of the detected brain state change event, the maximal deviation being measured from a baseline for the first signal characteristic prior to the indication; (b) a first time from the indication to the maximal deviation; (c) a second time from the maximal deviation to a recovery to the baseline; (d) a third time from the indication to the recovery to the baseline; (e) conformance of a third cardiac signal feature value to a stereotypical pattern for the third cardiac signal feature value during the third time between the indication and the recovery to the baseline; and (f) a change in morphology of a cardiac signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for assessing efficacy of a therapy for a brain state change of a subject via an implantable medical device, the method comprising:
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(a) receiving one or more cardiac signals of the subject via the implantable medical device; (b) determining a first cardiac signal feature value based on the received one or more cardiac signals; (c) detecting an underlying brain state change event based on the detected first cardiac signal feature value, the underlying brain state change event indicative of an epileptic seizure; (d) administering therapy for treating the underlying brain state change event; (e) determining a second cardiac signal feature value of the subject after the detection of the underlying brain state change event and an administration of therapy based on the received one or more cardiac signals; (f) determining a characteristic of the underlying brain state change event based on a comparison of the first cardiac signal feature value and the second cardiac signal feature value; (g) logging into a memory the characteristic; (h) assessing the efficacy of the administered therapy based on the detection of the underlying brain state change event and the logged characteristic; (i) logging at least one feature indicative of the administered therapy into the memory; and (j) transmitting the logged information corresponding to the efficacy of the administered therapy to a device external to the implantable medical device. - View Dependent Claims (11, 12, 13)
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Specification