Seizure onset classification and stimulation parameter selection
First Claim
1. A neurostimulation system comprising:
- a neurostimulator having a control module configured to detect seizure onsets and to generate an instance of stimulation therapy for delivery to a patient to treat a neurological condition corresponding to epilepsy, the instance of stimulation therapy defined by a stimulation parameter set within a stimulation parameter subspace; and
an external component comprising;
a memory,a table stored in the memory, which table correlates each of a plurality of seizure onset types to a stimulation parameter subspace;
one or more modules configured to compare a seizure onset detected by the neurostimulator to the plurality of seizure onset types in the table, to determine a ranking for the detected seizure onset corresponding to a probability that the detected seizure onset is a particular one of the plurality of seizure onset types, and to determine if the stimulation parameter set presently programmed into the neurostimulator is within a recommended stimulation parameter subspace, which recommended stimulation parameter subspace corresponds to the stimulation parameter subspace correlated in the table with the ranking for the detected seizure onset; and
a configuration module configured to provide an output signal to the control module of the neurostimulator when the stimulation parameter set presently programmed into the neurostimulator is not within the recommended stimulation parameter subspace, the output signal comprising the recommended stimulation parameter subspace.
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Accused Products
Abstract
A neurostimulation system senses electrographic signals from the brain of a patient, extracts features from the electrographic signals, and when the extracted features satisfy certain criteria, detects a neurological event type. A mapping function relates the detected neurological event type to a stimulation parameter subspace and a default stimulation parameter set where the values of the stimulation parameters define an instance of stimulation therapy for the patient. The decision whether to implement a stimulation parameter subspace or a default stimulation parameter set may be informed by integrating other information about a state of the patient. A stimulation parameter subspace or stimulation parameter set may optimized by testing it against various thresholds until certain effectiveness criteria is satisfied. The neurological event type may be one of several electrographic seizure onset types.
63 Citations
16 Claims
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1. A neurostimulation system comprising:
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a neurostimulator having a control module configured to detect seizure onsets and to generate an instance of stimulation therapy for delivery to a patient to treat a neurological condition corresponding to epilepsy, the instance of stimulation therapy defined by a stimulation parameter set within a stimulation parameter subspace; and an external component comprising; a memory, a table stored in the memory, which table correlates each of a plurality of seizure onset types to a stimulation parameter subspace; one or more modules configured to compare a seizure onset detected by the neurostimulator to the plurality of seizure onset types in the table, to determine a ranking for the detected seizure onset corresponding to a probability that the detected seizure onset is a particular one of the plurality of seizure onset types, and to determine if the stimulation parameter set presently programmed into the neurostimulator is within a recommended stimulation parameter subspace, which recommended stimulation parameter subspace corresponds to the stimulation parameter subspace correlated in the table with the ranking for the detected seizure onset; and a configuration module configured to provide an output signal to the control module of the neurostimulator when the stimulation parameter set presently programmed into the neurostimulator is not within the recommended stimulation parameter subspace, the output signal comprising the recommended stimulation parameter subspace. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An implantable neurostimulator having a control module configured to detect seizure onsets and to generate an instance of stimulation therapy for delivery to a patient, the instance of stimulation therapy defined by a stimulation parameter set within a stimulation parameter subspace, and the implantable neurostimulator including a processing system comprising:
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a memory; a table stored in the memory, which table correlates each of a plurality of seizure onset types to a stimulation parameter subspace; one or more modules configured to compare a seizure onset detected by the implantable neurostimulator to the plurality of seizure onset types in the table, to determine a ranking for the detected seizure onset corresponding to a probability that the detected seizure onset is a particular one of the plurality of seizure onset types, and to determine if the stimulation parameter set presently in used by the neurostimulator is within a recommended stimulation parameter subspace, which recommended stimulation parameter subspace corresponds to the stimulation parameter subspace correlated in the table with the ranking for the detected seizure onset; and a configuration module configured to provide an output signal to the control module of the implantable neurostimulator when the stimulation parameter set presently programmed into the neurostimulator is not within the recommended stimulation parameter subspace, the output signal comprising the recommended stimulation parameter subspace. - View Dependent Claims (11, 12)
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13. A method of defining values of parameters used by a neurostimulator having a control module configured to detect seizure onsets and to generate an instance of stimulation therapy for delivery to a patient, wherein the instance of stimulation therapy is defined by a stimulation parameter set within a stimulation parameter subspace, and the defining is performed by a processing system, the method comprising:
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correlating each of a plurality of seizure onset types to a stimulation parameter subspace; comparing a seizure onset detected by the neurostimulator to the correlated plurality of seizure onset types; determining a ranking for the detected seizure onset corresponding to a probability that the detected seizure onset is a particular one of the plurality of seizure onset types; determining if the stimulation parameter set presently programmed into the neurostimulator is within a recommended stimulation parameter subspace, which recommended stimulation parameter subspace corresponds to the stimulation parameter subspace correlated in the table with the ranking for the detected seizure onset; and providing an output signal to the control module of the neurostimulator when the stimulation parameter set presently programmed into the neurostimulator is not within the recommended stimulation parameter subspace, the output signal comprising the recommended stimulation parameter subspace. - View Dependent Claims (14, 15, 16)
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Specification