Determination of sleep quality for neurological disorders
First Claim
1. A medical system comprising:
- a medical device configured to deliver a therapy within a cranium of a patient to treat a neurological disorder of the patient;
a sensor configured to sense, via at least one electrode of a lead positioned within the cranium of the patient, electrical activity of the brain of the patient during the delivery of the therapy to the patient, the at least one electrode being in communication with the medical device; and
a processor configured to;
associate each of a plurality of different frequency bands of the sensed electrical activity of the brain of the patient with a respective one or more sleep states of a plurality of sleep states of the patient, wherein the plurality of sleep states comprise at least two of a rapid eye movement (REM) state, a non-rapid eye movement (NREM) S1 state, an NREM S2 state, an NREM S3 state, or an NREM S4 state;
compare relative power levels of the plurality of different frequency bands of the sensed electrical activity of the brain of the patient to one another;
determine that a first relative power of a first frequency band of the plurality of different frequency bands is greater than a relative power of each of the other frequency bands of the plurality of different frequency bands;
determine, based upon the determination that the first relative power of the first frequency band is greater than the relative power of each of the other frequency bands, that the patient is within a first sleep state of the plurality of sleep states associated with the first frequency band; and
select therapy parameters for the delivery of the therapy based on the determination that the patient is within the first sleep state,wherein the medical device is configured to deliver the therapy according to the therapy parameters selected by the processor based on the determination that the patient is within the first sleep state.
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Abstract
A device determines values for one or more metrics that indicate the quality of a patient'"'"'s sleep based on sensed physiological parameter values. Sleep efficiency, sleep latency, and time spent in deeper sleep states are example sleep quality metrics for which values may be determined. The sleep quality metric values may be used, for example, to evaluate the effectiveness of a therapy delivered to the patient by a medical device. In some embodiments, determined sleep quality metric values are automatically associated with the therapy parameter sets according to which the medical device delivered the therapy when the physiological parameter values were sensed, and used to evaluate the effectiveness of the various therapy parameter sets. The medical device may deliver the therapy to treat a non-respiratory neurological disorder, such as epilepsy, a movement disorder, or a psychological disorder. The therapy may be, for example, deep brain stimulation (DBS) therapy.
214 Citations
18 Claims
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1. A medical system comprising:
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a medical device configured to deliver a therapy within a cranium of a patient to treat a neurological disorder of the patient; a sensor configured to sense, via at least one electrode of a lead positioned within the cranium of the patient, electrical activity of the brain of the patient during the delivery of the therapy to the patient, the at least one electrode being in communication with the medical device; and a processor configured to; associate each of a plurality of different frequency bands of the sensed electrical activity of the brain of the patient with a respective one or more sleep states of a plurality of sleep states of the patient, wherein the plurality of sleep states comprise at least two of a rapid eye movement (REM) state, a non-rapid eye movement (NREM) S1 state, an NREM S2 state, an NREM S3 state, or an NREM S4 state; compare relative power levels of the plurality of different frequency bands of the sensed electrical activity of the brain of the patient to one another; determine that a first relative power of a first frequency band of the plurality of different frequency bands is greater than a relative power of each of the other frequency bands of the plurality of different frequency bands; determine, based upon the determination that the first relative power of the first frequency band is greater than the relative power of each of the other frequency bands, that the patient is within a first sleep state of the plurality of sleep states associated with the first frequency band; and select therapy parameters for the delivery of the therapy based on the determination that the patient is within the first sleep state, wherein the medical device is configured to deliver the therapy according to the therapy parameters selected by the processor based on the determination that the patient is within the first sleep state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A medical system comprising:
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a medical device configured to deliver a therapy within a cranium of a patient to treat a neurological disorder of the patient; a sensor configured to sense, via at least one electrode of a lead positioned within the cranium of the patient, electrical activity of the brain of the patient during the delivery of the therapy to the patient, the at least one electrode being in communication with the medical device; and a processor configured to; associate a first frequency band of a plurality of different frequency bands of the sensed electrical activity of the brain of the patient with a respective first sleep state of a plurality of sleep states of the patient, wherein the plurality of sleep states comprise at least two of a rapid eye movement (REM) state, a non-rapid eye movement (NREM) S1state, an NREM S2 state, an NREM S3 state, or an NREM S4 state; determine that a first power level of the first frequency band of the plurality of different frequency bands of the sensed electrical activity of the brain of the patient is greater than a first predetermined level for a first predetermined amount of time; determine, in response to the determination that the first power level is greater than the first predetermined level for the first predetermined amount of time, that the patient is within the first sleep state; and select therapy parameters for the delivery of the therapy based on the determination that the patient is within the first sleep state; wherein the medical device is configured to deliver the therapy according to the therapy parameters selected by the processor based on the determination that the patient is within the first sleep state. - View Dependent Claims (16, 17, 18)
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Specification