Detecting sleep
AssigneeMedtronic, Inc.
InventorsKenneth T. Heruth, Keith A. Miesel
Life of this patent
Estimating the term…
Abstract
A system includes one or more sensors and a processor. Each of the sensors generates a signal as a function of at least one physiological parameter of a patient that may discernibly change when the patient is asleep. The processor monitors the physiological parameters, and determines whether the patient is asleep based on the parameters. In some embodiments, the processor determines plurality of sleep metric values, each of which indicates a probability of the patient being asleep, based on each of a plurality of physiological parameters. The processor may average or otherwise combine the plurality of sleep metric values to provide an overall sleep metric value that is compared to a threshold value in order to determine whether the patient is asleep.
Claims7
A medical system comprising:
- a plurality of sensors, each of the sensors generating a signal as a function of at least one physiological parameter of a patient;
- and
- an implantable medical device including a processor configured to:
- monitor a plurality of physiological parameters of the patient based on the signals output by the sensors,
- for each of the plurality of physiological parameters, determine a respective one of a plurality of sleep metric values, each of the sleep metric values indicating a probability of the patient being asleep based on the respective physiological parameter, and
- mathematically combine the plurality of sleep metric values that each indicates the probability of the patient being asleep based on the respective one of the plurality physiological parameters to determine an overall sleep metric value that indicates an overall probability of the patient being asleep,
- wherein the physiological parameters comprise at least one of electrocardiogram morphology, core temperature, subcutaneous temperature, muscular tone, brain electrical activity, or eye motion.
A system comprising:
- means for monitoring a plurality of physiological parameters of a patient;
- and
- implantable means for determining a respective one of a plurality of sleep metric values for each of the plurality of physiological parameters, each of the sleep metric values indicating a probability of the patient being asleep based on the respective physiological parameter,
- further comprising means for mathematically combining the plurality of sleep metric values that each indicates the probability of the patient being asleep based on the respective one of the plurality physiological parameters to determine an overall sleep metric value that indicates an overall probability of the patient being asleep,
- wherein the physiological parameters comprise at least one of electrocardiogram morphology, core temperature, subcutaneous temperature, muscular tone, brain electrical activity, or eye motion.
Dependencies are inferred from the claim text.