Therapy control using relative motion between sensors
First Claim
1. A system comprising:
- a therapy delivery device that delivers a therapy to a patient;
a first activity sensor that generates a signal as a function of motion at a first location of a body of the patient;
a second activity sensor that generates a signal as a function of motion at a second location of the body of the patient; and
at least one processor that compares the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine a relative motion of the second location of the patient relative to the first location of the patient, compares at least one of a difference in magnitude of the motions detected by the first activity sensor and the second activity sensor or a difference in directionality of the motions detected by the first activity sensor and the second activity sensor to determine at least one of a magnitude of the relative motion or a directionality of the relative motion, detects a condition of a movement disorder when at least one of the magnitude of the relative motion or the directionality of the relative module exceeds a threshold, and controls the therapy delivered to the patient based on the condition of the movement disorder,wherein the movement disorder is selected from a group consisting of;
tremor, Parkinson'"'"'s disease, spasticity, epilepsy and dystonia, andwherein each of the first and second activity sensors comprises an accelerometer.
1 Assignment
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Accused Products
Abstract
The invention is directed to controlling therapy delivery based on a relative motion between a first and second activity sensor. The relative motion between the activity sensors is representative of the relative motion between the locations of the body of the patient at which the respective activity sensors are located. The use of relative motion, however, may substantially remove motion experienced by both the activity sensors, e.g., motion caused by the environment in which patient is located, thus providing a new reference frame from which to analyze the motion measurements. The relative motion may be used to detect a condition of a movement disorder and/or control delivery of the therapy delivered to patient to treat or reduce the condition.
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Citations
33 Claims
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1. A system comprising:
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a therapy delivery device that delivers a therapy to a patient; a first activity sensor that generates a signal as a function of motion at a first location of a body of the patient; a second activity sensor that generates a signal as a function of motion at a second location of the body of the patient; and at least one processor that compares the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine a relative motion of the second location of the patient relative to the first location of the patient, compares at least one of a difference in magnitude of the motions detected by the first activity sensor and the second activity sensor or a difference in directionality of the motions detected by the first activity sensor and the second activity sensor to determine at least one of a magnitude of the relative motion or a directionality of the relative motion, detects a condition of a movement disorder when at least one of the magnitude of the relative motion or the directionality of the relative module exceeds a threshold, and controls the therapy delivered to the patient based on the condition of the movement disorder, wherein the movement disorder is selected from a group consisting of;
tremor, Parkinson'"'"'s disease, spasticity, epilepsy and dystonia, andwherein each of the first and second activity sensors comprises an accelerometer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
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generating a signal as a function of motion at a first location of a body of a patient via a first activity sensor; generating a signal as a function of motion at a second location of the body of the patient via a second activity sensor; comparing the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine a relative motion of the second location of the patient relative to the first location of the patient; comparing at least one of a difference in magnitude of the signal generated by the first activity sensor and the signal generated by the second activity sensor or a difference in directionality of the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine at least one of a magnitude of the relative motion or a directionality of the relative motion; detecting a condition of a movement disorder when at least one of the magnitude of the relative motion or the directionality of the relative motion exceeds a threshold; and controlling a therapy delivered to the patient based on the condition of the movement disorder, wherein the movement disorder is selected from a group consisting of;
tremor, Parkinson'"'"'s disease, spasticity, epilepsy and dystonia, andwherein each of the first and second activity sensors comprises an accelerometer. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A system comprising:
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first means for generating a signal as a function of motion at a first location of a body of a patient via a first activity sensor; second means for generating a signal as a function of motion at a second location of the body of the patient via a second activity sensor; means for comparing the signal generated by the first generating means and the signal generated by the second generating means to determine a relative motion of the second location of the patient relative to the first location of the patient; means for comparing at least one of a difference in magnitude of the signal generated by the first activity sensor and the signal generated by the second activity sensor or a difference in directionality of the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine at least one of a magnitude of the relative motion or a directionality of the relative motion; means for detecting a condition of a movement disorder when at least one of the magnitude of the relative motion or the directionality of the relative motion exceeds a threshold; and means for controlling a therapy delivered to the patient based on the condition of the movement disorder, wherein the movement disorder is selected from a group consisting of;
tremor, Parkinson'"'"'s disease, spasticity, epilepsy and dystonia, andwherein each of the first and second activity sensors comprises an accelerometer.
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33. A non-transitory computer-readable medium comprising instructions that cause a processor to:
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receive a signal generated as a function of motion at a first location of a body of a patient by a first activity sensor; receive a signal generated as a function of motion at a second location of the body of the patient by a second activity sensor; compare the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine a relative motion of the second location of the patient relative to the first location of the patient; compare at least one of a difference in magnitude of the signal generated by the first activity sensor and the signal generated by the second activity sensor or a difference in directionality of the signal generated by the first activity sensor and the signal generated by the second activity sensor to determine at least one of a magnitude of the relative motion or a directionality of the relative motion; detect a condition of a movement disorder when at least one of the magnitude of the relative motion or the directionality of the relative motion exceeds a threshold; and control a therapy delivered to the patient based on the condition of the movement disorder, wherein the movement disorder is selected from a group consisting of;
tremor, Parkinson'"'"'s disease, spasticity, epilepsy and dystonia, andwherein each of the first and second activity sensors comprises an accelerometer.
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Specification