Velocity detection for posture-responsive therapy
First Claim
1. A system comprising:
- a sensor configured to sense one or more posture state parameters of a patient; and
a posture state module comprising circuitry configured to determine a posture state of the patient to be used in controlling an aspect of the system, the posture state being determined based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold,wherein the posture state module comprises circuitry configured to determine the velocity of the patient based on a distance between two sensed coordinate vectors, wherein each of the two sensed coordinate vectors is indicative of a respective posture state of the patient.
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Abstract
The disclosure describes techniques for modifying an electrical stimulation or another type of therapy provided to a patient by a medical device. The therapy modification may be based on a posture and/or activity state of a patient that is detected by an IMD, such as a change in a detected posture state occupied by the patient. Different therapy modifications may be applied for different changes in detected posture state. An IMD may modify therapy based on a transition from one posture state to another posture state. The IMD may determine a posture state of the patient for use in controlling therapy adjustments and/or other aspects of the system. In some examples, when the patient'"'"'s movement and/or activity velocity exceeds a velocity threshold, a previously-determined stable posture state of the patient may be used to control therapy rather than a current posture state of the patient, which may be transient.
354 Citations
30 Claims
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1. A system comprising:
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a sensor configured to sense one or more posture state parameters of a patient; and a posture state module comprising circuitry configured to determine a posture state of the patient to be used in controlling an aspect of the system, the posture state being determined based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold, wherein the posture state module comprises circuitry configured to determine the velocity of the patient based on a distance between two sensed coordinate vectors, wherein each of the two sensed coordinate vectors is indicative of a respective posture state of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
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a sensor configured to sense one or more posture state parameters of a patient; and a posture state module comprising circuitry configured to determine a posture state of the patient to be used in controlling an aspect of the system, the posture state being determined based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold, wherein the posture state module comprises circuitry configured to determine the velocity of the patient based on an angle between two sensed coordinate vectors, wherein each of the two sensed coordinate vectors is indicative of a respective posture state of the patient.
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14. A method comprising:
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sensing, by a sensor, one or more posture state parameters of a patient; and determining, via a posture state module comprising circuitry, a posture state of the patient for use in controlling an aspect of the system, the determined posture state being determined based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold, wherein the velocity of the patient is a movement velocity that is based on a distance. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method comprising:
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sensing, by a sensor, one or more posture state parameters of a patient; and determining, via a posture state module comprising circuitry, a posture state of the patient for use in controlling an aspect of the system, the determined posture state being determined based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold, wherein the velocity of the patient is a movement velocity that is based on an angle. - View Dependent Claims (26)
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27. A system comprising:
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means for sensing one or more posture state parameters of a patient; and means for determining, via a posture state module, a posture state of the patient based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold, wherein the velocity of the patient is based on a distance or is based on an angle.
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28. A non-transitory storage medium storing instructions executable by a control circuit to cause the control circuit to
sense one or more posture state parameters of a patient; - and
determine a posture state of the patient based on the one or more posture state parameters and a relationship between a velocity of the patient and a velocity threshold, wherein the velocity of the patient is based on a distance or is based on an angle. - View Dependent Claims (29, 30)
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Specification