AUTOMATED CALIBRATION OF POSTURE STATE CLASSIFICATION FOR A MEDICAL DEVICE
First Claim
1. A medical device, comprising:
- a memory adapted to store posture state definitions for classifying a posture state of a patient; and
a processor adapted to obtain a reference vector having a predetermined relationship to a housing of the medical device and to automatically estimate from the reference vector a parameter value for at least one of the posture state definitions.
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Accused Products
Abstract
Techniques relate to operating a medical device by classifying a detected posture state of a patient. This classification may be performed by comparing the detected posture state of the patient to posture state definitions available within the system. Each definition may be described in terms of a parameter (e.g., vector) indicative of a direction in three-dimensional space. The posture state definitions may be calibrated by automatically estimating values for these parameters, thereby eliminating the need for the patient to assume each posture state during the calibration process to capture actual parameter values. According to another aspect, the estimated parameter values may be updated as the patient assumes various postures during a daily routine. For instance, estimated vectors initially used to calibrate the posture state definitions may be changed over time to more closely represent posture states the patient actually assumes, and to further adapt to changes in a patient'"'"'s condition.
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Citations
36 Claims
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1. A medical device, comprising:
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a memory adapted to store posture state definitions for classifying a posture state of a patient; and a processor adapted to obtain a reference vector having a predetermined relationship to a housing of the medical device and to automatically estimate from the reference vector a parameter value for at least one of the posture state definitions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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obtaining a reference vector having a predetermined relationship to a housing of a medical device; employing the reference vector to obtain at least one estimated vector that estimates a posture state of the patient; using, by a processor, the at least one estimated vector to generate one or more posture state definitions; and classifying a posture state of a patient based on the posture state definitions. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A system comprising:
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a housing to be disposed in a substantially-fixed relationship in reference to a patient; a storage device to store defined posture state vectors, each being used to define a corresponding posture state of the patient; and a processor adapted to obtain a reference vector that is determined prior to a time the housing is disposed in reference to the patient, to utilize the reference vector to estimate a respective value for one or more of the defined posture state vectors for one or more of the defined posture states, and to use the one or more defined posture states to classify the posture state of the patient. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A system, comprising:
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means for obtaining a reference vector and for employing the reference vector to obtain at least one estimated vector that estimates a posture state of the patient; means for using the at least one estimated vector to automatically generate one or more posture state definitions; means for classifying a posture state of a patient based on the posture state definitions; and means for delivering therapy to the patient based on the posture state classification.
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Specification