Automated calibration of posture state classification for a medical device
First Claim
1. A medical device, comprising:
- a sensor adapted to provide an indication of a posture state of the patient;
a memory adapted to store posture state definitions for classifying the posture state of a patient; and
a processor adapted to obtain a reference vector, to automatically estimate from the reference vector a parameter value for at least one of the posture state definitions, and to classify the posture state of the patient based on the posture state definitions and the indication of the posture state of the patient, wherein the reference vector has a relationship to the housing of the medical device that is determined prior to the time the medical device is disposed in reference to the patient.
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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 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.
397 Citations
40 Claims
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1. A medical device, comprising:
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a sensor adapted to provide an indication of a posture state of the patient; a memory adapted to store posture state definitions for classifying the posture state of a patient; and a processor adapted to obtain a reference vector, to automatically estimate from the reference vector a parameter value for at least one of the posture state definitions, and to classify the posture state of the patient based on the posture state definitions and the indication of the posture state of the patient, wherein the reference vector has a relationship to the housing of the medical device that is determined prior to the time the medical device is disposed in reference to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 36, 39, 40)
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15. A method for providing care to a patient via a medical device, comprising:
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prior to disposing the medical device in relation to the patient, determining a relationship to a housing of the medical device that will be used to obtain a reference vector; obtaining the reference vector having the relationship to the housing of a medical device; employing the reference vector to obtain at least one estimated vector that estimates a corresponding posture state of the patient; using, by a processor, the at least one estimated vector to generate one or more posture state definitions; obtaining, by a sensor, an indication of posture state of the patient; classifying the posture state of a patient based on the posture state definitions and the indication; and initiating a response related to the care of the patient based on the classified posture state. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 37)
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26. A system comprising:
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a housing adapted to be disposed in a substantially-fixed relationship in reference to a patient; a sensor adapted to provide an indication of a posture state of the patient; a storage device adapted 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 having a relationship to the housing 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, to use the one or more defined posture states and the indication of the posture state of the patient to classify the posture state of the patient, and to initiate a response associated with care of the patient based on the classified posture state of the patient. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 38)
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Specification