Automated calibration of posture state classification for a medical device
First Claim
1. A method for controlling a medical device, comprising:
- associating, via a processor, a posture state with at least one therapy parameter value;
sensing, via a posture state sensor, a first physiological signal indicative of the posture state of a patient;
sensing, via a second sensor, a second physiological signal indicative of an electrical signal originating from the patient; and
delivering, via a therapy delivery module, therapy to the patient according to the at least one therapy parameter value in response to determining that the patient is in the associated posture state based on the first physiological signal,wherein associating, via the processor, the posture state with the at least one therapy parameter value is based, at least in part, on the second physiological signal.
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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
33 Claims
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1. A method for controlling a medical device, comprising:
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associating, via a processor, a posture state with at least one therapy parameter value; sensing, via a posture state sensor, a first physiological signal indicative of the posture state of a patient; sensing, via a second sensor, a second physiological signal indicative of an electrical signal originating from the patient; and delivering, via a therapy delivery module, therapy to the patient according to the at least one therapy parameter value in response to determining that the patient is in the associated posture state based on the first physiological signal, wherein associating, via the processor, the posture state with the at least one therapy parameter value is based, at least in part, on the second physiological signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 30, 31, 32, 33)
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10. A medical system, comprising:
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a memory configured to store an association between a posture state and at least one therapy parameter value; a posture state sensor configured to sense a first physiological signal indicative of at least one of an activity and a posture of a patient; a second sensor configured to sense a second physiological signal indicative of electrical activity sensed from tissue of the patient; and one or more processors configured to control delivery of therapy to the patient according to the at least one therapy parameter value in response to determining that the patient is in the posture state based on the first physiological signal, and wherein the association between the posture state and the at least one therapy parameter value is formed based, at least in part, on the second physiological signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A medical device, comprising:
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a memory configured to store one or more posture state definitions, each indicating a posture state and at least one therapy parameter value used to control delivery of therapy to a patient when the patient is determined to be in the posture state; a posture state sensor configured to sense a first physiological signal indicative of a posture state of the patient; a second sensor configured to sense a second physiological signal, wherein the second physiological signal is an electrical signal originating from tissue of the patient; and a processor configured to receive the first physiological signal from the posture state sensor, determine the posture state of the patient based on the first physiological signal and the one or more posture state definitions, determine the at least one therapy parameter associated with the determined posture state of the patient in the memory, and control delivery of therapy to the patient according to the at least one therapy parameter determined to be associated with the determined posture state of the patient, wherein at least one of the one or more posture state definitions is stored, based at least in part, on the second physiological signal. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A medical system, comprising:
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memory means for storing one or more posture state definitions, each indicating a posture state and at least one therapy parameter value used to control delivery of therapy to a patient when the patient is determined to be in the posture state; posture state sensor means for sensing a first physiological signal indicative of a posture state of the patient; second sensor means for sensing a second physiological signal, wherein the second physiological signal is an electrical signal originating from tissue of the patient; and processing means for receiving the first physiological signal from the posture state sensing means, for determining the posture state of the patient based on the first physiological signal and the one or more posture state definitions, for determining the at least one therapy parameter associated with the determined posture state of the patient in the memory means, and for controlling delivery of therapy to the patient according to the at least one therapy parameter determined to be associated with the determined posture state of the patient, wherein at least one of the one or more posture state definitions is stored, based at least in part, on the second physiological signal.
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Specification