Logging daily average metabolic activity using a motion sensor

摘要

An implantable activity detector can detect metabolic stress levels, which can be normalized, such as to identify times of activities such as walking and running or to identify trends such as a decrease in metabolic activity. The data can be derived from different sources such as an accelerometer and pedometer. This data can be compared to independently specifiable thresholds, such as to trigger an alert or responsive therapy, or to display one or more trends. The information can also be combined with other congestive heart failure (CHF) indications. The alert can notify the patient or a caregiver, such as via remote monitoring. Metabolic activity data from one or more of the activity detectors can be used to establish a model of metabolic stress, to which further activity data can be compared for identifying periods of increased or decreased metabolic stress.

主权项

1. A system comprising:
an activity detector, configured to:
detect a physical movement by a subject; andmeasure exertion data, indicating an exertion level of the subject, measured from the detected physical movement by the subject; a processor circuit, coupled to the activity detector, the processor configured to analyze the exertion data from the activity detector, the processor configured to determine a metabolic stress indicator derived from an integration or area under the curve calculation of the measured exertion data occurring during the exertion within a time period; and an alert response module operatively coupled to the processor circuit, the alert response module configured to generate an alert in response to the metabolic stress indicator meeting a specified criterion.