Patent ID: 8540629

Claim:
A method comprising, by one or more processors associated with one or more computing devices: accessing, by one or more of the processors, one or more data streams from a plurality of sensors, the sensors comprising two or more of a heart-rate monitor, a blood-pressure monitor, a pulse oximeter, a mood sensor, or an accelerometer, the data streams comprising one or more of heart-rate data of a person from the heart-rate monitor, blood-pressure data of the person from the blood-pressure monitor, pulse-oximetry data of the person from the pulse oximeter, self-reported mood data of the person from the mood sensor, or accelerometer data of the person from the accelerometer; accessing, by one or more of the processors, a stress model, the stress model comprising baseline renal-Doppler data and two or more of baseline heart-rate data, baseline blood-pressure data, baseline pulse-oximetry data, or baseline self-reported mood data, wherein the baseline-renal-Doppler data measures a stress response of the sympathetic nervous system, and the stress model correlates the baseline renal-Doppler data with two or more of the baseline heart-rate data, the baseline blood-pressure data, the baseline pulse-oximetry data, or the baseline self-reported mood data; analyzing, by one or more of the processors, the data streams with respect to the stress model; and determining, by one or more of the processors, based on the analysis a current stress index of the person.