DEVICE FOR DETERMINING THE STATUS OF PHYSICAL ACTIVITY OF A PATIENT UNDER OXYGEN THERAPY

摘要

The invention relates to a device for determining the physical activity state of a patient under oxygen therapy comprising an accelerometer designed to operate, during at least a first given duration ti, acceleration measurements (aX, i, aY , i, aZ, i) over 3 axes, where i is between 1 and N, where N is an integer greater than 1, and processing means including an algorithm designed to process at least a portion of the acceleration measurements ( aX, i, a Y, i, aZ, i) operated by the accelerometer by calculating, for at least a given duration ti, a signal magnitude indicator (SMA, SMV) based on averages calculated from the measurements of acceleration (aX, i, aY, i, aZ, i), and comparing the value of the signal magnitude indicator (SMA, SMV) with a given threshold S to derive a state of rest or activity with: 0.007 g S 0.060 g, and where g is the acceleration constant of gravity (ie 9.81 m / s 2).