US 6,937,900 B1 · AC/DC multi-axis accelerometer for determining patient activity and body position

Abstract

An implantable cardiac stimulation device which determines stimulation based upon the patient's body position and activity level while eliminating special implantation or calibration procedures. To eliminate such special implantation and calibration procedures, the stimulation device correlates the patient's body position using a multi-axis DC accelerometer or other sensor during times of high activity and determines a patient's standing position value. During other times, the stimulation device compares the signals from the accelerometer to the standing position value to determine the patient's current body position. Based upon the current body position and the activity level, the stimulation device determines the necessary stimulation to deliver to the patient.

Claims18

Dependent claims

A cardiac stimulation device comprising:

means for sensing activity level and body position and for generating signals indicative of activity level and body position of a patient's body;
and
a controller that is adapted to be coupled to the means for sensing to receive the activity and position signals, wherein the controller is operative to process the activity and position signals to determine a standing position during an initial phase, and that, in a subsequent phase, is operative to compare the activity and position signals with the determined standing position to determine a patient position.

Dependencies are inferred from the claim text.

AC/DC multi-axis accelerometer for determining patient activity and body position

Life of this patent

AC/DC multi-axis accelerometer for determining patient activity and body position

Life of this patent

Abstract

Claims18