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Implantable Medical Device Orientation Detection Utilizing an External Magnet and a 3D Accelerometer Sensor

  • US 20100010338A1
  • Filed: 09/30/2008
  • Published: 01/14/2010
  • Est. Priority Date: 07/08/2008
  • Status: Abandoned Application
First Claim
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1. A method of determining the orientation of an implantable medical device, comprising:

  • determining a y-axis orientation of the device using accelerometer signals from a 3D accelerometer positioned within the device using gravity as an external force;

    determining an z-axis orientation of the device based on properties of a magnetic field between a magnetic sensor positioned within the device and an external magnet; and

    determining an x-axis orientation of the device from an orthogonal transformation calculation using the previously determined y-axis and z-axis orientations.

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