Time-varying spatial signals are detected by accelerometers mounted within the patient. The signals, representative of the actual 3-D trajectory of the patient, are compared with information representative of expected trajectories retrieved from memory to identify a current patient posture, which may...http://www.google.es/patents/US7149579?utm_source=gb-gplus-sharePatente US7149579 - System and method for determining patient posture based on 3-D trajectory using an implantable medical device
System and method for determining patient posture based on 3-D trajectory ...