A system includes an implantable medical device that includes a trans-thoracic impedance measurement circuit providing a trans-thoracic impedance signal of a subject. A controller is coupled to the trans-thoracic impedance circuit. The controller extracts a respiration signal from the trans-thoracic...http://www.google.es/patents/US7603170?utm_source=gb-gplus-sharePatente US7603170 - Calibration of impedance monitoring of respiratory volumes using thoracic D.C. impedance
Calibration of impedance monitoring of respiratory volumes using thoracic D ...
