Patent ID: 8795189

Claim:
A system for determining pulmonary performance from transthoracic impedance measures, comprising: an implantable medical device comprising a transthoracic impedance sensor configured to record one or more physiological measurements comprising transthoracic impedance measures; a correlation component to correlate the physiological measurements to pulmonary functional measures, wherein the pulmonary functional measures are selected from forced vital capacity (FVC), forced expiratory volume (FEV), FEV to FVC ratio and combinations thereof; a database module configured to store the correlated physiological measurements; and an evaluation component to evaluate pulmonary performance, the evaluation component comprising: an analysis subcomponent to determine differences in pulmonary performance by comparing the correlated physiological measurements to previously correlated and stored physiological measurements including physiological measurements taken during an initial observation period in which the transthoracic impedance sensor is calibrated and a baseline is established for the transthoracic impedance sensor; and an identification module to identify a trend from the differences; a processor programmed with the above components.