Patent ID: 7186220

Claim:
An apparatus comprising: an implantable housing, the implantable housing comprising: a thoracic monitor circuit, including an output to provide time domain thoracic information; a signal processor circuit, the signal processor circuit comprising: a time-to-frequency domain converter circuit, including an input coupled to the thoracic monitor circuit output to receive the time domain thoracic information, and including an output providing frequency domain thoracic information; and a spectrum analyzer circuit, including a input coupled to the time-to-frequency domain converter circuit output to receive the frequency domain thoracic information, and including an output to provide a classification of a pulmonary physiological state using a respiration component of the frequency-domain thoracic information, the classification of the pulmonary physiological state indicative of at least one of pulmonary obstructive disease, a restrictive respiration disease, rapid shallow non-periodic respiration, and respiration having decreased inhalation duration and increased exhalation duration.