| 摘要 |
An active implantable medical device, integrating a spirometric function for the diagnosis of lung diseases is disclosed. The active implantable medical device measures the respiratory activity of a patient to collect a transthoracic impedance signal according to changes in lung volume. The active implantable medical device comprises a spirometer function produces, from the transthoracic impedance signal collected over a respiratory cycle, a characteristic curve that couples of flow values (dV/dt) as a function of pulmonary volume (V) that represents a spirometric characteristic (S) of a patient. An spirometric analysis is performed to deduce from the spirometric characteristic (S) at least one parameter of the patient's pulmonary status and to produce a diagnostic indicator based on the comparison of the at least one parameter with a predetermined reference value.
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