Active Implantable Medical Device Integrating Spirometric Means for Diagnosing Lung Diseases
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United States of America Patent
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Issued Date -
May 6, 2010
app pub date -
Nov 6, 2009
filing date -
Nov 6, 2008
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Abandoned
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Abstract
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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