Method and apparatus for monitoring heart failure patients with cardiopulmonary comorbidities
First Claim
1. A system for detecting cardiopulmonary conditions, comprising:
- a parameter input to receive parameters indicative of a plurality of cardiopulmonary conditions, the parameters including a forced vital capacity (FVC) parameter, a forced expiratory volume (FEV) parameter, and one or more edema-indicating parameters indicative of cardiogenic pulmonary edema;
a pulmonary edema detector coupled to the parameter input, the pulmonary edema detector adapted to detect the cardiogenic pulmonary edema based on the one or more edema- indicating parameters;
a low FVC detector coupled to the pulmonary edema detector, and adapted to detect low FVC if the pulmonary edema detector does not indicate a detection of the cardiogenic edema, the low FVC detector including a comparator having an output indicating a detection of the low FVC when the FVC parameter is below a predetermined threshold FVC parameter value; and
a pulmonary condition detector coupled to the low FVC detector, the pulmonary condition detector adapted to detect at least an obstructive pulmonary disease and a restrictive pulmonary disease based on the FVC parameter and the FEV parameter if the low FVC is detected.
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Abstract
A system receives signals indicative of cardiopulmonary conditions sensed by a plurality of sensors and provides for monitoring and automated differential diagnosis of the cardiopulmonary conditions based on the signals. Cardiogenic pulmonary edema is detected based on one or more signals sensed by implantable sensors. If the cardiogenic pulmonary edema is not detected, obstructive pulmonary disease and restrictive pulmonary disease are each detected based on a forced vital capacity (FVC) parameter and a forced expiratory volume (FEV) parameter measured from a respiratory signal sensed by an implantable or non-implantable sensor. In one embodiment, an implantable medical device senses signals indicative of the cardiopulmonary conditions, and an external system detects the cardiopulmonary conditions based on these signals by executing an automatic detection algorithm.
168 Citations
21 Claims
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1. A system for detecting cardiopulmonary conditions, comprising:
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a parameter input to receive parameters indicative of a plurality of cardiopulmonary conditions, the parameters including a forced vital capacity (FVC) parameter, a forced expiratory volume (FEV) parameter, and one or more edema-indicating parameters indicative of cardiogenic pulmonary edema; a pulmonary edema detector coupled to the parameter input, the pulmonary edema detector adapted to detect the cardiogenic pulmonary edema based on the one or more edema- indicating parameters; a low FVC detector coupled to the pulmonary edema detector, and adapted to detect low FVC if the pulmonary edema detector does not indicate a detection of the cardiogenic edema, the low FVC detector including a comparator having an output indicating a detection of the low FVC when the FVC parameter is below a predetermined threshold FVC parameter value; and a pulmonary condition detector coupled to the low FVC detector, the pulmonary condition detector adapted to detect at least an obstructive pulmonary disease and a restrictive pulmonary disease based on the FVC parameter and the FEV parameter if the low FVC is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification