Using respiration distress manifestations for heart failure detection
First Claim
1. A system comprising:
- an implantable medical device including,a respiration sensor circuit configured for producing a respiration signal indicative of a respiration or a respiration related parameter of a subject; and
a physiological sensor circuit that includes at least one of a physical activity sensor circuit configured for producing a physical activity signal indicative of a physical activity level of the subject or a posture sensor circuit configured for producing a posture signal indicative of a posture of the subject; and
an implantable or external processor circuit including an input to receive information about the respiration signal and at least one of the physical activity signal or the posture signal, the processor circuit configured for detecting a paroxysmal nocturnal dyspnea (PND) event by detecting a respiration disturbance using the respiration signal and detecting an associated subsequent arousal from stable state occurrence caused by the respiration disturbance, from at least one of the physical activity signal or the posture signal, the processor circuit further configured for evaluating over time, at least in part, the respiration disturbances and the associated subsequent arousal from stable state occurrences caused by the respiration disturbance by comparing a trend or count of the respiration disturbances and the associated arousal from stable state occurrences to a specified threshold, providing an indication of present or impending worsening heart failure.
1 Assignment
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Accused Products
Abstract
Systems and methods for diagnosing one or more respiration distress manifestations by implantably recognizing their occurrence and evaluating information about the same to provide an indication of present or impending worsening heart failure are discussed. Using information produced by an implantable respiration sensor circuit and an implantable physiological sensor circuit, such as at least one of a physical activity sensor circuit or a posture sensor circuit, an implantable or external processor circuit may detect a respiration disturbance and an associated subsequent arousal from stable state occurrence and thereafter evaluate over time arousal from stable state occurrences to provide the indication of present or impending worsening heart failure. In one example, information about a fluid level within a subject is used in determining the indication of worsening heart failure. In various examples, a regimen is initiated or adjusted in response to the indication of present or impending worsening heart failure.
16 Citations
20 Claims
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1. A system comprising:
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an implantable medical device including, a respiration sensor circuit configured for producing a respiration signal indicative of a respiration or a respiration related parameter of a subject; and a physiological sensor circuit that includes at least one of a physical activity sensor circuit configured for producing a physical activity signal indicative of a physical activity level of the subject or a posture sensor circuit configured for producing a posture signal indicative of a posture of the subject; and an implantable or external processor circuit including an input to receive information about the respiration signal and at least one of the physical activity signal or the posture signal, the processor circuit configured for detecting a paroxysmal nocturnal dyspnea (PND) event by detecting a respiration disturbance using the respiration signal and detecting an associated subsequent arousal from stable state occurrence caused by the respiration disturbance, from at least one of the physical activity signal or the posture signal, the processor circuit further configured for evaluating over time, at least in part, the respiration disturbances and the associated subsequent arousal from stable state occurrences caused by the respiration disturbance by comparing a trend or count of the respiration disturbances and the associated arousal from stable state occurrences to a specified threshold, providing an indication of present or impending worsening heart failure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification