Night respiration rate for heart failure monitoring
First Claim
1. A monitoring device for monitoring and analyzing physiological signals comprising:
- a transthoracic impedance measurement unit;
an evaluation unit connected to said transthoracic impedance measurement unit;
said transthoracic impedance measurement unit configured to conduct a transthoracic impedance measurement and to generate a transthoracic impedance signal that represents a measured transthoracic impedance at consecutive points in time;
said evaluation unit configured to process said transthoracic impedance signal received from said transthoracic impedance measurement unit and to thus generate a respiration signal and to generate therefrom an evaluation signal that reflects at least a diurnal pattern of a respiration rate;
a sensing unit configured to process an EGM signal that represents intracardiac myocardial electric potentials and determine therefrom a heart rate signal;
wherein said evaluation unit is configured to perform a trending analysis of multiple different physiological parameters, comprising a heart rate, a heart rate variability and said respiratory rate;
wherein said evaluation unit is configured to determine overall statistics of a respiration rate signal; and
,wherein said evaluation unit is configured to determine a composite score from said multiple different physiological parameters;
wherein said evaluation unit is configured to determine said composite score as follows;
CS=a*rRR+b/dRR+c*rHR+d/HRV,where a, b, c, and d are predefined non-negative coefficients, rRR is a resting respiration rate, dRR is a difference between day and night respiration rates, rHR is a resting heart rate, and HRV is an index of 24-hour heart rate variability.
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Abstract
The invention refers to a monitoring device for monitoring and analyzing physiological signals. The monitoring device comprises a transthoracic impedance measurement unit and an evaluation unit connected to the transthoracic impedance measurement unit. The transthoracic impedance measurement unit is adapted to conduct a transthoracic impedance measurement and to generate a transthoracic impedance signal representing a measured transthoracic impedance at consecutive points in time. The evaluation unit being configured to process the transthoracic impedance signal received from the transthoracic impedance measurement unit and to thus generate a respiration signal and to generate therefrom an evaluation signal reflecting at least a diurnal pattern of the respiration rate.
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Citations
15 Claims
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1. A monitoring device for monitoring and analyzing physiological signals comprising:
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a transthoracic impedance measurement unit; an evaluation unit connected to said transthoracic impedance measurement unit; said transthoracic impedance measurement unit configured to conduct a transthoracic impedance measurement and to generate a transthoracic impedance signal that represents a measured transthoracic impedance at consecutive points in time; said evaluation unit configured to process said transthoracic impedance signal received from said transthoracic impedance measurement unit and to thus generate a respiration signal and to generate therefrom an evaluation signal that reflects at least a diurnal pattern of a respiration rate; a sensing unit configured to process an EGM signal that represents intracardiac myocardial electric potentials and determine therefrom a heart rate signal; wherein said evaluation unit is configured to perform a trending analysis of multiple different physiological parameters, comprising a heart rate, a heart rate variability and said respiratory rate; wherein said evaluation unit is configured to determine overall statistics of a respiration rate signal; and
,wherein said evaluation unit is configured to determine a composite score from said multiple different physiological parameters;
wherein said evaluation unit is configured to determine said composite score as follows;
CS=a*rRR+b/dRR+c*rHR+d/HRV,where a, b, c, and d are predefined non-negative coefficients, rRR is a resting respiration rate, dRR is a difference between day and night respiration rates, rHR is a resting heart rate, and HRV is an index of 24-hour heart rate variability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A monitoring device for monitoring and analyzing physiological signals comprising:
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a transthoracic impedance measurement unit; an evaluation unit connected to said transthoracic impedance measurement unit; said transthoracic impedance measurement unit configured to conduct a transthoracic impedance measurement and to generate a transthoracic impedance signal that represents a measured transthoracic impedance at consecutive points in time; said evaluation unit configured to process said transthoracic impedance signal received from said transthoracic impedance measurement unit and to thus generate a respiration signal and to generate therefrom an evaluation signal that reflects at least a diurnal pattern of a respiration rate; wherein said evaluation unit is configured to determine a composite score from multiple different physiological parameters; and
,wherein said evaluation unit is configured to determine said composite score as follows;
CS=a*rRR+b/dRR+c*rHR+d/HRV,where a, b, c, and d are predefined non-negative coefficients, rRR is a resting respiration rate, dRR is a difference between day and night respiration rates, rHR is a resting heart rate, and HRV is an index of 24-hour heart rate variability.
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Specification