BLOOD PRESSURE MEASUREMENT WITH IMPLANTABLE MEDICAL DEVICE
First Claim
1. An implantable medical device comprising:
- a lead connecting arrangement configured to be connected to a cardiac lead to be implanted in or in connection with a ventricle of a heart of a patient and comprising a cardiomechanic sensor configured to generate a deformation signal representative of the myocardial deformation;
a derivative calculator configured to generate a deformation rate signal representative of rate of said myocardial deformation by calculating the derivative of said deformation signal with respect to time;
a signal filter unit configured to filter said deformation rate signal to get a filtered deformation rate signal;
a peak identifier configured to identify respective maximum deformation rate values in said filtered deformation rate signal for multiple cardiac cycles; and
a pressure calculator configured to calculate a value representative of systemic blood pressure of said patient based on a combination of said respective maximum deformation rate values identified by said peak identifier.
1 Assignment
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Accused Products
Abstract
An implantable medical device is connected to a cardiomechanic sensor implanted in or in connection with a cardiac ventricle. The sensor generates a deformation signal representative of the myocardial deformation. The implantable medical device processes the deformation signal by calculating the derivative thereof to generate a deformation rate signal representative of the rate of myocardial deformation. The deformation rate signal is filtered and respective maximum deformation rate values are identified for multiple cardiac cycles in the filtered deformation rate signal. A value representative of the systemic blood pressure is calculated based on a combination of the respective maximum deformation rate values.
5 Citations
17 Claims
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1. An implantable medical device comprising:
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a lead connecting arrangement configured to be connected to a cardiac lead to be implanted in or in connection with a ventricle of a heart of a patient and comprising a cardiomechanic sensor configured to generate a deformation signal representative of the myocardial deformation; a derivative calculator configured to generate a deformation rate signal representative of rate of said myocardial deformation by calculating the derivative of said deformation signal with respect to time; a signal filter unit configured to filter said deformation rate signal to get a filtered deformation rate signal; a peak identifier configured to identify respective maximum deformation rate values in said filtered deformation rate signal for multiple cardiac cycles; and a pressure calculator configured to calculate a value representative of systemic blood pressure of said patient based on a combination of said respective maximum deformation rate values identified by said peak identifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for estimating systemic blood pressure of a patient having an implantable medical device connected to a cardiac lead implanted in or in connection with a ventricle of a heart of said patient and comprising a cardiomechanic sensor configured to generate a deformation signal representative of the myocardial deformation, said method comprising:
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generating a deformation rate signal representative of rate of said myocardial deformation by calculating the derivative of said deformation signal with respect to time; filtering said deformation rate signal to get a filtered deformation rate signal; identifying respective maximum deformation rate values in said filtered deformation rate signal for multiple cardiac cycles; and calculating a value representative of systemic blood pressure of said patient based on a combination of said respective maximum deformation rate values. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification