WIRELESS CARDIAC PULSATILITY SENSING
First Claim
1. A method, comprising:
- delivering a non-stimulating electrical current using a first dipole located along a first body location and comprising a first electrode and a second electrode;
measuring a voltage signal using a second dipole located at a second body location spaced apart from the first body location, the measured voltage signal corresponding to the electrical current being conducted through a portion of the patient'"'"'s body, the second dipole comprising a third electrode and a fourth electrode different than the first electrode and the second electrode;
computing a pulsatility metric in response to the measured voltage signal; and
detecting a physiological condition in response to the pulsatility metric.
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Accused Products
Abstract
An implantable medical device system and associated method monitor changes in transimpedance in a body tissue due to changes in cardiac pulsatility. A first dipole is used to deliver a non-stimulating electrical current. The first dipole includes a first electrode and a second electrode adapted to be deployed along a first body location. A second dipole is used to measure a voltage resulting from the non-stimulating electrical current being conducted through a portion of a patient'"'"'s body. The second dipole includes a third electrode and a fourth electrode different than the first electrode and the second electrode and adapted to be deployed along a second body location spaced apart from the first body location.
18 Citations
21 Claims
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1. A method, comprising:
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delivering a non-stimulating electrical current using a first dipole located along a first body location and comprising a first electrode and a second electrode; measuring a voltage signal using a second dipole located at a second body location spaced apart from the first body location, the measured voltage signal corresponding to the electrical current being conducted through a portion of the patient'"'"'s body, the second dipole comprising a third electrode and a fourth electrode different than the first electrode and the second electrode; computing a pulsatility metric in response to the measured voltage signal; and detecting a physiological condition in response to the pulsatility metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable medical device system, comprising:
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a first dipole to deliver a non-stimulating electrical current, the first dipole comprising a first electrode and a second electrode adapted to be deployed along a first body location; a second dipole to measure a voltage signal resulting from the non-stimulating electrical current being conducted through a portion of a patient'"'"'s body;
the second dipole comprising a third electrode and a fourth electrode different than the first electrode and the second electrode and adapted to be deployed along a second body location spaced apart from the first body location; anda processor configured to compute a pulsatility metric in response to the measured voltage signal and to detect a physiological condition in response to the pulsatility metric. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer-readable medium storing a set of instructions which cause a processor of a medical device system to:
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control the delivery of a non-stimulating electrical current using a first dipole located along a first body location and comprising a first electrode and a second electrode; measure a voltage signal using a second dipole located at a second body location spaced apart from the first body location, the voltage corresponding to the electrical current being conducted through a portion of the patient'"'"'s body, the second dipole comprising a third electrode and a fourth electrode different than the first electrode and the second electrode; compute a pulsatility metric in response to the measured voltage; and detect a physiological condition in response to the pulsatility metric.
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Specification