LEADLESS INTRA-CARDIAC MEDICAL DEVICE WITH INTEGRATED L-C RESONANT CIRCUIT PRESSURE SENSOR
First Claim
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1. A leadless intra-cardiac medical device, comprising:
- a housing comprising an exterior surface and defining an interior space;
an inductor-capacitor resonant circuit located within the interior space defined by the housing, wherein the inductor-capacitor circuit comprises an inductive circuit and a flexible capacitive circuit electrically coupled in parallel;
a flexible material located adjacent the exterior surface of the housing and engaged with the flexible capacitive circuit to couple pressure waves to the flexible capacitive circuit;
at least one electrode located adjacent the exterior surface of the housing; and
a circuit located within the interior space defined by the housing and electrically coupled to the inductor-capacitor resonant circuit and to the at least one electrode, wherein the circuit is configured to;
process signals received from the inductor-capacitor resonant circuit to generate data representative of the pressure waves,generate cardiac stimulation pulses for application via the at least one electrode based on control information, andcommunicate via radiofrequency signaling with an external device to send the data to the external device and to receive the control information from the external device.
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Abstract
A leadless intra-cardiac medical device comprises an integrated L-C resonant circuit pressure sensor. In some embodiments, the pressure sensor comprises a passive sensor that measures pressure in response to an externally generated excitation signal. In some embodiments, the pressure sensor comprises an active sensor that measures pressure in response to an internally generated excitation signal.
128 Citations
21 Claims
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1. A leadless intra-cardiac medical device, comprising:
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a housing comprising an exterior surface and defining an interior space; an inductor-capacitor resonant circuit located within the interior space defined by the housing, wherein the inductor-capacitor circuit comprises an inductive circuit and a flexible capacitive circuit electrically coupled in parallel; a flexible material located adjacent the exterior surface of the housing and engaged with the flexible capacitive circuit to couple pressure waves to the flexible capacitive circuit; at least one electrode located adjacent the exterior surface of the housing; and a circuit located within the interior space defined by the housing and electrically coupled to the inductor-capacitor resonant circuit and to the at least one electrode, wherein the circuit is configured to; process signals received from the inductor-capacitor resonant circuit to generate data representative of the pressure waves, generate cardiac stimulation pulses for application via the at least one electrode based on control information, and communicate via radiofrequency signaling with an external device to send the data to the external device and to receive the control information from the external device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18)
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10. (canceled)
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19. A pressure sensing method, comprising:
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triggering an excitation circuit of a leadless intra-cardiac medical device to excite an inductor-capacitor resonant circuit of the leadless intra-cardiac medical device, wherein a flexible material located adjacent an exterior surface of a housing is engaged with a capacitive circuit of the inductor-capacitor resonant circuit to couple pressure waves to the capacitive circuit; processing signals produced by the excited inductor-capacitor resonant circuit to determine at least one frequency of the signals; generating data representative of pressure external to the leadless intra-cardiac medical device based on the determined at least one frequency; and transmitting the generated data via radiofrequency signaling to an external device. - View Dependent Claims (20, 21)
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Specification