Broadband acoustic sensor for an implantable medical device
First Claim
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1. An implantable medical device (IMD) comprising:
- a pulse generator having a housing and a compartment, the compartment being disposed on an outer surface of a wall of the housing and defining an isolated, hermetically sealed cavity bounded by a back wall;
a compartment diaphragm with a resonance frequency greater than about 20 kHz disposed over and enclosing the cavity, the isolated cavity having an inner surface;
an acoustic sensor having a sensor diaphragm, the sensor adapted to sense chest sounds having a frequency from about 10 Hz to about 20 kHz and generate a signal, the sensor disposed on an inner surface of the compartment diaphragm; and
a control circuit disposed within the housing, the circuit operatively coupled to the acoustic sensor and adapted to receive the signal.
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Abstract
An implantable medical device (IMD) is adapted for detecting acoustic chest sounds. The IMD includes a pulse generator having a compartment, the compartment defining an isolated cavity bounded by a back wall. A diaphragm is disposed over and encloses the cavity. An acoustic sensor adapted to sense chest sounds and generate a signal is disposed between the diaphragm and the back wall. The IMD also includes a control circuit disposed within the pulse generator. The circuit is operatively coupled to the acoustic sensor and is adapted to receive the signal.
170 Citations
27 Claims
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1. An implantable medical device (IMD) comprising:
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a pulse generator having a housing and a compartment, the compartment being disposed on an outer surface of a wall of the housing and defining an isolated, hermetically sealed cavity bounded by a back wall; a compartment diaphragm with a resonance frequency greater than about 20 kHz disposed over and enclosing the cavity, the isolated cavity having an inner surface; an acoustic sensor having a sensor diaphragm, the sensor adapted to sense chest sounds having a frequency from about 10 Hz to about 20 kHz and generate a signal, the sensor disposed on an inner surface of the compartment diaphragm; and a control circuit disposed within the housing, the circuit operatively coupled to the acoustic sensor and adapted to receive the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A cardiac function management (CFM) system for effecting operation of a human heart, the system comprising:
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a pulse generator having a housing and a compartment, the compartment being disposed on an outer surface of a wall of the housing and defining an isolated, hermetically sealed cavity bounded by a back wall; a compartment diaphragm with a resonance frequency greater than about 20 kHz disposed over and enclosing the cavity, the isolated cavity having an inner surface; an acoustic sensor having a sensor diaphragm, the sensor adapted to sense chest sounds having a frequency from about 10 Hz to about 20,000 Hz and generate a first signal, the sensor disposed on an inner surface of the compartment diaphragm; a cardiac lead having an electrode and adapted to sense electrical activity of the heart; and a control circuit disposed within the pulse generator, the circuit operatively coupled to the acoustic sensor and the cardiac lead. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification