Method and apparatus of acoustic communication for implantable medical device
First Claim
1. An implantable medical device adapted to be communicatively coupled to a second medical device, the implantable medical device comprising:
- a cardiac rhythm management (CRM) device;
an acoustic transducer configured to be an acoustic coupler for acoustic communication between the implantable medical device and the second medical device;
an acoustic communication circuit coupled to the CRM device and the acoustic transducer and including;
a data receiver circuit adapted to receive and demodulate an incoming acoustic signal and including an error detector, the incoming acoustic signal including a first carrier signal modulated by incoming data, the error detector adapted to detect an error rate of the demodulated incoming acoustic signal;
a data transmitter circuit adapted to modulate and transmit an outgoing acoustic signal and including a variable-frequency waveform generator, the outgoing acoustic signal including a second carrier signal modulated by outgoing data, the variable-frequency waveform generator adapted to generate the second carrier signal with a programmable carrier frequency; and
a frequency selection circuit adapted to adjust the carrier frequency using the error rate; and
an implantable housing configured to contain the CRM device and the acoustic communication circuit,wherein the acoustic transducer is fastened to the implantable housing.
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Abstract
An implantable medical device includes an acoustic transducer for intra-body communication with another medical device via an acoustic couple. The acoustic transducer includes one or more piezoelectric transducers. In one embodiment, an implantable medical device housing contains a cardiac rhythm management (CRM) device and an acoustic communication circuit. The acoustic transducer is electrically connected to the acoustic communication circuit to function as an acoustic coupler and physically fastened to a wall of the implantable housing, directly or via a supporting structure. In one embodiment, the implantable medical device receives an incoming acoustic signal from the other medical device, detects an error rate associated with the incoming acoustic signal, and adjusts a carrier frequency for an outgoing acoustic signal to be transmitted to the other medical device using the error rate.
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Citations
20 Claims
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1. An implantable medical device adapted to be communicatively coupled to a second medical device, the implantable medical device comprising:
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a cardiac rhythm management (CRM) device; an acoustic transducer configured to be an acoustic coupler for acoustic communication between the implantable medical device and the second medical device; an acoustic communication circuit coupled to the CRM device and the acoustic transducer and including; a data receiver circuit adapted to receive and demodulate an incoming acoustic signal and including an error detector, the incoming acoustic signal including a first carrier signal modulated by incoming data, the error detector adapted to detect an error rate of the demodulated incoming acoustic signal; a data transmitter circuit adapted to modulate and transmit an outgoing acoustic signal and including a variable-frequency waveform generator, the outgoing acoustic signal including a second carrier signal modulated by outgoing data, the variable-frequency waveform generator adapted to generate the second carrier signal with a programmable carrier frequency; and a frequency selection circuit adapted to adjust the carrier frequency using the error rate; and an implantable housing configured to contain the CRM device and the acoustic communication circuit, wherein the acoustic transducer is fastened to the implantable housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating an implantable medical device adapted to be communicatively coupled to a second medical device, the method comprising:
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receiving from the second medical device an incoming acoustic signal including a first carrier signal modulated by incoming data; demodulating the incoming acoustic signal; detecting an error rate of the demodulated incoming acoustic signal; generating a second carrier signal having a programmable carrier frequency; modulating the second carrier signal with outgoing data; transmitting an outgoing acoustic signal including the modulated second carrier signal to the second medical device; and adjusting the carrier frequency using the error rate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification