System, methods and apparatus for waking an autonomous active implantable medical device communicating by pulses transmitted through the interstitial tissues of the body
First Claim
1. A system for wireless communication between at least two active medical devices in which at least one active medical device is a transmitter device and at least one active implantable medical device is a receiver device, wherein:
- the transmitter device comprises a first pair of electrodes and a transmitter means for generating a modulated pulse train comprising a wake-up plurality of pulses in a series corresponding to a communication to the receiver device, and a wake-up signal preceding said modulated pulse train, said wake-up signal having a predetermined characteristic pulse pattern, and for applying said wake-up signal and modulated pulse train to said first pair of electrodes; and
the receiver device comprises an energy source, at least one active circuit element, a second pair of electrodes, and a receiver means for collecting a received signal at said first pair of electrodes and processing said received signal to identify therein a received wake-up signal and modulated pulse train corresponding to said wake-up signal and modulated pulse train from said transmitter means, and means for demodulating said received modulated pulse train into a received pulse train corresponding to said wake-up plurality of pulses;
wherein said receiver means further comprises means for selectively switching said at least one active circuit element between a sleep state not powered by said energy source and an operational state powered for processing said received signal using said at least one active circuit element; and
,wake-up circuit means for discriminating said received wake-up signal having said predetermined characteristic pulse pattern, and in response, switching the receiver means from the sleep state to the operational state, wherein;
said wireless communication is an intracorporeal communication of electrical pulses conducted by the interstitial tissues of a patient'"'"'s body; and
the wake-up circuit means comprises a detector circuit and a hysteresis comparator.
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Accused Products
Abstract
An autonomous active medical implantable device, with a power supply and a wake-up circuit that responds to receipt of specific pulses transmitted through the interstitial tissues of the body. A transmitter device (40) generates trains of modulated pulses applied to electrodes (22, 24), and a receiver (50) processes (e.g., filter, amplify and demodulate) pulses collected on electrodes (22′, 24′). The receiver circuits (50) are selectively activated from a dormant (sleep) state in which they are not powered by a power source (34), to an operational (active) state in which they are powered and able to process (e.g., filter, amplify and demodulate) the collected pulses. A specific wake-up pulse train, configured in a predetermined characteristic pulse pattern, triggers passive wake-up circuits (66) in the receiver (50) to switch the receiver circuits from the sleep state to the operational state.
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Citations
26 Claims
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1. A system for wireless communication between at least two active medical devices in which at least one active medical device is a transmitter device and at least one active implantable medical device is a receiver device, wherein:
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the transmitter device comprises a first pair of electrodes and a transmitter means for generating a modulated pulse train comprising a wake-up plurality of pulses in a series corresponding to a communication to the receiver device, and a wake-up signal preceding said modulated pulse train, said wake-up signal having a predetermined characteristic pulse pattern, and for applying said wake-up signal and modulated pulse train to said first pair of electrodes; and the receiver device comprises an energy source, at least one active circuit element, a second pair of electrodes, and a receiver means for collecting a received signal at said first pair of electrodes and processing said received signal to identify therein a received wake-up signal and modulated pulse train corresponding to said wake-up signal and modulated pulse train from said transmitter means, and means for demodulating said received modulated pulse train into a received pulse train corresponding to said wake-up plurality of pulses; wherein said receiver means further comprises means for selectively switching said at least one active circuit element between a sleep state not powered by said energy source and an operational state powered for processing said received signal using said at least one active circuit element; and
,wake-up circuit means for discriminating said received wake-up signal having said predetermined characteristic pulse pattern, and in response, switching the receiver means from the sleep state to the operational state, wherein; said wireless communication is an intracorporeal communication of electrical pulses conducted by the interstitial tissues of a patient'"'"'s body; and the wake-up circuit means comprises a detector circuit and a hysteresis comparator. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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3. The system of claim h wherein said wake-up signal comprises a biphasic pulse and said modulated pulse train further comprises a biphasic pulse train, each biphasic pulse having a positive alternation and a negative alternation.
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14. An autonomous active implantable medical device having wireless communications with a remote active medical device, having a receiver device comprising:
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an energy source; at least one active circuit element; a pair of electrodes; a receiver means for collecting a signal at said pair of electrodes and processing said received signal to identify therein a wake-up signal and a received modulated pulse train, said receiver means further comprising means for demodulating said received modulated pulse train into a received pulse train and identifying in said received pulse train a plurality of pulses; means for selectively switching said at least one active circuit element between a sleep state not powered by said energy source and an operational state powered for processing said signal using said at least one active circuit element; and
,wake-up circuit means for discriminating said received signal and identifying therein a first signal having a predetermined characteristic pulse pattern and corresponding to a stored wake-up value, and in response, switching the receiver means from the sleep state to the operational state, wherein; said signal further comprises an intracorporeal communication of electrical pulses conducted by the interstitial tissues of a patient'"'"'s body; and the wake-up circuit means further comprises a detector circuit and a hysteresis comparator. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification