Telemetry method and apparatus for ambulatory medical device
AssigneeAdvanced Bioics Corporation
InventorsBrian Shelton, Sam Bowman
Life of this patent
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Abstract
A medical system including an implantable battery operated therapy device and an external communication device configured for wireless communication in a manner to minimize energy consumption in the implanted device. The medical device is configured to wake periodically from a sleep state to look for a message preamble from the communication device. The preamble is formatted to include control information, e.g., information indicating the time of receipt of the forthcoming message.
Claims22
A medical system comprising:
- a communication device (CD) including a CD telemetry subsystem selectively operable in a first state to transmit a preamble signal or a second state to transmit a message signal and wherein said preamble signal includes information predicting the time duration to the next message signal;
- and
- a medical device (MD) including an MD telemetry subsystem operable in either a signal receiving state or a low energy consuming state and wherein said MD telemetry subsystem in said signal receiving state is responsive to said information predicting time duration for switching to said low energy consuming state for a time interval related to said predicted time duration.
A method of operating a battery powered implantable medical device, responsive to RF message signals from an external communication device, so as to minimize power consumption in said medical device, said method comprising:
- configuring said medical device so that it normally operates in a low energy consuming state and periodically switches to a signal receiving state for a limited duration listening window;
- operating said communication device to transmit an RF preamble signal prior to transmission of each RF message signal;
- encoding in said preamble signal information predicting the time duration to the next message signal;
- causing said medical device during a signal receiving state to decode said predicting information to determine the time duration to the next message signal;
- and
- switching said medical device to said low energy consuming state for a time interval related to said determined time duration.
A medical system comprising:
- At least one medical device (MD) including an MD power source, an MD therapeutic subsystem, and MD telemetry subsystem, and a programmable MD processor for controlling the operation of said MD therapeutic subsystem and/or said MD telemetry subsystem;
- and
- a communication device (CD) including a CD telemetry subsystem selectively operable to transmit a preamble signal to said MD telemetry subsystem or to transmit a message signal to said MD telemetry subsystem, and wherein control information is embedded in said preamble signal for processing by said MD processor to minimize power consumption in said medical device.
Dependencies are inferred from the claim text.