Cardiac Pacemakers, Inc.

Karen M Kramer

Thomas J Harris

Allan Thomas Koshiol

Joseph E Bange

Paul Jeffrey Holmquist

Scott Thomas Mazar

Jeffrey Allen Von Arx

David J Yonce

Douglas J Brandner

Doug Gifford

Methods and systems for media access control allow master and slave nodes of a network to communicate using the same carrier while avoiding collisions of transmissions. At least one slave node is an implantable device. Master nodes initiate all data exchange sequences, and slave nodes are responsive to the data exchange sequences. The exchange sequences begin by master nodes contending for use of the carrier through a countdown procedure. A set order of communications occurs between a master node who won the contention and a slave node being communicated with by the master node to transfer a data frame. Contention is then repeated to determine the next master node that is allowed to transfer a data frame. New master nodes entering the network employ a discovery process to poll for existing devices in the network.

Methods and systems for providing multiple access within a network

A method comprises connecting at least one portion of a far-field radio-frequency (RF) first telemetry circuit in an implantable medical device to an energy source through a power connection module, detecting information included in a first predetermined wireless signal, changing a conductivity state of the power connection module when the information in the first predetermined wireless signal is detected to couple power to the at least one portion of the first telemetry circuit, detecting a second predetermined wireless signal, and changing a conductivity state of the power connection module to decouple power to the at least one portion of the first telemetry circuit when the second predetermined wireless signal is detected and the first telemetry circuit enters an idle state.

Methods and apparatuses for implantable medical device telemetry power management

A telemetry system is presented for enabling wireless communications between an implantable medical device and an external device in a manner which reduces the power requirements of the implantable device by duty cycling its wireless communication circuitry. A wakeup scheme for the implantable device is provided in which the external device transmits a data segment containing a repeating sequence of special wakeup characters in order to establish a communications session with the implantable device. The wakeup scheme may be designed to operate in the context of a handshaking protocol for collision avoidance.

System and method for RF wake-up of implantable medical device

A telemetry system is presented for enabling radio-frequency (RF) communications between an implantable medical device and an external device in a manner which reduces the power requirements of the implantable device by duty cycling its circuitry. A wakeup scheme for the implantable device is provided in which the external device transmits a data segment containing a repeating sequence of special wakeup characters in order to establish a communications session with the implantable device. The wakeup scheme may be designed to operate in the context of a handshaking protocol for collision avoidance.

An implantable medical device comprising a plurality of implantable electrodes to sense the electrical activity and an implantable medical device coupled to the electrodes. The implantable medical device includes a plurality of sense amplifiers in communication with the electrodes to produce analog electronic signals representative of the electrical activity and a programmable sampler. The implantable medical device also includes a controller that programmably enables the sampler to selectively sample the electronic signals. The controller also includes memory in communication with the controller for storage of the sample values. The controller configures the memory based on the programmable sampling.

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Stillwater, MN, United States of America

Karen M Kramer