St. Jude Medical Ab

Niklas Sköldengen

Hans Abrahamson

Leif Lindkvist

Stefan Wahlberg

Jan Ljungström

Therese Danielsson

Jan Ljunström

Leif Lychou

The present invention is directed to an implantable medical device and a method for power management for power efficient use of RF telemetry during, for example, conditions where long periods of continuous monitoring of the device and the patient is desired such as during MRI procedures. A protocol module adapted to, at receipt of a low power protocol indication, activate and use a low power protocol for communication between the device and external units. The protocol module is capable of switching between different communication protocols including a low power communication protocol and a default RF communication protocol depending on, for example, whether continuous long-term monitoring of the patient is performed. During the low power communication protocol, the protocol module is adapted to select parts of stored electrophysical and/or hemodynamical signal waveforms for telemetric transmission and to create communication packages having a predetermined length using the selected parts of the electrophysiological and/or hemodynamical signal waveform. Further, a transmitter is instructed to transmit the communication packages at predetermined transmission intervals and the telemetry module is instructed to power down the transmitter or set the transmitter in a lowest possible activation state during intermediate periods between the transmission intervals.

Methods for low power communication in an implantable medical device

In a method and a system for initiating communication with an implantable medical device to conduct a wireless communication session between the implantable medical device and an external programmer device. A directional antenna is employed for initiating communication between a programmer device and an implantable medical device (IMD). The IMD is targeted by the programmer device by having an operator of the programmer device orient the directional antenna toward the IMD and transmitting a communication-initiating signal from the programmer to the IMD via the directional antenna. The directional antenna has a directional characteristic and communication range. the IMD responds to the communication-initiating signal by sending identification information to the programmer. the programmer may then use this identification to establish a communication session with the IMD targeted by the directional antenna.

Selection of an IMD by means of directional antenna

In a method and system for identifying an implantable medical device (IMD), which is arranged to be disposed in a body, by conducting a telemetry communication session between the implantable medical device and an external programmer device, cardiac data are registered from a point on the body of a patient having an IMD with which a communication session is to be established. The registered cardiac data are compared with one or more sets of intracardiac data pertaining to patients having an IMD implanted and to identify the IMD with which the communication session is to be conducted by the performed comparison.

Identification of an implantable medical device by correlating cardiac related data

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Täby, Sweden

Niklas Sköldengen