St. Jude Medical Ab

Pacesetter Ab

Pacesetter, Inc.

St. Juse Medical Ab

Hans Abrahamson

Magnus Lindberg

Niklas Sköldengen

Tomas Snitting

Mats Arturson

Leif Lindkvist

Stefan Wahlberg

Nils Holmström

Mark William Kroll

Anders Björling

Jan Ljungström

Torbjorn Persson

Hans Andersen

Viktor Skoog

Cecilia Emanuelsson

Magnus Öhman

Therese Danielsson

Jan Ljunström

Leif Lychou

An implantable medical device has a broadband RF receiver operating within an RF band and having stored information of a characteristic receiver frequency representing the RF within the RF band at which the broadband RF receiver has sufficient receiver sensitivity. The stored information is retrieved in response to a message from an external communication device and is included in a response generated by the implantable medical device and transmitted to the communication device. The information enables the communication device to select its transmission frequency at a subsequent transmission instance to the relevant implantable medical device. The chances of successful reception at the subsequent transmission instance are thereby increased.

Implantable medical device adapted for radio frequency telemetry with frequency hopping

A medical transceiver device for radio-based communication with an implantable medical device has circuitry for transmitting radio-frequency signals to, and/or receiving radio-frequency signals from, the implantable medical device, first and second electrically conductive structures, and an antenna feed network operatively interconnected between the circuitry and the first and second conductive structures. Each of the first and second conductive structures is operable as a transmitting and/or receiving antenna for the radio-frequency signals. The first and second conductive structures emit and/or receive radio waves of different polarizations, and the first and second conductive structures are disposed adjacent each other at a single location in space, thereby providing spatial diversity that is independent of the polarization diversity.

Medical transceiver device and method

Hypertension is treated in a patient by implanting an ablation stent in a renal artery of the patient. Energy is transmitted to the ablation stent to induce heating of the ablation stent, which causes ablation of a renal sympathetic nerve present on the outside of the portion of the renal artery comprising the ablation stent. A preferred ablation stent is in the form of an N-turn coil of an electrically conductive wire forming a meander structure. The respective ends of the wire are electrically connected to each other.

Ablation stent with meander structure

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

An implantable medical device has a housing having a first housing surface side, a second housing surface side opposing the first housing surface side, and an intermediate surface side extending between the first and second housing surface sides. The implantable medical device has an antenna device arranged at the first housing surface side, continuing at the intermediate surface side and further at the second housing surface side. Improved radiation characteristics are obtained in a desired direction.

Implantable medical device with an improved antenna

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

An analyte measuring system has an implantable medical device having a signal source arranged for generating a current signal and electrodes for applying the current signal to a surrounding tissue in a subject body. The device measures a resulting voltage signal with the electrodes and calculates an impedance signal therefrom. The system comprises a signal processor arranged for generating an estimate of a concentration of an analyte in the tissue based on a spectrum analysis of the determined impedance signal.

Implantable medical device

A method in a telemetry system for establishing a connection between a base station and an implantable medical device includes the steps of: starting, in the base station, a first timer B-T; determining, in the base station, channels that are free for communication among a number of available channels, and selecting one of the free channels; starting, in the base station, a second timer; transmitting, as long as the first or second timer has not expired, a recognition message on the selected channel to the implantable medical device; and establishing, upon receipt of a recognition reply message from the implantable medical device, communication between the base station and the implantable medical device on the selected channel. The invention is readily adaptable for fulfillment of different requirements, such as stipulated by the ETSI standard.

Medical telemetry system and operating method therefor

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

In a system and method for radio communication between an implantable medical device (IMD) and an external base unit, respectively including transceivers for communication therebetween, the external base unit, according to a predetermined criterion, sends a sleep message to the IMD transceiver, requesting the IMD transceiver to switch power-consuming circuitry in the IMD to a sleep, power-down mode of operation for a predetermined sleep time period.

System and method for radio communication between an implantable medical device and an external base unit

In a method and a system for organizing not yet implanted implantable medical devices, each having a telemetry unit associated therewith, a local administration unit transmits an inquiry signal to at least one of the telemetry units and receives a return signal therefrom in response to the inquiry signal. The return signal establishes the existence of the medical device, and the local administration unit, or a remote external unit in communication with the local administration unit, can then determine a course of action to be taken, such as a recall procedure, invoicing or taking inventory, based on the return signal from the medical device.

Management of implantable devices

In a method for providing software to an implantable medical device system, including an implanted medical device and a presentation unit in communication with each other, a most current version of software for operating one or more of these system units is stored at a server which is remote from the implanted medical device system. Upon each start-up of the presentation unit, a communication link is established between the server and the presentation unit, and information is provided from the presentation unit to the server identifying the software which is respectively currently stored in one or more of the system units. The server determines whether the currently stored software in the system units requires an update and, if so, the server downloads the software version stored at the server to any of the system units which is/are in need of updated software.

Method for providing software to an implantable medical device system

In a medical communication system and method adapted to perform communication between two units, at least one of said units being adapted to be implanted in a human or animal body, having one active channel among a number of communication channels, all of the communication channels are monitored. All channels not presently used for communication between the units, called passive channels, are continuously monitored by the concurrently with the performed communication and the result of this monitoring is stored in a register table provided with one register for each communication channel, the stored information identifying if a channel is available for communication usage.

Growing community of inventors

Stockholm, Sweden

Hans Abrahamson