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US 6,574,510 B2Granted
Telemetry apparatus and method for an implantable medical device
AssigneeCardiac Pacemakers, Inc.
InventorsJeffrey A. Von Arx, Mark D. Amundson, William R. Mass, Ron Balczewski, William J. Linder
Life of this patent
Estimating the term…
Abstract
An apparatus and method for enabling radio-frequency communications with an implantable medical device utilizing far-field electromagnetic radiation. Such radio-frequency communications can take place over much greater distances than with inductively coupled antennas.
Claims30
An implantable medical device, comprising:
- a housing for containing electronic circuitry;
- an antenna extending from the housing;
- circuitry within the housing for transmitting or receiving a modulated radio-frequency carrier at a specified frequency to or from the antenna;
- and,
- wherein the electrical length of the antenna is approximately one-quarter wavelength or greater of the radio-frequency carrier at the specified frequency.
2 more elements
A method for transmitting and receiving radio-frequency signals in an implantable medical device, comprising:
- transmitting or receiving a modulated radio-frequency carrier at a specified frequency to or from an antenna extending from a housing for the device;
- and,
- transmitting the radio-frequency signal at a wavelength that is approximately four times or less the electrical length of the antenna.
An implantable medical device, comprising:
- a housing for containing electronic circuitry;
- an antenna dimensioned such that a significant portion of radio-frequency energy delivered to it at a specified frequency is emitted as far-field radiation;
- circuitry within the housing for transmitting or receiving a modulated radio-frequency carrier at the specified frequency to or from the antenna;
- and,
- a tuning circuit for matching the impedance of the antenna to a transmitter or receiver and altering the effective electrical length of the antenna.
2 more elements
An implantable cardiac rhythm management device, comprising:
- a housing for containing electronic circuitry;
- rhythm control circuitry electrically connected by one or more conductors within a therapy lead to an electrode adapted for disposition within the heart
- an antenna extending from the housing, wherein the antenna is formed the conductors of the therapy lead;
- wherein the conductors within a proximal portion of the therapy lead are arranged so as to form a non-radiating transmission line section of the lead that can be coiled without affecting a radiating antenna section of the lead;
- and,
- circuitry within the housing for transmitting or receiving a modulated radio-frequency carrier at a specified frequency to or from the antenna.
3 more elements
An implantable cardiac rhythm management device, comprising:
- a housing for containing electronic circuitry;
- rhythm control circuitry electrically connected by one or more conductors within a therapy lead to an electrode adapted for disposition within the heart
- an antenna extending from the housing, wherein the antenna is formed the conductors of the therapy lead;
- wherein the conductors within a distal portion of the lead adjacent to the electrode are arranged to form a filter section that blocks the transmission of radio-frequency energy to or from the electrode;
- and,
- circuitry within the housing for transmitting or receiving a modulated radio-frequency carrier at a specified frequency to or from the antenna.
3 more elements
An implantable cardiac rhythm management device, comprising:
- a housing for containing electronic circuitry;
- rhythm control circuitry electrically connected by one or more conductors within a therapy lead to an electrode adapted for disposition within the heart
- an antenna extending from the housing, wherein the antenna is formed the conductors of the therapy lead;
- wherein the conductors within a distal portion of the lead adjacent to the electrode are arranged to form a notch filter section that blocks the transmission of radio-frequency energy at a specified frequency band to or from the electrode;
- and,
- circuitry within the housing for transmitting or receiving a modulated radio-frequency carrier at a specified frequency to or from the antenna.
3 more elements
Dependencies are inferred from the claim text.