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Patent Application Titled "Far Field Telemetry Operations between an External Device and an Implantable Medical Device during Recharge of the...

August 28, 2014



Patent Application Titled "Far Field Telemetry Operations between an External Device and an Implantable Medical Device during Recharge of the Implantable Medical Device via a Proximity Coupling" Published Online

By a News Reporter-Staff News Editor at Politics & Government Week -- According to news reporting originating from Washington, D.C., by VerticalNews journalists, a patent application by the inventors Olson, David P. (Minnestrista, MN); Phillips, William C. (Brooklyn Park, MN); Sipple, Garrett R. (Circle Pines, MN); Wang, Yu (Plymouth, MN), filed on April 5, 2014, was made available online on August 14, 2014.

The assignee for this patent application is Medtronic, Inc.

Reporters obtained the following quote from the background information supplied by the inventors: "Implantable medical devices including those that are positioned on the exterior of a body of a patient as well as those that are positioned subcutaneously or deeper typically utilize an on-board battery that allows the patient to be untethered to a power source. The patient maintains mobility while the implantable medical device performs a particular medical task by operating on power from the battery. For instance, the implantable medical device may provide stimulation therapy for neurological or cardiac conditions, may provide drug delivery for various conditions such as pain management, and/or may provide physiological monitoring.

"While the on-board battery may power the medical device for a relatively long period of time, the on-board battery will eventually be depleted. Prior to rechargeable medical systems, the implantable medical device would be replaced once the battery became depleted. With rechargeable medical systems, an external device provides recharge energy over a proximity coupling, which is typically inductive, to the implantable medical device. This recharge energy restores the on-board battery to a satisfactory level for continued operation of the medical device.

"During a recharge session, the external device in control of the recharge energy and the implantable medical device to be recharged exchange telemetry communications related to the recharge process. Recharge information such as battery status, coupling efficiency and the like may be transferred in this manner so that the external device can properly control delivery of the recharge energy as well as instruct a user. Conventionally, the two devices exchange telemetry communications over a proximity coupling. However, this proximity coupling is also being used to transfer the recharge energy, and in some cases recharging may stop while the telemetry communications are conducted over the proximity coupling. This increases the amount of time needed to complete the recharge session."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventors' summary information for this patent application: "Embodiments address issues such as these and others by providing far field telemetry operations between the external device and the implantable medical device while power continues to be transferred to the implantable medical device to recharge the battery. The far field telemetry operations include exchanging by far field telemetry communications recharge information collected by the implantable medical device that is used by the external device. The far field telemetry operations may include suspending far field telemetry communications for periods during the recharge session to reduce the amount of energy being expended by the implantable medical device during the recharge session. The far field telemetry operations may include sending programming instructions to the implantable medical device such as where the external device receives a programming request from a user during the recharge session.

"Embodiments provide a method of recharging an implantable medical device. The method involves establishing a far field telemetry communication session with the implantable medical device and transferring power over a proximity coupling to the implantable medical device during the far field telemetry communication session. The method further involves receiving recharge information from the implantable medical device via the far field telemetry communication session while transferring power to the implantable medical device, and after receiving the recharge information, suspending the far field telemetry communication session for a period of time while transferring power to the implantable medical device.

"Embodiments provide a medical system that includes an external device having a far field telemetry communication circuit and a recharge circuit. The external device transfers power through a recharge head of the recharge circuit while receiving recharge information through a far field telemetry communication session via the far field telemetry communication circuit. The external device suspends the far field telemetry communication session for a first period of time after receiving the recharge information by sending an instruction to close the far field telemetry communication session to the implantable medical device while continuing to transfer power. The medical system also includes an implantable medical device having a far field telemetry communication circuit and a recharge circuit. The implantable medical device receives transferred power via a proximity coupling of the recharge circuit to the recharge head of the external device while sending recharge information through the far field telemetry communication session via the far field telemetry communication circuit. The implantable medical device closes the far field telemetry communication session upon receiving the instruction and listens for an instruction to open the far field telemetry communication session after each occurrence of a second period that is no greater than the first period while continuing to receive transferred power.

"Embodiments provide an implantable medical device that includes a medical circuit that performs a medical task, a battery that provides power to the medical circuit, a recharge circuit that provides power to the battery, a far field telemetry communication circuit, and a processor. The processor controls the recharge circuit and the far field telemetry communication circuit, where the processor directs the recharge circuit to receive transferred power from a proximity coupling to a recharge head of an external device. The processor directs the far field telemetry communication circuit to send recharge information via a far field telemetry communication session with the external device while the recharge circuit receives transferred power. The processor further directs the far field telemetry communication circuit to power down in response to receiving a command to close the communication session with the external device while the recharge circuit receives transferred power. The processor periodically directs the far field telemetry communication circuit to power up and listen for a command to open the communication session while the recharge circuit receives transferred power.

"Embodiments provide a method of recharging an implantable medical device. The method involves establishing a far field telemetry communication session with the implantable medical device and transferring power over a proximity coupling to the implantable medical device during the far field telemetry communication session. The method further involves receiving recharge information from the implantable medical device via the far field telemetry communication session while transferring power to the implantable medical device, and while transferring power, sending programming instructions to the implantable medical device via the far field telemetry communication session.

DESCRIPTION OF THE DRAWINGS

"FIG. 1 shows an example of a medical system according to various embodiments.

"FIG. 2 shows an example of components of an external device of the medical system.

"FIG. 3 shows an example of components of an implantable medical device of the medical system.

"FIGS. 4A-4C show examples of operations of the external device and the implantable medical device of a medical system."

For more information, see this patent application: Olson, David P.; Phillips, William C.; Sipple, Garrett R.; Wang, Yu. Far Field Telemetry Operations between an External Device and an Implantable Medical Device during Recharge of the Implantable Medical Device via a Proximity Coupling. Filed April 5, 2014 and posted August 14, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1860&p=38&f=G&l=50&d=PG01&S1=20140807.PD.&OS=PD/20140807&RS=PD/20140807

Keywords for this news article include: Medtronic Inc.

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Source: Politics & Government Week


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