News Column

Patent Application Titled "Medical Device Communication System and Method" Published Online

August 21, 2014

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 Wang, Yu (Plymouth, CN); Rosar, George C. (Minneapolis, MN), filed on January 29, 2013, was made available online on August 7, 2014.

The assignee for this patent application is Medtronic, Inc.

Reporters obtained the following quote from the background information supplied by the inventors: "Medical device systems may use wireless communication for transmitting data from one device to another. For example, an implantable or external monitoring or therapy delivery device may receive programming commands or operational parameters from a programmer. The monitoring or therapy delivery device may transmit data to the programmer or a computer to enable a clinical or technical expert to review data acquired by the device.

"As implantable medical devices become smaller in size, the reduction in power requirements and space required for telemetry circuitry is also desired. External devices, for example wearable devices, may not have the same size limitations as implantable devices, but power conservation may still be a goal to allow a patient to be ambulatory without frequent battery changes or charges. Accordingly, a need remains for communication systems for use with medical device systems that reduce the power requirements for communication between a patient monitoring or therapy delivery device and a programmer or other communication device."

In addition to obtaining background information on this patent application, VerticalNews editors also obtained the inventors' summary information for this patent application: "A communication system for telemetric communication between medical devices includes a transmitter having a local oscillator stabilized by a resonator, such as a surface acoustic wave (SAW) resonator. A data source generates transmission data that is converted to a control signal. The control signal is received by a control device in an open loop, which controls direct modulation of the local oscillator operating frequency. In various embodiments, the control device includes a digitally controlled device, e.g. a digitally controlled oscillator providing an intermediate frequency (IF). A mixer receives the IF signal and the local oscillator signal and generates a direct modulated radio frequency (RF) transmission signal. In other embodiments, the control device includes a digitally controlled capacitor array included in an LC tank circuit coupled to the local oscillator for controlling the oscillation frequency of the local oscillator for open loop, direct modulation of the local oscillator signal to produce a RF transmission signal. Open-loop modulation of the resonator-stabilized local oscillator is made possible in either frequency shift keyed (FSK) or phase shift keyed (PSK) modulation. These and other embodiments of a medical device communication system are described herein.

"This summary is intended to provide an overview of the subject matter described in this disclosure. It is not intended to provide an exclusive or exhaustive explanation of the techniques as described in detail within the accompanying drawings and description below. Further details of one or more examples are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the statements provided below.


"FIG. 1 is a schematic diagram illustrating a communication system according to one embodiment.

"FIG. 2 is a block diagram illustrating some of the components of an implantable medical device (IMD) and an external unit that make up the communication system shown in FIG. 1.

"FIG. 3 is a block diagram of a power efficient medical device transmitter according to one embodiment.

"FIG. 4 is a block diagram of a medical device telemetry system transmitter according to an alternative embodiment.

"FIG. 5 is a flow chart of a method for telemetry communication for use in a medical device system."

For more information, see this patent application: Wang, Yu; Rosar, George C. Medical Device Communication System and Method. Filed January 29, 2013 and posted August 7, 2014. Patent URL:

Keywords for this news article include: Therapy, Medtronic Inc..

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Source: Politics & Government Week

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