Browse Prior Art Database

Publication Date: 2005-Aug-29
Document File: 4 page(s) / 56K

Publishing Venue

The Prior Art Database


This paper describes a wireless device supporting dual-mode interfacing to implantable medical devices. Patients that are IMD recipients can be provided with a single device, whether the IMD uses inductive, radio frequency, or dual-mode communications. The single device approach could potentially cover an entire IMD product line and could also allow streamlined customer support and maintenance for just a single device, rather than for separate devices for inductive- and radio frequency-based IMDs. In addition, in a further embodiment, enhanced dual-mode wireless devices could further include programming functionality for IMDs for use by clinicians, which could preferably be provided through the inductive interface.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 47% of the total text.


FIGURE 1 is a functional block diagram 100 showing, by way of example, the internal components of a dual-mode wireless device 101 supporting both inductive and radio frequency (RF) communication with an implantable medical device (IMD).  The wireless device 101, such as a dedicated repeater, personal communicator, or similar device, communicatively interfaces to the IMD, such as a pacemaker, implantable cardiac defibrillator (ICD) or similar device, to exchange data over a bidirectional wireless connection.  The wireless device 101 can also communicatively interface to one or more external sensors (not shown) .  Unlike conventional programmer or programmer/recorder devices, the wireless device 101 can be used in an at-home environment by a patient, or in hospital or clinic environments by clinicians, such as physicians, nurses, and qualified professional staff.

The wireless device 101 includes telemetry circuitry that provides a multimodal wireless communication interface between the IMD and the wireless device 101.  For near field data exchange, the wireless device 101 communicates with the IMD through inductive telemetry signals exchanged through a wand placed on the patient’s body over the location of the IMD.  For far field data exchange, the wireless device 101 communicates with the IMD through radio frequency (RF) signals.  Other types of data interfaces are possible.  Stored qualitative physiological measures, parametric data, and environmental parameters can be received from and programming parameters can be sent to the IMD via the communication interface.  Other types of data exchange are possible.

The IMD is surgically implanted into the chest or abdomen of a patient to provide in situ therapy, such as pacing, cardiac resynchronization, defibrillation, neural stimulation and drug delivery, and physiological data monitoring.  Implantable therapeutic and monitoring devices, in addition to, or in lieu of cardiac monitoring and therapy delivery IMDs are possible, including IMDs for providing neural stimulation, drug delivery, and physiological monitoring and collection.

By way of example, the wireless device 101 includes a processor 102, memory 103, power supply 104, communications module 105, and authentication module 106.  In a further embodiment, the wireless device 101 includes one or more optional integrated sensors 114 and alarm 116.  Each of the components is powered by the power supply 104, such as an external power source, such as 110 VAC electrical current or a rechargeable or replaceable battery.  The internal components are provided in a housing with provision for an antenna 117, wand interface 118, and optional physical interface 119.  The antenna 117 is used for RF telemetry and the wand interface 118 is used to physically connect a telemetry wand for use in inductive telemetry.

The processor 102 enables...