Liberty Mutual Insurance Company

Liberty Mutual

Carlo J DeLuca

L Donald Gilmore

A system and a method for obtaining improved quality electrical signals generated anatomically. Included in the system are primary terminals suitable for implantation so as to pick up an anatomically generated primary signal comprising both a desired component derived from a primary tissue source and a noise component derived from an auxiliary tissue source directly adjacent to the primary source. Also included are auxiliary terminals suitable for implantation directly adjacent to the primary terminals so as to pick up an anatomically generated auxiliary signal derived from the auxiliary signal source. Electrical leads connect the primary and auxiliary terminals and an output circuit having a processor for differentially combining the primary and auxiliary signals. By obtaining and then differentially combining both the primary and auxiliary signals there is obtained a high quality output signal corresponding to the desired component of the primary signal.

Method and apparatus for interfacing to anatomic signal sources

A device for anatomic implantation to provide electrical interface to nerves. Included in the device are a pair of electrical leads secured to a coupling formed from a piece of woven sheet material, and having ends connected to spaced apart input terminals disposed adjacent to an inner surface of the coupling. Connected to the opposite ends of the leads are output terminals for interfacing to electrical recording or measuring instruments. The input terminals receive desired nerve signals while other unwanted anatomic signals are rejected by an insulative case that covers the woven coupling.

Apparatus for interfacing to anatomic signal sources

A device and a method for anatomic implantation to provide electrical interface to nerves. Included in the device are a pair of electrical leads secured to a coupling formed from a piece of woven sheet material, and having ends connected to spaced apart input terminals disposed adjacent to an inner surface of the coupling. Connected to the opposite ends of the leads are output terminals for interfacing to electrical recording or measuring instruments. During implantation, a subject nerve is embraced by the inner surface of the sheet material which is shaped for juxtaposition the outer surface of the nerve at a minimum spacing therefrom of 0.3 millimeters. In the period following implantation the interstices of the sheet material coupling receive anatomic tissue growth establishing a structurally stable dimensional relationship between the nerve and both the input electrodes and the coupling. The fixed input electrode spacing between the electrode and the nerve improves the quality of the electrical signals received from the nerve while the 0.3 millimeter minimum spacing insures that the nerve will continue living for extended periods of time.

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Newton, MA, United States of America

Carlo J DeLuca