Multi-electrode neurological stimulation apparatus

Details Multi-electrode neurological stimulation apparatus Multi-electrode neurological stimulation apparatus

1990-04-19

1991-08-13

Jaworski, Francis

Surgery

Truss

Pad

128419C, 128784, A61N 100

Patent

active

050387812

ABSTRACT:
An implantable system for Functional Electro-Stimulation (FES) is disclosed which includes an environmentally sealed implant case and a nerve cuff for attaching to the nerve. A plurality of leads connect the nerve cuffs to the case. The implant case provides redundant seals for entrance of the leads in a double wall/double environmental seal to provide long term sealing reliability for the case. Inside the case, the wires in each lead attach to connectors, which establish contact with an enclosed master circuitry case. The connectors allow the leads to be individually removed and replaced, thereby providing a maintainable system.
At the other end of the leads is attached the nerve cuff. Each nerve cuff has a hollow, gapped cylindrical shape, and includes electrodes on its inner surface. The cuff is deformable to allow placement around the nerve, holding the electrodes in electrical contact therewith.
In other embodiments of the invention, the nerve cuff includes a micro circuit which is capable of demultiplexing stimulation signals from a single pair of wires in the lead to drive multiple electrodes. These embodiments reduce the number of wires needed in each lead to facilitate the stimulation of a large number of nerves with a single implant.

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Proceedings of the 1st Vienna International Workshop of Functional Electrostimulation Basics, Technology and Application, Vienna, Austria, Oct. 19-22, 1983.
Section 5.3, "Epineural Electrode Implantation for Electrically Induced Mobilization of Paraplegics" by J. Holle et al.
Section 5.4, "Functional Electrostimulation Makes Paraplegic Patients Walk Again" by H. Stoehr et al.
Section 5.7, "Intrafascilular Nerve Stimulation to Restore Locomotion in Paraplegics" by P. Rabischong et al.
Section 6.5, "Further Experiences with Elektrophrenic Respiration" by E. Moritz et al.
Section 8.1, "Multipolar Non Invasive Electrode for Partial, Direct Cyclic Skeletal Muscle Nerve Stimulation" by F. Ugolini.
Section 14.1, "The Role of Biomaterials Research for Electrical Stimulation" by H. Plenk, Jr.
Section 14.5, "Technology and Transcutaneous Supply of Implantable Electronic Stimulator Circuitry" by I. J. Hochmair-Desoyer et al.

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