Electrical stimulation system and methods for treating...

A - Human Necessities – 61 – N

Patent

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A61N 1/34 (2006.01) A61F 2/68 (2006.01) A61F 2/50 (2006.01) A61F 2/70 (2006.01)

Patent

CA 2376169

This invention relates to a system and methods for relieving phantomlimb pain in amputees, and for providing an amputee with sensory feedback from a prosthetic limb (40). The system employs implantable multichannel, multi- chambered interface structures, namely, nerve cuffs (30). The implanted nerve cuffs have electrodes (14) which transmit electrical signals generated by a signal generator (12) to nerves (20), recruiting certain neurons to send sensory signals to the cerebral cortex, suggesting sensory sensations to the amputee. Such signals can arise directly from the signal generator, approximating the train of signals seen by the cortex in a normally innervated limb, or can originate from sensors (50a-c) in a prosthetic limb.

L'invention concerne un système et des procédés permettant de soulager la douleur illusionnelle des amputés et de conférer à un amputé une réaction sensorielle à travers une prothèse. Le système fait appel à des structures implantables multicanaux, multichambres d'interface, notamment des gaines de nerf. Ces derniers présentent des électrodes qui transmettent des signaux électriques générés par un générateur de signaux vers les nerfs. Certaines neurones sont recrutées pour envoyer des signaux sensoriels au cortex cérébral, ce qui donne à l'amputé des sensations. Ces signaux peuvent provenir directement du générateur de signaux, se rapprochant du train de signaux vu par le cortex dans un membre normalement innervé ou provenir de capteurs logés dans une prothèse.

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