Rechargeable spinal cord stimulator system

A - Human Necessities – 61 – N

Patent

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Details

A61N 1/34 (2006.01) A61N 1/378 (2006.01)

Patent

CA 2416154

A spinal cord stimulation (SCS) system includes implantable components (10), external components (20) and surgical tools and aids (30). The implantable components includes an implantable pulse generator (100), or IPG, having a rechargeable battery. The IPG (100) is connected to an electrode array (110) having at least sixteen electrodes. An extension lead (120) may be used, as required, to connect the IPG to the electrode array. The rechargeable battery is recharged using non-invasive means. The external components (20) include a hand held programmer (202), a clinician programmer (204), and an external trial stimulator (140). The trial stimulator may connect directly with the implantable electrode array (110) via a percutaneous extension lead (132), communications with the IPG are established via an RF link established between the pulse generator and an external hand held programmer (202), or HHP.Similar cirucitry may control the applied stimulation pulses as a burst of pulses ends in order to gradually ramp down the amplitude. Other processing circuitry allows electrode impedance measurements to be regularly made.

Cette invention concerne un système de stimulation de moelle épinière comprenant des composants implantables (10), des composants extérieurs (20) ainsi que des instruments et des auxiliaires chirurgicaux (30). Le composants implantables comprennent un générateur d'impulsions implantable (IPG) (100) avec pile d'accumulateur rechargeable. Le générateur d'impulsions (100) est connecté à un ensemble d'électrodes (110) comptant au moins seize électrodes. On peut au besoin utiliser une rallonge de câble (120) pour raccorder le générateur d'impulsions au jeue d'électrodes. La batterie d'accumulateur rechargeable se recharge de manière non infractive. Les composants extérieurs (20) comportent un programmateur portable (202), un programmateur médical (204), et un stimulateur d'essai extérieur (140). Ce stimulateur d'essai peut se brancher directement sur le jeu d'électrodes (110) via une rallonge de câble percutanée (132). Les communications avec le générateur d'impulsions se font via une liaison RF et un programmateur portable extérieur (202). Un circuit analogue permet de régler les impulsions de stimulation appliquées lorsqu'une salve d'impulsion se termine afin de réduire l'amplitude. D'autres circuits de traitement permettent de mesurer l'impédance des électrodes à intervalles réguliers.

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