Magnetic nerve stimulator for exciting peripheral nerves

A - Human Necessities – 61 – N

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A61N 2/02 (2006.01)

Patent

CA 2206054

A magnetic nerve stimulator system is comprised of a core of highly saturable material with a coil winding. A thyrister capacitive discharge circuit pulses the device. A rapidly changing magnetic field is guided by the core, preferably vanadium permendur. For task specific excitation of various nerve groups, specially constructed cores allow for excitation of nerves at deeper levels with higher efficiency than is possible with an air core stimulator. Among the applications possible with this invention are treatment of incontinence, rehabilitation of large muscle groups in the leg and arm, and excitation of abdominal wall muscle groups to aid in weight loss and metabolic rate increase. A C-shape is employed for focussing the stimulation as desired.

La présente invention concerne un système stimulateur nerveux magnétique constitué d'un noyau (2) de matière hautement saturable et d'un enroulement de bobine (4). Un circuit à décharges capacitives comprenant un thyristor fournit des impulsions au dispositif. Un champ magnétique à variations rapides est commandé par le noyau (2), de préférence lui-même constitué de permendur (alliage contenant du vanadium). En vue de l'excitation, spécifique à une tâche donnée, de différents groupes de nerfs, des noyaux de fabrication spéciale permettent l'excitation des nerfs à des niveaux plus profonds et de manière plus efficace que cela n'est possible avec un stimulateur avec noyau à air. Les applications possibles de la présente invention comprennent le traitement de l'incontinence, la réadaptation de grands groupes de muscles de la jambe et du bras, et l'excitation de groupes de muscles de la ceinture abdominale pour favoriser une perte de poids et une augmentation du rythme métabolique. Un noyau en forme de "C" sert à concentrer la stimulation suivant le cas.

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