Magnetic nerve stimulator for exciting peripheral nerves

Details Magnetic nerve stimulator for exciting peripheral nerves Magnetic nerve stimulator for exciting peripheral nerves

A - Human Necessities

61

N

A61N 1/00 (2006.01) A61N 2/02 (2006.01)

Patent

CA 2315861

A magnetic nerve stimulator system is comprised of a core (2) constructed from a material having a high field saturation with a coil winding (4). A thyrister capacitive discharge circuit pulses the device. A rapidly changing magnetic field is guided by the core (2), 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 aircore stimulators. Among the applications possible with this invention are treatment of incontinence, rehabilitation of large muscle groups in the leg, the arm, and excitation of abdominal wall muscles groups to aid in weight loss, and metabolic rate increase. A C shape is employed for focussing the stimulation as desired.

L'invention concerne un système de neurostimulation magnétique constitué d'un noyau (2) formé d'une matière à forte saturation de champ 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 constitué de permendur (alliage contenant du vanadium). En vue de l'excitation spécifique à une tâche donnée de différents groupes nerveux, des noyaux spécialement conçus permettent l'excitation des nerfs à des niveaux plus profonds et de manière plus efficace par rapport à un stimulateur avec noyau à air. Parmi les applications possibles, on recense le traitement de l'incontinence, la rééducation 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 selon les besoins.

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