Methods and systems for selective control of bladder function

A - Human Necessities – 61 – N

Patent

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A61N 1/18 (2006.01) A61N 1/10 (2006.01) A61N 1/20 (2006.01) A61N 1/32 (2006.01) A61N 1/34 (2006.01) A61N 1/40 (2006.01)

Patent

CA 2505587

A method and system for selective inhibition of somatic nerve fibers in a mixed nerve containing both somatic and autonomic nerve fibers where the method finds use in treatment of chronic pain, spastic muscles and for sensory and motor control of a bladder. The methods and systems utilize alternate phase rectangular electrical pulses. An electrical pulse generator is coupled to a nerve. An alternate phase high frequency, low amplitude pulse is first applied to selectively inhibit somatic nerves when present in a mixed nerve. An alternate phase low frequency, high amplitude phase pulse subsequently supplied to stimulate the autonomic nerve fibers and in the case of the sacral root will permit a controlled voiding of the bladder and bowel.

La présente invention concerne un procédé et un système qui permettent d'inhiber sélectivement les fibres nerveuses somatiques d'un nerf mixte contenant des fibres nerveuses somatiques et autonomes, et qui sont utiles dans le traitement de la douleur chronique, des muscles spastiques et dans la commande sensorielle et motrice de la vessie. Les procédés et systèmes de l'invention font appel à des impulsions électriques rectangulaires de phase alternée. Un générateur d'impulsions électriques est couplé à un nerf.On applique d'abord une impulsion de faible amplitude et haute fréquence de phase alternée afin d'inhiber sélectivement les nerfs somatiques lorsqu'ils sont présents dans un nerf mixte. On applique ensuite une impulsion de forte amplitude et basse fréquence de phase alternée afin de stimuler les fibres nerveuses autonomes et, dans le cas de la racine sacrée, afin de permettre une évacuation contrôlée de la vessie et des intestins.

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