Spinal needle system

Details Spinal needle system Spinal needle system

A - Human Necessities

61

M

A61M 5/178 (2006.01) A61B 17/34 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2472501

A spinal needle system that signals entry into the epidural space tip stabilizes the dura mater. The system includes a cannula (17) having at a distal tip (52) an annular surface surrounding a terminal port and at least one barb (50) projecting at an angle from the annular surface of the cannula for grasping and controlling the tissue. Each barb (50) is formed having a sharp edge configured to grasp the tissue as the tubular member is rotated about its longitudinal axis. One implementation of the system includes a plurality of unidirectional barbs (50) spaced around the annular surface of the cannula (17). The system includes an indicator mechanism that gives a visual and a tactile indication of when the cannula encounters and penetrates tissue. The system facilitates the appropriate placement of an epidural or subdural catheter or patch of any kind.

Cette invention concerne un système à aiguille pour ponction lombaire qui signale la pénétration dans l'espace péridural et stabilise la dure-mère. Le système comprend une canule (17) dont l'extrémité distale (52) présente une surface annulaire autour d'un orifice terminal et au moins un ardillon (50) qui fait dépasse de la surface annulaire de la canule et permet de saisir et de manipuler un tissu. Chaque ardillon (50) présente un bord acéré conçu pour saisir le tissu lorsque l'on fait tourner l'élément tubulaire sur son axe longitudinal. Dans un mode de réalisation, le système comprend une pluralité d'ardillons (50) unidirectionnels disposés autour de la surface annulaire de la canule (17). Le système est assorti d'un mécanisme indicateur qui indique de façon visuelle et tactile le moment ou la canule rencontre un tissu et pénètre dans ledit tissu. Ce système facilite la pose d'un cathéter épidural ou subdural ou bien d'une quelconque pièce.

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