Dilator

A - Human Necessities – 61 – M

Patent

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Details

A61M 29/00 (2006.01) A61B 17/02 (2006.01) A61B 17/34 (2006.01)

Patent

CA 2712011

A dilator that facilitates implantation of an interspinous spacer is provided. The dilator includes a proximal portion and a tapered distal portion interconnected by an elongated body portion. The tapered distal portion is ideally suited for splitting ligamentous tissue for creating a posterior midline pathway through the supraspinous ligament as well as for distracting the adjacent spinous processes. Two oppositely located and longitudinally extending channels or grooves are formed in the outer surface of the dilator for stabilizing the dilator with respect to the spinous processes. An accompanying cannula together with the dilator form a system for the distraction of the adjacent spinous processes, stabilization of the spinous processes with respect to the system and creation of a working channel for the implantation of an interspinous spacer.

L'invention porte sur un dilatateur qui facilite une implantation d'un espaceur interépineux. Le dilatateur comprend une partie proximale et une partie distale effilée reliées entre elles par une partie corps allongée. La partie distale effilée est idéalement adaptée pour la séparation d'un tissu ligamentaire afin de créer un trajet de ligne médiane postérieur à travers le ligament sus-épineux ainsi que pour la distraction des apophyses épineuses adjacentes. Deux canaux ou rainures situés de manière opposée et s'étendant longitudinalement sont formés dans la surface externe du dilatateur pour stabiliser le dilatateur par rapport aux apophyses épineuses. Une canule accompagnante conjointement avec le dilatateur forment un système pour la distraction des apophyses épineuses adjacentes, la stabilisation des apophyses épineuses par rapport au système et la création d'un canal de travail pour l'implantation d'un espaceur interépineux.

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