Method and apparatus for treating intervertebral discs

A - Human Necessities – 61 – B

Patent

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A61B 17/56 (2006.01)

Patent

CA 2269282

Percutaneous methods and systems for treating an intervertebral disc are disclosed. An intervertebral disc treatment apparatus includes an introducer (12) and a catheter (14) having a distal end (28), a proximal end, a longitudinal axis, and an intradiscal section (16) at the distal end on which there is at least one functional element (29). The treatment proceeds by applying a force longitudinally to the proximal end of the catheter which is sufficient to advance the intradiscal section through the nucleus pulposus and around an inner wall of an annulus fibrosus, but which force is insufficient to puncture the annulus fibrosus. The functional element is positionned at a selected location of the intervertebral disc by advancing or retracting the catheter and optionally twisting the proximal end of the catheter. Then, the functional unit treats the intervertebral disc. Optionally, there is an additional step of aspirating and/or adding a substance to the intervertebral disc.

La présente invention concerne des procédés et des systèmes percutanés de traitement d'un disque intervertébral. Un appareil de traitement de disque intervertébral comporte un introducteur (12) et un cathéter (14) possédant une extrémité distale (28), une extrémité proximale, un axe longitudinal et une section intradiscale (16) située à l'extrémité distale, sur laquelle un élément fonctionnel (29), au moins, est placé. Le traitement procède par application d'une force longitudinale sur l'extrémité proximale du cathéter, suffisante pour déplacer la section intradiscale dans le nucleus pulposus et autour d'une paroi interne d'un annulus fibrosus, mais insuffisante pour perforer l'annulus fibrosus. L'élément fonctionnel est positionné sur un site implantation sélectionné du disque intervertébral, en avançant ou en rétractant le cathéter et en tordant, éventuellement, l'extrémité proximale du cathéter. L'unité fonctionnelle traite ensuite le disque intervertébral. Il peut, éventuellement, y avoir une étape supplémentaire d'aspiration et/ou d'ajonction d'une substance au disque intervertébral.

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