Method and apparatus for myocardial revascularization and/or...

A - Human Necessities – 61 – B

Patent

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A61B 17/32 (2006.01) A61B 10/00 (2006.01) A61B 17/00 (2006.01) A61B 17/30 (2006.01)

Patent

CA 2244596

A semi-automatic cardiac tissue removal device for obtaining biopsy samples and/or creating revascularization pathways in the myocardium of the heart, mechanically cuts the pathways using a handpiece with a cutting tip assembly having a hollow needle with an angled, sharpened edge rotatable mounted around a separately advancable stylet. The stylet defines a piercer to spread the myocardium prior to insertion of the needle and to allow creation of a pathway only within the myocardium. The stylet further defines a plug at the cutting edge of the needle to finish the cutting cleanly and to plug the hollow needle thereby forming a closed chamber for excised tissue. A single button on the left or right handed handpiece actuates movement of the stylet into the myocardium, movement of the needle into the path produced by the piercer, and rotation of the needle to cut tissue.

Dispositif semi-automatique d'ablation de tissu cardiaque pour obtenir des pièces de biopsie et/ou créer des voies de revascularisation dans le myocarde par section mécanique à l'aide d'une pièce à main munie à son extrémité d'une aiguille creuse ayant une arête tranchante angulaire rotative, montée sur un stylet qui peut être avancé séparément. Le stylet comprend un perceur qui étire le myocarde avant l'insertion de l'aiguille et permet de créer une voie seulement à l'intérieur du myocarde. Le stylet contient aussi un obturateur situé sur le bord tranchant de l'aiguille pour terminer la section proprement et pour obturer l'aiguille creuse, formant ainsi un compartiment qui emprisonne le tissu excisé. Un bouton sur la pièce à main pour main droite ou gauche fait bouger le stylet dans le myocarde, fait avancer l'aiguille dans la voie pratiquée par le perceur et fait tourner l'aiguille pour sectionner le tissu.

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