Method and apparatus for mechanical transmyocardial...

Details Method and apparatus for mechanical transmyocardial... Method and apparatus for mechanical transmyocardial...

A - Human Necessities

61

B

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

Patent

CA 2212657

An apparatus for creating revascularization channels in tissue, such as the myocardium of the heart, mechanically cuts the channels using a hand piece with easily removable cutting tip assemblies having angled, sharpened edges to allow rapid tip replacement. The cutting tip assembly has an inner needle within an outer hollow needle with each needle attached to the hand piece for independent rotation and axial movement. The inner needle may be hollow, or formed with a pointed tip, and may rotate counter to the outer needle to enhance gripping and storage of the tissue excised by the outer needle. The hand piece may attach a cylindrical magazine of cutting tip assemblies or one cutting tip assembly. The cutting tip assembly may be heated to provide thermal damage to the heart muscle during the creation of the channel, providing some of the advantages of the laser method of TMR.

Les blocs présentent des bords tranchants à angle pour permettre de remplacer les pointes rapidement. Le bloc de coupe comporte une aiguille interne placée dans une aiguille externe creuse; chaque aiguille est fixée à la pièce à main pour lui permettre de pivoter et de se déplacer indépendamment l'une de l'autre. L'aiguille interne peut être creuse, ou présenter une pointe, et peut pivoter dans le sens contraire de l'aiguille externe pour améliorer la préhension et l'entreposage du tissu excisé par l'aiguille externe. La pièce à main peut inclure un magasin cylindrique de blocs de coupe ou un seul bloc de coupe. Le bloc peut être chauffé pour entraîner des lésions du muscle du coeur causées par la chaleur, offrant ainsi certains des avantages de la méthode au laser pour la RTM.

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