Multi-purpose phacoemulsification needle

A - Human Necessities – 61 – F

Patent

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Details

A61F 9/007 (2006.01)

Patent

CA 2651112

In one aspect of the invention, a multi-purpose phacoemulsification needle comprises a needle body disposed about a ceiiterline and has a lumen disposed therein. The lumen has a first cross-sectional area that is normal to the centerline. The needle further comprises a distal tip comprising an arcuate surface and a face with a port therein. The port has a second cross-sectional area in a plane generally parallel to the face and is in fluid communication with an internal cavity that has a third cross-sectional area normal to the centerline, the internal cavity being in fluid communication with the lumen. The needle is configured such that the third cross-sectional area is greater than either the first cross-sectional area or the second cross-sectional area. In another aspect of the invention, the needle comprises a plurality of fins projecting inwardly from the lumen.

Selon un aspect, la présente invention concerne une aiguille de phaco-émulsification multifonctions comportant un corps d'aiguille disposé autour d'un axe longitudinal et renfermant une lumière. La lumière présente une première zone de section transversale qui est normale à l'axe longitudinal. L'aiguille comporte également une extrémité distale comprenant une surface en forme d'arc et une face renfermant un orifice. L'orifice présente une seconde zone de section transversale dans un plan globalement parallèle à la face et se trouve en communication fluidique avec une cavité interne qui présente une troisième zone de section transversale normale à l'axe longitudinal, la cavité interne étant en communication fluidique avec la lumière. L'aiguille est configurée de sorte que la troisième zone de section transversale est supérieure soit à la première zone de section transversale soit à la seconde zone de section transversale. Selon un autre aspect de l'invention, l'aiguille comporte une pluralité de nervures faisant saillie vers l'intérieur de la lumière.

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