Pumping chamber for a liquefracture handpiece

Details Pumping chamber for a liquefracture handpiece Pumping chamber for a liquefracture handpiece

A - Human Necessities

61

F

A61F 9/007 (2006.01) A61B 17/32 (2006.01) A61B 18/04 (2006.01)

Patent

CA 2353941

A surgical handpiece having at least two lumens or tubes mounted to a body. At least one tube is used for aspiration and at least one other tube is used to inject heated surgical fluid for liquefying a cataractous lens. A portion of the second tube is enlarged to form a pumping chamber. The pumping chamber works by boiling a small volume of the surgical fluid. As the fluid boils, it expands rapidly, thereby propelling the liquid downstream of the pumping chamber out of the second tube. The pumping chamber may use a pair of electrodes.

L'invention concerne un instrument chirurgical manuel comportant au moins deux lumières ou tubes montés sur un corps. Au moins un des tubes sert pour l'aspiration et au moins un autre tube sert à l'injection d'un fluide chirurgical chauffé utilisé pour liquéfier un cristallin cataracté. Une partie du second tube est élargie en vue de la formation d'une chambre de pompage permettant d'amener à ébullition un petit volume de fluide chirurgical. Lorsque le fluide bout, il se dilate rapidement, poussant le liquide en aval de la chambre de pompage à l'extérieur du second tube. La chambre de pompage peut utiliser une paire d'électrodes.

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