Pumping chamber for a liquefaction handpiece having a countersin

Details Pumping chamber for a liquefaction handpiece having a countersin Pumping chamber for a liquefaction handpiece having a countersin

1998-08-06

1999-11-23

McDermott, Corrine

Surgery

Means for introducing or removing material from body for...

Material introduced into and removed from body through...

604114, 604291, 606107, A61M 100, A61F 712, A61F 700, A61F 900

Patent

active

059892129

ABSTRACT:
A surgical handpiece having at least two lumens mounted to a body. At least one lumen is used for aspiration and at least one other lumen is used to inject heated surgical fluid for liquefying a cataractous lens. A portion of the second lumen 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 lumen. The pumping chamber may use a pair of electrodes, at least one of the electrodes containing a countersink.

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