초록 ▼

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 chambe

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.

대표청구항 ▼

[ We claim:] [1.] A liquefaction handpiece, comprising:a) a body having an irrigation lumen; andb) a pumping chamber attached to the irrigation lumen, the pumping chamber having a pair of electrodes that allow electrical current to flow across the electrodes when a surgical fluid is contained within

[ We claim:] [1.] A liquefaction handpiece, comprising:a) a body having an irrigation lumen; andb) a pumping chamber attached to the irrigation lumen, the pumping chamber having a pair of electrodes that allow electrical current to flow across the electrodes when a surgical fluid is contained within the pumping chamber, at least one of the electrodes containing a countersink.