Pumping chamber for a liquefaction handpiece
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United States of America Patent
Stats
-
Jun 10, 2003
Grant Date -
Apr 18, 2002
app pub date -
Dec 14, 2001
filing date -
Mar 14, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A surgical handpiece having a tube used to inject heated surgical fluid for liquefying a cataractous lens. A portion of the 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. To control the expulsion of the fluid, valves are placed on either side of the boiling chamber.
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