Cooled ablation catheter with reciprocating flow
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United States of America Patent
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May 14, 2013
Grant Date -
Aug 18, 2011
app pub date -
Apr 25, 2011
filing date -
Dec 28, 2006
priority date (Note) -
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Abstract
The invention relates to an ablation catheter which controls the temperature and reduces the coagulation of biological fluids on an electrode of a catheter, prevents the impedance rise of tissue in contact with the electrode, and maximizes the potential energy transfer to the tissue, thereby allowing an increase in the lesion size produced by the ablation. The electrode includes passages positioned to allow blood and other biological fluids to flow into and out of an inner cavity of the electrode. This fluid flow produced the desired cooling effect and is accomplished, for example, by a reciprocating plunger or piston, or by a balloon that is alternately inflated and deflated.
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