Catheter with cryogenic and electrical heating ablation
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United States of America Patent
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May 31, 2011
Grant Date -
May 15, 2008
app pub date -
Jan 9, 2008
filing date -
Dec 9, 1999
priority date (Note) -
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Abstract
A catheter includes a cryoablation tip with an electrically-driven ablation assembly for heating tissue. The cryoablation tip may be implemented with a cooling chamber through which a controllably injected coolant circulates to lower the tip temperature, and having an RF electrode at its distal end. The RF electrode may be operated to warm cryogenically-cooled tissue, or the coolant may be controlled to conductively cool the tissue in coordination with an RF treatment regimen, allowing greater versatility of operation and enhancing the lesion size, speed or placement of multi-lesion treatment or single lesion re-treatment cycles.
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