Apparatus and method for determining the extent of ablation
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United States of America Patent
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Mar 21, 2000
Issued Date -
N/A
app pub date -
Oct 29, 1998
filing date -
Jun 9, 1995
priority date (Note) -
Expired
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Abstract
A catheter for use in an electrophysiological procedure to ablate a site includes a first electrode having a first work function and energized by a source of RF energy. A second electrode having a second work function is disposed adjacent tissue. The difference in work functions of the first and second electrodes, operating in the presence of an electrolyte represented by intermediate tissue, produces an exchange of electrical charges through chemical reaction to create a galvanic cell. The galvanic cell serves as a current source to provide a unique electrode signal used to regulate the RF energy applied to the first electrode.
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