Method and apparatus for monitoring cryosurgical operations
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Oct 29, 1999
filing date -
Oct 29, 1999
priority date (Note) -
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Abstract
A method and system for monitoring the progress of an ice ball produced by a cryoprobe during a surgical procedure measures the complex impedance of the ice ball. An electrical model of the zones in the ice ball is employed to calculate the size of the zones using the complex impedance measurements. The ice ball zones are displayed to assist the surgeon in controlling the cryoprocedure.
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