Method for monitoring impedance to control power and apparatus utilizing same
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United States of America Patent
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Feb 15, 2005
Grant Date -
Jan 22, 2004
app pub date -
Jul 22, 2002
filing date -
Jul 22, 2002
priority date (Note) -
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Abstract
A method for monitoring the impedance in a circuit coupling a radio frequency electrode to a radio frequency generator to control the power supplied by the generator to the electrode during a treatment procedure. In the method, the impedance in the circuit is monitored over a length of time. An expected impedance at the end of the treatment procedure is calculated from the monitored impedance and compared to a predetermined maximum impedance. The power supplied to the circuit is reduced if the expected impedance is greater than the predetermined maximum impedance. A computer-readable memory and apparatus utilizing the method are provided.
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