METHOD AND SYSTEM FOR CONTROLLING RADIO FREQUENCY OUTPUT ACCORDING TO CHANGE IN IMPEDANCE OF BIOLOGICAL CELLS
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United States of America Patent
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Issued Date -
Mar 24, 2011
app pub date -
Mar 24, 2010
filing date -
Sep 23, 2009
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Abandoned
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Abstract
Disclosed herein is a method and system for controlling radio frequency (RF) output according to the change in impedance of biological cells. In the method of controlling radio frequency (RF) output according to a change in impedance of biological cells, phases of RF voltage and current applied to the electrode are detected and a difference between the phases is obtained. A change in impedance such as a resistance component and a capacitive reactance component (XC) of the biological cells at the time of performing cauterization is obtained. An inductive reactance component (XL) is connected to an RF output terminal so as to cancel the capacitive reactance component (XC) (XC=XL), thus enabling the output impedance to have a resistance component.
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