System and method for augmented impedance sensing

Details System and method for augmented impedance sensing System and method for augmented impedance sensing

Category

G - Physics

Subcategory

01

Subsubcategory

R

IPC codes

G01R 35/00 (2006.01) A61B 18/12 (2006.01)

Type

Patent

Patent number

CA 2713004

Description

An impedance monitoring circuit for an electrosurgical generator is disclosed. The monitoring circuit includes an isolation transformer coupled to at least one of an active terminal and a return terminal of an electrosurgical generator, wherein the isolation transformer includes a primary winding coupled to a reference resistor and a secondary winding coupled to a load. The monitoring circuit also includes a driver configured to transmit a sensor signal to the reference resistor and the load, a primary converter coupled to the reference resistor and the load and configured to detect a primary converted signal as a function of the sensor signal passing through the reference resistor and the load. The monitoring circuit further includes a secondary converter coupled to the driver and configured to detect a secondary converted signal as a function of the sensor signal prior to passing through the reference resistor and the load and a controller configured to determine a fault condition based on the primary and secondary converted signals.

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