Adaptive, return electrode monitoring system

Details Adaptive, return electrode monitoring system Adaptive, return electrode monitoring system

G - Physics

01

R

326/15

G01R 27/14 (2006.01) A61B 18/12 (2006.01) A61N 1/08 (2006.01)

Patent

CA 1200286

IMPROVED RETURN ELECTRODE MONITORING SYSTEM Abstract A return electrode monitoring system for use with a patient return electrode adapted for contacting a patient, the return electrode having two, spaced apart conductors attached thereto for connecting the electrode to a genera- tor of electrosurgical current which passes through the electrode, the system comprising means for applying a monitoring current through the conductors to the elec- trode; detecting means responsive to the monitoring current for producing a signal which is a function of the impedance between the two conductors, the detecting means including means for substantially eliminating any effect the elec- trosurgical current might have on the production of the signal when the generator is operational and the patient is in contact with the electrode; means for establish- ing a desired range having at least an upper limit for the impedance; and determining means responsive to the signal for determining whether the impedance is within the desired range. The system also includes means for estab- lishing a desired range having an upper limit and a lower limit for the impedance when the patient is in contact with the electrode elements; determining means responsive to the signal for determining whether the impedance is within the desired range; and adjusting means for adjust- ing the upper limit to adapt the system to the particular impedance of the patient in response to the particular impedance occurring within the desired range.

413745

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