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Med Instrum. 1985 Mar-Apr;19(2):83-7.

Electrical impedance properties of the body and the problem of alternate-site burns during electrosurgery.


The radiofrequency (RF) impedance at 500 kHz was measured between multiple contact points on the bodies of six healthy volunteers by a tetrapolar measurement technique. The impedance between various contact points was predictable and could increase by a factor of two, depending on the sites selected for electrode application. These results were related to a simple resistive model of RF current distribution through the body. Based on the model and on data from human subjects, a hierarchy of optimal locations was developed to minimize the impedance between a surgical site and a dispersive electrode site and to reduce the potential for alternate-site burns from electrosurgery.

[Indexed for MEDLINE]

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