Influence of surface effect on the resistance of electrodes of electrosurgical instruments

The paper presents a study of the influence of the surface effect on the environments involved in electrosurgical interventions. Taking into account the influence of the surface effect when designing new electrosurgical instruments allows reducing overheating and necrosis of living biological tissues, which is of practical interest and is a topical task. The authors plot frequency dependences of the depth of the surface layers of electrodes and biological tissues. For biological tissue, the depth of the surface layer is at a frequency of 440 kHz is considerable, about 1 m. For copper, at such a frequency, the depth of the surface layer is 0. 1 mm. Using the example of round and rectangular electrodes made of copper and stainless steel 410, in a wide frequency range (1 kHz – 1 MHz), the resistance values of these electrodes are calculated. The work shows that increasing the outer perimeter of the electrode reduces its resistance. Thus, increasing the total length of the outer perimeter of the electrode, allows you to increase its effective area conducting high-frequency current, which creates conditions for increasing the efficiency of electrosurgical instruments.