Dispersive electrode skin burns during electrosurgery

Details Dispersive electrode skin burns during electrosurgery Dispersive electrode skin burns during electrosurgery

A - Human Necessities

61

B

A61B 18/16 (2006.01)

Patent

CA 2280313

This invention relates to skin burns at the return electrode site (dispersive electrode, pad electrode, ground pad) that have been experienced during transurethral prostactectomy, Hysteroscopic surgery and other types of electrosurgery even when dispersive electrodes with a Return Electrode Monitoring (REM) system are used. The mechanisms of burn is temperature rising over 45°C at the electrode/skin interface due to excessive current density exceeding the dispersive capacity of pad electrode. In particular this invention is to develop dispersive electrodes with temperatures sensors and alarms, similar to the REM system, warning with flashing lights and/or sound and deactivating the electrical generator (ESU) when the temperature at the electrode/tissue interface rises above 45°C. To avoid or minimize the risks of such an injury the surgeon should consider the following: use the minimum effective power output to vaporize the intended tissue; avoid prolonged activation intervals of the ESU and allow sufficient time between activation periods to dissipate the heat built up at the dispersive electrode/skin interface; consider dispersive electrodes with larger surface area; consider dispersive electrodes with temperature sensors and alarms, similar to the REM system, deactivating the ESU when temperature rises to inappropriate levels; and/or consider bipolar electrosurgical technology, such as coaxial bipolar electrodes (Versapoint TM) that cut, desiccate and vaporize intrauterine lesions in a saline environment.

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