The electrical dynamics of laparoscopic sterilization.

The minimum voltage needed to perform laparoscopic sterilization was studied to learn more about prevention of bowel burns. Using a "CUT" waveform at very low levels, it is practical to coagulate fallopian tubes with as little as 100 volts peak. If electrosurgical cutting of fulguration (charring) is desired, the nimimum voltage is about 700 volts peak. The changes in electrical resistance of tissue were measured during coagulation of sample tissues and actual sterilizations. A discussion of basic electrosurgical principles is included.