The working principle of RF-grade high-frequency electrosurgery unit is that the working end of the electrode outputs high-frequency electromagnetic waves (not current), generally higher than 1.5MHz, which are concentrated in a small area through the electrodes.

Molecules are polar molecules and are affected by electromagnetic fields. Under the action of this local high-frequency electromagnetic field, the water molecules oscillate rapidly and hit the cell wall to break them, thereby achieving the purpose of cutting.

During high-speed motion, water molecules generate heat by friction (convert kinetic energy into heat energy), blood temperature increases, soluble protein in plasma becomes insoluble protein monomer, and thrombin turns protein monomer into protein polymer, protein polymers are intertwined with each other into a network, forming a blood clot within the blood cell network to complete the coagulation process.