Why can't ordinary high frequency electric knife ablate under the foraminal lens

The working principle of ordinary high-frequency electric knife and radio frequency high-frequency electric knife is different, which causes them to work in different environments. The working principle of the high-frequency electric knife is Ohm's law. When current passes through human tissue, heat is generated due to the impedance of the tissue. When the current is constant, the greater the impedance, the greater the heat. The cells are ruptured by heat to achieve the purpose of ablation. Radio frequency high-frequency electric knife, its working principle is that the electrode working end outputs high-frequency electromagnetic waves, concentrated in a small area, because the cells contain a large number of water molecules (water molecules are polar molecules and are affected by electromagnetic fields). Under the action of this local high-frequency electromagnetic field, water molecules oscillate rapidly and rub against each other, causing the water in the cell to evaporate, vaporize, dry tissue, shrink and cause aseptic necrosis, thereby achieving the purpose of ablation. The foraminal lens needs to be washed with normal saline when working to ensure the clarity of the foraminal lens. Physiological saline is a sodium chloride solution, which contains sodium ions and chloride ions, and is a conductive solution. When the high-frequency electrosurgical knife is working under the intervertebral foraminal mirror, flushing with saline will cause a short circuit, reduce the impedance, and lose its effectiveness. The radio frequency level high frequency electrosurgical knife outputs radio frequency through the high frequency endoscopic surgical electrode, and the electrode working end has two poles, forming a self-closed loop, which can work in a liquid environment and ensure safety.