The Difference between Electrosurgical Unit and Ultrasonic Knife

The Difference between Electrosurgical Unit and Ultrasonic Knife

The principle of electrosurgical unit cutting is to generate voltage and current at the tip of the electric knife, and generate high temperature when in contact with the skin to cut tissue.

The application principle of ultrasonic knife is to convert electrical energy into mechanical energy through a special conversion device, and the mechanical energy transmitted in the form of sine waves acts on the metal knife head at the front end, causing the knife head to produce 50-100 μ The mechanical oscillation of m amplitude generates frictional heat and shear forces on both sides due to tissue tension, causing water vaporization within the tissue cells in contact, breaking protein hydrogen bonds, denaturing proteins, and cutting open the tissue after solidification. The application of ultrasonic scalpel in laparoscopic surgery has obvious advantages.

The damage of ultrasonic scalpel to surrounding tissues is much smaller than that of high-frequency electric scalpel. Its precise cutting effect allows it to separate and cut important organs and large blood vessels, and less smoke and scabs make the laparoscopic surgery field clearer, shorten the surgery time, and have no electric current passing through the human body, making the surgery more efficient and reducing the occurrence of complications.