Development and application of plasma Plasma technology is one of the newer surgical procedures developed in recent years and is widely used in ENT, such as palatoplasty for snoring, nasal, head and neck tumors in adults, and in children, mainly for tonsils, adenoids and laryngeal papillomas and pharyngeal and tongue root tumors. In the countries I have visited and studied, such as the United Kingdom and the United States, most of the large children’s hospitals are currently using this technology; in China, plasma has also developed rapidly in the past two years, and some large tertiary hospitals have been equipped with plasma instruments and use this technology; in our hospital, this technology is mainly carried out in the Children’s Hospital in Renminzhong Road. The principle of plasma technology adopts bipolar circuit, through radiofrequency energy to form a thin layer of plasma between the cutter head and the tissue electrolyte, the ions in the layer are accelerated by the electric field, and the energy is transferred to the tissue, opening the molecular bonds, producing carbohydrates and chlorides, resulting in tissue coagulation and necrosis, the necrotic tissue is shed and absorbed by the fiber tissue repair to produce scar contraction, the ablation site is uniform, no charring, the treatment head does not stain the tissue, and the precise selectivity is high. And precise selective high, no damage to the surrounding tissue. Due to the low kinetic energy of plasma, the temperature of the working interface is 400C~700C, so it is also called low temperature plasma ablation. Because of its low working temperature, the damage to the preserved mucosa is light, and the cut wound is smooth and neat, which is conducive to the formation of postoperative protein pseudomembrane and wound healing, and reduces the probability of postoperative adhesions. In addition, plasma radiofrequency also has the function of intraoperative hemostasis, which can stop bleeding while cutting, which facilitates the surgical process.