Adenoid hypertrophy is a common and frequent disease in children and adolescents, which can cause a variety of symptoms in the ear, nose, pharynx, larynx and lower respiratory tract, and in severe cases, it often causes systemic diseases, resulting in poor development and nutritional status of the children [1]. 2009-04-2009-08, the author performed nasal endoscopic low temperature plasma melting of adenoids in 21 children with adenoid hypertrophy, and achieved satisfactory results. The results were satisfactory and are reported below. 1. Data and methods 1.1 Clinical data 21 cases of children with adenoid hypertrophy, 15 males and 6 females; age 5-10 years old, average (8.1±3.5) years old. There were 6 cases with tonsillar hypertrophy, 4 cases with pediatric rhinosinusitis, and 2 cases with secretory otitis media. Diagnostic criteria for adenoid hypertrophy: the ratio of adenoid thickness value A (vertical distance from the most prominent point of adenoids to the skull base) / nasopharyngeal width value N (distance between the posterior end of the hard palate to the intersection of the pterygoid plate and the skull base) ≥ 0.71 on lateral nasopharyngeal radiographs was considered pathological hypertrophy, which was confirmed by simultaneous electronic nasopharyngoscopy in the examined cooperative children. 1.2 Methods Under general anesthesia with endotracheal intubation, the child was placed in a supine position with the shoulders padded and the head low, and a thin catheter was inserted through the bilateral anterior nostrils to pull up the uvula and soft palate to expose the nasopharynx and adenoids. The ENTCoblator II low-temperature plasma surgical system from Arthrocare, USA, was used, and the EIC5870-1 head was connected to the 70, with an initial energy of 7 levels of cutting and 3 levels of hemostasis, respectively, and the energy controller was used to adjust the saline flow, and the foot pedal controlled the cutting and hemostasis of the head. The operator stood on the right side of the patient and performed tympanic tube placement at the same time; children with tonsillar hypertrophy had their tonsils completely removed along the perineum at the same time with the plasma knife; those with rhinosinusitis were treated with standardized treatment at the same time. After the operation, the children were given intravenous antibiotics for 3 d and oral antibiotics for 4 d. After the operation, the children were closely monitored for blood leakage and fed a liquid or semi-liquid diet after 6 h. After 24 h, they were fed a normal diet. After the operation, the child was in good spirits, no painful eating and no mischoking, and the quality of breathing and sleep improved significantly. 1 week later, electronic nasopharyngoscopy showed that there was no adenoid residue in the nasopharynx, and the normal tissue structure around the nasopharynx had no damage. There was no recurrence and no complications such as damage to the eustachian tube, and all the associated diseases were cured at six months follow-up. In the traditional transoral adenoidal scraping, the adenoids are removed with the adenoids scraping spoon in the median position, and then replaced by a smaller scraping spoon to remove the residual tissues on both sides after scraping off most of the tissues, which relies on the operator’s experience and sensory operation. Therefore, it is not easy to completely remove the adenoids [2-3]. The postoperative pain is severe, and the patient is prone to pharyngeal occipital injury and postoperative bleeding. The dyeing of the diaphragm ≡ mythical freshness is a slack yttrium sprite 浔Vち嗣魇酉虑芯幌 傺宀 ⒈ acenaphthene pelican [3], but hemostasis is still needed. The use of cotton balls or gauze compression hemostasis, the effect is not exact; using electrocoagulation, radiofrequency, laser, microwave and other hemostatic methods, the damage to the tissue is large, the patient pain degree is heavy, and the postoperative adenoids surface formation of pseudomembrane, necrosis off, easy to complicate bleeding. Low temperature plasma melting and excision is to use the energy generated by bipolar radiofrequency to form a plasma field between the radiofrequency head and the target tissue with physiological saline as the delivery medium. Under the effect of voltage gradient, the charged particles in the plasma accelerate and gain enough energy to open the molecular bonds of the tissue cells, which are cleaved into simple carbohydrates and oxides at 40-70°C for the purpose of tissue ablation [4]. When the set energy value is lower than the threshold value for plasma generation, the electrical resistance of the tissue leads to a thermal effect that produces hemostasis or tissue contraction. Combined with 70°nasal dyeing eulogy allows a total of posthumous post-operative pen youlu school among picking up the harmonious segmentв胫寡既范雀撸宰枞蟊强准我胶蟊强椎南傺遄橹部梢杂行ÌÌ杏氤沟字寡1ǜ娴21 children because plasma surgery minimizes thermal injury and local tissue trauma, so postoperative wound pain is mild, local edema is not obvious, eating on the first postoperative day without discomfort, no postoperative bleeding, simple care, recovery and The child’s family was happy to accept it. This procedure requires a high degree of proficiency in the use of the plasma knife, requiring accurate hand and foot coordination as well as good control of the time and angle of cutting and hemostasis to avoid cutting too deeply or damaging the surrounding structures. The drip rate of physiological saline should also be adjusted to synchronize with the cutting and hemostasis, otherwise the plasma production and efficacy will be directly affected. When cutting adenoids, it is important to avoid cutting for too long at a time to allow adequate vaporization of the tissue and timely aspiration from the negative pressure suction pathway. Repeated punctiform pedaling can avoid clogging of the tip. In older children and children with small openings, such as adenoids growing in the direction of the posterior nostril, the accuracy of melting is limited by the curvature of the plasma knife itself; at the same time, the high price of the plasma knife and the fact that it is not covered by medical insurance in some areas have affected the promotion of its use.