[Abstract] Objective To investigate the efficacy of radiofrequency windowing combined with semiconductor laser irradiation in the treatment of auricular pseudocysts. Methods Thirty-six patients with auricular pseudocysts were treated with radiofrequency windowing followed by semiconductor laser irradiation. Results: 35 cases were cured at once and 1 case was cured after 2 treatments, with a total efficiency of 100% and no infection or auricular deformity. There was no recurrence from 3 months to 1 year of follow-up. Conclusion The treatment of auricular pseudocysts by radiofrequency opening combined with semiconductor laser irradiation is effective, safe, simple and practical, without bleeding, less painful, easily accepted by patients, and clinically suitable for outpatient promotion. [Key words】Auricular pseudocyst; radiofrequency technology; semiconductor laser Auricular pseudocyst is one of the common diseases in otorhinolaryngology, and its prevalence is increasing year by year. In order to explore a better treatment method, our department has treated 36 cases of auricular pseudocysts with radiofrequency opening combined with semiconductor laser irradiation since March 2004, and achieved satisfactory results. 1, object and method 1.1, clinical data 34 cases were outpatients and 2 cases were inpatients. Among them, 35 cases were male and 1 case was female; age ranged from 23 to 56 years old, average 37.5 years old; the shortest duration of disease was 2 days and the longest was 2 months; all were monaural, 22 cases were in the right ear and 14 cases were in the left ear, including 11 cases in the auricular cavity, 7 cases in the auricular boat, 10 cases in the triangular fossa and 8 cases in the ear boat; 18 patients had a history of auricular massage, and the cause of the remaining cases was unknown; patients mostly found unintentionally auricular bulge with elasticity and fluctuating sensation, but no pressure pain The surface skin color was normal, and the puncture fluid was a pale yellow clear plasma exudative fluid. 1.2, materials South China brand SHP-II radiofrequency therapy instrument (produced by Guangzhou Medical Equipment Factory); SUNDOM-300I semiconductor laser therapy machine (produced by Beijing Santon Electronic Technology Co., Ltd.) 1.3, treatment methods 34 cases were treated in the outpatient clinic, and 2 cases were selected for inpatient treatment due to the combination of other diseases. After disinfecting the outer ear with iodine and alcohol, the patient was anesthetized with 2% procaine for peri-auricular infiltration, and the power level of the radiofrequency treatment instrument was adjusted to 3, and the negative pole was placed on the ipsilateral cheek of the affected ear near the cyst. The cyst cavity is then flushed with 2 ml of dexamethasone, and the auricle is wrapped with a homemade “snail” cotton ball under pressure, and treated with outpatient semiconductor laser irradiation for 1 week. No oral glucocorticoids or other treatments were required. 1.4, efficacy criteria Healing: local swelling disappears and the auricle returns to normal shape; Improvement: local swelling becomes smaller or local fibrous tissue thickens. Ineffective: no change in the size of the cyst before and after treatment. 2. Results: After one week of follow-up in the outpatient clinic, the bandage was removed and the cyst disappeared in 33 of 36 cases, and the cyst became smaller in one case. The total effective rate was 100%. No recurrence was seen during the follow-up period from 3 months to 1 year, and there were no other adverse reactions. 3. Discussion Auricular pseudocysts are common in clinical practice and are non-suppurative chondromyelitis within the auricular cartilage, and the effusion is a sterile plasmacytic exudate. The clinical manifestation of the disease is mainly a limited elevation of the auricle, which can be volatile and can usually be punctured and aspirated with yellowish fluid. A small number of patients exhibit a slight local burning or swelling sensation, and most patients are asymptomatic. Some scholars believe that auricular pseudocysts are not an infectious disease, but may be due to an immune reaction between autoantibodies and the keratinous tissue of the ear skin, resulting in the formation of cysts due to local exudation and aggregation of fluid; some scholars believe that auricular pseudocysts may be caused by mechanical stimulation of the auricle, resulting in impaired local circulation. At the same time, we also found that the age of onset of auricular pseudocysts in this group was more in young and middle-aged people, and there were significantly more males than females, while there was only one female case, whether it was related to gender should be further studied. There are many treatment methods for auricular pseudocysts, including puncture and fluid extraction followed by pressure bandaging or injection of drugs, incision and drainage, ultrashort wave, microwave, magnetic therapy and freezing, etc. All methods have their own characteristics, but the efficacy varies. The key to the treatment of auricular pseudocysts is to prevent the regeneration of the cyst fluid so that the cyst wall adhesions can heal. Radiofrequency is to act on the tissue by means of alternating current through bipolar electrodes, and a thin layer of plasma is formed between the electrodes and the tissue, the ions in the layer are accelerated by the electric field, and the energy is transferred to the tissue, which opens the molecular bonds at low temperature (450C~900C), causing the cells in the target tissue to disintegrate as molecular units and decompose into carbohydrates and oxides, resulting in the coagulation of tissue cell proteins, thrombosis and vascular occlusion, thus achieving The purpose of the treatment is to stop bleeding or make the tissue degenerate and atrophy. We select two radiofrequency points according to the lowest point of the sagging of the cystic fluid when the human body is standing and lying down, and use the thermal effect of radiofrequency to open two windows of the cyst to achieve the purpose of unobstructed drainage. Strict disinfection and aseptic operation are the steps that we perform carefully before radiofrequency treatment, and no case of purulent chondromyelitis has occurred in this group; after radiofrequency treatment, homemade sterile “snail” cotton balls are used to fill in the concavities of the lateral surface of the auricle, and the pressure of the wrapping material is appropriate in order not to affect the blood supply, which not only can not affect This not only does not affect the local circulation, but also avoids the thickening deformity of the auricle caused by the residual capsule fluid. There was one patient in this group whose cyst became smaller after the first treatment and needed to be treated again. This may be related to the incomplete absorption of the cyst fluid due to the patient’s failure to complete the treatment course, or to the inadequate compression of the cotton ball after radiofrequency treatment. The clinical application of laser has a history of many years, and its excellent efficacy has been familiar to people for a long time, and some scholars have tried to treat the disease with laser opening and drainage method, and achieved better results. We use its laser beam to irradiate human tissue, through the body stimulation to produce regulatory effect, improve blood and lymph circulation, accelerate metabolism, promote cell regeneration and inflammation output material absorption, so as to achieve the purpose of anti-inflammation and pain, reduce edema, accelerate tissue repair. We use such characteristics of the semiconductor laser to promote the absorption of cystic fluid, fibrosis and healing of cystic wall adhesions. Radiofrequency opening combined with semiconductor laser irradiation for auricular pseudocyst is a new method, after clinical application, we think it has the following advantages: 1, it is a simple, practical, safe and reliable treatment method, 2, good efficacy, few postoperative complications, 3, no intraoperative bleeding, patients suffer little pain and are happy to accept treatment, easy to promote outpatient.