Ultra-minimally invasive nasal endoscopic surgery contains a finer endoscope, the general nasal endoscope is 4.0mm, the finer 2.7mm ultra-fine nasal endoscope 1.9mm, the thinnest fiber nasopharyngoscope 1.8mm, not only can be almost painless examination, but also without removing the normal structure can enter the narrow nasal tract, only to remove the extra swollen mucosa and polyps, to preserve the things given by parents, the so-called body hair and skin, by It is said that the body’s hair and skin are the parents of the mother and father, so we dare not destroy the injury easily. The final result achieved is similar to non-invasive, and even with nasal endoscopy no traces of surgery can be seen, which is especially suitable for cases where the disease is first diagnosed in time. The ultra-fine nasal speculum is particularly effective in the treatment of rhinorrhea for finding bleeding points. Since the examination can be done directly without anesthesia, the “original” nasal cavity can be observed, making it easier to detect lesions and bleeding points. For healthy people with nasal polyps and nasal tumors in the family, subclinical lesions can be detected with ultra-fine endoscopy when there are no symptoms, so that early treatment can be provided, nasal protection can be strengthened, and appropriate medication can be applied to prevent aggravation of the lesions. Prevention is the best treatment. Conventional endoscopy and CT are not yet able to detect lesions in this period. Blunt forceps removal becomes sharp excision, surgical forceps and cutters are sharp shearing way to remove the lesion tissue, changing the original tearing way and avoiding the side injury. Avoid endoscopic strong light thermal burns, the main method is to reduce the use time of endoscope, try to use headlamp more often, flush water regularly when using endoscope, clean the operative cavity, show clear operative field, and also avoid too much too strong attraction to better protect the mucosa. Pay attention to hemostasis during surgery, and stop bleeding completely at the end of surgery with less or even no filling. The use of new biodegradable materials to fill the surgical cavity, better support and promote mucosal recovery, can significantly reduce the number of drug changes and reduce patient pain. Disadvantages: fine equipment, easily damaged, expensive materials, increased costs, and some costs cannot be covered by health insurance. Light is not bright enough image is not as clear as conventional endoscopy, the scope seen is small if used improperly but easy to miss diagnosis, so it should be decided by the doctor according to the situation whether to use. A case of nasopharyngeal carcinoma that cannot be shown by CT Li The CT of nasopharynx was normal, and endoscopy found that the mucous membrane changed color and bleeding easily, and the disease was detected as nasopharyngeal carcinoma. The treatment effect was good. (Some scholars’ statistics: 9% of patients have disease in the nose but normal CT, and 15% of those who found abnormal CT of sinuses on examination did not feel any discomfort). 2. A case of delayed diagnosis and treatment of nasopharyngeal cancer due to inability to tolerate routine nasal endoscopy. Wang was advised to have nasal endoscopy for tinnitus by doctors in outside hospitals for many times, but the examination was interrupted by nasal stenosis and painful bleeding during the examination, and was later found to be nasopharyngeal cancer after completing the examination with a fine mirror in our hospital. The treatment effect was good. 3. A case of olfactoryoblastoma, which was normal in CT and regular nasal endoscopy, was diagnosed as olfactoryoblastoma. So it is said that medical trusts are disguised as killing people, cherish life, stay away from medical trusts!