What is arthroscopic surgery? Arthroscopic surgery is performed by inserting a metal tube with an illuminated lens into the joint cavity through a very small incision hole and magnifying the image on a monitor inside the joint to observe the lesion inside the joint, so it is more accurate than what can be observed by the naked eye after the joint is cut open, and at the same time, from another small incision hole, instruments for examination or surgery are inserted to conduct a comprehensive examination and perform surgery under television surveillance. It is a minimally invasive surgery that has been developed only in recent years. What are the characteristics of arthroscopic surgery? The arthroscope can see almost all parts of the joint, so it is more comprehensive than cutting the joint; because the image is magnified, it is more accurate than cutting the joint; because the incision is small, the trauma is small, the scar is small, the recovery is fast, and there are few complications. The diagnosis of difficult joint diseases and injuries that have plagued patients for many years can often have an immediate effect. In a nutshell, it is a simultaneous examination and surgery, examination and treatment. Arthroscopic surgery indications 1. Diagnostic examination of knee joint: including examination of knee joint disorders with unclear clinical diagnosis, biopsy of intra-articular lesions, diagnostic confirmation before open surgery, preoperative evaluation of total knee joint replacement or high tibial osteotomy for unicompartmental osteoarthritis to obtain visual information of the condition; 2. Total excision, subtotal excision, partial excision and suture of meniscal or disc cartilage injury and degeneration 3. synovial biopsy and synovectomy for different types of synovitis, including rheumatoid arthritis and other synovial lesions; 4. joint debridement and irrigation and drainage for septic arthritis; 5. focal removal for knee tuberculosis; 6. wrinkle resection for synovial strangulation syndrome.