What are the principles of treatment for meniscus injuries of the knee? The meniscus of the knee joint can be easily damaged, but there are different periods, and in different periods, the treatment given varies, but many patients would like to simply understand what are the methods of treating meniscal injury of the knee? 1.Acute stage If the joint has obvious fluid (or blood), the fluid should be extracted under strict aseptic operation; if the joint has “interlocking”, the “interlocking” should be released by manipulation, and then the knee joint should be fixed in the straight position with a tubular cast from the upper 1/3 of the thigh down to the ankle. 4 weeks. The cast should be properly shaped so that the patient can walk with the cast on the floor. During the fixation period and after the removal of the fixation, the quadriceps should be actively exercised to prevent muscle atrophy. 2. Chronic phase If non-surgical treatment is ineffective, symptoms and signs are obvious and the diagnosis is clear, the damaged meniscus should be surgically removed as early as possible to prevent traumatic arthritis. After surgery, the knee should be bandaged in the extended position, and the next day the quadriceps muscle should start to do resting contraction exercises, and 2-3 days later the straight leg raising exercise should be started to prevent quadriceps muscle atrophy, and two weeks later the patient should start to walk on the ground, and the normal function can be restored in 2-3 months after surgery. Arthroscopic application Arthroscopy can be used for the treatment of meniscus injury. Meniscus edge tears can be repaired with sutures, and partial meniscus resection is usually performed to preserve the undamaged part. For early suspected meniscus injury, emergency arthroscopy is feasible to treat meniscus injury early, shorten the treatment course, improve the treatment effect and reduce the occurrence of injurious arthritis. It is less traumatic and quicker to recover through arthroscopic surgery.