Ankle and knee effusion

Introduction Knee joint synovitis is the main cause of patency of the knee joint. Knee joint effusion is an immune regulation of its own, and it is a protective fluid secreted by the body. There is a small amount of joint fluid in the knee joint to nourish the articular cartilage, lubricate the joints, and reduce the friction during joint movement. The joint fluid is secreted by the synovial membrane, and the joint fluid continuously circulates and renews during joint movement. When the joint produces lesions or some systemic diseases occur, the joint fluid increases to form joint effusion, causing joint pain and discomfort. When the joint fluid exceeds 10 ml, the floating raft test is positive.

Cause

Knee joint synovitis is the main cause of patency of the knee joint. Synovitis is a kind of joint disease in which the synovial membrane is stimulated to produce inflammation, which causes the secretion to be dysregulated to form effusion. The knee joint is the joint with the most synovial membrane in the whole body joint, so the synovitis is more common in the knee. There is a small amount of joint fluid in the knee joint to nourish the articular cartilage, lubricate the joints, and reduce the friction during joint movement. The joint fluid is secreted by the synovial membrane, and the joint fluid continuously circulates and renews during joint movement. When the joint produces lesions or some systemic diseases occur, the joint fluid increases to form joint effusion, causing joint pain and discomfort. When the joint fluid exceeds 10 ml, the floating raft test is positive.

an examination

Related inspection

Synovial fluid visual inspection

Synovitis is a sterilized inflammation caused by poor microcirculation. The main symptom is the production of effusion. The production and absorption of joint fluid is a "dynamic balance". When there is a reabsorption of joint fluid, due to joint fluid The dynamic balance of production and absorption is broken, and the production of joint fluid is greater than that of reabsorption, and "joint water" appears.

Differential diagnosis

Knee joint effusion: The knee joint is swollen, sore or even unable to walk. B-ultrasound shows a large amount of joint effusion in the knee joint. The main symptom of ankle synovitis is the production of fluid. Knee joint synovitis is the main cause of patency of the knee joint. Synovitis is a sterilized inflammation caused by poor microcirculation. The main symptom is the production of effusion. The production and absorption of joint fluid is a "dynamic balance". When there is a reabsorption of joint fluid, due to joint fluid The dynamic balance of production and absorption is broken, and the production of joint fluid is greater than that of reabsorption, and "joint water" appears.

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