Synovial thickening

Introduction Normal joint synovial fluid is an alkaline liquid. As the joints increase, the exudation increases, the acid products in the joints accumulate, and the synovial fluid becomes acidic, which promotes the precipitation of cellulose. If the effusion is not cleared in time, the joint synovial membrane will stimulate the long-term inflammation. The synovial membrane is gradually thickened, and the fibers are mechanized, causing adhesions and affecting the normal joint activities. Most knee synovitis is complicated by various knee injuries and the like, but it can also be caused by knee osteoarthritis alone or secondary to the elderly.

Cause

The synovial membrane and the joint capsule have lesions. More common synovitis.

an examination

Related inspection

Joint cavity fluid examination, general radiography, examination of bone and joint soft tissue CT examination

Most knee synovitis is complicated by various knee injuries and the like, but it can also be caused by knee osteoarthritis alone or secondary to the elderly. In young adults, there is a history of acute knee trauma. After the injury, mild edema, pain, limited mobility, and lameness begin to occur in the knee joint. Synovial reactive effusion usually occurs 6-8 hours after injury, and the knee joint is obviously swollen and feverish, and does not dare to move. Examination revealed that knee flexion and extension activities were limited, squat difficulty and pain, and there were localized pressure points around the joints, and the floating sputum test was positive. Chronic injury synovium, there may be no obvious history of trauma, mainly characterized by soft knee joints and limited mobility, swelling continues to linger, do not dare to squat. When the activity increases, it increases, and the rest is relieved. For a long time, you can get a feeling of hypertrophy of the knee capsule. For patients with multiple knee effusions or recurrent effusions, joint effusion examination can be performed, which can reflect the nature and severity of synovitis. Therefore, joint puncture and synovial fluid examination have important reference value for the diagnosis and differential diagnosis of knee joint synovitis.

Differential diagnosis

Knee joint trauma synovitis, easily misdiagnosed as "benign joint pain", given simple symptomatic treatment, poor results and often left behind sequelae. Because the degree of synovial lesions and synovial fluid exudation changes positively with the increase of intra-articular pressure and oxygen partial pressure, the oxygen partial pressure in the joint cavity is increased, the intra-articular pressure is reduced, and inflammation absorption and synovial repair are promoted. effect.

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