Increased joint fluid

Introduction When the joint produces lesions or some systemic diseases occur, the joint fluid increases to form joint effusion, causing joint pain and discomfort. 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 lesions: rheumatoid arthritis, senile osteoarthritis synovitis, advanced exfoliative synovitis, pigmented villonodular synovitis, knee synovial tuberculosis, knee synovial sarcoma. In the early stage of septic arthritis, serous exudation can occur, and empyema can be caused in the late stage.

Systemic diseases: severe anemia, hypoproteinemia, chronic nephritis-induced renal effusion, hemophilic arthritis.

Adjacent joint lesions of the knee joint can also cause joint effusion.

an examination

Related inspection

Joint cavity fluid examination joint examination

Mainly manifested as joint congestion and swelling, pain, difficulty in squatting, limited function.

For those with more knee effusion or recurrent effusion, joint effusion can be checked. When the joint fluid exceeds 10ml, the sputum test is positive. It 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

For patients with multiple knee joint effusions or repeated fluid accumulation, joint effusion examination can be done. When the joint effusion is more, the clinical examination is easy to detect, and vice versa. The contrast of ultrasound imaging technology has its unique advantages.

1 The normal echo zone of the genic fluid in the knee joint is less than 0 2cm, and more than 0 3cm can be considered to have knee joint effusion;

The incidence of knee joint effusion in patients with 2RA is high, and the change of fluid volume is related to ESR, which can be used as one of the observation indicators of disease changes.

Therefore, ultrasound imaging is a simple, non-invasive, fast and superior method for the diagnosis of knee effusion. High-frequency ultrasound is an objective and accurate method for diagnosing knee joint fluid lesions.

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