Evaluation criteria
flexion deformity, pain
DRUG WITHDRAWAL, RECURRENCE, HAND SWELLING
In terms of VAS score, 0 point: no pain; 1-3 points: mild pain; 4-6 points: moderate pain; 10 points: severe pain. A higher score means severer pain. For HSS score, the total scores of pain, mobility, function, joint stability, flexion deformity and muscle strength are 30, 18, 22, 10, 10 and 10 points, respectively, and the full score is 100 points. A higher score represents better knee joint function. The efficacy was evaluated as follows: clinical control: The clinical symptoms such as pain and swelling disappeared, the knee joint motion returned to normal, the patient could stand and walk independently, and there was no recurrence after drug withdrawal; markedly effective: The clinical symptoms such as pain and swelling were improved significantly, the knee joint function was basically restored without affecting daily work and life; effective: Both pain and knee joint function were improved; ineffective: The clinical symptoms such as pain and swelling had no improvement, and the joint motion was restricted or even became worse. Total response rate - (clinical control + markedly effective + effective)/total cases × 100%.