According to arthroscopy and the analysis of joint fluid,24 cases were serious exudation and 19 cases were fibrinous exudation.

• 依据关节穿刺液的性质和关节镜下所见分期：浆液性渗出期24例，浆液性纤维蛋白渗出期19例，通过半年以上随访进行疗效评定。