Ultrasound-guided Injection of Glucocorticoid Into Infrapatellar Fat Pad in Patients With Knee Osteoarthritis

The product of the glucocorticoid is betamethasone injectable suspension and the dosage is 1 ml. To alleviate the discomfort on local tissues, the suspension injected into the infrapatellar fat pad will be pre-mixed with 0.5 ml saline and 0.5 ml lidocaine. That is, the total amount of the drug injected into the infrapatellar fat pad for the glucocorticoid group will be 2.0 ml.

A total of 2.0 ml drug including 1.5 ml saline and 0.5 ml lidocaine will be injected into the infrapatellar fat pad for the placebo group.

After completing the process of infrapatellar fat pad injection, the participants in both groups will receive 2.5 ml hyaluronic acid suspension injection through the suprapatellar bursa into the intra-articular space.