4.3. Intervention
STERILE
A physician of our institute with expertise in IA injections performed the treatment according to the following technique. In both groups, 32 mm (22 G) sterile needles were used. We performed IA injections with a masked syringe on supine patients with the knee flexed at 90, in sterile conditions (skin cleanse and double disinfection with iodopovidone 7.5%). The injection approach performed was anterior and lateral to the patellar tendon and between the inferior margin of the lateral femoral condyle and the superior margin of the tibial plateau. No pre-medication or anesthesia were used.