Fig. 1

The infiltration technique for the percutaneous periarticular multi-drug injection into the muscle belly of the vastus medialis performed at the day following total knee arthroplasty for the left knee. a. Infiltration into the muscle belly of the vastus medialis just medial to the quadriceps tendon. b. Infiltration into the muscle belly of vastus medialis at a more medial site of the first infiltration. Note that we injected the solution into neither joint space of the knee nor subcutaneous tissue