The needle is inserted just posterior to the medial portion of the patella and is directed slightly posteriorly and slightly inferiorly.
Reproduced from Owen DS. Aspiration and injection of joints in soft tissue. In: Textbook of Rheumatology, 4th edition, Kelley WN, Harris ED Jr, Ruddy S, et al (Eds), WB Saunders, Philadelphia 1993. p.545.
