Subtalar Joint Arthrography.

: The purpose of this study was to determine the accuracy and the specificity of an optimum technique of posterior talocalcaneal/posterior subtalar (PST) joint arthrography and anesthetic injection in patients with hindfoot pain. Fifty-five PST joints were studied in 55 patients. The posteromedial approach was used in the first 24 patients, followed by an anterolateral approach in 31 patients. The ease of performance, success of confirming PST needle position, and adverse effects were noted. After contrast injection, a combination of 1% lidocaine and 0.5% bupivacaine was injected. Results consisted of 47 arthrographically confirmed PST injections. The posteromedial approach was deemed more difficult; three patients had tendon sheath opacification and four had unwanted anesthesia of the toes. The anterolateral approach was technically easier and no extra-articular structures were visualized or anesthetized. Therefore, PST arthrography with anesthetic injection is optimized with an anterolateral approach.