Novel Motor-Sparing Ultrasound-Guided Neural Injection in Severe Carpal Tunnel Syndrome: A Comparison of Four Injectates

Figure 2

Ultrasound-guided short-axis injection image. (a) The position of in-plane short-axis injection at proximal inlet of carpal tunnel. (b) The short-axis view shows that the MN was separated from the subsynovial connective tissue and flexor tendon superficialis/profundus via hydrodissection (HD) (: injectate). (c) The short-axis view shows that the MN was separated from the flexor retinaculum (arrows) via HD (: injectate). MN: median nerve; FDS: flexor digitorum superficialis; FDP: flexor digitorum profundus; FPL: flexor pollicis longus.

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