The Effectiveness of Ultrasound-Guided Steroid Injection Combined with Miniscalpel-Needle Release in the Treatment of Carpal Tunnel Syndrome vs. Steroid Injection Alone: A Randomized Controlled Study

Figure 1

The procedures of steroid injection and MSN release. (a) Sonogram showing steroid injection using out-of-plane method in a 41-year-old woman. The white arrowhead refers to the transverse carpal ligament. The red arrowhead refers to the needle tip. MN: median nerve. FCR: flexor carpi radialis. FPL: flexor pollicis longus. 1: scaphoid bone. 2: lunate bone. 3: triquetral bone. (b) Sonogram of MSN release using inplane method in a 51-year-old man. The red arrowheads refer to the MSN shaft which is seen as a hyperechoic bright line. (c) Operation diagram of MSN release in a 55-year-old woman showing the position of the transducer and the MSN during inplane method for carpal tunnel decompression. (d) When the MSN was withdrawn, only a pinhole can be seen in the patient’s wrist.

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