Comparison of Difference Hydrodissection for CTS

Carpal tunnel syndrome (CTS) is the most common peripheral entrapment neuropathy with involving compression of the median nerve in the carpal tunnel. Rather than other progressive disease, CTS is characterized by remission and recurrence. The hydrodissection could decrease the entrapment of nerve to restore blood supply. Despite the hydrodissection was pervasively used in clinical practice, current researches contain small participant without control group or randomized leading to foreseeable selection bias. The investigators design a randomized, double-blind, controlled trial to assess the effect of different method of ultrasound-guided hydrodissection in patients with CTS.