MRI-Based Identification of an Appropriate Point of Needle Insertion for Patients with Idiopathic Carpal Tunnel Syndrome to Avoid Median Nerve Injury
Figure 3
(a) Wrist of a patient with severe CTS at the level of the distal part of the distal radioulnar joint. The median nerve is enlarged and can be seen as a high-intensity area on the MRI. Insertion from the entry point close to the ulnar side of the PL results in contact between the needle and the nerve. Insertion from C and D leaves a narrow margin between the needle and the nerve. *Median nerve. (b) Wrist of a patient with extremely severe CTS. At the level of the distal part of the distal radioulnar joint, the median nerve is enlarged and can be seen as a high-intensity area on the MRI. Insertion from the entry point close to the ulnar side of the PL and FCR results in contact between the needle and the nerve. *Median nerve.
