MRI-Based Identification of an Appropriate Point of Needle Insertion for Patients with Idiopathic Carpal Tunnel Syndrome to Avoid Median Nerve Injury

Table 2

Rate of contact to the median nerve through 5 different insertion points in 3 stages of CTS patients.

Stage		A: FCR	B: PL	C: PL&FCU	D: FCR&FCU	E: Distal crease
Moderate	58 (no PL: 2)	5 (8.6%)	37 (66.1%)	*0	**0	1 (𝑛=23, 4.3%)
Severe	74 (2)	5 (6.8%)	47 (65.3%)	2 (2.8%)	1 (1.4%)	1 (𝑛=24, 4.2%)
Extremely severe	48(3)	5 (10.4%)	37 (82.2%)	*5 (11.1%)	**4 (8.3%)	6 (𝑛=24, 25%)

^∗𝑃=0.014, ^∗∗𝑃=0.039.