Ultrasonography-Guided Lumbar Periradicular Injections for Unilateral Radicular Pain

Table 2

Procedure characteristics.

Characteristic	IP technique; ()	OP technique; ()
Patient treated, (%)	23 (96.0)	20 (95.2)	0.567
Patient failed, (%)	2 (4.0)	1 (4.8)
Correct spinal segment identification, (%)	24 (100)	20 (100)
Accuracy of US- guided injection confirmed by CT, (%)	22 (95.7)	19 (95.0)	0.720
VAS (SD) after injection	3.62 (0.81)	3.21 (0.90)	0.485