Table 2. Block Outcome and Complications of Ultrasound-guided Femoral Catheter Placement in Anesthetized Patients.

	N = 488
Success rate of catheter placement	488 (100%)
Separation of fascia iliaca and femoral nerve after LA injection (= confirmation of success)	488 (100%)
Catheter placement (easy/difficult)	435 (89%)/53 (11%)
Confirmation of the position of the catheter tip by real-time ultrasound	384 (79%)
VNRS pain score (0–10) at postoperative time point
1 h	2.0 ± 1.2
6 h	3.5 ± 1.9
12 h	3.2 ± 1.7
24 h	2.9 ± 1.3
48 h	2.5 ± 1.1
Inadvertent catheter removal	14 (3%)
Femoral artery puncture	0 (0%)
Small vascular puncture	16 (3%)
Femoral abscess	0 (0%)
Neurologic complications (during 8 weeks of follow up)	0 (0%)

Values are expressed as mean ± SD or number of patients (%). LA: local anesthetic, VNRS: verbal numerical rating scale.