Ultrasound-guided, direct suprainguinal injection for fascia iliaca block for total hip arthroplasty: A retrospective study

Table 2 The use of intraoperative and postoperative analgesics

Analgesics	No-block group (n = 15)	Block group (n = 16)	P value
Intraoperative remifentanil dose (μg)	316.0 ± 62.5	103 ± 37.9	< 0.01
Fentanyl given by intravenous titration in the PACU (μg)	22 ± 8.6	1.9 ± 4.0	< 0.01
Fentanyl consumption by PCIA device in 48 h after operation (μg)	406.6 ± 70.9	204.3 ± 43.0	< 0.01

PACU: Post-anesthesia care unit; PCIA: Patient-controlled intravenous analgesia.