Perioperative local infiltration anesthesia with ropivacaine has no effect on postoperative pain after total hip arthroplasty

Figures & data

Figure 1. CONSORT 2011 flow chart of patients throughout the study.

Table 1. Baseline demographic of study patients

	Placebo (n = 54)	Ropivacain (n = 55)
Age	65 (24–88)	66 (49–85)
Sex: F / M	36 / 18	40 / 15
ASA: 1 / 2 / 3 / 4	11 / 33 / 9 / 1	8 / 40 / 7 / 0
Smoking
Never	47	46
Sometimes	5	2
Daily	2	7
BMI	27 (20–39)	26 (20–41)
Time of surgery, min	70 (42–123)	74 (45–122)
Charnley class	1 (1–3)	1.5 (1–3)
NRS mobilized preoperatively	5.5 (2–10)	6 (2–10)

Data are mean or median (range) where appropriate.

Figure 2. Box plot showing pain score (NRS) during mobilization in the post-anesthesia care unit (PACU) and on the first postoperative day. The horizontal lines indicate median. The boxes represent interquartile range and the whiskers extend to the minimum or maximum case/value within 1.5 times the height of the boxes.

Table 2. Results

	Placebo	Ropivacaine	p-value
NRS mobilized PACU	3 (2–4)	3 (0–4)	0.7
NRS mobilized day 1	4 (3–5)	4 (3–5)	0.3
NRS rest PACU	2 (1–3)	2 (0–3)	0.4
NRS rest day 1	2 (1–3)	2 (1–3)	0.4
Opioid use PACU, mg	0 (0–3.1)	0 (0–5)	0.9
Oxycodone use day 1, mg	20 (10–30)	20 (10–30)	0.4
Mobilized day 1, h	9 (7–12)	9 (6–11)	0.7
LOS, days	2 (2–3)	3 (2–3)	0.5

Data are median (interquartile range).