Comparison of plasma levobupivacaine concentrations with and without epinephrine following erector spinae plane block for breast cancer surgery: a randomized controlled trial

Table 2 Intraoperative opioid consumption and postoperative pain scores

	Group L	Group LE	P value *†
Sample size, n	14	15
Intraoperative opioid consumption
Mean fentanyl dose (SD; µg)	276.4 (41.7)	263.7 (41.9)	0.42
Mean remifentanil dose (SD; µg/kg/min)	0.11 (0.01)	0.11 (0.02)	0.76
Median postoperative NRS (IQR)
Soon after extubation	0.0 (0.0–2.8)	0.0 (0.0–3.0)	0.45
5 h after the ESP block	3.0 (2.8–3.5)	4.0 (2.0–5.0)	0.65
9 h after the ESP block	2.0 (1.0–3.0)	2.0 (1.0–4.0)	0.60

^*P value for comparison between groups L and LE. † The t-test was used to compare means and the Mann–Whitney U-test was used to compare medians. SD standard deviation, NRS numerical rating scale, IQR interquartile range, ESP erector spinae plane

ISSN: 1471-2253