Factor | ESPB (n=50) | PVB (n=50) | P value |
Median time to perform procedure in min/side (IQR) | 1.9 (1.0–2.5) | 4.1 (3.3–6.4) | <0.001 |
Median fentanyl requirement during block procedure in µg (IQR) | 50 (50–50) | 50 (50–50) | 0.525 |
Average NRS pain during block (IQR) | 2.0 (1.0–2.0) | 2.0 (1.0–2.0) | 0.609 |
Worst NRS pain during block (IQR) | 2.0 (2.0–4.0) | 3.5 (2.0–4.8) | 0.054 |
Test used: Wilcoxon-Mann-Whitney test.
ESPB, erector spinae plane block; NRS, Numeric Rating Scale; PVB, paravertebral block.