Table 3 Outcomes of patients who underwent single or multiple level transforaminal lumbar interbody fusion with and without erector spinae plane block. ESPB, erector spinae plane block; CV, coefficient of variation; POR, postoperative room; POD, postoperative day; IV, intravenous.
Variable | Non-ESPB | ESPB | p | Post-hoc Power |
|---|---|---|---|---|
Single level fusion | ||||
Number | 8 | 16 | ||
Mean arterial pressure difference (IQR) | 46.7 (11.0) | 45.5 (28.4) | 0.65 | 5.5% |
Coefficient of variation (IQR) | 14.5 (3.6) | 14.1 (6.8) | 0.58 | 6.8% |
Blood loss (IQR) | 275.0 (300.0) | 200.0 (175.0) | 0.19 | 65.5% |
Operative time (IQR) | 167.0 (13.0) | 153.0 (47.3) | 0.51 | 68.4% |
Blood loss per vertebrae (IQR) | 137.5 (150.0) | 91.7 (72.9) | 0.10 | 65.5% |
Operative time per vertebrae (IQR) | 83.5 (6.5) | 68.8 (16.6) | < 0.01 | 68.4% |
Multiple level fusion | ||||
Number | 22 | 14 | ||
Mean arterial pressure difference (IQR) | 47.1 (12.0) | 36.5 (16.6) | < 0.01 | 97.4% |
Coefficient of variation (IQR) | 14.7 (3.6) | 11.7 (3.0) | < 0.01 | 95.0% |
Blood loss (IQR) | 400.0 (287.5) | 275.0 (225.0) | 0.06 | 22.6% |
Operative time (IQR) | 190.0 (36.5) | 169.0 (48.8) | 0.55 | 16.4% |
Blood loss per vertebrae (IQR) | 122.9 (95.8) | 79.2 (78.8) | 0.17 | 25.0% |
Operative time per vertebrae (IQR) | 59.5 (16.7) | 61.0 (23.9) | 0.34 | 6.1% |
