Table 2.
Intraoperative data
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | Early complications (< 30 d) |
Late complications (> 30 d) |
No complications | p-value (3–2) | p-value (4–2) | p-value (4–3) | |||||
| n = 92 | % | n = 23 | % | n = 49 | % | n = 20 | % | ||||
| Previous Spine operations -Total | 27 | 29.3 | 8 | 34.7 | 15 | 30.6 | 4 | 20.0 | 0.73 | 0.29 | 0.38 |
| Nucelotomies | 8 | 8.6 | 2 | 8.7 | 4 | 8.2 | 2 | 10.0 | 0.94 | 0.89 | 0.81 |
| Spinal canal decompressions | 19 | 20.6 | 6 | 26 | 11 | 22.4 | 2 | 10.0 | 0.74 | 0.18 | 0.24 |
| Fused segments | 5.2 ± 2.2 | 4.8 ± 1.9 | 5.6 ± 2.5 | 4.7 ± 1.6 | 0.16 | 0.89 | 0.14 | ||||
| Dorsoventral approach | 35 | 38 | 8 | 34.7 | 23 | 46.9 | 4 | 20.0 | 0.34 | 0.29 | < 0.05 |
| Pedicle Screw augmentation | 16 | 17.3 | 6 | 26 | 6 | 12.2 | 4 | 20.0 | 0.15 | 0.65 | 0.41 |
| Vertebroplasty | 17 | 18.4 | 6 | 26 | 7 | 14.3 | 4 | 20.0 | 0.23 | 0.65 | 0.56 |
| ALIF | 39 | 42.3 | 7 | 30.4 | 27 | 55.1 | 5 | 25.0 | 0.18 | 0.70 | 0.13 |
| TLIF | 54 | 58.6 | 17 | 73.9 | 26 | 53 | 11 | 55.0 | 0.11 | 0.25 | 0.89 |
| Operation time (min) | 341.1 ± 87.6 | 347.1 ± 102.7 | 361.1 ± 77.9 | 296.9 ± 78.9 | 0.57 | 0.10 | < 0.01 | ||||
| Intraoperative blood loss (ml) | 1567.3 ± 1098.4 | 1884.0 ± 1444.4 | 1602.7 ± 1065.3 | 1178.0 ± 580.3 | 0.39 | 0.05 | 0.10 | ||||
| CATS blood (ml) | 344.9 ± 355.6 | 577.4 ± 522.7 | 353.5 ± 326.7 | 313.2 ± 235.8 | 0.97 | 0.72 | 0.62 | ||||
| Perioperative | |||||||||||
| RBC | 3.3 ± 5.5 | 5.6 ± 7.2 | 3.2 ± 5.3 | 0.9 ± 1.1 | 0.12 | < 0.05 | 0.06 | ||||
| FFP | 2.5 ± 4.7 | 4.4 ± 6.6 | 2.2 ± 4.2 | 1.1 ± 1.5 | 0.10 | < 0.05 | 0.24 | ||||
Abbreviations: ALIF and TLIF anterior and transforaminal lumbar interbody fusion, RBC red blood cell packs, FFP fresh frozen plasma units, CATS-blood continuous autotransfusion system blood. Statistical analyses regarding p-values were performed between the three columns/groups, i.e. early complications (2), late complications (3) and no complications (4); see superscripted numbers (significance at p < 0.05 or at p < 0.01)