Table 2.
Intraoperative and postoperative findings of the patients.
| Overall ACDF | Single level ACDF | Multi-level ACDF | p-Value* | |
|---|---|---|---|---|
| Number | 200 | 118 | 82 | |
| Findings during operation | ||||
| Duration of surgery (min ± SD) | 162.5 ± 60 | 131.4 ± 33.8 | 207.1 ± 61.4 | <0.05 |
| Estimated blood loss (mL ± SD) | 205.6 ± 200 | 169.1 ± 174 | 258.2 ± 223 | <0.05 |
| Steroid Treatment during surgery | 25/200 | 7 | 18 | <0.05 |
| MBP < 60 mmHg | 3/200 | 0 | 3 | 0.07 |
| Transfusion during surgery | 3/200 | 1 | 2 | 0.57 |
| Findings during IONM | ||||
| Monitorability of MEPs on baseline | 177/200 | 103/118 | 74/82 | 0.65 |
| MEPs change during surgery | 12/177 | 3 | 9 | <0.05 |
| MEPs change at the end of surgery | 9/177 | 3 | 6 | 0.17 |
| Monitorability of SSEPs on baseline | 196/200 | 115/118 | 81/82 | 0.65 |
| SSEPs change during surgery | 2/196 | 0 | 2 | 0.17 |
| SSEPs change at the end of surgery | 2/196 | 0 | 2 | 0.17 |
| Postoperative findings | ||||
| Postoperative weakness | 6/200 | 2 | 4 | 0.23 |
| Revision due to hematoma | 2/200 | 1 | 1 | 0.65 |
ACDF = anterior cervical discectomy and fusion; MBP = mean blood pressure; IONM = intraoperative neurophysiologic monitoring; MEPs = motor evoked potentials; SSEPs = somatosensory evoked potentials.
*
p-Value between single-level ACDF and multi-level ACDF surgeries.