Table 2 Comparison between the cases treated by C1 laminectomy and the cases treated by the C1/2 fixation
From: Retrospective analysis of surgical outcomes for atlantoaxial subluxation
Surgery type | C1 laminectomy | C1/2 fixation |
|---|---|---|
Case, no. | 11 | 19 |
RA, no. | 1 (9.1%) | 6 (31.6%) |
OA, no. | 8 (72.7%) | 12 (63.2%) |
Trauma, no. | 2 (18.2%) | 1 (5.3%) |
Age, average, years | 74.6 ± 6.8 | 68.0 ± 9.0† |
Sex, female/male, no. | 2/9 | 9/10 |
Operative time, average, min | 123.5 ± 54.9 | 186.6 ± 59.8† |
Blood loss, average, mL | 53.2 ± 69.2 | 184.7 ± 373.6 |
Ranawat value, average, mm | ||
Preoperative | 13.8 ± 3.2 | 14.2 ± 3.5 |
Postoperative | 13.1 ± 2.9 | 13.9 ± 2.6 |
CAA, average, degrees | ||
Preoperative | 154.3 ± 7.5 | 156.4 ± 7.4 |
Postoperative | 155.3 ± 5.9 | 160.3 ± 6.5† |
C1/2 angle, average, degrees | ||
Preoperative | 24.1 ± 10.8 | 17.5 ± 8.9 |
Postoperative | 25.4 ± 10.5 | 20.2 ± 8.3 |
ADI flexion/extension, average, mm | ||
Preoperative | 7.2 ± 2.4/5.0 ± 2.4 | 8.6 ± 2.8/4.0 ± 2.4 |
Postoperative | 8.2 ± 2.9/5.4 ± 2.9 | 3.9 ± 2.2/3.9 ± 2.2 |
ADI neutral, average, mm | ||
Preoperative | 6.1 ± 2.5 | 7.6 ± 2.9 |
Postoperative | 6.1 ± 3.2 | 3.9 ± 2.2*♰ |
C2–7 angles, average, degrees | ||
Preoperative | 10.5 ± 13.0 | 9.1 ± 14.2 |
Postoperative | 2.8 ± 13.9 | 3.8 ± 13.4 |
Cervical SVA, average, mm | ||
Preoperative | 40.6 ± 13.8 | 12.3 ± 14.4† |
Postoperative | 41.9 ± 20.7 | 17.5 ± 15.4† |
C-JOA score, average, points | ||
Preoperative | 8.5 ± 4.1 | 9.8 ± 3.8 |
Postoperative | 11.1 ± 4.2 | 13.1 ± 3.1* |
Recovery rate of C-JOA score, average, % | 39.4 ± 30.5 | 49.8 ± 38.0 |
Complications, no. | Hematoma = 1 AAF = 1 (18.2%) | Septic emboli = 1 SSI = 2 DSI = 1 VS = 1 AAF = 2 (36.8%) |
Revision, no. | 2 (18.2%) | 4 (21.1%) |