Table 2 Characteristics of the operations
Parameter | Unit | N | % | Minimum | Maximum | Mean | Standard deviation | Median |
|---|---|---|---|---|---|---|---|---|
ASA score | 1 | 4 | 2.73 | 0.69 | 3 | |||
Day of hospitalization | day | 22 | 1 | 21 | 6.86 | 5.75 | 4.5 | |
Time of operation | minutes | 25 | 1320 | 339 | 288 | 325 | ||
Biopsy before | pts | 13% (3) | ||||||
Transoral operation | pts | 22 | 31% (7) | |||||
Transoral and posterior | pts | 68% (15) | ||||||
Consecutive | pts | 14 | ||||||
Biopsy only | pts | 0% (0) | ||||||
Odontoid resection | pts | 22 | 72% (16) | |||||
Extensive approach | pts | 27% (6) | ||||||
Posterior approach | pts | |||||||
Graft only | pts | 6% (1) | ||||||
C1-C2 Magerl, Gallie | pts | 15 | 26% (4) | |||||
C1-C2 Harms | pts | 20% (3) | ||||||
Occipito-cervial fusion | pts | 46% (7) | ||||||
Graft | ||||||||
Without | pts | 13% (2) | ||||||
Bone substitute | pts | 15 | 6% (1) | |||||
Autologous free | pts | 33% (5) | ||||||
Autologous fix | pts | 46% (7) | ||||||
Drainage Posterior | pts | 100% (15) | ||||||
Suction drainage | pts | 14 | ||||||
number | 15 | 1 | 2 | 1.50 | 0.50 | 1.50 | ||
day | 2 | 3 | 2.14 | 0.35 | 2.00 | |||
Gravity drainage | pts | 2 | ||||||
Blood loss | ml | 22 | 50 | 4000 | 1305 | 1333 | 800 | |
Transfusions | pts | 31% (7) | ||||||