| Mean | n | % | SD | 95% CI | |
Age (years) | 36 |
|
| 6.25 | 35.59 | 36.59 |
BMI | 28.49 |
|
| 4.31 | 28.14 | 28.83 |
Gender |
|
|
|
|
|
|
Male |
| 2 | 0.3% |
|
|
|
Female |
| 598 | 99.7% |
|
|
|
Position |
|
|
|
|
|
|
Lateral |
| 583 | 97% |
|
|
|
Sitting |
| 17 | 3% |
|
|
|
Procedure |
|
|
|
|
|
|
Cesarean section |
| 489 | 81.5% |
|
|
|
Labor analgesia |
| 2 | 0.33% |
|
|
|
Gynecological surgery |
| 7 | 1.2% |
|
|
|
Blood patch |
| 9 | 1.5% |
|
|
|
Thoracic block |
| 29 | 5% |
|
|
|
Procedural time (sec) | 50.33 |
|
| 47.03 | 46.54 | 54.11 |
Total volume used (ml) | 0.71 |
|
| 0.78 | 0.65 | 0.77 |
Epidural space pressure (mmHg) | 16.48 |
|
| 8.00 | 15.82 | 17.12 |
Attempts |
|
|
|
|
|
|
1 |
| 548 | 91.3% |
|
|
|
2 |
| 42 | 7% |
|
|
|
>2 |
| 10 | 1.7% |
|
|
|
Needle redirection |
|
|
|
|
|
|
0 |
| 390 | 65% |
|
|
|
1 |
| 151 | 25.2% |
|
|
|
>1 |
| 59 | 9.8% |
|
|
|
False positive LOR |
|
|
|
|
|
|
0 |
| 333 | 55.5% |
|
|
|
1 |
| 186 | 31% |
|
|
|
2 |
| 81 | 13.5% |
|
|
|
Epidural block efficacy |
|
|
|
|
|
|
Effective |
| 600 | 100% |
|
|
|
Ineffective |
| 0 | 0% |
|
|
|
Operator agreement |
|
|
|
|
|
|
No |
| 28 | 5% |
|
|
|
Yes |
| 571 | 95% |
|
|
|
Accidental dural puncture |
| 0 | 0% |
|
|
|