Patient and CVF characteristics
| Characteristics | Overall (n = 48) |
|---|---|
| Age (mean) (SD) | 58.7 (11.9) |
| Sex | |
| Female | 29 (60.4%) |
| Male | 19 (39.6%) |
| CVF level | |
| Cervical | 1/48 (2.1%) |
| Thoracic | 45/48 (93.8%) |
| Lumbar | 2/48 (4.2%) |
| CVF side | |
| Right | 34/48 (70.8%) |
| Left | 14/48 (29.2%) |
| CVF visualization | |
| Better visualized early | 25/48 (52.1%) |
| Still partially visualized on delay | 21/25 (84.0%) |
| Better visualized late | 6/48 (12.5%) |
| Still partially visualized on early | 4/6 (67%) |
| Equally visualized early and late | 15/48 (31.3%) |