Table 1:
The delineation of the internal jugular and collateral vessels shown for both positions
| Volunteer | Supine |
Sitting |
||||||
|---|---|---|---|---|---|---|---|---|
| IJV | EJV | VP | NV | IJV | EJV | VP | NV | |
| 1 | + | + | – | + | – | + | + | + |
| 2 | + | + | – | – | – | + | + | + |
| 3 | + | + | + | + | – | – | + | + |
| 4 | + | – | + | + | + | + | + | – |
| 5 | + | + | + | – | + | – | + | + |
| 6 | + | + | – | + | (+) | – | + | + |
| 7 | + | – | + | + | + | – | + | + |
| 8 | + | + | – | – | + | – | – | + |
| 9 | + | + | – | – | (+) | – | + | – |
| 10 | + | + | – | + | + | + | + | + |
| 11 | + | + | – | + | + | – | – | + |
| 12 | + | + | – | – | (+) | – | + | – |
| 13 | + | + | + | – | (+) | – | + | + |
| 14 | + | + | – | – | (+) | – | + | + |
| 15 | + | + | – | – | (+) | – | + | + |
Note: + indicates vessel delineated; –, vessel not delineated; in parentheses, delineation of the IJV only on 1 side.