Version July 2025
| Risk factor | Points |
| Known history of difficult IV access | 1 |
| Do you expect a failed first attempt or difficult IV access? | 1 |
| Unable to identify a dilated vein by palpating the upper extremity* | 1 |
| Unable to identify a vein by visualizing the upper extremity* | 1 |
| Does the largest dilated vein have a diameter <3 mm?* | 1 |
| A-DIVA score (total points) | Failed first attempt rate |
| 0 to 1 | 4% |
| 2 to 3 | 37% |
| 4 to 5 | 94% |
IV: intravenous.
* After tourniquet placement.