| Technique | Safe | Unsafe | p value |
| Guided blunt dissection | 27 | 5 (16%) | - |
| Blunt surgical dissection | 29 | 3 (9.4%) | 0.71 |
| Thal-Quick Seldinger | 2 | 30 (93.75%) | <0.0001 |
| Rocket Seldinger | 10 | 22 (68.75%) | <0.0001 |