List eight factors that contribute to arterial thrombosis at the puncture site.

1. Catheter tip thrombosis (vessel stripped by the tip of the catheter as it is withdrawn, forming a nidus for thrombosis)
2. Multiple puncture attempts
3. Use of large catheter or sheath
4. Repeated catheter/guidewire exchanges
5. Hypotensive patient
6. Contrast reaction resulting in hypotension and stasis
7. Long procedure
8. Poor manual compression