1) Routine angiography is currently controversial for all traumatic knee dislocations, with some arguing it should be performed on all cases while others argue it is only necessary for cases with abnormal physical exam findings. 2) Studies have found that knee dislocations are associated with popliteal artery injuries in 21-81% of cases. Even when pulses are normal after reduction, complete arterial occlusion can occur within 6-24 hours in some cases. 3) The literature suggests that knee dislocations with apparently normal pulses after reduction are still associated with 12-28% risk of popliteal artery injury, so angiography for all cases is recommended to avoid missed injuries requiring amputation.