How do we approach investigating a patient with ACTIVE LGIB?,”First, r/o hemorrhoids and UGIBBleeding > 2 mL/min (1 unit RBC/4hrs)1. Angiography (very specific, can treat with pressors and gel foams on the spotBleeding < 0.5mL/min1. Wait for bleeding to stop, then colonoscopy (very specific)Bleeding in between1. Tagged RBC scan (sensitive, 0.1 mL/min, but must be actively bleeding) followed by angiogramColonic sources ruled out1. Capsule endoscopy”