CBC
Chemistries
BUN may be elevated if bleeding occurs from site high in GI tract
Coags
LFTs
Type and screen
Fibrinogen
ECG (if concern for silent ischemia in patients likely to have CAD)
CTA
Requires brisk bleeding rate (0.5 cc/min) for detection[citation needed]
Tagged red blood cell scan
BUN may be elevated if bleeding occurs from site high in GI tract
Requires brisk bleeding rate (0.5 cc/min) for detection[citation needed]
Diverticulosis
Upper GI Bleeding
Ischemic colitis
Diverticular disease
Ulcerative colitis
Stercoral colitis
Diverticulitis
Anal fistula