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Figure 41-2

Suggested Algorithm for Pts with Acute Lower GI Bleeding !!flowchart!!

Suggested algorithm for pts with acute lower GI bleeding. *Some suggest colonoscopy for any degree of rectal bleeding in pts <40 years as well. ^If upper GI endoscopy reveals definite source, no further evaluation is needed. †If massive bleeding does not allow time for colonic lavage, proceed to angiography.