Thursday, December 24, 2020

The three O's of GI bleeding : Overt, obscure, and occult

GI bleeding can be classified into three O's: Overt, obscure, and occult! Can you define these terms?

If not, I'll help you out

Overt GI bleeding is bleeding that is visible to the patient or physician. Examples include hematemesis, hematochezia, or melena.

Occult bleeding is bleeding that is not visible to the patient or physician. Occult GI bleed is suspected when a patient has a positive fecal occult blood test (FOBT) or iron deficiency anemia with or without a positive FOBT.

Obscure GI bleeding is bleeding in which the source is not apparent on upper endoscopy, colonoscopy, or small bowel radiography. Obscure bleeding may be either overt or occult. 


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