EBQ:Nasogastric aspiration and lavage in emergency department patients with hematochezia or melena without hematemesis

incomplete Journal Club Article
Palamidessi N. et al. "Nasogastric aspiration and lavage in emergency department patients with hematochezia or melena without hematemesis". Academic Emergency Medicine. 2010. 17(2):126-32.
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Clinical Question

Is nasogastric lavage and aspiration in the ED an effective test to distinguish between an upper versus lower source of GI bleed in patients who have either melena or hematochezia without hematemesis?

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