Gastrointestinal bleeding

What is it?

It may be the initial sign of digestive tract disorders in 30% of patients. Hematemesis is the vomiting of blood. The hemorrhage usually arises at a point proximal to the ligament of treitz, perhaps with a mane. Vomiting on a coffee seat suggests slower bleeding. Melena is the rectal expulsion of tarry dark blood. It can persist up to five days after the end of the hemorrhagic crisis that produces it, which in turn can be 50 ml. Fecal occult blood determinations can remain positive for three weeks. It is usually a consequence of bleeding in the upper digestive tract.

Consequence of gastrointestinal bleeding. In the acute form, hematocrit is usually an unreliable indicator of volume loss. Initially, vasovagal signs are noticed; Then, signs of hypovolemia, which is followed by shock and oliguria and anuria appear. Laboratory studies can detect hyperazoemia, especially with bleeding varicose veins, but not with bleeding from the colon.