Lower gastrointestinal bleeding

摘要

Lower intestinal bleeding covers a spectrum of intestinal bleeding originating distal to the ligament of Treitz. In 11 of cases, the source of bleeding will be found in the upper gastrointestinal tract. Lower intestinal bleeding can occur either in the form of fresh blood, also known as haematochezia, or in the form of black, tarry and foul-smelling stools, also known as melaena. It can be chronic and mild or severe and life-threatening. This article will focus on the common causes of lower intestinal bleeding, clinical presentation, assessment and management, as well as providing guidance for referral to secondary care.