Abstract
In contrast to chronic or occult bleeding, acute lower gastrointestinal (GI) bleeding can be a confusing conundrum and a diagnostic dilemma. The difficulty is exacerbated by the severity and rapidity of the clinical problem, since by definition it involves instability of vital signs, anemia, and/or the need for blood transfusion (1). Unfortunately, the diagnostic and therapeutic approach to the patient with severe lower GI bleeding has not been well standardized. The clinician cannot rely on generally accepted guidelines, since there is a paucity of evidence-based recommendations. This uncertainty is an unavoidable fact that can be uncomfortable for the primary care physician and anxious patients or family who have unrealistic expectations that definitive diagnosis and treatment may be possible even in this situation. Many patients with unrevealing colonoscopy, radiology, and nuclear medicine scans are simply transfused, with the hope that their bleeding will stop spontaneously and not recur after discharge. Unfortunately, in about 20% of patients, bleeding recurs or continues. In many cases an empiric resection of some or the entire colon is done, but the mortality is high in these typically elderly patients. Many who survive such surgery continue bleeding, especially if only a partial resection is performed.
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Jacoby, R.F. (2003). Obscure Causes of Acute Lower Gastrointestinal Bleeding. In: Kim, K.E. (eds) Acute Gastrointestinal Bleeding. Clinical Gastroenterology. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-59259-299-9_12
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DOI: https://doi.org/10.1007/978-1-59259-299-9_12
Publisher Name: Humana Press, Totowa, NJ
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