This video demonstrates how to test for trace amounts of blood in the patients stool. Trace amounts of blood in the stool can be sign of a number of problems, colon cancer being the most worrisome.
This free video was produced by the US Navy as training for medical personnel in isolated settings. It was included on the Operational Obstetrics & Gynecology CD. It may be freely downloaded.
http://www.operationalmedicine.org/ed2/Video/testing_for_occult_blood.htm
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