Push enteroscopy.

Push enteroscopy has superseded sonde enteroscopy principally because of its ability to provide therapy, as well as diagnosis. An overtube limits gastric looping and allows deeper jejunal insertion. A working channel allows therapeutic intervention. The technique is increasingly used to the diagnosis and treatment of small intestinal disorders, particularly in obscure gastrointestinal bleeding. The wider acceptance of push enteroscopy into routing practice requires further clinical effectiveness data.