[Endoscopic Doppler ultrasonography in lower intestinal bleeding:vascular diagnosis and monitoring of therapy].

Endoscopic Doppler sonography is a relatively new method for evaluating the sources of intestinal bleeding. For the most part our experiences derived from cases of gastroduodenal ulcer bleedings, in which Doppler sonography permits the identification of arterial vessels relevant for recurrent ulcer bleedings as well as follow-up of therapy after sclerosing. In the lower intestinal tract endoscopic Doppler has, however, only rarely been used, e.g. for diagnosing vascular malformations. This method is of theoretical interest for evaluating colorectal sources of bleeding but is nonetheless of some practical importance, as our investigations of angiodysplasias, ulcers of the rectum and polyps demonstrate.