ENDOSCOPIC OBSERVATION OF THE DUODENAL BULB WITH A TRANSPARENT HOOD

Abstract

We observed duodenal ulcers using the transparent hood devised as a treatment instrument in endoscopic surgery. With 365 pictures of 100 cases of duodenal ulcers without the transparent hood and 112 pictures of 25 cases of duodenal ulcers observed with the attachment of the transparent hood, a review and comparison were made on how the lesion was properly and clearly observed. Among pictures of duodenal ulcers as a whole, the rate of pictures that displayed ulcers adequately was 70.5% in the group with the transparent hood. Thus, the rate was significantly high (p <0.01) as compared with the rate of 54.0% in the group without the transparent hood. Furthermore, the rate of the clear pictures of the image was significant-ly high (p <0.05%) in the group with the transparent hood. Particularly, the ulcers just beyond the pyloric channel had a higher detection rate, and the observant ability and the degree of a clearness in this portion were increased markedly. By using the transparent hood, it was possible to keep a constant distance between a lesion and the tip of the scope. Therefore, we could obtain clear visual fields even for a deformed and narrowed duodenal bulb, and we could easily insert the scope into the descending part of the duodenum.