Usefulness of a wide-angle-viewing videoendoscope (XGIF-QW230) for observation of upper gastrointestinal tract

Abstract

We investigated the usefulness of a wide-angle-viewing videoendoscope for the examination of upper gastrointestinal tract. The instruments used for this study is Olympus XGIF-QW230 with a modified objective lens. It had the same specifications except the field of view, which is 140 degrees with the GIF-Q230 and 170 degrees with the XGIF-QW230. In vitro and in vivo examinations showed that it was possible to observe a wider area with the XGIF-QW230 than with GIF-Q230. Further the described distortion of the periphery did not disturb in vivo observation. It makes also observation of the superior duodenal angle and distal part of anastomosis easier. Therefore, we conclude that a videoendoscope XGIF-QW230 is useful for routine examination for upper gastrointestinal tract.