Abstract
We report on 53 endoscopic investigations (in 43 cases for gastroduodenoscopy and 10 cases for colonoscopy), using a new type of electronic endoscope which has no glassf fiber bundle for imaging. Findings of these examinations were shown in Table 2 and Table 3. This system is composed of 3 devices (Figure 1). Pictures of digestive tract are caught by image sensor at the distal tip of the endoscope, then transported to the processor in which the signals are transformed to be visualized, and finally displayed on TV monitor. Characteristics of the three types of the scopes were shown in Table 1. To evaluate the maneuverability of the gastroduodenoscope, the mucosal surface of the stomach and duodenal bulbus was divided into 25 areas and the easiness of visualization in each area was investigated. As the results shown in Table 4, some problems were noticed to manipulate this scope, especially to observe the cardia and the anterior wall of upper gastric body. In case of total colonoscopy, the caecum was able to be observed in half of 6 patients. However, 2 of the 6 patients had marked intestinal adhesion from previous surgical treatments, and these patients were thought to be impossible to observe the caecum using recent f iberscope. Therefore, ultimate insertion ratio into the caecum became 75% except for these 2 cases. The quality of the television images of the upper and lower digestive tracts was excellent. Pictures obtained in this study were shown in Figure 2 to Figure 7. Furthermore, as many people can observe pictures of digestive tracts through the examination at the same time by TV monitor, this videoendoscope system was useful for teaching purpose. As the results, this endoscope system was thought to be acceptable for daily gastro-intestinal examination.
