[Application of video endoscope system (EVIS200) in endourology]

We began clinical studies in April, 1989 for the purpose of utilizing the video endoscope system in the field of urology, termed the Urological Video Information System (UVIS). The UVIS is made up of an image assembling and recording system and an image filling system. Since we started using the first generation video endoscope system (EVIS-1, Olympus Optical Co.) as an image assembling system, we have encountered several major obstacles such as 1) the absolute insufficiency for the amount of light, and 2) the unclearness of frozen images. As we have been able to use as second generation video endoscope system (EVIS200, Olympus Optical Co.) since September 1990, the major components of the UVIS have been modified. In this report, we describe our clinical experience with the re-designed UVIS; EVIS200, which we have used, is composed of a video-processor (CL-200, Olympus Co.), a video converter and rigid urological scopes. The EVIS200 has been evaluated not only for the endoscopic examination but also for transurethral surgery. No problems were noticed in manipulating the EVIS200. Marked improvements were achieved in image quality. Images both on the television monitor and hard copies from the color video printer had optical quality in good agreement with the gross findings. The UVIS was a great contribution to both the authors and the patients; the findings both of the examination and the surgery could be explained to the patient and family during and/or immediately after the procedure. We believe that the UVIS may replace conventional urologic endoscopy and become an excellent date-base for endourology.