Abstract
We reported our experience of using 4 types of wide-viewing duodenofiberscope with different angle and direction of view field: type A, 75°, side viewing; type B, 75°, 10° ret-rograde; type C, 95°, 5° retrograde; type D, 105°, side viewing. Each scope was the desirable one for upper GI endoscopy allowing better viewing and operation than the former duodenofiberscope, type JF-B3. Precise manipulation on cannulation or biopsy was rather troublesome with very wide-viewing scope, (e. g. type C or D), because working distance was too far. Therefore, the desirable scope for ERCP might be the one with 75° to 80° of viewing angle. Regarding the direction of view field, a side-viewing scope was convenient for FRCP. But, if available, the retrograde-viewing scope could be used on ERC with good results. There were no apparent differences in the rate of cannulation among 4 types of scope on ERCP. However, it was better than that reported previously from our institution.
