CLINICAL EVALUATION OF PROTOTYPE 2-CHANNELS ELECTRONIC VIDEOCOLONOSCOPE (CF-2T2001)

Abstract

A 2-channels electronic video-colonoscope (CF-2T200 I) has newly been developed by Olympus Co. for a better colonoscopic instrumentation. The scope has two instrument channels (left channel with 2.8mm and right channel with 3.7 mm in diameter respectively) which an ultrasonic probe with 3.4 mm in diameter can intubate easily. This new scope was applied 215 times of examination in 117 patients with colonic diseases (46 times for observation with biopsy, 30 times for endoscopic ultrasonography with an ultrasonic probe and 139 times for endoscopic electrosurgical resection). By using this instrument, total colonoscopy was successful in all of 92 attempted cases and endoscopic ultrasonography was successful in 30 cases without any trouble. Endoscopic polypectomy and mucosal resection were also easily manipulated by the combined use of a grasping forceps and a polypectomy snare that could pass through the both channels of the scope. Based on these results, we can evaluate that this new scope is considerably valuable as a colonoscopic instrumentation.