title: Clinical evaluation of the peroral cholangioscopy using a new videoscope.
abstract: Peroral cholangioscopy (PCS) has been performed in 22 cases using XCHF-B200 (Olympus Optical Co.) since June 1995 and in 77 cases using CHF-B20 (Olympus Optical Co.) after EST from Jan. 1989. XCHF-B200 has a longer rigid portion of distal end and a smaller channel diameter than CHF-B20. The successful rate of PCS using XCHF-B200 (82%) was lower than that of CHF-B20 (89%). The vascular pattern and fine vertical groove of the bile duct mucosa were shown more clearly on the photographs obtained with XCHF-B200 than those obtained with CHF-B20. However, not enough biopsy specimens could be obtained because the channel diameter of XCHF-B200 was rather small.If the length of rigid portion and biopsy channel of XCHF-B200 are improved, PCS using XCHF-B200 will be more useful for the diagnosis of bile duct disorders.
authors.affiliation: Third Department of Internal Medicine Division of Digestive Endoscopy Ohashi Hospital Toho University School of Medicine, 2-17-6 Ohashi, Meguro-ku Tokyo Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Igarashi
authors.forename: T
authors.initials: T
authors.lastname: Ukita
authors.forename: H
authors.initials: H
authors.lastname: Inoue
authors.forename: J
authors.initials: J
authors.lastname: Ishiguro
authors.forename: S
authors.initials: S
authors.lastname: Ogawa
authors.forename: M
authors.initials: M
authors.lastname: Satou
authors.forename: I
authors.initials: I
authors.lastname: Maetani
authors.forename: Y
authors.initials: Y
authors.lastname: Sakai