Kenjiro Yasuda

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BACKGROUND After a pancreatic endocrine tumor has been diagnosed on the basis of clinical signs and the results of laboratory tests, localization of the tumor by the usual imaging procedures fails in as many as 40 to 60 percent of patients. Endoscopic ultrasonography, a sensitive test for small carcinomas of the pancreas, might also be useful in patients(More)
BACKGROUND Double-balloon enteroscopy (DBE) is a useful and epoch-making technique for small-bowel diseases. The single-balloon enteroscope (SBE) is a new instrument introduced by Olympus. OBJECTIVE To evaluate a prototype of the SBE. DESIGN A prospective case series. SETTING Kyoto Second Red Cross Hospital, between April 2006 and July 2007. (More)
BACKGROUND GI peristalsis during GI endoscopy commonly requires intravenous or intramuscular injection of antispasmodic agents, which sometimes cause unexpected adverse reactions. OBJECTIVE Our ultimate goal was to evaluate whether the antiperistaltic effect of L-menthol-based preparations facilitates endoscopic examinations in a clinical setting. (More)
The detection of early gastric cancer is performed by endoscopic study with or without the dye-spraying method, which is useful in detecting small lesions or surface lesions. For the diagnosis of early gastric malignancy, magnification endoscopy, narrow-band imaging and optical coherence tomography are used for histological diagnosis and research. On the(More)
BACKGROUND & AIMS We evaluated the diagnostic ability of a newly developed peroral video cholangioscopy (PVCS) in patients with pancreaticobiliary disorders. METHODS We retrospectively evaluated data from 144 patients with pancreaticobiliary disorders, collected from 5 tertiary referral centers. Endoscopic sphincterotomy (EST) or endoscopic papillary(More)
AIM Peppermint oil solution was found to be effective for reducing gastric spasm during upper gastrointestinal endoscopy. The aim of the present study was to assess whether the gastric peristalsis-suppressing effect is dose-dependently induced by L-menthol, the major constituent of peppermint oil, and to determine the recommended dose of an L-menthol(More)