A newly developed fine-caliber endoscope for peroral cholangiopancreatoscopy
1994
: We have developed a new fine-caliber (2.09 mm outer diameter) endoscope for peroral cholangiopancreatoscopy. The endoscope contains one image transmission fiber, 12 light guide fibers (the transmitter of light from the light source) and a working channel (a lumen for the guide wire and rinsing). The working channel, whose bore is 0.72 mm, is located centrally within the endoscope. The endoscope can be introduced reliably into the bile and pancreatic ducts using the same techniques as those for endoscopic nasobiliary drainage through the instrumental channel of a duodenoscope for examination without pretreatment of the papilla of Vater. Two patients with lesions of the pancreatic duct and seven patients with lesions of the bile duct suspected or detected by endoscopic retrograde cholangiopancreatography (ERCP) were examined. Direct inspection of the biliopancreatic duct not only provided enough information to make a definite diagnosis, but also revealed lesions that were not detectable by ERCP or other examinations.
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