title: Use of a double-channel duodenoscope for diagnostic and therapeutic ERCP.
abstract: BACKGROUND
  A double-channel duodenoscope has the potential to shorten ERCP procedure time or improve procedure success rates because tasks can be done in parallel through variably situated accessory channels.
  
  
  METHODS
  We prospectively evaluated a prototype double-channel duodenoscope in 102 patients, recording findings, procedural success, and potential advantages or problems associated with the instrument.
  
  
  RESULTS
  Both channels were used in 79 cases (77%) and a single-channel in the remainder. Ninety-nine percent (101 of 102) of diagnostic and 95% (87 of 92) of therapeutic ERCPs were successful. Instrument advantages included decreased procedure time (23%), cannulation/procedural ease (16%), and miscellaneous (6%). Disadvantages were noted in 15% of the patients and were related to instrument diameter and diameter of the accessory channels.
  
  
  CONCLUSIONS
  Additional study of second generation dual-channel duodenoscopes appears warranted.
authors.affiliation: Section of Gastroenterology, Virginia Mason Medical Center, Seattle, Washington 98111, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Kozarek
authors.forename: S L
authors.initials: SL
authors.lastname: Raltz
mesh_terms: D001649:Bile Duct Diseases / Q000175:diagnosis / Q000628:therapy*; D002760:Cholangiopancreatography, Endoscopic Retrograde / Q000295:instrumentation*; D020698:Duodenoscopes; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010182:Pancreatic Diseases / Q000175:diagnosis / Q000628:therapy*; D011446:Prospective Studies