title: Use of a pediatric colonoscope improves the success of total colonoscopy in selected adult patients.
abstract: BACKGROUND
  Colonoscopy using a standard adult colonoscope can be difficult or impossible when there is a fixed, angulated sigmoid colon or stricture. It is sometimes possible to traverse such segments using a smaller-diameter, more flexible pediatric colonoscope.
  
  
  METHODS
  For this prospective study, one endoscopist started 645 consecutive, elective colonoscopies with a standard adult Olympus CF-100L colonoscope (52% women, 48% men). There were 36 examinations (5.6%) in which the adult colonoscope could not be passed through a fixed, angulated sigmoid colon (n = 34) or a sigmoid colonic stricture (n = 2). In such instances (33 women and 3 men), the endoscopist switched to a pediatric colonoscope.
  
  
  RESULTS
  The pediatric colonoscope successfully reached the cecum in 21 of the 36 cases (58.3%). The figure was 38.5% for the older Olympus CF-P20L fiberoptic colonoscope (n = 13) and 69.6% for the newer Olympus PCF-100 videocolonoscope (n = 23). Concomitant conditions in the 34 patients in whom the pediatric colonoscope was used because of a fixed, angulated sigmoid included previous pelvic surgery in 22, pelvic radiation therapy in 2, pelvic endometriosis in 3, and two with previous sigmoid diverticulitis.
  
  
  CONCLUSIONS
  The pediatric colonoscope, and particularly the newer Olympus PCF-100 colonoscope, is very useful in adult patients in whom it is not possible to traverse a fixed, angulated sigmoid colon or stricture using the standard adult colonoscope. This is predominantly a problem of female patients. Previous pelvic surgery may be an important causative factor in this regard.
authors.affiliation: Division of Gastroenterology, University of Missouri Hospital and Clinics, Columbia, USA.
authors.forename: J B
authors.initials: JB
authors.lastname: Marshall
mesh_terms: D003106:Colon / Q000473:pathology; D012809:Colon, Sigmoid / Q000473:pathology; D003108:Colonic Diseases / Q000175:diagnosis*; D020685:Colonoscopes; D003251:Constriction, Pathologic / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012810:Sigmoid Diseases / Q000175:diagnosis*; D020694:Sigmoidoscopes