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Colonoscopy in the sitting position: lessons learned from self-colonoscopy by using a small-caliber, variable-stiffness colonoscope

      Colonoscopy is typically done in the supine position, with the patient's position varied as needed to assist instrument insertion. We found that a newly developed, small-caliber, variable-stiffness colonoscope (PCF-P240AI; Olympus Optical Co, Ltd, Tokyo, Japan), designed for colonoscopy in pediatric patients, was especially useful in patients with difficult colonoscopy.
      • Horiuchi A.
      • Nakayama Y.
      • Kajiyama M.
      • et al.
      Usefulness of a small-caliber, variable-stiffness colonoscope as a backup in patients with difficult or incomplete colonoscopy.
      The outside diameter is 10.3 mm, and the working length, the field of view, and the range of the tip flexion are similar to those of standard colonoscopes. The characteristics of the endoscope appeared to be such that it might enable an endoscopist to perform self-colonoscopy screening, which could be a valuable research tool, (eg, to repetitively study the effects of drugs or therapies).
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      Reference

        • Horiuchi A.
        • Nakayama Y.
        • Kajiyama M.
        • et al.
        Usefulness of a small-caliber, variable-stiffness colonoscope as a backup in patients with difficult or incomplete colonoscopy.
        Am J Gastroenterol. 2004; 99: 1936-1940