Abstract
Insufflation, which is requisite for colonoscopy, generally uses air today. However, air insufflation during colonoscopy often causes abdominal bloat. Therefore, we used carbon dioxide (CO2) instead of air insufflation during colonoscopy for screening of a total of 101 patients. We examined their previous history, their degree of discomfort, and running costs. They underwent CO2 insufflation during colonoscopy at the Inui Clinic of Internal Medicine during Sep.10-Dec. 1, 2009. Their answers to a seven -item questionnaire were analyzed from the viewpoint of their feelings of discomfort. Moreover, running costs were calculated considering the amount of CO2. The results can be summarized as follows. First, almost all the patients answered that CO2 insufflation eased abdominal bloat both during and after colonoscopy. Secondly, their answers did not change according to their prior history of colonoscopy, abdominal surgery, or endoscopist. Thirdly, running costs for CO2 insufflation were only 277 yen/examination. A colonoscopy using CO2 insufflation can be performed safely without discomfort, irrespective of prior abdominal surgery. In conclusion, it is suggested that CO2 insufflation should be introduced as a promising and an economical method for colonoscopy.
