Abstract
Introduction: In colonoscopy, carbon dioxide (CO2) insufflation is safe and effective in reducing patient discomfort, but air insufflation is still the standard method and there are no reports about its use during lengthy colonoscopic procedures. Some colonoscopists have performed endoscopic submucosal dissection (ESD) of large superficial colorectal lesions using air insuflation, but this usually causes severe abdominal discomfort. In addition, perforations, subcutaneous emphysema and pneumothorax have been reported in colorectal ESDs.
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