A two-center randomized controlled trial of water-aided colonoscopy versus air insufflation colonoscopy

Background and study aim: Water-aided colonoscopy includes water immersion and water exchange. Several small single-center studies have suggested that the use of water rather than air insufflation during colonoscopy reduces pain on insertion. The aim of this study was to investigate whether water-aided colonoscopy is less painful than air insufflation in a large cohort of patients. Patients and methods: This was a two-center,...