Several randomised studies have shown that the addition of low-dose Simethicone to the bowel preparation was sufficient to reduce the presence of bubbles during colonoscopy. The aim of this study was to evaluate the efficacy and safety of a bowel preparation containing low-dose Simethicone on bubble formation.

Patients and Methods This prospective, real-life, phase 4 study was conducted from February 2020 to May 2021, in five private endoscopy centres, among adult patients undergoing a colonoscopy. Clinical, endoscopic and histological parameters were collected on e-CRF. The primary endpoint was the measurement of bubble formation in the various colon segments.

Inclusion Criteria:

patients :

• scheduled for colonoscopy as part of CRC screening, using the bowel preparation with fixed low-dose of simethicone combined with Macrogol 4000 (PEG)
• aged 50-75 years,
• with no family history of CRC or personal history of colon polyps but with a positive Faecal Immunochemical Test (FIT), with a family history of CRC or personal history of colon polyps,
• requiring surveillance colonoscopy after 5 years if diagnosed with one or two tubular adenomas <10 mm in diameter (low-risk group) or after 3 years if diagnosed with at least 3 adenomas or any adenoma at least 10 mm in diameter or with high-grade dysplasia, according to French recommendations during the study inclusion period.

Exclusion Criteria:

-

All patients, scheduled for colonoscopy as part of CRC screening, were prospectively included according to the inclusion criteria