Efficacy of Split-dose of Oral MMS for Bowel Preparation in Elderly Patients

Adequate bowel preparation is critical for successful colonoscopy and a large volume of PEG was required for bowel preparation in patients undergoing colonoscopy. The investigators conducted a a prospective, randomized, controlled study to compare low dose of oral magnesium sulfate solution with high dose PEG. The investigators found that patients who took low dose of oral magnesium sulfate solution had similar bowel preparation quality to patients who took PEG,but accompanied with fewer adverse events and better tolerance.