The Comparative Study Between Bowel Preparation Method

The Comparative Study Between Bowel Preparation Method: 4L-split Dose of PEG Solution, Low-volume PEG Plus Ascorbic Acid Focusing on the Bowel Cleansing Efficacy, Patients' Affinity to Preparation Solution and Mucosal Injury

The purpose of this study is to compare the efficacy, acceptability and preparation-induced mucosal inflammation of PEG + ascorbic acid vs. PEG for colonoscopy.

This was a prospective randomized single-blinded clinical trial of ambulatory patients to assess the efficacy of bowel preparation and preparation-induced mucosal inflammation.

Endoscopists who were blinded to the preparation taken, assessed both bowel cleansing by using the Ottawa bowel preparation assessment tool and preparation-induced mucosal inflammation. Acceptability was assessed by questionnaire.

Inclusion Criteria:

• Patients who want colonoscopy purposing screening among adults between the age of 20~65

Exclusion Criteria:

• Under the age of 20, older than 65, pregnant or lactating women, intestinal obstruction, structural intestinal disease, hypothyroidism, gastrointestinal motility, renal failure, congestive heart failure, liver failure, electrolyte abnormalities, who refused research informed consent, inflammatory bowel disease, the obvious symptoms of the disease in patients with lower gastrointestinal (bloody stools, diarrhea, etc.)