Withdrawal time in excellent or very poor bowel preparation qualities

Table 1 Criteria used to classify bowel preparation quality

Bowel preparation quality	Criteria
Excellent	Mucosal detail clearly visible without washing (suctioning of liquid allowed
Good	Minimal turbid fluid in colonic segments and entire mucosa well seen after cleaning
Fair	There is minor residual material in the colonic segments. Necessary to suction liquid to adequately view the colonic segments
Poor	Necessary to wash and suction to obtain a reasonable view. Portion of mucosa in colonic segments seen after cleaning but up to 15% of the mucosa not seen because of retained material
Unsatisfactory	Solid stool not cleared with washing and suctioning. More than 15% of the mucosa not seen