Background: Colonoscopy is considered one of the most significant screening and therapeutic modality for colorectal
cancer. Colonoscopy depends on pre-procedure bowel preparation unlike other screening tests as if patient undergone
poor bowel preparation, significant pathology may be missed. This study was aim to evaluate the effect of an
educational intervention on knowledge, satisfaction and quality of bowel preparation for patients scheduled for
colonoscopy. This study was conducted at Gastrointestinal Endoscopy unit at Cardiac and Gastrointestinal Center -
Domyata, Egypt. Quasi-experimental design was utilized in this study on a purposeful sample of (120) patients in the
previous mentioned setting. Two tools were used to collect the data. Tool I: Colonoscopy Patient assessment sheet, Tool
II: Quality of bowel preparation for colonoscopy Assessment. Result: It was found that majority of study group (90%)
had an excellent quality of bowel cleanliness as measured by Boston bowel scale post educational intervention compared
to control group (60%). Conclusion: Highly statistically significant improvement in total knowledge level related to
colonoscopy preparations, quality of bowel preparations and patient satisfaction. The study recommended that
availability of written visual information about proper colonoscopy bowel preparation facilitate patient's education and
improve quality of bowel cleanliness.