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Abstract
Mechanical bowel preparation (MBP) became a standard practice as a measure to decrease the high morbidity associated with colorectal surgery in the past. Infection and anastomotic failure were the two most feared complications following resection of the large bowel, and cleansing was thought to be essential to prevent them(Maria et al ., 2007). Over the last decade, several groups have shown no superiority of different cleansing protocols over colonic unpreparation for the prevention of either postoperative wound infection or anastomotic leakage (Bucher et al., 2005).Moreover, several meta-analyses reported that standard MBP was associated with an increased risk of anastomotic dehiscence. However; this latter finding was difficult to interpret (Wille et al., 200).5This work aims to compare between two groups of patients who will undergo colonic anastomosis for different indications, for the first group we will do colonic preparation before the operation and for the second group we will not.