Bowel Preparation for elective Left-Sided Colonic Surgery

Study hypothesis: The objective of this study is to ascertain the best method of bowel preparation, prior to elective left-sided colonic surgery in terms of patient comfort and surgical efficacy. Sodium phosphate enemas (Colex) and bisacodyl (tablet and suppository) are to be compared. The occurrence of infections (wound, peritonitis) and anastomotic leaks will be monitored.
Null hypotheses are:
1. Patients in both groups experience pain and discomfort equally
2. The surgeon finds no difference in the condition of the left hemicolon intraoperatively
3. No difference in incidence of infection is found
4. No difference in incidence of anastomotic leaks is found
Primary outcome(s): Questionnaires will be used to assess the opinions of patients and surgeons. The parameters are recorded in a five point scale.