Bisacodyl Oral for Lowering Dysfunction (of Tenckhoff Catheter)

Doctors need to insert catheter for patients who are going to have peritoneal dialysis. These peritoneal catheters can be obstructed or blocked afterward. The chance of not having smooth flow can be up to 12 and 31%. So far, constipation is one of the proposed reasons. Therefore, the study is aimed to investigate whether the preventive use of laxative before the surgery can help better improve the function of the catheter and hence better flow.

Inclusion Criteria: * aged 18 or older and need of peritoneal dialysis * willingness to give written consent and comply with the study protocol Exclusion Criteria: * known contraindication to peritoneal dialysis * ongoing diarrhoea or active inflammatory bowel disease * participation in another interventional study within last 30 days of randomization * history of a psychological illness or condition that would interfere with the patient's ability to understand the requirement of the study and/or comply with the dialysis procedures