This clinical study is designed to evaluate the theoretical prediction of a lower glucose absorption in optimized automated peritoneal dialysis regimes. Patients will receive both a standard 6 x 2L 1.36% glucose regime or an optimized 7 x 2 L 2.27% glucose + 5 x 2 L 0.1% glucose regime in a crossover fashion.

Automated peritoneal dialysis (APD) is a rapidly growing, home-based kidney replacement therapy promoting patient autonomy, and is associated with lower societal costs compared to hemodialysis. However, in light of the growing number of diabetic patients on PD, the unwanted glucose absorption during APD is problematic. Recent results (Öberg CM, Rippe B, 2017, see references), using a theoretical model of APD, indicate that large reductions in glucose absorption are possible by using specialized so-called optimized bi-modal treatment regimes having "UF cycles" using a higher glucose concentration (e.g. 2.27% glucose) and "Clearance cycles" using a low glucose concentration (e.g. 0.1% glucose).

Inclusion Criteria:

• age between 18 and 75 years;
• duration of PD (automated peritoneal dialysis (APD) or continuous ambulatory peritoneal dialysis (CAPD)) >4 weeks

Exclusion Criteria:

• severe heart failure (New York Heart Association Functional Classification; NYHA III or IV);
• pregnancy;
• catheter malfunction or
• peritonitis within 3 months prior to the trial.