Graphs showing the total solute clearance among CAPD patients as measured by weekly Kt/V and creatinine clearance

Total solute clearance over time, as measured by weekly Kt/V (top panel) and CCr (lower panel), in patients on continuous peritoneal dialysis. Although peritoneal clearance (middle columns) remains constant, total clearance (left columns) falls because of a progressive loss in RRF (right columns).