Continuous ambulatory peritoneal dialysis (CAPD) and hemodialysis (HD) both have advantages in the treatment of patients with renal failure. In CAPD, solute removal is sometimes insufficient in patients who have a relatively large muscle mass that produces high levels of creatinine. To compensate for this deficiency, frequent exchanges and large dialysate volumes are required. We previously reported that once-weekly HD helps CAPD patients who experience insufficient solute removal. In the present study, we followed, for more than 3 years, 9 CAPD patients who underwent additional weekly HD. Add-on HD therapy significantly increased the subjects' weekly peritoneal creatinine clearance to 45 +/- 3 L (mean +/- standard deviation); these values rose to more than 60 L over the course of the study. Our findings suggest that the combined use of CAPD and HD improves solute clearance in CAPD patients who are insufficiently dialyzed.
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