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Abstract
Objective. Diminishing ultrafiltration and dialysis adequacy may limit the long-term use of peritoneal dialysis (PD). Inflammation may play a role in changes in peritoneal function. This study was designed to evaluate alterations in peritoneal function and soluble factors in dialysate during a 1-year follow-up period. Material and methods. A personal dialysis capacity test was performed at the start of the study and after 6 and 12 months in 20 patients in order to determine dialysis adequacy and membrane characteristics. Dialysate was collected during the test days for analyses of interleukin-6 (IL-6), soluble intercellular adhesion molecule-1, hyaluronan and cancer antigen 125 (CA125). Results. There were no significant changes in dialysis adequacy or membrane characteristics during the 1-year follow-up period. The appearance rate of IL-6 in dialysate increased significantly (419.8±63.3 at the start, 784.1±136.4 after 6 months and 1149.3±252.2 ng/24 h after 12 months; p=0.006) during follow-up. Furthermore, the appearance rate of CA125 increased throughout the study in patients using icodextrin, but decreased slightly in patients using only conventional dialysis solutions. Conclusions. There were no major changes in dialysis adequacy or membrane characteristics during the follow-up period, but increased IL-6 in dialysate may reflect peritoneal inflammation, which may lead to long-term alterations in the peritoneal membrane. Icodextrin may have a preventive effect on the longevity of the peritoneal membrane.