[Comparison of the ability to control anemia in patients on hemodialysis and peritoneal dialysis considering iron reserves and plasma erythropoietin].

It is known, that patients undergoing CAPD have less severe anaemia than those receiving hemodialysis (HD). In addition they require smaller doses of rHuEpo to control anaemia than HD pts. We have decided to compare plasma erythropoietin (pEpo) and iron reserves (IR) in these both groups of pts. 17 pts on CAPD and 50 pts on HD were diagnosed. 35% pts on CAPD and 52% pts on HD required permanent rHuEpo treatment to maintain hemoglobin (Hb) concentration above 9.5g/dl and Ht above 30%. Plasma EPO and ferritin levels were measured by enzymatic immunoassay. IR were estimated by formula: IR = 400x [ln (ferritin) - ln(50)]. Compared to CAPD, HD pts had higher IR (405 +/- 76 vs. 358 +/- 120 mg) but differences are not statistically significant. Plasma Epo level (geom. mean) was statistically significant higher p = 0.025 in HD pts compared to CAPD pts (8.68, range 2-53 vs. 5.21 range 2-15 mV/ml) Hb concentrations did not differ significantly between pts on CAPD and HD. CAPD pts controlled anaemia better than HD pts despite lower concentration of endogenous erythropoietin.