Intraperitoneal treatment with darbepoetin for children on peritoneal dialysis

To determine the efficacy and safety of intraperitoneal administration of darbepoetin in children with renal anemia on peritoneal dialysis, we conducted a single-arm, retrospective, two-centre study in which children were treated with intraperitoneal darbepoetin at the end of nightly intermittent peritoneal dialysis. Controls were those children treated with intraperitoneal erythropoietin six months before conversion to darbepoetin. Children were converted with the conversion factor 200 units erythropoietin = 1 μg darbepoetin. Children who started with darbepoetin, started with 0.45 μg/kg/week. Nineteen children entered the study. The mean age was 6.8 years. Eight children were converted from 201 U/kg/week intraperitoneal erythropoietin to 1.0 μg/kg/week intraperitoneal darbepoetin. They were treated for a median period of 31.5 months. Median darbepoetin dose for an adequate erythropoesis over this period was 0.79 μg/kg/week. All 19 children were treated with darbepoetin for a median period of 13.4 months. The median dose for an adequate erythropoesis over this period was 0.63 μg/kg/week. The peritonitis incidence during this study was once every 25.1 months. Three children developed hypertension; one child developed headache. These complications developed after a rapid increase of hemoglobin concentration. Intraperitoneal administration of darbepoetin is effective and safe for children on peritoneal dialysis.