Optimization of Epoetin Therapy with Intravenous Iron Therapy in Hemodialysis Patients

来源 :2013年中国肾性贫血治疗专家共识研讨会 | 被引量 : 0次 | 上传用户:hujun5100
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  Iron deficiency limits the efficacy of recombinant human erythropoietin (rhEPO) therapy in end-stage renal disease (ESRD)patients.Functional iron deficiency occurs with serum ferritin >500 ng/ml and/or transferrin saturation (TSAT) of 20 to 30%.This study examines the effects of a maintenance intravenous iron dextran (ivID) protocol that increased TSAT in ESRD hemodialysis patients from conventional levels of 20 to 30% (control group) to those of 30 to 50% (study group) for a period of 6 mo.Forty-two patients receiving chronic hemodialysis completed a 16-to 20-wk run-in period, during which maintenance ivlD and rhEPO were administered in amounts to achieve average TSAT of 20 to 30% and baseline levels of hemoglobin of 9.5 to 12.0 g/dl.After the run-in period, 19 patients randomized to the control group received ivID doses of 25 to 150 mg/wk for 6 mo.Twentythree patients randomized to the study group received four to six loading doses of ivID, 100 mg each, over a 2-wk period to achieve a TSAT >30% followed by 25 to 150 mg weekly to maintain TSAT between 30 and 50% for 6 mo.Both regimens were effective in maintaining targeted hemoglobin levels.Fifteen patients in the control group and 17 patients in the study group finished the study in which the primary outcome parameter by intention to treat analysis was the rhEPO dose needed to maintain prestudy hemoglobin levels.Maintenance ivID requirements in the study group increased from 176 to 501 mg/mo and were associated with a progressive increase in serum ferritin to 658 ng/ml.Epoetin dose requirements for the study group decreased by the third month and remained 40% lower than for the control group, resulting in an overall cost savings in managing the anemia.Secondary indicators of irondeficient erythropoiesis were also assessed.Zinc protoporphyrin did not change in either group.Reticuloeyte hemoglobin content increased only in the study group from 28.5 to 30.1 pg.It is concluded that maintenance of TSAT between 30 and 50% reduces rhEPO requirements significantly over a 6-mo period.
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