Iron Monitoring and Management in Hemodialysis Patients
Introduction to Iron Management
- The American Journal of Kidney Diseases recommends regular intravenous iron supplementation to maintain adequate hemoglobin levels (11-12 g/dL) in hemodialysis patients, with monitoring of transferrin saturation (TSAT) and serum ferritin at least every 3 months during maintenance therapy 1
Iron Status Monitoring Schedule
- The National Kidney Foundation suggests monthly monitoring of TSAT and serum ferritin when increasing erythropoietin dose in patients not receiving IV iron 2
- The American Journal of Kidney Diseases recommends monitoring every 3 months minimum for patients receiving regular IV iron until target hemoglobin is reached 1, 2
Target Iron Parameters
- The American Journal of Kidney Diseases recommends initiating IV iron when TSAT <20% and/or serum ferritin <100 ng/mL 1, 2, 3, 4
- The American Journal of Kidney Diseases suggests withholding IV iron when TSAT >50% and/or ferritin >800 ng/mL 1, 2, 3, 4
IV Iron Administration Protocols
- The American Journal of Kidney Diseases recommends administering 100-125 mg IV iron at every hemodialysis session for 8-10 consecutive doses during the initial repletion phase 1, 2, 3, 4
- The American Journal of Kidney Diseases suggests administering 25-125 mg IV iron weekly during the maintenance phase 1, 2, 4
Oral Iron: Limited Role
- The American Journal of Kidney Diseases states that oral iron is generally inadequate for hemodialysis patients 1, 2, 3, 4
- The American Journal of Kidney Diseases recommends using at least 200 mg elemental iron daily for adults if oral iron is attempted 1, 2, 3
Common Pitfalls and Caveats
- The American Journal of Kidney Diseases notes that functional iron deficiency may occur when patients have adequate total body iron stores but insufficient iron availability for erythropoiesis 6
- The American Journal of Kidney Diseases states that serum ferritin increases with inflammation, potentially masking true iron deficiency 5, 6