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Anemia

Anemia. CBC, retic count. Retics normal or increased. Hypoproliferative. Hypoproliferative. Marrow damage > Infiltration; fibrosis > Aplasia > Myelodysplasia > Drug or radiation injury Iron deficiency B12 deficiency Folate deficiency Stimulus > Inflammation

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Anemia

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  1. Anemia CBC, retic count Retics normal or increased Hypoproliferative

  2. Hypoproliferative Marrow damage > Infiltration; fibrosis > Aplasia > Myelodysplasia > Drug or radiation injury Iron deficiency B12 deficiency Folate deficiency Stimulus > Inflammation > Endocrine defect > Renal disease Hypersplenism Clues from morphology microcytic, normocytic, or macrocytic poikilocytosis anisocytosis nucleated red cells target cells Howell-Jolly bodies hypersegmented polys

  3. Retics normal or increased Hemorrhage and Hemolysis Clues from morphology Blood loss Hemolysis > Antibody-mediated > Membrane defect > Metabolic defect > Red cell fragmentation Hemoglobinopathy microcytic, normocytic, or macrocytic red cell fragmentation red cell clumping nucleated red cells target cells

  4. IRF = immature reticulocyte fraction = immature retics / total retics HLR% = high light scatter retics = Retics% x IRF Foucade, Belaouni. Lab Hematol 1999; 5:153-8

  5. IRF and Anemia Foucade, Belaouni. Lab Hematol 1999; 5:153-8

  6. Direct anti-globulin test

  7. +++ ++ Fe Fe Regulation of iron absorption Gut lumen Heme Fe DMT1 Enterocyte Ferritin ++ +++ Fe Fe MTP1 Enterocyte precursor Plasma transferrin Transferrin Receptor HFE Hepcidin

  8. Iron stores Erythron iron

  9. Gastrointestinal absorption 1 mg/day Functional iron Blood, marrow, myoglobin 2 grams Storage iron Liver, RES 1 gram Plasma transferrin 2 mg Daily physiologic loss 1 mg

  10. Serum iron after oral iron in patients with iron deficiency 80 60 Serum iron 40 20 1 2 3 4 Hours WH Crosby, Arch Int Med; circa 1970

  11. Serum ferritin and total body iron Kaltwasser, Gottschalk. Kidney Int. 1999; 55(suppl): S49 - S56

  12. Serum transferrin receptor Storage iron = 107 mg Storage iron = 335 mg Storage iron = 1,102 mg Serial measurement of sTfr during phlebotomy in 3 individuals Goodnough, Skikne, Brugnara. Blood, 2000; 96: 823 - 833

  13. Ratio of serum transferrin receptor to ferritin as a measure of total body iron Cook, Flowers, Skikne. Blood 2003; 101: 3359 - 64

  14. Erythropoietin response in iron deficiency Spivak JL. Lancet 2000; 355:1707 - 12

  15. Serum erthyropoietin levels in patients with inflammatory bowel disease Controls = normal volunteers and patients with traumatic blood loss Schreiber, Howalt, et at. NEJM 1996; 334: 619 - 23

  16. IL-1 and anemia in patients with inflammatory bowel disease Schreiber, Howalt, et at. NEJM 1996; 334: 619 - 23

  17. Treatment with oral iron ± rEPO in patients with inflammatory bowel disease Schreiber, Howalt, et at. NEJM 1996; 334: 619 - 23

  18. Anemia of chronic disease Inflammation Tissue necrosis Infection Neoplasia Congestive heart failure Acute myocardial infarction

  19. Anemia of chronic disease Typical lab findings: Serum iron < 50 TIBC < 150 Normochromic or hypochromic red cells Normal ferritin Normal serum transferrin receptor

  20. Anemia of chronic disease Mechanisms: blunted erythropoietin response diminished response of erythroid precursors to erythropoietin decreased delivery of iron from RES, increased intracellular ferritin in macrophages decreased gastrointestinal iron absorption

  21. Anemia of chronic disease Mediators: IL-1 IL-6 g-interferon TNF-a

  22. Mortality and initial hematocrit in PRAISE Prospective randomized amlodipine survival evaluation 1130 patients 15 month follow-up Results adjusted using multivariant Cox model for age, gender, diabetes, smoking, heart failure etiology, EF, NYHA class, systolic BP, WBC, creatinine, and 18 additional factors Mozaffarian, Levy, et al. J Am Coll Cardiol 2003; 41(11): 1933 - 9

  23. Mortality and initial hematocrit in PRAISE Mozaffarian, Levy, et al. J Am Coll Cardiol 2003; 41(11): 1933 - 9

  24. Prospective, randomized study of erythropoietin and i.v. iron in patients with CHF Sq epo twice a week i.v. iron sucrose weekly 32 patients NYHA Class III or IV LVEF < 40% Hgb 10 - 11.5 Randomized Continue standard therapy Silverberg DS, Wexler D, et al. J Am Coll Cardiol 2001; 37: 1775 - 80

  25. Prospective, randomized study of erythropoietin and i.v. iron in patients with CHF epo and i.v. iron observation After 8 months: NYHA class LVEF Days in hospital Hgb Ferritin Creatinine + 48% + 5 % - 79% 10.3 12.9 221  366 1.7  1.7 - 11% - 5 % + 28% 10.9 10.8 264  283 1.4  1.8 Silverberg DS, Wexler D, et al. J Am Coll Cardiol 2001; 37: 1775 - 80

  26. Anemia of chronic disease In IBD study and in CHF study response to treatment was not predicted by: serum erythropoietin serum iron ferritin

  27. Effectiveness of treatment with erythropoietin Goodnough, Skikne, Brugnara. Blood, 2000; 96: 823 - 833

  28. Safety of intravenous iron Sodium ferric gluconate in sucrose (Ferrlecit) Available in Europe > 30 years 2.7 x 106 doses/year in Germany + Italy in 1995 Iron dextran (Imferon until 1992, InFed since 1992) 3 x 106 doses/year in US in 1996 Faich, Strobos. Am J Kidney Dis 1999: 33(3):464-70

  29. Safety of intravenous iron Reported severe adverse reactions (1976 - 1996): SFGS 3.3 severe allergic reactions/106 doses, no fatalities ID 8.7 severe allergic reactions/106 doses, 31 fatalities Faich, Strobos. Am J Kidney Dis 1999: 33(3):464-70

  30. Safety of intravenous iron Other theoretical risks: iron overload sepsis accleration of athersclerosis Faich, Strobos. Am J Kidney Dis 1999: 33(3):464-70

  31. Medicare warning :( Recombinant human erythropoietin is approved only for treatment of anemia caused by renal failure or by cancer treatment and for certain hematologic malignancies. Sodium ferric gluconate in sucrose is approved only for treatment of anemia in patients on hemodialysis and for patients who have had a severe reaction to iron dextran.

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