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A Practical Approach to Anemia Dr.R.V.S.N.Sarma., M.D., M.Sc., (Canada) Consultant Physician & Chest Specialist Visit us at :

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Presentation on theme: "A Practical Approach to Anemia Dr.R.V.S.N.Sarma., M.D., M.Sc., (Canada) Consultant Physician & Chest Specialist Visit us at :"— Presentation transcript:

1 A Practical Approach to Anemia Dr.R.V.S.N.Sarma., M.D., M.Sc., (Canada) Consultant Physician & Chest Specialist Visit us at : How to efficiently and accurately work up an anemic patient ?

2 What is Anaemia ? Important to remember Anemia is a clinical sign of disease It is not a single disease by itself Need to look for the underlying cause ! Will we ignore a fever with out investigation ? Its diagnosis is not that simple !! We’ll make it Its very common and imp. in our practice Drug Rx. depends on the cause

3 Definition of Anaemia Decrease in the number of circulating red blood cell mass and there by O 2 carrying capacity Most common hematological disorder by far Almost always a secondary disorder As such, critical for all practitioners to know how to evaluate / determine its cause / treat

4 Erythron Erythron is the machinery of RBC production EPO, IL, Growth factors, Cytokines – stimulate it Hypoxia is strong stimulus for the Erythron Its functioning is influenced by 1.Normal renal production of EPO 2.A functioning Erythroid marrow 3.An adequate supply of substrates for Hb production

5 Let us meet the Grand Parents ! The RBC Lineage

6 Haemopoesis in Bone Marrow

7 Pro Erythroblast Large purple nucleus Thin rim of cytoplasm Basophilic in stain Cell > 35 µ

8 Early Normoblast Large purple nucleus Denser nucleus Thin rim of cytoplasm Basophilic in stain Cell > 25 µ

9 Intermediate Normoblast Medium sized nucleus Reticulated nucleus More cytoplasm Neutral in stain Cell > 20 µ

10 Late Normoblast Small dense nucleus Darkly staining Increased cytoplasm Pink in stain Cell > 15 µ

11 Reticulocyte No definite nucleus Reticulum of RNA Deep blue staining Light blue cytoplasm Cell size about 10 µ

12 Normal Red Cells

13 Normal Red Cells No nucleus, Enzyme packets Biconcave discs – Haem + Gl Center 1/3 pallor Pink cytoplasm (Hb filled) Cell size µ - capill. 2 µ EM pathway, HMP Negative charge – no phago Na less, K more inside days life span

14 The Factory – Bone Marrow Sternum, pelvis, vertebrae, long bones, skull bones, Tibia (paed) From stem cells (pleuripotent) 75% of marrow for WBC 25% of BM for Red cells Erythrod / Granulocyte Ratio 1:3 E:G ratio increased in Anaemia Large white areas are marrow fat

15 Normal BM High Power

16 Hemoglobin (Hb)

17 First Question The onset of Anaemia Acute versus chronic Clues –Hemodynamic stability –Previous CBC –Overt blood loss

18 Types of Anaemia

19 Screening Tests – Anaemia Clinical Signs and symptoms of Anaemia Look for bleeding – all possible sites Look for the causes for anemia Routine Hemoglobin examination Cut off marks for Hb – –US < 13.5 g WHO < 12.5 g –India Less than 12 g%

20 Clinical Signs to be looked for Skin / mucosal pallor, Skin dryness, palmar creases Bald tongue, Glossitis Mouth ulcers, Rectal exam Jaundice, Purpura Lymph adenopathy Hepato-splenomegaly Breathlessness Tachycardia, CHF Bleeding, Occult Blood

21 PCV or Hematocrit 57% Plasma 1% Buffy coat – WBC 42% Hct (PCV)

22 The Three Basic Measures MeasurementNormalRange A.RBC count 5 million 4 to 6 B.Hemoglobin15 g%12 to 17 C.Hematocrit45 38 to 50 A x 3 = B x 3 = C - This is the rule of thumb Check whether this holds good in given results If not -indicates micro or macrocytosis or hypochro.

23 The Three Derived Indicies MeasurementNormalRange A.RBC count 5 million 4 to 6 B.Hemoglobin15 g%12 to 17 C.Hematocrit45 38 to 50 MCV C ÷ A x 10=90 fl MCHB ÷ A x 10=30 pg MCHCB ÷ C x 100=33%

24 Causes of Anaemia 1.Decreased production of Red Cells - Hypo proliferative, marrow failure 2.Increased destruction of Red Cells - Hemolysis (decreased survival of RBC) 3.Loss of Red Cells due to bleeding - Acute / chronic blood loss (hemorrhagic) M = P x S ( L)

25 Hypoproliferative Anaemias Failure of cell maturation Nuclear breakdown Cytoplasmic breakdown Megaloblastic Anaemia Defective DNA synthesis Folate or B 12 deficiency Haem defect Globin defect Thalassemia Sickle cell A FePhorph IDA, SA

26 Anaemia – First Test RETICULOCYTE COUNT % Normal Less than 2% ‘RBC to be’ or Apprentice RBC Fragments of nuclear material RNA strands which stain blue

27 Reticulocytes Leishman’sSupravital

28 Reticulocyte Production Index For example the RPI is calculated as follows Reticulocyte count9% Hb content7.5 g% 1.Correction for Anaemia = 9 x (7.5 ÷ 15) = 9 x 0.5 = 4.5 % 2.Correction for increased life span 4.5 ÷ 2 = 2.25 % 3.Thus, the RPI is 2.25

29 Anaemia Hypoproliferative Hemolytic RPI < 2RPI > 2 Hb% < 12, Hct < 38%

30 Normal CBC

31 Workup – Second Test The next step is ‘What is the size of RBC’ ? MCV indicates the Red cell volume (size) Both the MCH & MCHC tell Hb content of RBC If the RPI is 2 or less We are dealing with either –Hypoproliferative anaemia (lack of raw material) –Maturation defect with less production –Bone marrow suppression (primary/ secondary)

32 Red Cell Size

33 Mean Cell Volume (MCV) RBC volume (rather) is measured by The Mean Cell Volume or MCV and RDW Microcytic < 80 fl MCV NormocyticMacrocytic fl> 100 fl < 6.5 µ µ> 9 µ

34 Anaemia Workup - MCV Microcytic MCV NormocyticMacrocytic Iron Deficiency IDA Chronic Infections Thalassemias Hemoglobinopathies Sideroblastic Anemia Chronic disease Early IDA Hemoglobinopathies Primary marrow disorders Combined deficiencies Increased destruction Megaloblastic anemias Liver disease/alcohol Hemoglobinopathies Metabolic disorders Marrow disorders Increased destruction

35 Anaemia Workup – 3 rd Test Red cell Distribution Width – RDW RDW < 13 Mean 90 fl RDW is 13 MCV 90 fl

36 Red cell Distribution Width - RDW Microcytic Left MCV NormocyticMacrocytic Mean 90Right

37 Anaemia Workup - 4 th Test Peripheral Smear Study Are all RBC of the same size ? Are all RBC of the same normal discoid shape ? How is the colour (Hb content) saturation ? Are all the RBC of same colour/ multi coloured ? Are there any RBC inclusions ? Are intra RBC there any hemo-parasites ? Are leucocytes normal in number and D.C ? Is platelet distribution adequate ?


39 Severe Hypochromia

40 Microcytic Hypochromic - IDA

41 Microcytic Hypochromic Anaemia Serum Ferritin < 33 pmol / l pmol / l > 270pmol / l Not IDA, Other Mi A TIBC HIGH N or ↓ BM Fe + - Iron Deficiency Anaemia IDA

42 IDA – Special Tests Iron related testsNormal IDA Serum Ferritin (pmo/L) < 33 TIBC (µg/dL) > 400 Serum Iron (µg/dL) < 30 Saturation %30-50 < 10 Bone marrow Iron++ Absent

43 IDA Summary MicrocyticMCV < 80 fl, RBC < 6 µ RDWWidened and shift to left HypochromicMCH < 27 pg, MCHC < 30% RPI < 2 Retic. countMay be > 2 % Serum ferritinVery low < 30 (p mols/L) TIBCIncreased > 400 (µg/dL) Serum IronVery low < 30 (µg/dL) BM Fe StainAbsent Fe Response to Fe Rx.Excellent

44 IDA- Some Nuggets Look for occult blood loss – 2 days non veg. free Pica and Pagophagia – Ice sucking Absorption of Haem Iron > Fe ++ > Fe +++ Food, Phytates, Ca, Phosphate, antacids ↓ absorption Ascorbic acid ↑ absorption Oral iron Rx. always is the best, ? Carbonyl Fe FeSO 4 is the best. Reserve parenteral Rx. Packed cell transfusion in emergency Continue Fe Rx at least 2 months after normal Hb 1 gram ↑ in Hb every week can be expected Always supplement protein for the Globin component

45 Microcytic Anaemias MCV < 80 flSerum IronTIBCBM Perls stain Iron Def. Anemia ↓↓↑↑ 0 Chronic Infection ↓↓ + Thalassemia ↑↑ N+ + Hemoglobinopathy NN + Lead poisoning NN + Sideroblastic ↑↑ N+ +

46 Ringed Sideroblasts in BM Prussian Blue Stain

47 Macrocytic Anaemias A. Megaloblastic Macrocytic – B12 and Folate ↓ B. Non Megaloblastic Macrocytic Anaemias 1.Liver disease/alcohol 2.Hemoglobinopathies 3.Metabolic disorders, Hypothyroidism 4.Myelodystrophy, BM infiltration 5.Accelerated Erythropoesis - ↑ destruction 6.Drugs (cytotoxics, immunosuppressants, AZT, anticonvulsants)

48 Anemia - Macrocytic (MCV > 100) Premature gray hair – consider MBA Macrocytic anemias may be asymptomatic until the Hb is as low as 6 grams MCV fl must look for other causes of macrocytosis MCV > 110 fl almost always folate or B 12 deficiency

49 Macrocytosis of Alcoholism 25-96% of alcoholics MCV elevation usually slight ( fl) Minimal or no anemia Macrocytes round (not oval) Neutrophil hyper segmentation absent Folate stores normal Smoking increases the Red Cell Mass

50 Megaloblastic Hematopoiesis Marrow failure due to Disrupted DNA synth. & ineffective erythropoesis Giant precursors (Megaloblasts) Nuclear : Cytoplasmic dyssynchrony in marrow Neutrophil hyper segmentation & macro ovalocytes Anemia (and often leukopenia & thrombocytopenia) Almost always due to B 12 or folate deficiency

51 MBA

52 Macrocytosis -MBA

53 Anisocytosis - Macrocytic Anaemia

54 HSN - MBA

55 HSN - MBA

56 Basophilic Stippling - MBA BS occurs in Lead poisoning also

57 Megalocyte in PS

58 MBA - BM

59 MBA - BM

60 Megaloblast – FA deficiency

61 Pernicious Anaemia - Tongue Bald, smooth, lemon yellowish red tongue

62 Normocytic Anaemias 1.Chronic disease 2.Early IDA 3.Hemoglobinopathies 4.Primary marrow disorders 5.Combined deficiencies 6.Increased destruction 7.Anaemia of investigations -ICU

63 Anaemia of Chronic Disease Thyroid diseases Malignancy Collagen Vascular Disease –Rheumatoid Arthritis –SLE –Polymyositis –Polyarteritis Nodosa IBD – Ulcerative Colitis – Crohn’s Disease Chronic Infections – HIV, Osteomyelitis – Tuberculosis Renal Failure

64 ‘Dimorphic’ Anaemia Folate & Fe deficiency (pregnancy, alcoholism) B 12 & Fe deficiency (PA with atrophic gastritis) Thalassemia minor & B 12 or folate deficiency Fe deficiency & hemolysis (prosthetic valve) Folate deficiency & hemolysis (Hb SS disease) Peripheral smear exam is critical to assess these RDW is increased very much

65 RBC Size – Anisocytosis Different sizes of RBC

66 Poikilocytosis Different Shapes of RBC

67 Polychromasia - Spherocytosis

68 Target Cells 1.Liver Disease 2.Thalassemia 3.Hb D Disease 4.Post splenectomy

69 Tear Drop Cells 1.Myelofibosis 2.Infiltration of BM 3.Tumours of BM 4.Thalassemia

70 Hair on end - Thalassemia Major

71 Drepanocytes - SS

72 Sickle Cell Anaemia

73 Autosplenectomy - SS Normal spleen is 8 to 12 cm

74 Hemolytic Anaemia Anemia of increased RBC destruction – Normochromic, normocytic anemia – Shortened RBC survival – Reticulocytosis – due to ↑ RBC destruction Will not be symptomatic until the RBC life span is reduced to 20 days – BM compensates 6 times

75 Tests Used to Diagnose Hemolysis 1.Reticulocyte count 2.Combined with serial Hb 3.Serum LDH 4.Serum bilirubin 5.Haptoglobin 6.Urine hemosiderin 7.Hemoglobinuria

76 Findings in Hemolytic Anaemia Reticulocyte count and RPIIncreased Serum Unconjugated BilirubinIncreased Serum LDH 1: LDH 2Increased Serum HaptoglobinDecreased Urine HemoglobinPresent Urine HemosiderinPresent Urine UrobilinogenIncreased Cr 51 labeled RBC life spanDecreased

77 Tests to define the cause of hemolysis 1.Hemoglobin electrophoresis 2.Hemoglobin A 2 (βeta-Thalassemia trait) 3.RBC enzymes (G6PD, PK, etc) 4.Direct & indirect antiglobulin tests (immune) 5.Cold agglutinins 6.Osmotic fragility (spherocytosis) 7.Acid hemolysis test (PNH) 8.Clotting profile (DIC)

78 MAHA Micro Angiopathic Hemolytic Anaemia

79 MAHA Micro Angiopathic Hemolytic Anaemia

80 Hyperactive BM – Skull Hemolytic Anaemia

81 Spherocytosis

82 Spherocytosis Hereditary Spherocytosis

83 Spherocytosis

84 Elliptocytes Hereditary Elliptocytosis, B 12 or Folate↓

85 Stomatocytes S lit like central pallor in RBC 1.Liver Disease 2.Acute Alcoholism 3.H Stomatocyosis 4.Malignancies

86 Echinocytes Evenly distributed spicules > 10 1.Uremia 2.Peptic ulcer 3.Gastric Ca 4.PK-D Called Burr Cells

87 Acanthocytes 5-8 spikes of varying length, irregular intervals Called Spur Cells, Occur in A H A

88 Shistocytes 1.MAHA 2.Prosthetic valves 3.Uremia 4.Malignant HT Fragmented, Helmet or triangle shaped RBC

89 Leukoplakia - Aplastic Anaemia 1.Chloramphenicol 2.Neomercazole 3.Sulfonamides 4.Analgin 5.Phenytoin 6.Butazolidin group 7.Anti Ca drugs

90 Normal BM High Power E : G = 1 : 3

91 Shift in E : G Ratio E : G = 2 : 1

92 BM - Aplastic Anaemia

93 Myelofibrosis

94 Post transfusion - CBC

95 Howell-Jolly Bodies Absence of Splenic function; Nuclear chromatin in RBC

96 Pelger-Huet Anomaly Inherited condition PMN - Spectacles Heterozygous Homozygous fatal Neutrophil Bands ↑ Normal WCC No e/o infection

97 Anaemia Suspected Thorough Clin, Bleed Hb%, RCC, Hct Decreased RPI, Retic count <2 RPI, Retic count >2 Hemolytic Anaemia Coombs DAT, IDAT Hb electrophoresis Osmotic fragility MCV, MCH, MCHC, PSE Microcytic hypochromicMacrocytic hypo/normo MegaloblasticNormoblasticIron Def. Anaemia Ferritin, TIBC, BM Fe Thalassemia, Hb pathy Sederoblastic Anaem. Chr. Infection, Lead Folate defici. B12 def., PA Ca, Leukemia, Ulcer Identify the cause ALD, CLD, Drug Chr. Renal dis. Hypothyroid BM infiltration Acid hemolysis Cold agglutinins Coagulopathy, DIC Anaemia Diagnosis -Algorithm

98 Anaemia - Summary If Hb% is low – Do not start on Iron straight away Ask for RCC, Hematocrit – Derive MCV, MCH, MCHC Order for Reticulocyte count – Is RPI 2% Thoroughly look for blood loss – acute / chronic / occult Is it hypo-proliferative or hemolytic or hemorrhagic anaemia If hypo proliferative – Microcytic or Macrocytic? (MCV, RDW) If microcytic – IDA or others – Spl. Iron tests, BM Iron If macrocytic – Megaloblastic (B12, FA) or Normoblastic BM If normocytic – Anaemia of chr. Disease – Liver, MRD, Ca Peripheral smear study for RBC size, shape, colouration etc. If retic. count is ↑- HA work up; Hb EP, spl. tests

99 Thank You ALL

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