Anemia

on 4.3.09 with 0 comments



  • RBC count – normally 4.1 – 5.3 X 106 per mm3

  • Hb – normally 12.0 – 17.5 g/dL

  • HCT

    • Normally 36 – 53

    • May be measured directly (“spun crit”) or calculated (MCV X RBC ÷ 10)

  • Mean corpuscular volume

    • This is the average size of the RBCs (normal = 80 – 100)

    • Microcytic = decreased MCV

    • Normocytic = normal MCV

    • Macrocytic = increased MCV

  • Mean corpuscular Hb – normal = 26 – 34

  • Mean corpuscular [Hb]

    • MCHC = (Hb ÷ HCT) X 100 (normal = 30 – 36

    • Hypochromic = decreased MCHC

    • Normochromic = normal MCHC

    • Hyperchromic = artifactual

  • RBC distribution width – variation in RBC size (i.e., anisocytosis)

  • The rule of 3’s

    • RBC X 3 = Hb ± 3

    • Hb X 3 = HCT ± 3

Category: Medical Subject Notes , Pathology Notes

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