RBC Indices

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Last updated 2:46 PM on 10/7/26
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20 Terms

1
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Average volume of an individual RBC

MCV (Mean Cell Volume) Definition

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<p>(Hct % / RBC ct. 10^12/L) x 10</p>

(Hct % / RBC ct. 10^12/L) x 10

MCV Formula

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80 to 100 femtoliters

MCV Reference Range

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microcytic

Decreased MCV

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normocytic

Normal MCV

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macrocytic

Increased MCV

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Average weight or amount of hemoglobin in an individual RBC

MCH (Mean Cell Hemoglobin) Definition

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MCH

Follows the MCV (smaller RBCs hold less hemoglobin; larger RBCs hold more)

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<p>(Hb g/dL / RBC ct. 10^12/L) x 10</p>

(Hb g/dL / RBC ct. 10^12/L) x 10

MCH Formula

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26 to 32 picograms

MCH Reference Range

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MCH

NOT used in classification of anemia

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Mean concentration of hemoglobin in the average RBC

MCHC (Mean Cell Hemoglobin Concentration) Definition

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<p>(Hb g/dL / Hct %) x 100</p>

(Hb g/dL / Hct %) x 100

MCHC Formula

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31 to 37 g/dL or %

MCHC Reference Range

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hypochromic

Decreased MCHC

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normochromic

Normal MCHC

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hyperchromic (ONLY IF: truly high MCHC)

  1. possible false increase

  2. investigate

  3. if no prob detected → report as true "High MCHC")


Increased MCHC

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37 g/dL

RBCs cannot accommodate more Hb than ___

  • therefore, a result greater should be recomputed to ensure accurate measurement and rule out interfering substances


19
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Falsely increased Hb

one probable cause for:

  • Normal MCV

  • High MCH


20
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