Mean corpuscular hemoglobin
Not to be confused with mean corpuscular hemoglobin concentration, although they are predictably correlated in healthy states.
The mean corpuscular hemoglobin (MCH), or "mean cell hemoglobin" (MCH), is the average mass of hemoglobin per red blood cell in a sample of blood. It is reported as part of a standard complete blood count. MCH value is diminished in hypochromic anemias.[1]
It is calculated by dividing the total mass of hemoglobin by the number of red blood cells in a volume of blood.
MCH=(Hgb*10)/RBC [2]
A normal value in humans is 27 to 31 picograms/cell.[1] Conversion to SI-units: 1 pg of hemoglobin = 0.06207 femtomol.[3] Normal value converted to SI-units: 1.68 - 1.92 fmol/cell.
See also
Worked example
| Measure | Units | Conventional units | Conversion |
|---|---|---|---|
| Hct | 40% | ||
| Hb | 100 grams/liter | 10 grams/deciliter | (deci- is 10−1) |
| RBC | 5E+12 cells/liter | 5E+6 cells/μL | (micro is 10−6) |
| MCV = Hct / RBC | 8E-14 liters/cell | 80 femtoliters/cell | (femto- is 10−15) |
| MCH = Hb / RBC | 2E-11 grams/cell | 20 picograms/cell | (pico- is 10−12) |
| MCHC = MCH / MCV | 250 grams/liter | 25 grams/deciliter | (deci is 10−1) |
References
- 1 2 "MedlinePlus Medical Encyclopedia: RBC indices". Retrieved 2009-03-03.
- ↑ "Mean Cell Hemoglobin". Retrieved 2009-03-03.
- ↑ Praktikum der Hundeklinik (10 ed.). 2006. p. 102. ISBN 3-8304-4141-X.
External links
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