Mean corpuscular hemoglobin
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mean corpuscular hemoglobin
n
x
A measure of the weight of hemoglobin in a single red blood cell. The value is obtained by multiplying the hemoglobin value by 10 and dividing by the number of red blood cells. The normal range is between 27 and 31.
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Mean corpuscular hemoglobin
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This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (April 2008) |
The mean corpuscular hemoglobin, 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.
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Contents
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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+12 cells/liter | |
| 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
- ^ a b "MedlinePlus Medical Encyclopedia: RBC indices". http://www.nlm.nih.gov/medlineplus/ency/article/003648.htm#Why%20the%20test%20is%20performed. Retrieved 2009-03-03.
- ^ "Mean Cell Hemoglobin". http://diaglab.vet.cornell.edu/clinpath/modules/hemogram/mch.htm. Retrieved 2009-03-03.
- ^ Praktikum der Hundeklinik (10 ed.). 2006. p. 102. ISBN 3-8304-4141-X.
External links
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