Knowledge Check

Sort the lab parameters (top) according to whether or not they are a routine part of the complete blood count (CBC) (below):

RBC count
MCV
Hb
MCHC
RDW
Platelet count
Red cell stiffness
Retic count
Schistocytes
Hct
aPTT
MCH
WBC count
Part of CBC
Not part of the CBC

Sort the complete blood count (CBC) lab parameters (top) according to whether or not they are measured or calculated by modern-day hematology (bottom): analyzers:

MCHC
Platelet count
Hct
MCV
RBC count
WBC count
Hemoglobin
MCH
Measured
Calculated

Abbreviations: RBC, red blood cell; WBC, white blood cell; MCV, mean cell volume; MCH, mean corpuscular hemoglobin; MCHC, mean corpuscular hemoglobin concentration; Hct, hematocrit.

Match the complete blood count (CBC) parameter with the relevant units:


RBC count
MCH
MCV
Picograms
Trillions per liter
Femtoliters
Correct! Sorry, Incorrect.

Abbreviations: RBC, red blood cell; MCH, mean corpuscular hemoglobin; MCHC, mean corpuscular hemoglobin concentration.

Which is more useful in day-to-day clinical practice:

a
Mean corpuscular hemoglobin concentration (MCHC)
Anemia is classified according to mean cell volume and MCV and MCHC.
b
Mean corpuscular hemoglobin (MCH)
The MCH is not included in anemia classifications. It simply tracks with the MCV and MCHC and offers little useful information (with rare exceptions). See next slide for more information.

MCH tracks with MCV and MCHC. Hold the MCHC constant, increasing the MCV leads to increased MCH. Hold the MCV constant, increasing the MCHC increases the MCH.
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