Red Cell Distribution Width (RDW) Correlated with Peripheral Smear, continued

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The page below is a sample from the LabCE course Describing a Red Blood Cell Population Using RBC Indices and Red Cell Distribution Width. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Red Cell Distribution Width (RDW) Correlated with Peripheral Smear, continued

The RDW can also be correlated with the histogram produced by the automated blood cell counter. As seen in Figure 6, a narrow distribution curve indicates a homogenous population of red cells.
Figure 6

As shown in Figure 7, the wider the distribution curve, the more heterogeneous the population of red cells.
Figure 7