RBC Objectives and Study Guide
All erythroid cells- includes mature erythrocytes circulating in blood and
immature erythroid cells in the bone marrow
1. Define erythron
a numerical or graphical representation of RBCs as seen in the CBC data and the
morphologic assessment of the RBCs
1. Define Erythrogram
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the process of RBC production
In health there is a balance between production and loss of RBCs. Erythropoiesis
is tightly regulated by what the body needs.
1. Define Erythropoiesis
A deficiency of RBCs and/or hemoglobin - in vet med primarily determined by
HCT or PCV
RBC production < RBC loss
1. Define anemia
An increase in RBC mass
, RBC production > RBC loss
1. Define erythrocytosis
Percentage of blood volume occupied by erythrocytes.
Via centrifugation (spun Hct, sHct)
1. Define hematocrit (Hct) / Packed cell volume (PCV)
RBC mass/ concentration in peripheral blood
1. Define RBC concentration
Average RBC volume
1. Define mean cell volume (MCV)
Average Hgb concentration in RBC
1. Define mean cell Hgb concentration (MCHC)
Average Hgb content in RBCs
1. Define mean cell Hgb (MCH)
Quantitative index of RBC size heterogeneity. Indicates the degree of variation in
RBC size
1. Define red cell distribution width (RDW)
When the difference between calculated Hct (cHct) and spun Hct (PCV, sHct) is
greater than 3%.
POTENTIAL CAUSES?
2. What is a HCT mismatch and what are potential causes?
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