CBC RBC` Flashcards
Reticulocyte
Immature RBC
Contains RNA, present for 1-2 days
Should not be seen in peripheral smear
Normal number of RBCS
4-6 million
More in males
Normal Hb values
Males: 14-18
Females: 12-16
Normal values
MCV
80-100
Normal values
MCHC
31-37
Normal values
RDW
11-16%
Critical values of Hb
<5
> 20
Hct <35%
Moderate to severe anemia
Hct <20%
Cardiac failure
Hct >60%
Increased hemostasis
Increased reticulocyte count indicates
RBC production is occuring
Decreased reticulocyte count indicates
Bone marrow is not making enough RBC
RBC indicates
Define the size and Hb content of red cell
Used to evaluate and classify anemia
MCV
Volume occupied by single red cell
Normal: 80-100 fl
SIZE of cell
Normal MCV
Normocytic
MCV < 80
Microcytic
MCV > 80
Macrocyclic
MCH
Measure of average weight of hemoglobin per RBC
Can be falsely increased by hyperlidemia and heparin
MCHC
Average [Hb] in RBC
Normal values: 31-37
Low MCHC
Hypochromia
High MCHC
Hyperchromia
Can be high in newborns
RDW
Indication of the degree of variation in size of RBC
Normal: 11-16%
Abnormal variation in size
Anisocytosis
Abnormal variation in shape
Poikilocytes
Hypochromia
Pale hollow center
Decreased HgB
Polychromatic
Immature RBCs
Shades of grayish blue
Microcytic
Small cells
Macrocytic
Large cells
Nucleated red cells
Nucleus still present in cell
Basophilic stippling
Punctuate stippling of cell
Indicates lead poisoning
Target cells
Cells w/ dark center and periphery and clear ring b/q
Spherocytes
Spherical cells w/o clear center
Schistocytes
Irregular contracted cells
Fragments
Heinz bodies
DNA ruminants in periphery of RBC
Also Howell Jolly bodies
Nucleated RBCs
Very immature form of RBCs
Seen when severe demand for RBCs to be released from marrow
Should not see unless infants
Test used to measure ability of body to absorb vitamin b12
Schilling test