Calculate the following corrected reticulocyte count
which was performed using
the Miller disc method. The patient is an adult male. Show calculation.
# reticulocytes counted in larger square: 26
# RBCs (all cells) in smaller square: 111
Formula to calculate corrected reticilocyte index in Miller disc method is as follows
= total reticulocyte in big square×100/total RBC in small square ×9
Here total reticulocyte in big square=26
RBC in smaller square=111.
Corrected reticulocye count=2.6.
Corrected reticulocyte count is also known as reticulocyte index.
Corrected reticulocyte count is calculated based on normal hematocrit of 45%
In states of anemia, the reticulocyte percentage is not a true reflection of reticulocyte production. A correction factor must be used so as not to overestimate marrow production, because each reticulocyte is released into whole blood containing few RBC s-thus relatively increasing the percentage.
Average normal hematocrit for male is 45% and 42%
Corrected retic count is calculated by using formula,
=retic%×patients hematocrit%/average normal hematocrit.
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